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Ang CYS, Chiew YS, Wang X, Ooi EH, Cove ME, Chen Y, Zhou C, Chase JG. Patient-ventilator asynchrony classification in mechanically ventilated patients: Model-based or machine learning method? COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2024; 255:108323. [PMID: 39029417 DOI: 10.1016/j.cmpb.2024.108323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/27/2024] [Accepted: 07/10/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND AND OBJECTIVE Patient-ventilator asynchrony (PVA) is associated with poor clinical outcomes and remains under-monitored. Automated PVA detection would enable complete monitoring standard observational methods do not allow. While model-based and machine learning PVA approaches exist, they have variable performance and can miss specific PVA events. This study compares a model and rule-based algorithm with a machine learning PVA method by retrospectively validating both methods using an independent patient cohort. METHODS Hysteresis loop analysis (HLA) which is a rule-based method (RBM) and a tri-input convolutional neural network (TCNN) machine learning model are used to classify 7 different types of PVA, including: 1) flow asynchrony; 2) reverse triggering; 3) premature cycling; 4) double triggering; 5) delayed cycling; 6) ineffective efforts; and 7) auto triggering. Class activation mapping (CAM) heatmaps visualise sections of respiratory waveforms the TCNN model uses for decision making, improving result interpretability. Both PVA classification methods were used to classify incidence in an independent retrospective clinical cohort of 11 mechanically ventilated patients for validation and performance comparison. RESULTS Self-validation with the training dataset shows overall better HLA performance (accuracy, sensitivity, specificity: 97.5 %, 96.6 %, 98.1 %) compared to the TCNN model (accuracy, sensitivity, specificity: 89.5 %, 98.3 %, 83.9 %). In this study, the TCNN model demonstrates higher sensitivity in detecting PVA, but HLA was better at identifying non-PVA breathing cycles due to its rule-based nature. While the overall AI identified by both classification methods are very similar, the intra-patient distribution of each PVA type varies between HLA and TCNN. CONCLUSION The collective findings underscore the efficacy of both HLA and TCNN in PVA detection, indicating the potential for real-time continuous monitoring of PVA. While ML methods such as TCNN demonstrate good PVA identification performance, it is essential to ensure optimal model architecture and diversity in training data before widespread uptake as standard care. Moving forward, further validation and adoption of RBM methods, such as HLA, offers an effective approach to PVA detection while providing clear distinction into the underlying patterns of PVA, better aligning with clinical needs for transparency, explicability, adaptability and reliability of these emerging tools for clinical care.
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Affiliation(s)
| | - Yeong Shiong Chiew
- School of Engineering, Monash University Malaysia, Selangor, Malaysia; Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand.
| | - Xin Wang
- School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Ean Hin Ooi
- School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Matthew E Cove
- Division of Respiratory & Critical Care Medicine, Department of Medicine, National University Health System, Singapore
| | - Yuhong Chen
- Intensive Care Unit, the Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China
| | - Cong Zhou
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
| | - J Geoffrey Chase
- Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
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Jackson R, Kim A, Moroz N, Damiani LF, Grieco DL, Piraino T, Friedrich JO, Mercat A, Telias I, Brochard LJ. Reverse triggering ? a novel or previously missed phenomenon? Ann Intensive Care 2024; 14:78. [PMID: 38776032 PMCID: PMC11111438 DOI: 10.1186/s13613-024-01303-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 04/27/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Reverse triggering (RT) was described in 2013 as a form of patient-ventilator asynchrony, where patient's respiratory effort follows mechanical insufflation. Diagnosis requires esophageal pressure (Pes) or diaphragmatic electrical activity (EAdi), but RT can also be diagnosed using standard ventilator waveforms. HYPOTHESIS We wondered (1) how frequently RT would be present but undetected in the figures from literature, especially before 2013; (2) whether it would be more prevalent in the era of small tidal volumes after 2000. METHODS We searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials, from 1950 to 2017, with key words related to asynchrony to identify papers with figures including ventilator waveforms expected to display RT if present. Experts labelled waveforms. 'Definite' RT was identified when Pes or EAdi were in the tracing, and 'possible' RT when only flow and pressure waveforms were present. Expert assessment was compared to the author's descriptions of waveforms. RESULTS We found 65 appropriate papers published from 1977 to now, containing 181 ventilator waveforms. 21 cases of 'possible' RT and 25 cases of 'definite' RT were identified by the experts. 18.8% of waveforms prior to 2013 had evidence of RT. Most cases were published after 2000 (1 before vs. 45 after, p = 0.03). 54% of RT cases were attributed to different phenomena. A few cases of identified RT were already described prior to 2013 using different terminology (earliest in 1997). While RT cases attributed to different phenomena decreased after 2013, 60% of 'possible' RT remained missed. CONCLUSION RT has been present in the literature as early as 1997, but most cases were found after the introduction of low tidal volume ventilation in 2000. Following 2013, the number of undetected cases decreased, but RT are still commonly missed. Reverse Triggering, A Missed Phenomenon in the Literature. Critical Care Canada Forum 2019 Abstracts. Can J Anesth/J Can Anesth 67 (Suppl 1), 1-162 (2020). https://doi-org.myaccess.library.utoronto.ca/ https://doi.org/10.1007/s12630-019-01552-z .
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Affiliation(s)
- Robert Jackson
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Audery Kim
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Nikolay Moroz
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Department of Respiratory Therapy, McGill University Health Centre, Montreal, QC, Canada
| | - L Felipe Damiani
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Departamento Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Domenico Luca Grieco
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Anesthesia, Italy
- Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Thomas Piraino
- Department of Anesthesia, Division of Critical Care, McMaster University, Hamilton, ON, Canada
| | - Jan O Friedrich
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Alain Mercat
- Medical ICU and Vent'Lab, University Hospital of Angers, University of Angers, 4 Rue Larrey, Angers Cedex 9, 49933, France
| | - Irene Telias
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Laurent J Brochard
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada.
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada.
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Carvalho EV, Reboredo MM, Gomes EP, Martins PN, Mota GPS, Costa GB, Colugnati FAB, Pinheiro BV. Driving pressure, as opposed to tidal volume based on predicted body weight, is associated with mortality: results from a prospective cohort of COVID-19 acute respiratory distress syndrome patients. CRITICAL CARE SCIENCE 2024; 36:e20240208en. [PMID: 38747818 PMCID: PMC11098065 DOI: 10.62675/2965-2774.20240208-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 01/06/2024] [Indexed: 05/18/2024]
Abstract
OBJECTIVE To evaluate the association between driving pressure and tidal volume based on predicted body weight and mortality in a cohort of patients with acute respiratory distress syndrome caused by COVID-19. METHODS This was a prospective, observational study that included patients with acute respiratory distress syndrome due to COVID-19 admitted to two intensive care units. We performed multivariable analyses to determine whether driving pressure and tidal volume/kg predicted body weight on the first day of mechanical ventilation, as independent variables, are associated with hospital mortality. RESULTS We included 231 patients. The mean age was 64 (53 - 74) years, and the mean Simplified Acute and Physiology Score 3 score was 45 (39 - 54). The hospital mortality rate was 51.9%. Driving pressure was independently associated with hospital mortality (odds ratio 1.21, 95%CI 1.04 - 1.41 for each cm H2O increase in driving pressure, p = 0.01). Based on a double stratification analysis, we found that for the same level of tidal volume/kg predicted body weight, the risk of hospital death increased with increasing driving pressure. However, changes in tidal volume/kg predicted body weight were not associated with mortality when they did not lead to an increase in driving pressure. CONCLUSION In patients with acute respiratory distress syndrome caused by COVID-19, exposure to higher driving pressure, as opposed to higher tidal volume/kg predicted body weight, is associated with greater mortality. These results suggest that driving pressure might be a primary target for lung-protective mechanical ventilation in these patients.
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Affiliation(s)
- Erich Vidal Carvalho
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Maycon Moura Reboredo
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Edimar Pedrosa Gomes
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Pedro Nascimento Martins
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Gabriel Paz Souza Mota
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Giovani Bernardo Costa
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Fernando Antonio Basile Colugnati
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Bruno Valle Pinheiro
- Universidade Federal de Juiz de ForaHospital UniversitárioPulmonary and Critical Care DivisionJuiz de ForaMGBrazilPulmonary and Critical Care Division, Hospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
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Sottile PD, Smith B, Stroh JN, Albers DJ, Moss M. Flow-Limited and Reverse-Triggered Ventilator Dyssynchrony Are Associated With Increased Tidal and Dynamic Transpulmonary Pressure. Crit Care Med 2024; 52:743-751. [PMID: 38214566 PMCID: PMC11018465 DOI: 10.1097/ccm.0000000000006180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
OBJECTIVES Ventilator dyssynchrony may be associated with increased delivered tidal volumes (V t s) and dynamic transpulmonary pressure (ΔP L,dyn ), surrogate markers of lung stress and strain, despite low V t ventilation. However, it is unknown which types of ventilator dyssynchrony are most likely to increase these metrics or if specific ventilation or sedation strategies can mitigate this potential. DESIGN A prospective cohort analysis to delineate the association between ten types of breaths and delivered V t , ΔP L,dyn , and transpulmonary mechanical energy. SETTING Patients admitted to the medical ICU. PATIENTS Over 580,000 breaths from 35 patients with acute respiratory distress syndrome (ARDS) or ARDS risk factors. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Patients received continuous esophageal manometry. Ventilator dyssynchrony was identified using a machine learning algorithm. Mixed-effect models predicted V t , ΔP L,dyn , and transpulmonary mechanical energy for each type of ventilator dyssynchrony while controlling for repeated measures. Finally, we described how V t , positive end-expiratory pressure (PEEP), and sedation (Richmond Agitation-Sedation Scale) strategies modify ventilator dyssynchrony's association with these surrogate markers of lung stress and strain. Double-triggered breaths were associated with the most significant increase in V t , ΔP L,dyn , and transpulmonary mechanical energy. However, flow-limited, early reverse-triggered, and early ventilator-terminated breaths were also associated with significant increases in V t , ΔP L,dyn , and energy. The potential of a ventilator dyssynchrony type to increase V t , ΔP L,dyn , or energy clustered similarly. Increasing set V t may be associated with a disproportionate increase in high-volume and high-energy ventilation from double-triggered breaths, but PEEP and sedation do not clinically modify the interaction between ventilator dyssynchrony and surrogate markers of lung stress and strain. CONCLUSIONS Double-triggered, flow-limited, early reverse-triggered, and early ventilator-terminated breaths are associated with increases in V t , ΔP L,dyn , and energy. As flow-limited breaths are more than twice as common as double-triggered breaths, further work is needed to determine the interaction of ventilator dyssynchrony frequency to cause clinically meaningful changes in patient outcomes.
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Affiliation(s)
- Peter D Sottile
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Bradford Smith
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
- Division of Pediatric Pulmonary and Sleep Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Jake N Stroh
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - David J Albers
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
- Department of Biomedical Informatics, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Marc Moss
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
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Baedorf-Kassis E, Murn M, Dzierba AL, Serra AL, Garcia I, Minus E, Padilla C, Sarge T, Goodspeed VM, Matthay MA, Gong MN, Cook D, Loring SH, Talmor D, Beitler JR. Respiratory drive heterogeneity associated with systemic inflammation and vascular permeability in acute respiratory distress syndrome. Crit Care 2024; 28:136. [PMID: 38654391 PMCID: PMC11036740 DOI: 10.1186/s13054-024-04920-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND In acute respiratory distress syndrome (ARDS), respiratory drive often differs among patients with similar clinical characteristics. Readily observable factors like acid-base state, oxygenation, mechanics, and sedation depth do not fully explain drive heterogeneity. This study evaluated the relationship of systemic inflammation and vascular permeability markers with respiratory drive and clinical outcomes in ARDS. METHODS ARDS patients enrolled in the multicenter EPVent-2 trial with requisite data and plasma biomarkers were included. Neuromuscular blockade recipients were excluded. Respiratory drive was measured as PES0.1, the change in esophageal pressure during the first 0.1 s of inspiratory effort. Plasma angiopoietin-2, interleukin-6, and interleukin-8 were measured concomitantly, and 60-day clinical outcomes evaluated. RESULTS 54.8% of 124 included patients had detectable respiratory drive (PES0.1 range of 0-5.1 cm H2O). Angiopoietin-2 and interleukin-8, but not interleukin-6, were associated with respiratory drive independently of acid-base, oxygenation, respiratory mechanics, and sedation depth. Sedation depth was not significantly associated with PES0.1 in an unadjusted model, or after adjusting for mechanics and chemoreceptor input. However, upon adding angiopoietin-2, interleukin-6, or interleukin-8 to models, lighter sedation was significantly associated with higher PES0.1. Risk of death was less with moderate drive (PES0.1 of 0.5-2.9 cm H2O) compared to either lower drive (hazard ratio 1.58, 95% CI 0.82-3.05) or higher drive (2.63, 95% CI 1.21-5.70) (p = 0.049). CONCLUSIONS Among patients with ARDS, systemic inflammatory and vascular permeability markers were independently associated with higher respiratory drive. The heterogeneous response of respiratory drive to varying sedation depth may be explained in part by differences in inflammation and vascular permeability.
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Affiliation(s)
- Elias Baedorf-Kassis
- Division of Pulmonary and Critical Care Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Michael Murn
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
| | - Amy L Dzierba
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
- Department of Pharmacy, New York-Presbyterian Hospital, New York, NY, USA
| | - Alexis L Serra
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
| | - Ivan Garcia
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
| | - Emily Minus
- Departments of Medicine and Anesthesia, University of California San Francisco, San Francisco, CA, USA
| | - Clarissa Padilla
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
| | - Todd Sarge
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Valerie M Goodspeed
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Michael A Matthay
- Departments of Medicine and Anesthesia, University of California San Francisco, San Francisco, CA, USA
| | - Michelle N Gong
- Department of Critical Care Medicine, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Deborah Cook
- St. Joseph's Hospital and McMaster University, Hamilton, ON, Canada
| | - Stephen H Loring
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Daniel Talmor
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Jeremy R Beitler
- Columbia Respiratory Critical Care Trials Group, Columbia University College of Physicians and Surgeons, and New York-Presbyterian Hospital, 622 West 168th Street, New York, NY, 10032, USA.
- Center for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA.
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Georgopoulos D, Bolaki M, Stamatopoulou V, Akoumianaki E. Respiratory drive: a journey from health to disease. J Intensive Care 2024; 12:15. [PMID: 38650047 DOI: 10.1186/s40560-024-00731-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 04/12/2024] [Indexed: 04/25/2024] Open
Abstract
Respiratory drive is defined as the intensity of respiratory centers output during the breath and is primarily affected by cortical and chemical feedback mechanisms. During the involuntary act of breathing, chemical feedback, primarily mediated through CO2, is the main determinant of respiratory drive. Respiratory drive travels through neural pathways to respiratory muscles, which execute the breathing process and generate inspiratory flow (inspiratory flow-generation pathway). In a healthy state, inspiratory flow-generation pathway is intact, and thus respiratory drive is satisfied by the rate of volume increase, expressed by mean inspiratory flow, which in turn determines tidal volume. In this review, we will explain the pathophysiology of altered respiratory drive by analyzing the respiratory centers response to arterial partial pressure of CO2 (PaCO2) changes. Both high and low respiratory drive have been associated with several adverse effects in critically ill patients. Hence, it is crucial to understand what alters the respiratory drive. Changes in respiratory drive can be explained by simultaneously considering the (1) ventilatory demands, as dictated by respiratory centers activity to CO2 (brain curve); (2) actual ventilatory response to CO2 (ventilation curve); and (3) metabolic hyperbola. During critical illness, multiple mechanisms affect the brain and ventilation curves, as well as metabolic hyperbola, leading to considerable alterations in respiratory drive. In critically ill patients the inspiratory flow-generation pathway is invariably compromised at various levels. Consequently, mean inspiratory flow and tidal volume do not correspond to respiratory drive, and at a given PaCO2, the actual ventilation is less than ventilatory demands, creating a dissociation between brain and ventilation curves. Since the metabolic hyperbola is one of the two variables that determine PaCO2 (the other being the ventilation curve), its upward or downward movements increase or decrease respiratory drive, respectively. Mechanical ventilation indirectly influences respiratory drive by modifying PaCO2 levels through alterations in various parameters of the ventilation curve and metabolic hyperbola. Understanding the diverse factors that modulate respiratory drive at the bedside could enhance clinical assessment and the management of both the patient and the ventilator.
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Affiliation(s)
| | - Maria Bolaki
- Department of Intensive Care Medicine, University Hospital of Heraklion, Heraklion, Crete, Greece
| | - Vaia Stamatopoulou
- Department of Pulmonary Medicine, University Hospital of Heraklion, Heraklion , Crete, Greece
| | - Evangelia Akoumianaki
- Medical School, University of Crete, Heraklion, Crete, Greece
- Department of Intensive Care Medicine, University Hospital of Heraklion, Heraklion, Crete, Greece
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7
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de Haro C, Santos-Pulpón V, Telías I, Xifra-Porxas A, Subirà C, Batlle M, Fernández R, Murias G, Albaiceta GM, Fernández-Gonzalo S, Godoy-González M, Gomà G, Nogales S, Roca O, Pham T, López-Aguilar J, Magrans R, Brochard L, Blanch L, Sarlabous L. Flow starvation during square-flow assisted ventilation detected by supervised deep learning techniques. Crit Care 2024; 28:75. [PMID: 38486268 PMCID: PMC10938655 DOI: 10.1186/s13054-024-04845-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 02/19/2024] [Indexed: 03/18/2024] Open
Abstract
BACKGROUND Flow starvation is a type of patient-ventilator asynchrony that occurs when gas delivery does not fully meet the patients' ventilatory demand due to an insufficient airflow and/or a high inspiratory effort, and it is usually identified by visual inspection of airway pressure waveform. Clinical diagnosis is cumbersome and prone to underdiagnosis, being an opportunity for artificial intelligence. Our objective is to develop a supervised artificial intelligence algorithm for identifying airway pressure deformation during square-flow assisted ventilation and patient-triggered breaths. METHODS Multicenter, observational study. Adult critically ill patients under mechanical ventilation > 24 h on square-flow assisted ventilation were included. As the reference, 5 intensive care experts classified airway pressure deformation severity. Convolutional neural network and recurrent neural network models were trained and evaluated using accuracy, precision, recall and F1 score. In a subgroup of patients with esophageal pressure measurement (ΔPes), we analyzed the association between the intensity of the inspiratory effort and the airway pressure deformation. RESULTS 6428 breaths from 28 patients were analyzed, 42% were classified as having normal-mild, 23% moderate, and 34% severe airway pressure deformation. The accuracy of recurrent neural network algorithm and convolutional neural network were 87.9% [87.6-88.3], and 86.8% [86.6-87.4], respectively. Double triggering appeared in 8.8% of breaths, always in the presence of severe airway pressure deformation. The subgroup analysis demonstrated that 74.4% of breaths classified as severe airway pressure deformation had a ΔPes > 10 cmH2O and 37.2% a ΔPes > 15 cmH2O. CONCLUSIONS Recurrent neural network model appears excellent to identify airway pressure deformation due to flow starvation. It could be used as a real-time, 24-h bedside monitoring tool to minimize unrecognized periods of inappropriate patient-ventilator interaction.
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Affiliation(s)
- Candelaria de Haro
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT-CERCA),, Carrer Parc Taulí, 1, 08208, Sabadell, Spain.
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain.
| | - Verónica Santos-Pulpón
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Sabadell, Spain
| | - Irene Telías
- Keenan Research Center for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Division of Respirology, Department of Medicine, University Health Network and Sinai Health System, Toronto, ON, Canada
| | - Alba Xifra-Porxas
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Sabadell, Spain
| | - Carles Subirà
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Critial Care Department, Althaia Xarxa Assistencial Universtaria de Manresa, Manresa, Spain
- IRIS - Catalunya Central I Grup de Recerca de Malalt Crític, Manresa, Spain
| | - Montserrat Batlle
- Critial Care Department, Althaia Xarxa Assistencial Universtaria de Manresa, Manresa, Spain
- IRIS - Catalunya Central I Grup de Recerca de Malalt Crític, Manresa, Spain
| | - Rafael Fernández
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Critial Care Department, Althaia Xarxa Assistencial Universtaria de Manresa, Manresa, Spain
- IRIS - Catalunya Central I Grup de Recerca de Malalt Crític, Manresa, Spain
| | - Gastón Murias
- Critical Care Department, Hospital Británico, Buenos Aires, Argentina
| | - Guillermo M Albaiceta
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Unidad de Cuidados Intensivos Cardiológicos, Hospital Universitario Central de Asturias. Universidad de Oviedo, Oviedo, Spain
| | - Sol Fernández-Gonzalo
- Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Sabadell, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | | | - Gemma Gomà
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT-CERCA),, Carrer Parc Taulí, 1, 08208, Sabadell, Spain
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Sara Nogales
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT-CERCA),, Carrer Parc Taulí, 1, 08208, Sabadell, Spain
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Oriol Roca
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT-CERCA),, Carrer Parc Taulí, 1, 08208, Sabadell, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Tai Pham
- Service de Médecine Intensive-Réanimation, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Groupe de Recherche Clinique CARMAS, Université Paris-Saclay, AP-HP, Le Kremlin-Bicêtre, France
- Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Inserm U1018, Equipe d'Epidémiologie Respiratoire Intégrative, Center de Recherche en Epidémiologie et Santé Des Populations, Villejuif, France
| | - Josefina López-Aguilar
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Sabadell, Spain
| | | | - Laurent Brochard
- Keenan Research Center for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Lluís Blanch
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT-CERCA),, Carrer Parc Taulí, 1, 08208, Sabadell, Spain
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Leonardo Sarlabous
- Centro Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Institut d'Investigació i Innovació Parc Taulí (I3PT-CERCA), Sabadell, Spain
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Seitz KP, Lloyd BD, Wang L, Shotwell MS, Qian ET, Richardson RK, Rooks JC, Hennings-Williams V, Sandoval CE, Richardson WD, Morgan T, Thompson AN, Hastings PG, Ring TP, Stollings JL, Talbot EM, Krasinski DJ, Decoursey B, Gibbs KW, Self WH, Mixon AS, Rice TW, Semler MW, Casey JD. Protocol and Statistical Analysis Plan for the Mode of Ventilation During Critical Illness (MODE) Trial. CHEST CRITICAL CARE 2024; 2:100033. [PMID: 38742219 PMCID: PMC11090486 DOI: 10.1016/j.chstcc.2023.100033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
BACKGROUND For every critically ill adult receiving invasive mechanical ventilation, clinicians must select a mode of ventilation. The mode of ventilation determines whether the ventilator directly controls the tidal volume or the inspiratory pressure. Newer hybrid modes allow clinicians to set a target tidal volume; the ventilator controls and adjusts the inspiratory pressure. A strategy of low tidal volumes and low plateau pressure improves outcomes, but the optimal mode to achieve these targets is not known. RESEARCH QUESTION Can a cluster-randomized trial design be used to assess whether the mode of mandatory ventilation affects the number of days alive and free of invasive mechanical ventilation among critically ill adults? STUDY DESIGN AND METHODS The Mode of Ventilation During Critical Illness (MODE) trial is a cluster-randomized, multiple-crossover pilot trial being conducted in the medical ICU at an academic center. The MODE trial compares the use of volume control, pressure control, and adaptive pressure control. The study ICU is assigned to a single-ventilator mode (volume control vs pressure control vs adaptive pressure control) for continuous mandatory ventilation during each 1-month study block. The assigned mode switches every month in a randomly generated sequence. The primary outcome is ventilator-free days to study day 28, defined as the number of days alive and free of invasive mechanical ventilation from the final receipt of mechanical ventilation to 28 days after enrollment. Enrollment began November 1, 2022, and will end on July 31, 2023. RESULTS This manuscript describes the protocol and statistical analysis plan for the MODE trial of ventilator modes comparing volume control, pressure control, and adaptive pressure control. INTERPRETATION Prespecifying the full statistical analysis plan prior to completion of enrollment increases rigor, reproducibility, and transparency of the trial results. CLINICAL TRIAL REGISTRATION The trial was registered with clinicaltrials.gov on October 3, 2022, before initiation of patient enrollment on November 1, 2022 (ClinicalTrials.gov identifier: NCT05563779).
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Affiliation(s)
- Kevin P Seitz
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Bradley D Lloyd
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Li Wang
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Matthew S Shotwell
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Edward T Qian
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Roger K Richardson
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Jeffery C Rooks
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Vanessa Hennings-Williams
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Claire E Sandoval
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Whitney D Richardson
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Tracy Morgan
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Amber N Thompson
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Pamela G Hastings
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Terry P Ring
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Joanna L Stollings
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Erica M Talbot
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - David J Krasinski
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Bailey Decoursey
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Kevin W Gibbs
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Wesley H Self
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Amanda S Mixon
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Todd W Rice
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Matthew W Semler
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
| | - Jonathan D Casey
- Department of Medicine (K. P. S., E. T. Q., T. W. R., M. W. S., and J. D. C.), Division of Allergy, Pulmonary and Critical Care Medicine; the Department of Emergency Medicine (B. D. L. and W. H. S.); the Department of Biostatistics (L. W. and M. S. S.); the Department of Respiratory Care (R. K. R., J. C. R., V. H.-W., C. E. S., W. D. R., T. M., A. N. T., P. G. H., and T. P. R.); the Department of Pharmaceutical Services (J. L. S.); the Department of Medicine (E. M. T., D. J. K., and B. D.), Vanderbilt University Medical Center, Nashville, TN; the Section on Pulmonary, Critical Care, Allergy, and Immunology (K. W. G.), Wake Forest School of Medicine, Winston-Salem, NC; the Vanderbilt Institute for Clinical and Translational Research (W. H. S.), Vanderbilt University Medical Center, Nashville, TN; the Department of Medicine, Division of General Internal Medicine and Public Health (A. S. M.), Vanderbilt University Medical Center, Nashville, TN; and the VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center (A. S. M.), Nashville, TN
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9
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Chelbi R, Thabet F, Ennouri E, Meddeb K, Toumi R, Zghidi M, Ben Saida I, Boussarsar M. The Ability of Critical Care Physicians to Identify Patient-Ventilator Asynchrony Using Waveform Analysis: A National Survey. Respir Care 2024; 69:176-183. [PMID: 38267232 PMCID: PMC10898468 DOI: 10.4187/respcare.11360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
BACKGROUND Improved patient-ventilator asynchrony (PVA) identification using waveform analysis by critical care physicians (CCPs) may improve patient outcomes. This study aimed to assess the ability of CCPs to identify different types of PVAs using waveform analysis as well as factors related to this ability. METHODS We surveyed 12 university-affiliated medical ICUs (MICUs) in Tunisia. CCPs practicing in these MICUs were asked to visually identify 4 clinical cases, each corresponding to a different PVA. We collected the following characteristics regarding CCPs: scientific grade, years of experience, prior training in mechanical ventilation, prior exposure to waveform analysis, and the characteristics of the MICUs in which they practice. Respondents were categorized into 2 groups based on their ability to correctly identify PVAs (defined as the correct identification of at least 3 of the 4 PVA cases). Univariate analysis was performed to identify factors related to the correct identification of PVA. RESULTS Among 136 included CCPs, 72 (52.9%) responded to the present survey. The respondents comprised 59 (81.9%) residents, and 13 (18.1%) senior physicians. Further, 50 (69.4%) respondents had attended prior training in mechanical ventilation. Moreover, 21 (29.2%) of the respondents could correctly identify PVAs. Double-triggering was the most frequently identified PVA type, 43 (59.7%), followed by auto-triggering, 36 (50%); premature cycling, 28 (38.9%); and ineffective efforts, 25 (34.7%). Univariate analysis indicated that senior physicians had a better ability to correctly identify PVAs than residents (7 [53.8%] vs 14 [23.7%], P = .044). CONCLUSIONS The present study revealed a significant deficiency in the accurate visual identification of PVAs among CCPs in the MICUs. When compared to residents, senior physicians exhibited a notably superior aptitude for correctly recognizing PVAs.
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Affiliation(s)
- Rym Chelbi
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Farah Thabet
- University of Monastir, Faculty of Medicine of Monastir, Monastir, Tunisia; and Pediatric Department, Fattouma Bourguiba University Hospital, Monastir, Tunisia; University of Medicine of Monastir, Monastir, Tunisia
| | - Emna Ennouri
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Khaoula Meddeb
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Radhouane Toumi
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Marwa Zghidi
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Imen Ben Saida
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia
| | - Mohamed Boussarsar
- University of Sousse, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia; and Farhat Hached University Hospital, Medical Intensive Care Unit, Research Laboratory "Heart Failure," LR12SP09, 4000, Sousse, Tunisia.
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10
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Hsu PC, Lin YT, Kao KC, Peng CK, Sheu CC, Liang SJ, Chan MC, Wang HC, Chen YM, Chen WC, Yang KY. Risk factors for prolonged mechanical ventilation in critically ill patients with influenza-related acute respiratory distress syndrome. Respir Res 2024; 25:9. [PMID: 38178147 PMCID: PMC10765923 DOI: 10.1186/s12931-023-02648-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 12/20/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Patients with influenza-related acute respiratory distress syndrome (ARDS) are critically ill and require mechanical ventilation (MV) support. Prolonged mechanical ventilation (PMV) is often seen in these cases and the optimal management strategy is not established. This study aimed to investigate risk factors for PMV and factors related to weaning failure in these patients. METHODS This retrospective cohort study was conducted by eight medical centers in Taiwan. All patients in the intensive care unit with virology-proven influenza-related ARDS requiring invasive MV from January 1 to March 31, 2016, were included. Demographic data, critical illness data and clinical outcomes were collected and analyzed. PMV is defined as mechanical ventilation use for more than 21 days. RESULTS There were 263 patients with influenza-related ARDS requiring invasive MV enrolled during the study period. Seventy-eight patients had PMV. The final weaning rate was 68.8% during 60 days of observation. The mortality rate in PMV group was 39.7%. Risk factors for PMV were body mass index (BMI) > 25 (kg/m2) [odds ratio (OR) 2.087; 95% confidence interval (CI) 1.006-4.329], extracorporeal membrane oxygenation (ECMO) use (OR 6.181; 95% CI 2.338-16.336), combined bacterial pneumonia (OR 4.115; 95% CI 2.002-8.456) and neuromuscular blockade use over 48 h (OR 2.8; 95% CI 1.334-5.879). In addition, risk factors for weaning failure in PMV patients were ECMO (OR 5.05; 95% CI 1.75-14.58) use and bacteremia (OR 3.91; 95% CI 1.20-12.69). CONCLUSIONS Patients with influenza-related ARDS and PMV have a high mortality rate. Risk factors for PMV include BMI > 25, ECMO use, combined bacterial pneumonia and neuromuscular blockade use over 48 h. In addition, ECMO use and bacteremia predict unsuccessful weaning in PMV patients.
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Affiliation(s)
- Pai-Chi Hsu
- Institute of Emergency and Critical Care Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Respiratory Therapy, Sijhih Cathay General Hospital, New Taipei, Taiwan
| | - Yi-Tsung Lin
- Institute of Emergency and Critical Care Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
- Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Kuo-Chin Kao
- Department of Thoracic Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chung-Kan Peng
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Tri-Service General Hospital, Taipei, Taiwan
| | - Chau-Chyun Sheu
- Division of Pulmonary and Critical Care Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Shinn-Jye Liang
- Division of Pulmonary and Critical Care, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Ming-Cheng Chan
- Department of Critical Care Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Hao-Chien Wang
- Division of Chest Medicine, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Yu-Mu Chen
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Wei-Chih Chen
- Institute of Emergency and Critical Care Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan
- Department of Chest Medicine, Taipei Veterans General Hospital, # 201 Sec. 2, Shih-Pai Road, Taipei, 11217, Taiwan
| | - Kuang-Yao Yang
- Institute of Emergency and Critical Care Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
- School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, 112, Taiwan.
- Department of Chest Medicine, Taipei Veterans General Hospital, # 201 Sec. 2, Shih-Pai Road, Taipei, 11217, Taiwan.
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.
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11
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Liu Y, Cai X, Fang R, Peng S, Luo W, Du X. Future directions in ventilator-induced lung injury associated cognitive impairment: a new sight. Front Physiol 2023; 14:1308252. [PMID: 38164198 PMCID: PMC10757930 DOI: 10.3389/fphys.2023.1308252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/08/2023] [Indexed: 01/03/2024] Open
Abstract
Mechanical ventilation is a widely used short-term life support technique, but an accompanying adverse consequence can be pulmonary damage which is called ventilator-induced lung injury (VILI). Mechanical ventilation can potentially affect the central nervous system and lead to long-term cognitive impairment. In recent years, many studies revealed that VILI, as a common lung injury, may be involved in the central pathogenesis of cognitive impairment by inducing hypoxia, inflammation, and changes in neural pathways. In addition, VILI has received attention in affecting the treatment of cognitive impairment and provides new insights into individualized therapy. The combination of lung protective ventilation and drug therapy can overcome the inevitable problems of poor prognosis from a new perspective. In this review, we summarized VILI and non-VILI factors as risk factors for cognitive impairment and concluded the latest mechanisms. Moreover, we retrospectively explored the role of improving VILI in cognitive impairment treatment. This work contributes to a better understanding of the pathogenesis of VILI-induced cognitive impairment and may provide future direction for the treatment and prognosis of cognitive impairment.
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Affiliation(s)
- Yinuo Liu
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- The Clinical Medical College of Nanchang University, Nanchang, China
| | - Xintong Cai
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
- The Clinical Medical College of Nanchang University, Nanchang, China
| | - Ruiying Fang
- The Clinical Medical College of Nanchang University, Nanchang, China
| | - Shengliang Peng
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wei Luo
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaohong Du
- Department of Anesthesiology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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12
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Sottile PD, Smith B, Moss M, Albers DJ. The Development, Optimization, and Validation of Four Different Machine Learning Algorithms to Identify Ventilator Dyssynchrony. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.11.28.23299134. [PMID: 38076801 PMCID: PMC10705638 DOI: 10.1101/2023.11.28.23299134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
UNLABELLED Invasive mechanical ventilation can worsen lung injury. Ventilator dyssynchrony (VD) may propagate ventilator-induced lung injury (VILI) and is challenging to detect and systematically monitor because each patient takes approximately 25,000 breaths a day yet some types of VD are rare, accounting for less than 1% of all breaths. Therefore, we sought to develop and validate accurate machine learning (ML) algorithms to detect multiple types of VD by leveraging esophageal pressure waveform data to quantify patient effort with airway pressure, flow, and volume data generated during mechanical ventilation, building a computational pipeline to facilitate the study of VD. MATERIALS AND METHODS We collected ventilator waveform and esophageal pressure data from 30 patients admitted to the ICU. Esophageal pressure allows the measurement of transpulmonary pressure and patient effort. Waveform data were cleaned, features considered essential to VD detection were calculated, and a set of 10,000 breaths were manually labeled. Four ML algorithms were trained to classify each type of VD: logistic regression, support vector classification, random forest, and XGBoost. RESULTS We trained ML models to detect different families and seven types of VD with high sensitivity (>90% and >80%, respectively). Three types of VD remained difficult for ML to classify because of their rarity and lack of sample size. XGBoost classified breaths with increased specificity compared to other ML algorithms. DISCUSSION We developed ML models to detect multiple types of VD accurately. The ability to accurately detect multiple VD types addresses one of the significant limitations in understanding the role of VD in affecting patient outcomes. CONCLUSION ML models identify multiple types of VD by utilizing esophageal pressure data and airway pressure, flow, and volume waveforms. The development of such computational pipelines will facilitate the identification of VD in a scalable fashion, allowing for the systematic study of VD and its impact on patient outcomes.
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13
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Damiani LF, Goligher EC. Lung and Diaphragm Protection During Mechanical Ventilation: Synchrony Matters. Crit Care Med 2023; 51:1618-1621. [PMID: 37902352 DOI: 10.1097/ccm.0000000000006013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Affiliation(s)
- L Felipe Damiani
- Departamento Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- CardioREspirAtory Research Laboratory (CREAR), Departamento Ciencias de la Salud, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ewan C Goligher
- Toronto General Hospital Research Institute, Toronto, ON, Canada
- Department of Physiology, University of Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Division of Respirology, Department of Medicine, University Health Network, Toronto, ON, Canada
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14
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Hashimoto H, Yoshida T, Firstiogusran AMF, Taenaka H, Nukiwa R, Koyama Y, Uchiyama A, Fujino Y. Asynchrony Injures Lung and Diaphragm in Acute Respiratory Distress Syndrome. Crit Care Med 2023; 51:e234-e242. [PMID: 37459198 DOI: 10.1097/ccm.0000000000005988] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
OBJECTIVES Patient-ventilator asynchrony is often observed during mechanical ventilation and is associated with higher mortality. We hypothesized that patient-ventilator asynchrony causes lung and diaphragm injury and dysfunction. DESIGN Prospective randomized animal study. SETTING University research laboratory. SUBJECTS Eighteen New Zealand White rabbits. INTERVENTIONS Acute respiratory distress syndrome (ARDS) model was established by depleting surfactants. Each group (assist control, breath stacking, and reverse triggering) was simulated by phrenic nerve stimulation. The effects of each group on lung function, lung injury (wet-to-dry lung weight ratio, total protein, and interleukin-6 in bronchoalveolar lavage), diaphragm function (diaphragm force generation curve), and diaphragm injury (cross-sectional area of diaphragm muscle fibers, histology) were measured. Diaphragm RNA sequencing was performed using breath stacking and assist control ( n = 2 each). MEASUREMENTS AND MAIN RESULTS Inspiratory effort generated by phrenic nerve stimulation was small and similar among groups (esophageal pressure swing ≈ -2.5 cm H 2 O). Breath stacking resulted in the largest tidal volume (>10 mL/kg) and highest inspiratory transpulmonary pressure, leading to worse oxygenation, worse lung compliance, and lung injury. Reverse triggering did not cause lung injury. No asynchrony events were observed in assist control, whereas eccentric contractions occurred in breath stacking and reverse triggering, but more frequently in breath stacking. Breath stacking and reverse triggering significantly reduced diaphragm force generation. Diaphragmatic histology revealed that the area fraction of abnormal muscle was ×2.5 higher in breath stacking (vs assist control) and ×2.1 higher in reverse triggering (vs assist control). Diaphragm RNA sequencing analysis revealed that genes associated with muscle differentiation and contraction were suppressed, whereas cytokine- and chemokine-mediated proinflammatory responses were activated in breath stacking versus assist control. CONCLUSIONS Breath stacking caused lung and diaphragm injury, whereas reverse triggering caused diaphragm injury. Thus, careful monitoring and management of patient-ventilator asynchrony may be important to minimize lung and diaphragm injury from spontaneous breathing in ARDS.
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Affiliation(s)
- Haruka Hashimoto
- All authors: Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine, Osaka University, Suita, Japan
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15
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Núñez Silveira JM, Gallardo A, García-Valdés P, Ríos F, Rodriguez PO, Felipe Damiani L. Reverse triggering during mechanical ventilation: Diagnosis and clinical implications. Med Intensiva 2023; 47:648-657. [PMID: 37867118 DOI: 10.1016/j.medine.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/04/2023] [Accepted: 09/04/2023] [Indexed: 10/24/2023]
Abstract
This review addresses the phenomenon of "reverse triggering", an asynchrony that occurs in deeply sedated patients or patients in transition from deep to light sedation. Reverse triggering has been reported to occur in 30-90% of all ventilated patients. The underlying pathophysiological mechanisms remain unclear, but "entrainment" is proposed as one of them. Detecting this asynchrony is crucial, and methods such as visual inspection, esophageal pressure, diaphragmatic ultrasound and automated methods have been used. Reverse triggering may have effects on lung and diaphragm function, probably mediated by the level of breathing effort and eccentric activation of the diaphragm. The optimal management of reverse triggering has not been established, but may include the adjustment of ventilatory parameters as well as of sedation level, and in extreme cases, neuromuscular block. It is important to understand the significance of this condition and its detection, but also to conduct dedicated research to improve its clinical management and potential effects in critically ill patients.
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Affiliation(s)
- Juan M Núñez Silveira
- Servicio de Kinesiología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Adrián Gallardo
- Servicio de Kinesiología, Sanatorio Clínica Modelo de Morón, Morón, Buenos Aires, Argentina
| | - Patricio García-Valdés
- Departamento de Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; CardioREspirAtory Research Laboratory (CREAR), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Fernando Ríos
- Casa Hospital San Juan De Dios, Ramos Mejía, Buenos Aires, Argentina
| | - Pablo O Rodriguez
- Unidad de Terapia Intensiva, Centro de Educación Médica e Investigaciones Clínicas (CEMIC), Buenos Aires, Argentina; Instituto Universitario CEMIC (IUC), Buenos Aires, Argentina
| | - L Felipe Damiani
- Departamento de Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; CardioREspirAtory Research Laboratory (CREAR), Pontificia Universidad Católica de Chile, Santiago, Chile.
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16
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Gibbs KW, Forbes JL, Harrison KJ, Krall JT, Isenhart AA, Taylor SP, Martin RS, O'Connell NS, Bakhru RN, Palakshappa JA, Files DC. A Pragmatic Pilot Trial Comparing Patient-Triggered Adaptive Pressure Control to Patient-Triggered Volume Control Ventilation in Critically Ill Adults. Respir Care 2023; 68:1331-1339. [PMID: 36944477 PMCID: PMC10506635 DOI: 10.4187/respcare.10803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/14/2023] [Indexed: 03/23/2023]
Abstract
BACKGROUND Patient-triggered adaptive pressure control (APC) continuous mandatory ventilation (CMV) (APC-CMV) has been widely adopted as an alternative ventilator mode to patient-triggered volume control (VC) CMV (VC-CMV). However, the comparative effectiveness of the 2 ventilator modes remains uncertain. We sought to explore clinical and implementation factors pertinent to a future definitive randomized controlled trial assessing APC-CMV versus VC-CMV as an initial ventilator mode strategy. The research objectives in our pilot trial tested clinician adherence and explored clinical outcomes. METHODS In a single-center pragmatic sequential cluster crossover pilot trial, we enrolled all eligible adults with acute respiratory failure requiring mechanical ventilation admitted during a 9-week period to the medical ICU. Two-week time epochs were assigned a priori in which subjects received either APC-CMV or VC-CMV The primary outcome of the trial was feasibility, defined as 80% of subjects receiving the assigned mode within 1 h of initiation of ICU ventilation. The secondary outcome was proportion of the first 24 h on the assigned mode. Finally, we surveyed clinician stakeholders to understand potential facilitators and barriers to conducting a definitive randomized trial. RESULTS We enrolled 137 subjects who received 152 discreet episodes of mechanical ventilation during time epochs assigned to APC-CMV (n = 61) and VC-CMV (n = 91). One hundred and thirty-one episodes were included in the prespecified primary outcome. One hundred and twenty-six (96%) received the assigned mode within the first hour of ICU admission (60 of 61 subjects assigned APC-CMV and 66 of 70 assigned VC-CMV). VC-CMV subjects spent a lower proportion of first 24 h (84% [95% CI 78-89]) on the assigned mode than APC-CMV recipients (95% [95% CI 91-100]). Mixed-methods analyses identified preconceived perceptions of subject comfort by clinicians and need for real-time education to address this concern. CONCLUSIONS In this pilot pragmatic, sequential crossover trial, unit-wide allocation to a ventilator mode was feasible and acceptable to clinicians.
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Affiliation(s)
- Kevin W Gibbs
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina.
| | - Jonathan L Forbes
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Kelsey J Harrison
- Department of Respiratory Care, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - Jennifer Tw Krall
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Aubrae A Isenhart
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Stephanie P Taylor
- Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Department of Internal Medicine, Wake Forest School of Medicine, Charlotte, North Carolina
| | - R Shayn Martin
- Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Department of Surgery, Wake Forest School of Medicine, Winston-Salem, NC, North Carolina
| | - Nathaniel S O'Connell
- Department of Biostatistics and Data Science, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Rita N Bakhru
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Jessica A Palakshappa
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - D Clark Files
- Department of Internal Medicine, Section on Pulmonary, Critical Care, Allergy, and Immunology, Wake Forest School of Medicine, Winston-Salem, North Carolina; and Critical Illness Injury and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina
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Longhini F, Simonte R, Vaschetto R, Navalesi P, Cammarota G. Reverse Triggered Breath during Pressure Support Ventilation and Neurally Adjusted Ventilatory Assist at Increasing Propofol Infusion. J Clin Med 2023; 12:4857. [PMID: 37510970 PMCID: PMC10381884 DOI: 10.3390/jcm12144857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/18/2023] [Accepted: 07/22/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Reverse triggered breath (RTB) has been extensively described during assisted-controlled modes of ventilation. We aimed to assess whether RTB occurs during Pressure Support Ventilation (PSV) and Neurally Adjusted Ventilatory Assist (NAVA) at varying depths of propofol sedation. METHODS This is a retrospective analysis of a prospective crossover randomized controlled trial conducted in an Intensive Care Unit (ICU) of a university hospital. Fourteen intubated patients for acute respiratory failure received six trials of 25 minutes randomly applying PSV and NAVA at three different propofol infusions: awake, light, and deep sedation. We assessed the occurrence of RTBs at each protocol step. The incidence level of RTBs was determined through the RTB index, which was calculated by dividing RTBs by the total number of breaths triggered and not triggered. RESULTS RTBs occurred during both PSV and NAVA. The RTB index was greater during PSV than during NAVA at mild (1.5 [0.0; 5.3]% vs. 0.6 [0.0; 1.1]%) and deep (5.9 [0.7; 9.0]% vs. 1.7 [0.9; 3.5]%) sedation. CONCLUSIONS RTB occurs in patients undergoing assisted mechanical ventilation. The level of propofol sedation and the mode of ventilation may influence the incidence of RTBs.
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Affiliation(s)
- Federico Longhini
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, "Magna Graecia" University, 88100 Catanzaro, Italy
| | - Rachele Simonte
- Division of Anesthesia, Analgesia and Intensive Care, Department of Medicine and Surgery, Hospital S. Maria della Misericordia, University of Perugia, 06123 Perugia, Italy
| | - Rosanna Vaschetto
- Anesthesia and Intensive Care, Department of Translational Medicine, Eastern Piedmont University, 28100 Novara, Italy
| | - Paolo Navalesi
- Anesthesia and Intensive Care, Padua Hospital, Department of Medicine-DIMED, University of Padua, 35128 Padova, Italy
| | - Gianmaria Cammarota
- Anesthesia and Intensive Care, Department of Translational Medicine, Eastern Piedmont University, 28100 Novara, Italy
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Seitz KP, Lloyd BD, Wang L, Shotwell MS, Qian ET, Richardson RK, Rooks JC, Hennings-Williams V, Sandoval CE, Richardson WD, Morgan T, Thompson AN, Hastings PG, Ring TP, Stollings JL, Talbot EM, Krasinski DJ, Decoursey B, Gibbs KW, Self WH, Mixon AS, Rice TW, Semler MW, Casey JD. Protocol and statistical analysis plan for the Mode of Ventilation During Critical IllnEss (MODE) trial. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.07.21.23292998. [PMID: 37546787 PMCID: PMC10402229 DOI: 10.1101/2023.07.21.23292998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Introduction For every critically ill adult receiving invasive mechanical ventilation, clinicians must select a mode of ventilation. The mode of ventilation determines whether the ventilator directly controls the tidal volume or the inspiratory pressure. Newer hybrid modes allow clinicians to set a target tidal volume, for which the ventilator controls and adjusts the inspiratory pressure. A strategy of low tidal volumes and low plateau pressure improves outcomes, but the optimal mode to achieve these targets is not known. Methods and analysis The Mode of Ventilation During Critical Illness (MODE) trial is a cluster-randomized, multiple-crossover pilot trial being conducted in the medical intensive care unit (ICU) at an academic center. The MODE trial compares the use of volume control, pressure control, and adaptive pressure control. The study ICU is assigned to a single ventilator mode (volume control versus pressure control versus adaptive pressure control) for continuous mandatory ventilation during each 1-month study block. The assigned mode switches every month in a randomly generated sequence. The primary outcome is ventilator-free days (VFDs) to study day 28, defined as the number of days alive and free of invasive mechanical ventilation from the final receipt of mechanical ventilation to 28 days after enrollment. Enrollment began November 1, 2022 and will end on July 31, 2023. Ethics and dissemination The trial was approved by the Vanderbilt University Medical Center institutional review board (IRB# 220446). Results of this study will be submitted to a peer-reviewed journal and presented at scientific conferences. Trial registration number The trial was registered with clinicaltrials.gov on October 3, 2022, prior to initiation of patient enrollment on November 1, 2022 (ClinicalTrials.gov identifier: NCT05563779).
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Affiliation(s)
- Kevin P. Seitz
- Vanderbilt University Medical Center, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Nashville, TN
| | - Bradley D. Lloyd
- Vanderbilt University Medical Center, Department of Emergency Medicine, Nashville, TN
| | - Li Wang
- Vanderbilt University Medical Center, Department of Biostatistics, Nashville, TN
| | - Matthew S. Shotwell
- Vanderbilt University Medical Center, Department of Biostatistics, Nashville, TN
| | - Edward T. Qian
- Vanderbilt University Medical Center, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Nashville, TN
| | - Roger K. Richardson
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | - Jeffery C. Rooks
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | | | - Claire E. Sandoval
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | | | - Tracy Morgan
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | - Amber N. Thompson
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | - Pamela G. Hastings
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | - Terry P. Ring
- Vanderbilt University Medical Center, Department of Respiratory Care, Nashville, TN
| | - Joanna L. Stollings
- Vanderbilt University Medical Center, Department of Pharmaceutical Services, Nashville, TN
| | - Erica M. Talbot
- Vanderbilt University Medical Center, Department of Medicine, Nashville, TN
| | - David J. Krasinski
- Vanderbilt University Medical Center, Department of Medicine, Nashville, TN
| | - Bailey Decoursey
- Vanderbilt University Medical Center, Department of Medicine, Nashville, TN
| | - Kevin W. Gibbs
- Section on Pulmonary, Critical Care, Allergy, and immunology, Wake Forest School of Medicine, Winston-Salem, NC
| | - Wesley H. Self
- Vanderbilt University Medical Center, Department of Emergency Medicine, Nashville, TN
- Vanderbilt University Medical Center, Vanderbilt Institute for Clinical and Translational Research, Nashville, TN
| | - Amanda S. Mixon
- Vanderbilt University Medical Center, Department of Medicine, Division of General Internal Medicine and Public Health, Nashville, TN
- VA Tennessee Valley Healthcare System, Geriatric Research, Education, and Clinical Center, Nashville, TN
| | - Todd W. Rice
- Vanderbilt University Medical Center, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Nashville, TN
| | - Matthew W. Semler
- Vanderbilt University Medical Center, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Nashville, TN
| | - Jonathan D. Casey
- Vanderbilt University Medical Center, Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Nashville, TN
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Akoumianaki E, Bolaki M, Prinianakis G, Konstantinou I, Panagiotarakou M, Vaporidi K, Georgopoulos D, Kondili E. Hiccup-like Contractions in Mechanically Ventilated Patients: Individualized Treatment Guided by Transpulmonary Pressure. J Pers Med 2023; 13:984. [PMID: 37373973 DOI: 10.3390/jpm13060984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Hiccups-like contractions, including hiccups, respiratory myoclonus, and diaphragmatic tremor, refer to involuntary, spasmodic, and inspiratory muscle contractions. They have been repeatedly described in mechanically ventilated patients, especially those with central nervous damage. Nevertheless, their effects on patient-ventilator interaction are largely unknown, and even more overlooked is their contribution to lung and diaphragm injury. We describe, for the first time, how the management of hiccup-like contractions was individualized based on esophageal and transpulmonary pressure measurements in three mechanically ventilated patients. The necessity or not of intervention was determined by the effects of these contractions on arterial blood gases, patient-ventilator synchrony, and lung stress. In addition, esophageal pressure permitted the titration of ventilator settings in a patient with hypoxemia and atelectasis secondary to hiccups and in whom sedatives failed to eliminate the contractions and muscle relaxants were contraindicated. This report highlights the importance of esophageal pressure monitoring in the clinical decision making of hiccup-like contractions in mechanically ventilated patients.
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Affiliation(s)
- Evangelia Akoumianaki
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
- School of Medicine, University of Crete, 71003 Heraklion, Greece
| | - Maria Bolaki
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
| | - Georgios Prinianakis
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
| | - Ioannis Konstantinou
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
| | - Meropi Panagiotarakou
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
| | - Katerina Vaporidi
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
- School of Medicine, University of Crete, 71003 Heraklion, Greece
| | | | - Eumorfia Kondili
- Department of Intensive Care Unit, University Hospital of Heraklion, 71110 Crete, Greece
- School of Medicine, University of Crete, 71003 Heraklion, Greece
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20
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Schulz E, Woollam M, Grocki P, Davis MD, Agarwal M. Methods to Detect Volatile Organic Compounds for Breath Biopsy Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry. Molecules 2023; 28:molecules28114533. [PMID: 37299010 DOI: 10.3390/molecules28114533] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/25/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
Volatile organic compounds (VOCs) are byproducts from metabolic pathways that can be detected in exhaled breath and have been reported as biomarkers for different diseases. The gold standard for analysis is gas chromatography-mass spectrometry (GC-MS), which can be coupled with various sampling methods. The current study aims to develop and compare different methods for sampling and preconcentrating VOCs using solid-phase microextraction (SPME). An in-house sampling method, direct-breath SPME (DB-SPME), was developed to directly extract VOCs from breath using a SPME fiber. The method was optimized by exploring different SPME types, the overall exhalation volume, and breath fractionation. DB-SPME was quantitatively compared to two alternative methods involving the collection of breath in a Tedlar bag. In one method, VOCs were directly extracted from the Tedlar bag (Tedlar-SPME) and in the other, the VOCs were cryothermally transferred from the Tedlar bag to a headspace vial (cryotransfer). The methods were verified and quantitatively compared using breath samples (n = 15 for each method respectively) analyzed by GC-MS quadrupole time-of-flight (QTOF) for compounds including but not limited to acetone, isoprene, toluene, limonene, and pinene. The cryotransfer method was the most sensitive, demonstrating the strongest signal for the majority of the VOCs detected in the exhaled breath samples. However, VOCs with low molecular weights, including acetone and isoprene, were detected with the highest sensitivity using the Tedlar-SPME. On the other hand, the DB-SPME was less sensitive, although it was rapid and had the lowest background GC-MS signal. Overall, the three breath-sampling methods can detect a wide variety of VOCs in breath. The cryotransfer method may be optimal when collecting a large number of samples using Tedlar bags, as it allows the long-term storage of VOCs at low temperatures (-80 °C), while Tedlar-SPME may be more effective when targeting relatively small VOCs. The DB-SPME method may be the most efficient when more immediate analyses and results are required.
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Affiliation(s)
- Eray Schulz
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University, Indianapolis, IN 46202, USA
- Integrated Nanosystems Development Institute, Indiana University-Purdue University, Indianapolis, IN 46202, USA
| | - Mark Woollam
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University, Indianapolis, IN 46202, USA
- Integrated Nanosystems Development Institute, Indiana University-Purdue University, Indianapolis, IN 46202, USA
| | - Paul Grocki
- Integrated Nanosystems Development Institute, Indiana University-Purdue University, Indianapolis, IN 46202, USA
| | - Michael D Davis
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Mangilal Agarwal
- Department of Chemistry and Chemical Biology, Indiana University-Purdue University, Indianapolis, IN 46202, USA
- Integrated Nanosystems Development Institute, Indiana University-Purdue University, Indianapolis, IN 46202, USA
- Department of Mechanical & Energy Engineering, Indiana University-Purdue University, Indianapolis, IN 46202, USA
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21
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Baedorf-Kassis EN, Glowala J, Póka KB, Wadehn F, Meyer J, Talmor D. Reverse triggering neural network and rules-based automated detection in acute respiratory distress syndrome. J Crit Care 2023; 75:154256. [PMID: 36701820 PMCID: PMC10173144 DOI: 10.1016/j.jcrc.2023.154256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/21/2022] [Accepted: 01/08/2023] [Indexed: 01/27/2023]
Abstract
PURPOSE Dyssynchrony may cause lung injury and is associated with worse outcomes in mechanically ventilated patients. Reverse triggering (RT) is a common type of dyssynchrony presenting with several phenotypes which may directly cause lung injury and be difficult to identify. Due to these challenges, automated software to assist in identification is needed. MATERIALS AND METHODS This was a prospective observational study using a training set of 15 patients and a validation dataset of 13 patients. RT events were manually identified and compared with "rules-based" programs (with and without esophageal manometry and reverse triggering with breath stacking), and were used to train a neural network artificial intelligence (AI) program. RT phenotypes were identified using previously defined rules. Performance of the programs was compared via sensitivity, specificity, positive predictive value (PPV) and F1 score. RESULTS 33,244 breaths were manually analyzed, with 8718 manually identified as reverse-triggers. The rules-based and AI programs yielded excellent specificity (>95% in all programs) and F1 score (>75% in all programs). RT with breath stacking (24.4%) and mid-cycle RT (37.8%) were the most common phenotypes. CONCLUSIONS Automated detection of RT demonstrated good performance, with the potential application of these programs for research and clinical care.
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Affiliation(s)
- Elias N Baedorf-Kassis
- Division of Pulmonary and Critical Care Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA; Department of Anesthesia, Critical Care and Pain, Beth Israel Deaconess Medical Center, Boston, MA, USA.
| | - Jakub Glowala
- Division of Pulmonary and Critical Care Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | | | | | | | - Daniel Talmor
- Division of Pulmonary and Critical Care Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA; Department of Anesthesia, Critical Care and Pain, Beth Israel Deaconess Medical Center, Boston, MA, USA
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22
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Spinelli E, Pesenti A, Slobod D, Fornari C, Fumagalli R, Grasselli G, Volta CA, Foti G, Navalesi P, Knafelj R, Pelosi P, Mancebo J, Brochard L, Mauri T. Clinical risk factors for increased respiratory drive in intubated hypoxemic patients. Crit Care 2023; 27:138. [PMID: 37041553 PMCID: PMC10088111 DOI: 10.1186/s13054-023-04402-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 03/14/2023] [Indexed: 04/13/2023] Open
Abstract
BACKGROUND There is very limited evidence identifying factors that increase respiratory drive in hypoxemic intubated patients. Most physiological determinants of respiratory drive cannot be directly assessed at the bedside (e.g., neural inputs from chemo- or mechano-receptors), but clinical risk factors commonly measured in intubated patients could be correlated with increased drive. We aimed to identify clinical risk factors independently associated with increased respiratory drive in intubated hypoxemic patients. METHODS We analyzed the physiological dataset from a multicenter trial on intubated hypoxemic patients on pressure support (PS). Patients with simultaneous assessment of the inspiratory drop in airway pressure at 0.1-s during an occlusion (P0.1) and risk factors for increased respiratory drive on day 1 were included. We evaluated the independent correlation of the following clinical risk factors for increased drive with P0.1: severity of lung injury (unilateral vs. bilateral pulmonary infiltrates, PaO2/FiO2, ventilatory ratio); arterial blood gases (PaO2, PaCO2 and pHa); sedation (RASS score and drug type); SOFA score; arterial lactate; ventilation settings (PEEP, level of PS, addition of sigh breaths). RESULTS Two-hundred seventeen patients were included. Clinical risk factors independently correlated with higher P0.1 were bilateral infiltrates (increase ratio [IR] 1.233, 95%CI 1.047-1.451, p = 0.012); lower PaO2/FiO2 (IR 0.998, 95%CI 0.997-0.999, p = 0.004); higher ventilatory ratio (IR 1.538, 95%CI 1.267-1.867, p < 0.001); lower pHa (IR 0.104, 95%CI 0.024-0.464, p = 0.003). Higher PEEP was correlated with lower P0.1 (IR 0.951, 95%CI 0.921-0.982, p = 0.002), while sedation depth and drugs were not associated with P0.1. CONCLUSIONS Independent clinical risk factors for higher respiratory drive in intubated hypoxemic patients include the extent of lung edema and of ventilation-perfusion mismatch, lower pHa, and lower PEEP, while sedation strategy does not affect drive. These data underline the multifactorial nature of increased respiratory drive.
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Affiliation(s)
- Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Antonio Pesenti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Douglas Slobod
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Critical Care Medicine, McGill University, Montreal, QC, Canada
| | - Carla Fornari
- Research Centre On Public Health, University of Milano - Bicocca, Monza, Italy
| | - Roberto Fumagalli
- Anesthesia and Critical Care Service 1, Niguarda Hospital, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Carlo Alberto Volta
- Morphology, Surgery and Experimental Medicine, Anesthesia and Intensive Care Unit, University of Ferrara, Ferrara, Italy
| | - Giuseppe Foti
- Anesthesia and Critical Care, San Gerardo Hospital, ASST Monza, Monza, Italy
| | - Paolo Navalesi
- Anesthesia and Intensive Care, Department of Medicine - DIMED, Padua University Hospital, University of Padua, Padua, Italy
| | - Rihard Knafelj
- Center for Internal Intensive Medicine (MICU), University Medical Center Ljubljana, Ljubljana, Slovenia
| | - Paolo Pelosi
- Anesthesia and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
| | - Jordi Mancebo
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
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23
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Santana PV, Cardenas LZ, de Albuquerque ALP. Diaphragm Ultrasound in Critically Ill Patients on Mechanical Ventilation—Evolving Concepts. Diagnostics (Basel) 2023; 13:diagnostics13061116. [PMID: 36980423 PMCID: PMC10046995 DOI: 10.3390/diagnostics13061116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/11/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023] Open
Abstract
Mechanical ventilation (MV) is a life-saving respiratory support therapy, but MV can lead to diaphragm muscle injury (myotrauma) and induce diaphragmatic dysfunction (DD). DD is relevant because it is highly prevalent and associated with significant adverse outcomes, including prolonged ventilation, weaning failures, and mortality. The main mechanisms involved in the occurrence of myotrauma are associated with inadequate MV support in adapting to the patient’s respiratory effort (over- and under-assistance) and as a result of patient-ventilator asynchrony (PVA). The recognition of these mechanisms associated with myotrauma forced the development of myotrauma prevention strategies (MV with diaphragm protection), mainly based on titration of appropriate levels of inspiratory effort (to avoid over- and under-assistance) and to avoid PVA. Protecting the diaphragm during MV therefore requires the use of tools to monitor diaphragmatic effort and detect PVA. Diaphragm ultrasound is a non-invasive technique that can be used to monitor diaphragm function, to assess PVA, and potentially help to define diaphragmatic effort with protective ventilation. This review aims to provide clinicians with an overview of the relevance of DD and the main mechanisms underlying myotrauma, as well as the most current strategies aimed at minimizing the occurrence of myotrauma with special emphasis on the role of ultrasound in monitoring diaphragm function.
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Affiliation(s)
- Pauliane Vieira Santana
- Intensive Care Unit, AC Camargo Cancer Center, São Paulo 01509-011, Brazil
- Correspondence: (P.V.S.); (A.L.P.d.A.)
| | - Letícia Zumpano Cardenas
- Intensive Care Unit, Physical Therapy Department, AC Camargo Cancer Center, São Paulo 01509-011, Brazil
| | - Andre Luis Pereira de Albuquerque
- Pulmonary Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil
- Sírio-Libanês Teaching and Research Institute, Hospital Sírio Libanês, São Paulo 01308-060, Brazil
- Correspondence: (P.V.S.); (A.L.P.d.A.)
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Lim MJ, Lakshminrusimha S, Hedriana H, Albertson T. Pregnancy and Severe ARDS with COVID-19: Epidemiology, Diagnosis, Outcomes and Treatment. Semin Fetal Neonatal Med 2023; 28:101426. [PMID: 36964118 PMCID: PMC9990893 DOI: 10.1016/j.siny.2023.101426] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Pregnancy-related acute respiratory distress syndrome (ARDS) is fast becoming a growing and clinically relevant subgroup of ARDS amidst global outbreaks of various viral respiratory pathogens that include H1N1-influenza, severe acute respiratory syndrome (SARS), middle east respiratory syndrome (MERS), and the most recent COVID-19 pandemic. Pregnancy is a risk factor for severe viral-induced ARDS and commonly associated with poor maternal and fetal outcomes including fetal growth-restriction, preterm birth, and spontaneous abortion. Physiologic changes of pregnancy further compounded by mechanical and immunologic alterations are theorized to impact the development of ARDS from viral pneumonia. The COVID-19 sub-phenotype of ARDS share overlapping molecular features of maternal pathogenicity of pregnancy with respect to immune-dysregulation and endothelial/microvascular injury (i.e., preeclampsia) that may in part explain a trend toward poor maternal and fetal outcomes seen with severe COVID-19 maternal infections. To date, current ARDS diagnostic criteria and treatment management fail to include and consider physiologic adaptations that are unique to maternal physiology of pregnancy and consideration of maternal-fetal interactions. Treatment focused on lung-protective ventilation strategies have been shown to improve clinical outcomes in adults with ARDS but may have adverse maternal-fetal interactions when applied in pregnancy-related ARDS. No specific pharmacotherapy has been identified to improve outcomes in pregnancy with ARDS. Adjunctive therapies aimed at immune-modulation and anti-viral treatment with COVID-19 infection during pregnancy have been reported but data in regard to its efficacy and safety is currently lacking.
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Affiliation(s)
- Michelle J Lim
- UC Davis School of Medicine, UC Davis Children's Hospital, Department of Pediatrics, Division of Critical Care and Neonatology, Sacramento, CA, USA.
| | - Satyan Lakshminrusimha
- UC Davis School of Medicine, UC Davis Children's Hospital, Department of Pediatrics, Division of Critical Care and Neonatology, Sacramento, CA, USA
| | - Herman Hedriana
- UC Davis School of Medicine, UC Davis Medical Center, Department of Obstetrics and Gynecology, Sacramento, CA, USA
| | - Timothy Albertson
- UC Davis School of Medicine, UC Davis Medical Center, Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Sacramento, CA, USA
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Driving Pressure, Elastance, and Outcomes in a Real-World Setting: A Bi-Center Analysis of Electronic Health Record Data. Crit Care Explor 2023; 5:e0877. [PMID: 36861047 PMCID: PMC9970281 DOI: 10.1097/cce.0000000000000877] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
Emerging evidence suggests the potential importance of inspiratory driving pressure (DP) and respiratory system elastance (ERS) on outcomes among patients with the acute respiratory distress syndrome. Their association with outcomes among heterogeneous populations outside of a controlled clinical trial is underexplored. We used electronic health record (EHR) data to characterize the associations of DP and ERS with clinical outcomes in a real-world heterogenous population. DESIGN Observational cohort study. SETTING Fourteen ICUs in two quaternary academic medical centers. PATIENTS Adult patients who received mechanical ventilation for more than 48 hours and less than 30 days. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS EHR data from 4,233 ventilated patients from 2016 to 2018 were extracted, harmonized, and merged. A minority of the analytic cohort (37%) experienced a Pao2/Fio2 of less than 300. A time-weighted mean exposure was calculated for ventilatory variables including tidal volume (VT), plateau pressures (PPLAT), DP, and ERS. Lung-protective ventilation adherence was high (94% with VT < 8.5 mL/kg, time-weighted mean VT = 6. 8 mL/kg, 88% with PPLAT ≤ 30 cm H2O). Although time-weighted mean DP (12.2 cm H2O) and ERS (1.9 cm H2O/[mL/kg]) were modest, 29% and 39% of the cohort experienced a DP greater than 15 cm H2O or an ERS greater than 2 cm H2O/(mL/kg), respectively. Regression modeling with adjustment for relevant covariates determined that exposure to time-weighted mean DP (> 15 cm H2O) was associated with increased adjusted risk of mortality and reduced adjusted ventilator-free days independent of adherence to lung-protective ventilation. Similarly, exposure to time-weighted mean ERS greater than 2 cm H2O/(mL/kg) was associated with increased adjusted risk of mortality. CONCLUSIONS Elevated DP and ERS are associated with increased risk of mortality among ventilated patients independent of severity of illness or oxygenation impairment. EHR data can enable assessment of time-weighted ventilator variables and their association with clinical outcomes in a multicenter real-world setting.
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Establishment and Application of a Patient-Ventilator Asynchrony Remote Network Platform for ICU Mechanical Ventilation: A Retrospective Study. J Clin Med 2023; 12:jcm12041570. [PMID: 36836113 PMCID: PMC9960909 DOI: 10.3390/jcm12041570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/10/2023] [Accepted: 02/12/2023] [Indexed: 02/18/2023] Open
Abstract
BACKGROUND In the process of mechanical ventilation, the problem of patient-ventilator asynchrony (PVA) is faced. This study proposes a self-developed remote mechanical ventilation visualization network system to solve the PVA problem. METHOD The algorithm model proposed in this study builds a remote network platform and achieves good results in the identification of ineffective triggering and double triggering abnormalities in mechanical ventilation. RESULT The algorithm has a sensitivity recognition rate of 79.89% and a specificity of 94.37%. The sensitivity recognition rate of the trigger anomaly algorithm was as high as 67.17%, and the specificity was 99.92%. CONCLUSIONS The asynchrony index was defined to monitor the patient's PVA. The system analyzes real-time transmission of respiratory data, identifies double triggering, ineffective triggering, and other anomalies through the constructed algorithm model, and outputs abnormal alarms, data analysis reports, and data visualizations to assist or guide physicians in handling abnormalities, which is expected to improve patients' breathing conditions and prognosis.
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27
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Roshdy A. Respiratory Monitoring During Mechanical Ventilation: The Present and the Future. J Intensive Care Med 2023; 38:407-417. [PMID: 36734248 DOI: 10.1177/08850666231153371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The increased application of mechanical ventilation, the recognition of its harms and the interest in individualization raised the need for an effective monitoring. An increasing number of monitoring tools and modalities were introduced over the past 2 decades with growing insight into asynchrony, lung and chest wall mechanics, respiratory effort and drive. They should be used in a complementary rather than a standalone way. A sound strategy can guide a reduction in adverse effects like ventilator-induced lung injury, ventilator-induced diaphragm dysfunction, patient-ventilator asynchrony and helps early weaning from the ventilator. However, the diversity, complexity, lack of expertise, and associated cost make formulating the appropriate monitoring strategy a challenge for clinicians. Most often, a big amount of data is fed to the clinicians making interpretation difficult. Therefore, it is fundamental for intensivists to be aware of the principle, advantages, and limits of each tool. This analytic review includes a simplified narrative of the commonly used basic and advanced respiratory monitors along with their limits and future prospective.
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Affiliation(s)
- Ashraf Roshdy
- Critical Care Medicine Department, Faculty of Medicine, 54562Alexandria University, Alexandria, Egypt.,Critical Care Unit, North Middlesex University Hospital, London, UK
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28
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Tsolaki V, Zakynthinos GE, Papadonta ME, Bardaka F, Fotakopoulos G, Pantazopoulos I, Makris D, Zakynthinos E. Neuromuscular Blockade in the Pre- and COVID-19 ARDS Patients. J Pers Med 2022; 12:jpm12091538. [PMID: 36143323 PMCID: PMC9504585 DOI: 10.3390/jpm12091538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/03/2022] [Accepted: 09/15/2022] [Indexed: 11/24/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) accounts for a quarter of mechanically ventilated patients, while during the pandemic, it overwhelmed the capacity of intensive care units (ICUs). Lung protective ventilation (low tidal volume, positive-end expiratory pressure titrated to lung mechanics and oxygenation, permissive hypercapnia) is a non-pharmacological approach that is the gold standard of management. Among the pharmacological treatments, the use of neuromuscular blocking agents (NMBAs), although extensively studied, has not yet been well clarified. The rationale is to minimize the risk for lung damage progression, in the already-injured pulmonary parenchyma. By abolishing rigorous spontaneous efforts, NMBAs may decrease the generation of high transpulmonary pressures that could aggravate patients’ self-inflicted lung injury. Moreover, NMBAs can harmonize the patient–ventilator interaction. Recent randomized controlled trials reported contradictory results and changed the clinical practice in a bidirectional way. NMBAs have not been documented to improve long-term survival; thus, the current guidance suggests their use only in patients in whom a lung protective ventilation protocol cannot be applied, due to asynchrony or increased respiratory efforts. In the present review, we discuss the published data and additionally the clinical practice in the “war” conditions of the COVID-19 pandemic, concerning NMBA use in the management of patients with ARDS.
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Affiliation(s)
- Vasiliki Tsolaki
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
- Correspondence: ; Tel.: +30-2413502964
| | - George E. Zakynthinos
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
- Third Department of Cardiology, Sotiria General Hospital, 11527 Athens, Greece
| | - Maria-Eirini Papadonta
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Fotini Bardaka
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - George Fotakopoulos
- Neurosurgical Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Ioannis Pantazopoulos
- Emergency Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Demosthenes Makris
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Epaminondas Zakynthinos
- Critical Care Department, University Hospital of Larissa, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
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Zochios V, Brodie D, Shekar K, Schultz MJ, Parhar KKS. Invasive mechanical ventilation in patients with acute respiratory distress syndrome receiving extracorporeal support: a narrative review of strategies to mitigate lung injury. Anaesthesia 2022; 77:1137-1151. [PMID: 35864561 DOI: 10.1111/anae.15806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2022] [Indexed: 11/28/2022]
Abstract
Veno-venous extracorporeal membrane oxygenation is indicated in patients with acute respiratory distress syndrome and severely impaired gas exchange despite evidence-based lung protective ventilation, prone positioning and other parts of the standard algorithm for treating such patients. Extracorporeal support can facilitate ultra-lung-protective ventilation, meaning even lower volumes and pressures than standard lung-protective ventilation, by directly removing carbon dioxide in patients needing injurious ventilator settings to maintain sufficient gas exchange. Injurious ventilation results in ventilator-induced lung injury, which is one of the main determinants of mortality in acute respiratory distress syndrome. Marked reductions in the intensity of ventilation to the lowest tolerable levels under extracorporeal support may be achieved and could thereby potentially mitigate ventilator-induced lung injury and theoretically patient self-inflicted lung injury in spontaneously breathing patients with high respiratory drive. However, the benefits of this strategy may be counterbalanced by the use of continuous deep sedation and even neuromuscular blocking drugs, which may impair physical rehabilitation and impact long-term outcomes. There are currently a lack of large-scale prospective data to inform optimal invasive ventilation practices and how to best apply a holistic approach to patients receiving veno-venous extracorporeal membrane oxygenation, while minimising ventilator-induced and patient self-inflicted lung injury. We aimed to review the literature relating to invasive ventilation strategies in patients with acute respiratory distress syndrome receiving extracorporeal support and discuss personalised ventilation approaches and the potential role of adjunctive therapies in facilitating lung protection.
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Affiliation(s)
- V Zochios
- Department of Cardiothoracic Critical Care Medicine and ECMO, Glenfield Hospital, University Hospitals of Leicester National Health Service Trust, Leicester, UK.,Department of Cardiovascular Sciences, University of Leicester, UK
| | - D Brodie
- Columbia University College of Physicians and Surgeons, New York, NY, USA.,Centre for Acute Respiratory Failure, New York-Presbyterian Hospital, New York, NY, USA
| | - K Shekar
- Adult Intensive Care Services and Critical Care Research Group, The Prince Charles Hospital, Brisbane, QLD, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia.,Faculty of Medicine, University of Queensland, Brisbane and Bond University, Goldcoast, QLD, Australia
| | - M J Schultz
- Department of Intensive Care, Amsterdam University Medical Centres, Amsterdam, the Netherlands.,Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand.,Nuffield Department of Medicine, Oxford University, Oxford, UK.,Department of Medical Affairs, Hamilton Medical AG, Bonaduz, Switzerland
| | - K K S Parhar
- Department of Critical Care Medicine, University of Calgary and Alberta Health Services, Calgary, AB, Canada
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Fior G, Colon ZFV, Peek GJ, Fraser JF. Mechanical Ventilation during ECMO: Lessons from Clinical Trials and Future Prospects. Semin Respir Crit Care Med 2022; 43:417-425. [PMID: 35760300 DOI: 10.1055/s-0042-1749450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Acute Respiratory Distress Syndrome (ARDS) accounts for 10% of ICU admissions and affects 3 million patients each year. Despite decades of research, it is still associated with one of the highest mortality rates in the critically ill. Advances in supportive care, innovations in technologies and insights from recent clinical trials have contributed to improved outcomes and a renewed interest in the scope and use of Extracorporeal life support (ECLS) as a treatment for severe ARDS, including high flow veno-venous Extracorporeal Membrane Oxygenation (VV-ECMO) and low flow Extracorporeal Carbon Dioxide Removal (ECCO2R). The rationale being that extracorporeal gas exchange allows the use of lung protective ventilator settings, thereby minimizing ventilator-induced lung injury (VILI). Ventilation strategies are adapted to the patient's condition during the different stages of ECMO support. Several areas in the management of mechanical ventilation in patients on ECMO, such as the best ventilator mode, extubation-decannulation sequence and tracheostomy timing, are tailored to the patients' recovery. Reduction in sedation allowing mobilization, nutrition and early rehabilitation are subsequent therapeutic goals after lung rest has been achieved.
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Affiliation(s)
- Gabriele Fior
- Critical Care Research Group, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Zasha F Vazquez Colon
- Department of Pediatrics, Division of Pediatric Critical Care, University of Florida, Shands Children's Hospital, Gainesville, Florida
| | - Giles J Peek
- Department of Surgery, Congenital Heart Center, Shands Children's Hospital, Gainesville, University of Florida, Gainesville, Florida
| | - John F Fraser
- Critical Care Research Group, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia.,Intensive Care Unit, St Andrew's War Memorial Hospital and The Wesley Hospital, Uniting Care Hospitals, Brisbane, QLD, Australia
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31
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Graf PT, Boesing C, Brumm I, Biehler J, Müller KW, Thiel M, Pelosi P, Rocco PRM, Luecke T, Krebs J. Ultraprotective versus apneic ventilation in acute respiratory distress syndrome patients with extracorporeal membrane oxygenation: a physiological study. J Intensive Care 2022; 10:12. [PMID: 35256012 PMCID: PMC8900404 DOI: 10.1186/s40560-022-00604-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 02/27/2022] [Indexed: 11/15/2022] Open
Abstract
Background Even an ultraprotective ventilation strategy in severe acute respiratory distress syndrome (ARDS) patients treated with extracorporeal membrane oxygenation (ECMO) might induce ventilator-induced lung injury and apneic ventilation with the sole application of positive end-expiratory pressure may, therefore, be an alternative ventilation strategy. We, therefore, compared the effects of ultraprotective ventilation with apneic ventilation on oxygenation, oxygen delivery, respiratory system mechanics, hemodynamics, strain, air distribution and recruitment of the lung parenchyma in ARDS patients with ECMO. Methods In a prospective, monocentric physiological study, 24 patients with severe ARDS managed with ECMO were ventilated using ultraprotective ventilation (tidal volume 3 ml/kg of predicted body weight) with a fraction of inspired oxygen (FiO2) of 21%, 50% and 90%. Patients were then treated with apneic ventilation with analogous FiO2. The primary endpoint was the effect of the ventilation strategy on oxygenation and oxygen delivery. The secondary endpoints were mechanical power, stress, regional air distribution, lung recruitment and the resulting strain, evaluated by chest computed tomography, associated with the application of PEEP (apneic ventilation) and/or low VT (ultraprotective ventilation). Results Protective ventilation, compared to apneic ventilation, improved oxygenation (arterial partial pressure of oxygen, p < 0.001 with FiO2 of 50% and 90%) and reduced cardiac output. Both ventilation strategies preserved oxygen delivery independent of the FiO2. Protective ventilation increased driving pressure, stress, strain, mechanical power, as well as induced additional recruitment in the non-dependent lung compared to apneic ventilation. Conclusions In patients with severe ARDS managed with ECMO, ultraprotective ventilation compared to apneic ventilation improved oxygenation, but increased stress, strain, and mechanical power. Apneic ventilation might be considered as one of the options in the initial phase of ECMO treatment in severe ARDS patients to facilitate lung rest and prevent ventilator-induced lung injury. Trial registration: German Clinical Trials Register (DRKS00013967). Registered 02/09/2018. https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00013967. Supplementary Information The online version contains supplementary material available at 10.1186/s40560-022-00604-9.
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The Effect of Clusters of Double Triggering and Ineffective Efforts in Critically Ill Patients. Crit Care Med 2022; 50:e619-e629. [PMID: 35120043 DOI: 10.1097/ccm.0000000000005471] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To characterize clusters of double triggering and ineffective inspiratory efforts throughout mechanical ventilation and investigate their associations with mortality and duration of ICU stay and mechanical ventilation. DESIGN Registry-based, real-world study. BACKGROUND Asynchronies during invasive mechanical ventilation can occur as isolated events or in clusters and might be related to clinical outcomes. SUBJECTS Adults requiring mechanical ventilation greater than 24 hours for whom greater than or equal to 70% of ventilator waveforms were available. INTERVENTIONS We identified clusters of double triggering and ineffective inspiratory efforts and determined their power and duration. We used Fine-Gray's competing risk model to analyze their effects on mortality and generalized linear models to analyze their effects on duration of mechanical ventilation and ICU stay. MEASUREMENTS AND MAIN RESULTS We analyzed 58,625,796 breaths from 180 patients. All patients had clusters (mean/d, 8.2 [5.4-10.6]; mean power, 54.5 [29.6-111.4]; mean duration, 20.3 min [12.2-34.9 min]). Clusters were less frequent during the first 48 hours (5.5 [2.5-10] vs 7.6 [4.4-9.9] in the remaining period [p = 0.027]). Total number of clusters/d was positively associated with the probability of being discharged alive considering the total period of mechanical ventilation (p = 0.001). Power and duration were similar in the two periods. Power was associated with the probability of being discharged dead (p = 0.03), longer mechanical ventilation (p < 0.001), and longer ICU stay (p = 0.035); cluster duration was associated with longer ICU stay (p = 0.027). CONCLUSIONS Clusters of double triggering and ineffective inspiratory efforts are common. Although higher numbers of clusters might indicate better chances of survival, clusters with greater power and duration indicate a risk of worse clinical outcomes.
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33
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Derdak S. Extracorporeal Carbon Dioxide Removal vs Standard Care Ventilation Effect on 90-Day Mortality in Patients With Acute Hypoxemic Respiratory Failure. JAMA 2022; 327:82. [PMID: 34982124 DOI: 10.1001/jama.2021.21002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Stephen Derdak
- Adult ECMO Program, University of Texas Health Science Center at San Antonio
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34
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Discordance Between Respiratory Drive and Sedation Depth in Critically Ill Patients Receiving Mechanical Ventilation. Crit Care Med 2021; 49:2090-2101. [PMID: 34115638 PMCID: PMC8602777 DOI: 10.1097/ccm.0000000000005113] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES In mechanically ventilated patients, deep sedation is often assumed to induce "respirolysis," that is, lyse spontaneous respiratory effort, whereas light sedation is often assumed to preserve spontaneous effort. This study was conducted to determine validity of these common assumptions, evaluating the association of respiratory drive with sedation depth and ventilator-free days in acute respiratory failure. DESIGN Prospective cohort study. SETTING Patients were enrolled during 2 month-long periods in 2016-2017 from five ICUs representing medical, surgical, and cardiac specialties at a U.S. academic hospital. PATIENTS Eligible patients were critically ill adults receiving invasive ventilation initiated no more than 36 hours before enrollment. Patients with neuromuscular disease compromising respiratory function or expiratory flow limitation were excluded. INTERVENTIONS Respiratory drive was measured via P0.1, the change in airway pressure during a 0.1-second airway occlusion at initiation of patient inspiratory effort, every 12 ± 3 hours for 3 days. Sedation depth was evaluated via the Richmond Agitation-Sedation Scale. Analyses evaluated the association of P0.1 with Richmond Agitation-Sedation Scale (primary outcome) and ventilator-free days. MEASUREMENTS AND MAIN RESULTS Fifty-six patients undergoing 197 bedside evaluations across five ICUs were included. P0.1 ranged between 0 and 13.3 cm H2O (median [interquartile range], 0.1 cm H2O [0.0-1.3 cm H2O]). P0.1 was not significantly correlated with the Richmond Agitation-Sedation Scale (RSpearman, 0.02; 95% CI, -0.12 to 0.16; p = 0.80). Considering P0.1 terciles (range less than 0.2, 0.2-1.0, and greater than 1.0 cm H2O), patients in the middle tercile had significantly more ventilator-free days than the lowest tercile (incidence rate ratio, 0.78; 95% CI, 0.65-0.93; p < 0.01) or highest tercile (incidence rate ratio, 0.58; 95% CI, 0.48-0.70; p < 0.01). CONCLUSIONS Sedation depth is not a reliable marker of respiratory drive during critical illness. Respiratory drive can be low, moderate, or high across the range of routinely targeted sedation depth.
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35
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Frequency and Risk Factors for Reverse Triggering in Pediatric Acute Respiratory Distress Syndrome during Synchronized Intermittent Mandatory Ventilation. Ann Am Thorac Soc 2021; 18:820-829. [PMID: 33326335 DOI: 10.1513/annalsats.202008-1072oc] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rationale: Reverse triggering (RT) occurs when respiratory effort begins after a mandatory breath is initiated by the ventilator. RT may exacerbate ventilator-induced lung injury and lead to breath stacking.Objectives: We sought to describe the frequency and risk factors for RT among patients with acute respiratory distress syndrome (ARDS) and identify risk factors for breath stacking.Methods: We performed a secondary analysis of physiologic data from children on synchronized intermittent mandatory pressure-controlled ventilation enrolled in a single-center randomized controlled trial for ARDS. When children had a spontaneous effort on esophageal manometry, waveforms were recorded and independently analyzed by two investigators to identify RT.Results: We included 81,990 breaths from 100 patient-days and 36 patients. Overall, 2.46% of breaths were RTs, occurring in 15/36 patients (41.6%). A higher tidal volume and a minimal difference between neural respiratory rate and set ventilator rate were independently associated with RT (P = 0.001) in multivariable modeling. Breath stacking occurred in 534 (26.5%) of 2,017 RT breaths and in 14 (93.3%) of 15 patients with RT. In multivariable modeling, breath stacking was more likely to occur when total airway Δpressure (peak inspiratory pressure - positive end-expiratory pressure [PEEP]) at the time patient effort began, peak inspiratory pressure, PEEP, and Δpressure were lower and when patient effort started well after the ventilator-initiated breath (higher phase angle) (all P < 0.05). Together, these parameters were highly predictive of breath stacking (area under the curve, 0.979).Conclusions: Patients with higher tidal volume who have a set ventilator rate close to their spontaneous respiratory rate are more likely to have RT, which results in breath stacking >25% of the time.Clinical trial registered with ClinicalTrials.gov (NCT03266016).
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Kyo M, Shimatani T, Hosokawa K, Taito S, Kataoka Y, Ohshimo S, Shime N. Patient-ventilator asynchrony, impact on clinical outcomes and effectiveness of interventions: a systematic review and meta-analysis. J Intensive Care 2021; 9:50. [PMID: 34399855 PMCID: PMC8365272 DOI: 10.1186/s40560-021-00565-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 08/03/2021] [Indexed: 12/16/2022] Open
Abstract
Background Patient–ventilator asynchrony (PVA) is a common problem in patients undergoing invasive mechanical ventilation (MV) in the intensive care unit (ICU), and may accelerate lung injury and diaphragm mis-contraction. The impact of PVA on clinical outcomes has not been systematically evaluated. Effective interventions (except for closed-loop ventilation) for reducing PVA are not well established. Methods We performed a systematic review and meta-analysis to investigate the impact of PVA on clinical outcomes in patients undergoing MV (Part A) and the effectiveness of interventions for patients undergoing MV except for closed-loop ventilation (Part B). We searched the Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, ClinicalTrials.gov, and WHO-ICTRP until August 2020. In Part A, we defined asynchrony index (AI) ≥ 10 or ineffective triggering index (ITI) ≥ 10 as high PVA. We compared patients having high PVA with those having low PVA. Results Eight studies in Part A and eight trials in Part B fulfilled the eligibility criteria. In Part A, five studies were related to the AI and three studies were related to the ITI. High PVA may be associated with longer duration of mechanical ventilation (mean difference, 5.16 days; 95% confidence interval [CI], 2.38 to 7.94; n = 8; certainty of evidence [CoE], low), higher ICU mortality (odds ratio [OR], 2.73; 95% CI 1.76 to 4.24; n = 6; CoE, low), and higher hospital mortality (OR, 1.94; 95% CI 1.14 to 3.30; n = 5; CoE, low). In Part B, interventions involving MV mode, tidal volume, and pressure-support level were associated with reduced PVA. Sedation protocol, sedation depth, and sedation with dexmedetomidine rather than propofol were also associated with reduced PVA. Conclusions PVA may be associated with longer MV duration, higher ICU mortality, and higher hospital mortality. Physicians may consider monitoring PVA and adjusting ventilator settings and sedatives to reduce PVA. Further studies with adjustment for confounding factors are warranted to determine the impact of PVA on clinical outcomes. Trial registration protocols.io (URL: https://www.protocols.io/view/the-impact-of-patient-ventilator-asynchrony-in-adu-bsqtndwn, 08/27/2020). Supplementary Information The online version contains supplementary material available at 10.1186/s40560-021-00565-5.
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Affiliation(s)
- Michihito Kyo
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Tatsutoshi Shimatani
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan
| | - Koji Hosokawa
- Department of Anesthesiology and Reanimatology, Faculty of Medicine Sciences, University of Fukui, 23-3 Eiheijicho, Yoshidagun, Fukui, 910-1193, Japan
| | - Shunsuke Taito
- Division of Rehabilitation, Department of Clinical Practice and Support, Hiroshima University Hospital, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan.,Systematic Review Workshop Peer Support Group (SRWS-PSG), Osaka, Japan
| | - Yuki Kataoka
- Department of Internal Medicine, Kyoto Min-Iren Asukai Hospital, Tanaka Asukai-cho 89, Sakyo-ku, Kyoto, 606-8226, Japan.,Systematic Review Workshop Peer Support Group (SRWS-PSG), Osaka, Japan.,Section of Clinical Epidemiology, Department of Community Medicine, Kyoto University Graduate School of Medicine, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.,Department of Healthcare Epidemiology, Graduate School of Medicine and Public Health, Kyoto University, Yoshida Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinichiro Ohshimo
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan
| | - Nobuaki Shime
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan
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37
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Beitler JR, Walkey AJ. The Staying Power of Pressure- and Volume-limited Ventilation in Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med 2021; 204:247-249. [PMID: 33891827 PMCID: PMC8513579 DOI: 10.1164/rccm.202104-0839ed] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Jeremy R Beitler
- Center for Acute Respiratory Failure and.,Division of Pulmonary and Critical Care Medicine Columbia University and New York-Presbyterian Hospital New York, New York
| | - Allan J Walkey
- Department of Medicine Boston University School of Medicine Boston, Massachusetts
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Khan YA, Fan E, Ferguson ND. Precision Medicine and Heterogeneity of Treatment Effect in Therapies for Acute Respiratory Distress Syndrome. Chest 2021; 160:1729-1738. [PMID: 34270967 PMCID: PMC8277554 DOI: 10.1016/j.chest.2021.07.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/28/2021] [Accepted: 07/05/2021] [Indexed: 12/16/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a clinically heterogenous syndrome, rather than a distinct disease. This heterogeneity at least partially explains the difficulty in studying treatments for these patients and contributes to the numerous trials of therapies for the syndrome that have not shown benefit. Recent studies have identified different subphenotypes within the heterogenous patient population. These different subphenotypes likely have variable clinical responses to specific therapies, a concept known as heterogeneity of treatment effect (HTE). Recognizing different subphenotypes and HTE has important implications for the clinical management of patients with ARDS. In this review, we will present studies that have identified different subphenotypes and discuss how they can modify the effects of therapies evaluated in trials that are commonly considered to have demonstrated no overall benefit in patients with ARDS.
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Affiliation(s)
- Yasin A Khan
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada; Toronto General Hospital Research Institute, Toronto, Canada; Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Medicine, University of Toronto, Toronto, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada; Toronto General Hospital Research Institute, Toronto, Canada; Department of Physiology, University of Toronto, Toronto, Canada; Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada.
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39
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Kuriyama A, Jackson JL. Neuromuscular blocking agents for acute respiratory distress syndrome. Hippokratia 2021. [DOI: 10.1002/14651858.cd014693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Akira Kuriyama
- Emergency and Critical Care Center; Kurashiki Central Hospital; Kurashiki Japan
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Carteaux G, Parfait M, Combet M, Haudebourg AF, Tuffet S, Mekontso Dessap A. Patient-Self Inflicted Lung Injury: A Practical Review. J Clin Med 2021; 10:jcm10122738. [PMID: 34205783 PMCID: PMC8234933 DOI: 10.3390/jcm10122738] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/15/2021] [Accepted: 06/19/2021] [Indexed: 12/14/2022] Open
Abstract
Patients with severe lung injury usually have a high respiratory drive, resulting in intense inspiratory effort that may even worsen lung damage by several mechanisms gathered under the name “patient-self inflicted lung injury” (P-SILI). Even though no clinical study has yet demonstrated that a ventilatory strategy to limit the risk of P-SILI can improve the outcome, the concept of P-SILI relies on sound physiological reasoning, an accumulation of clinical observations and some consistent experimental data. In this review, we detail the main pathophysiological mechanisms by which the patient’s respiratory effort could become deleterious: excessive transpulmonary pressure resulting in over-distension; inhomogeneous distribution of transpulmonary pressure variations across the lung leading to cyclic opening/closing of nondependent regions and pendelluft phenomenon; increase in the transvascular pressure favoring the aggravation of pulmonary edema. We also describe potentially harmful patient-ventilator interactions. Finally, we discuss in a practical way how to detect in the clinical setting situations at risk for P-SILI and to what extent this recognition can help personalize the treatment strategy.
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Affiliation(s)
- Guillaume Carteaux
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
- INSERM U955, Institut Mondor de Recherche Biomédicale, F-94010 Créteil, France
- Correspondence:
| | - Mélodie Parfait
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
| | - Margot Combet
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
| | - Anne-Fleur Haudebourg
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
| | - Samuel Tuffet
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
- INSERM U955, Institut Mondor de Recherche Biomédicale, F-94010 Créteil, France
| | - Armand Mekontso Dessap
- Assistance Publique-Hôpitaux de Paris, CHU Henri Mondor, Service de Médecine Intensive Réanimation, F-94010 Créteil, France; (M.P.); (M.C.); (A.-F.H.); (S.T.); (A.M.D.)
- Groupe de Recherche Clinique CARMAS, Faculté de Santé, Université Paris Est-Créteil, F-94010 Créteil, France
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Etiology, incidence, and outcomes of patient-ventilator asynchrony in critically-ill patients undergoing invasive mechanical ventilation. Sci Rep 2021; 11:12390. [PMID: 34117278 PMCID: PMC8196026 DOI: 10.1038/s41598-021-90013-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 04/30/2021] [Indexed: 02/05/2023] Open
Abstract
Patient-ventilator asynchrony (PVA) is commonly encountered during mechanical ventilation of critically ill patients. Estimates of PVA incidence vary widely. Type, risk factors, and consequences of PVA remain unclear. We aimed to measure the incidence and identify types of PVA, characterize risk factors for development, and explore the relationship between PVA and outcome among critically ill, mechanically ventilated adult patients admitted to medical, surgical, and medical-surgical intensive care units in a large academic institution staffed with varying provider training background. A single center, retrospective cohort study of all adult critically ill patients undergoing invasive mechanical ventilation for ≥ 12 h. A total of 676 patients who underwent 696 episodes of mechanical ventilation were included. Overall PVA occurred in 170 (24%) episodes. Double triggering 92(13%) was most common, followed by flow starvation 73(10%). A history of smoking, and pneumonia, sepsis, or ARDS were risk factors for overall PVA and double triggering (all P < 0.05). Compared with volume targeted ventilation, pressure targeted ventilation decreased the occurrence of events (all P < 0.01). During volume controlled synchronized intermittent mandatory ventilation and pressure targeted ventilation, ventilator settings were associated with the incidence of overall PVA. The number of overall PVA, as well as double triggering and flow starvation specifically, were associated with worse outcomes and fewer hospital-free days (all P < 0.01). Double triggering and flow starvation are the most common PVA among critically ill, mechanically ventilated patients. Overall incidence as well as double triggering and flow starvation PVA specifically, portend worse outcome.
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Reverse Triggering Dyssynchrony 24 h after Initiation of Mechanical Ventilation. Anesthesiology 2021; 134:760-769. [PMID: 33662121 DOI: 10.1097/aln.0000000000003726] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Reverse triggering is a delayed asynchronous contraction of the diaphragm triggered by passive insufflation by the ventilator in sedated mechanically ventilated patients. The incidence of reverse triggering is unknown. This study aimed at determining the incidence of reverse triggering in critically ill patients under controlled ventilation. METHODS In this ancillary study, patients were continuously monitored with a catheter measuring the electrical activity of the diaphragm. A method for automatic detection of reverse triggering using electrical activity of the diaphragm was developed in a derivation sample and validated in a subsequent sample. The authors assessed the predictive value of the software. In 39 recently intubated patients under assist-control ventilation, a 1-h recording obtained 24 h after intubation was used to determine the primary outcome of the study. The authors also compared patients' demographics, sedation depth, ventilation settings, and time to transition to assisted ventilation or extubation according to the median rate of reverse triggering. RESULTS The positive and negative predictive value of the software for detecting reverse triggering were 0.74 (95% CI, 0.67 to 0.81) and 0.97 (95% CI, 0.96 to 0.98). Using a threshold of 1 μV of electrical activity to define diaphragm activation, median reverse triggering rate was 8% (range, 0.1 to 75), with 44% (17 of 39) of patients having greater than or equal to 10% of breaths with reverse triggering. Using a threshold of 3 μV, 26% (10 of 39) of patients had greater than or equal to 10% reverse triggering. Patients with more reverse triggering were more likely to progress to an assisted mode or extubation within the following 24 h (12 of 39 [68%]) vs. 7 of 20 [35%]; P = 0.039). CONCLUSIONS Reverse triggering detection based on electrical activity of the diaphragm suggests that this asynchrony is highly prevalent at 24 h after intubation under assist-control ventilation. Reverse triggering seems to occur during the transition phase between deep sedation and the onset of patient triggering. EDITOR’S PERSPECTIVE
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[Patient self-inflicted lung injury (P-SILI) : From pathophysiology to clinical evaluation with differentiated management]. Med Klin Intensivmed Notfmed 2021; 116:614-623. [PMID: 33961061 PMCID: PMC8103432 DOI: 10.1007/s00063-021-00823-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 02/08/2023]
Abstract
Die Etablierung der unterstützten Spontanatmung gilt allgemein als eine vorteilhafte und wenig gefährdende Phase der Beatmungstherapie. Allerdings geben neuere Erkenntnisse Hinweise auf eine potenzielle Schädigung durch exzessive Spontanatembemühungen vor allem bei akuter Lungenschädigung. Das Syndrom wird unter dem Begriff „patient self-inflicted lung injury“ zusammengefasst. Ärzte, Pflegepersonen und Atmungstherapeuten sollten für diese Thematik sensibilisiert werden. Parameter, die mittels Ösophagusdruckmessung oder einfacher Manöver am Respirator bestimmt werden können, sind bei der Entscheidung zur Durchführung und zur Überwachung von Spontanatmung auch in den akuten Phasen der Lungenschädigung hilfreich. Weiterhin gibt es im Umgang mit hohem Atemantrieb oder erhöhter Atemanstrengung therapeutische Möglichkeiten, diesen zu begegnen.
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Maracaja L, Khanna AK, Royster R, Maracaja D, Lane M, Jordan JE. Selective Lobe Ventilation and a Novel Platform for Pulmonary Drug Delivery. J Cardiothorac Vasc Anesth 2021; 35:3416-3422. [PMID: 34103214 PMCID: PMC8095071 DOI: 10.1053/j.jvca.2021.04.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 04/18/2021] [Accepted: 04/24/2021] [Indexed: 11/17/2022]
Abstract
The current methods of mechanical ventilation and pulmonary drug delivery do not account for the heterogeneity of acute respiratory distress syndrome or its dependence on gravity. The severe lung disease caused by severe acute respiratory distress syndrome coronavirus 2, coronavirus disease 2019, is one of the many causes of acute respiratory distress syndrome. Severe acute respiratory distress syndrome coronavirus 2 has caused more than three million deaths worldwide and has challenged all therapeutic options for mechanical ventilation. Thus, new therapies are necessary to prevent deaths and long-term complications of severe lung diseases and prolonged mechanical ventilation. The authors of the present report have developed a novel device that allows selective lobe ventilation and selective lobe recruitment and provides a new platform for pulmonary drug delivery. A major advantage of separating lobes that are mechanically heterogeneous is to allow for customization of ventilator parameters to match the needs of segments with similar compliance, a better overall ventilation perfusion relationship, and prevention of ventilator-induced lung injury of more compliant lobes. This device accounts for lung heterogeneity and is a potential new therapy for acute lung injury by allowing selective lobe mechanical ventilation using two novel modes of mechanical ventilation (differential positive end-expiratory pressure and asynchronous ventilation), and two new modalities of alveolar recruitment (selective lobe recruitment and continuous positive airway pressure of lower lobes with continuous ventilation of upper lobes). Herein the authors report their initial experience with this novel device, including a brief overview of device development; the initial in vitro, ex vivo, and in vivo testing; layout of future research; potential benefits and new therapies; and expected challenges before its uniform implementation into clinical practice.
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Affiliation(s)
- Luiz Maracaja
- Department of Anesthesiology, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC.
| | - Ashish K Khanna
- Department of Anesthesiology, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC
| | - Roger Royster
- Department of Anesthesiology, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC
| | - Danielle Maracaja
- Department of Pathology, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC
| | - Magan Lane
- Department of Cardiothoracic Surgery, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC
| | - James Eric Jordan
- Department of Cardiothoracic Surgery, Wake Forest Baptist Medical Center, Wake Forest University, Winston-Salem, NC
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Clusters of Double Triggering Impact Clinical Outcomes: Insights From the EPIdemiology of Patient-Ventilator aSYNChrony (EPISYNC) Cohort Study. Crit Care Med 2021; 49:1460-1469. [PMID: 33883458 DOI: 10.1097/ccm.0000000000005029] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To measure the impact of clusters of double triggering on clinical outcomes. DESIGN Prospective cohort study. SETTING Respiratory ICU in Brazil. PATIENTS Adult patients under recent mechanical ventilation and with expectation of mechanical ventilation for more than 24 hours after enrollment. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS We used a dedicated software to analyze ventilator waveforms throughout the entire period of mechanical ventilation and detect double triggering. We defined a cluster of double triggering as a period of time containing at least six double triggering events in a 3-minute period. Patients were followed until hospital discharge. We addressed the association between the presence and the duration of clusters with clinical outcomes. A total of 103 patients were enrolled in the study and 90 (87%) had at least one cluster of double triggering. The median number of clusters per patient was 19 (interquartile range, 6-41), with a median duration of 8 minutes (6-12 min). Compared with patients who had no clusters, patients with at least one cluster had longer duration of mechanical ventilation (7 d [4-11 d] vs 2 d [2-3 d]) and ICU length of stay (9 d [7-16 d] vs 13 d [2-8 d]). Thirty-three patients had high cumulative duration of clusters of double triggering (≥ 12 hr), and it was associated with longer duration of mechanical ventilation, fewer ventilator-free days, and longer ICU length of stay. Adjusted by duration of mechanical ventilation and severity of illness, high cumulative duration of clusters was associated with shorter survival at 28 days (hazard ratio, 2.09 d; 95% CI, 1.04-4.19 d). CONCLUSIONS Clusters of double triggering are common and were associated with worse clinical outcomes. Patients who had a high cumulative duration of clusters had fewer ventilator-free days, longer duration of mechanical ventilation, longer ICU length of stay, and shorter survival than patients with low cumulative duration of cluster.
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Patient–Ventilator Interaction Testing Using the Electromechanical Lung Simulator xPULM™ during V/A-C and PSV Ventilation Mode. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11093745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
During mechanical ventilation, a disparity between flow, pressure and volume demands of the patient and the assistance delivered by the mechanical ventilator often occurs. This paper introduces an alternative approach of simulating and evaluating patient–ventilator interactions with high fidelity using the electromechanical lung simulator xPULM™. The xPULM™ approximates respiratory activities of a patient during alternating phases of spontaneous breathing and apnea intervals while connected to a mechanical ventilator. Focusing on different triggering events, volume assist-control (V/A-C) and pressure support ventilation (PSV) modes were chosen to test patient–ventilator interactions. In V/A-C mode, a double-triggering was detected every third breathing cycle, leading to an asynchrony index of 16.67%, which is classified as severe. This asynchrony causes a significant increase of peak inspiratory pressure (7.96 ± 6.38 vs. 11.09 ± 0.49 cmH2O, p < 0.01)) and peak expiratory flow (−25.57 ± 8.93 vs. 32.90 ± 0.54 L/min, p < 0.01) when compared to synchronous phases of the breathing simulation. Additionally, events of premature cycling were observed during PSV mode. In this mode, the peak delivered volume during simulated spontaneous breathing phases increased significantly (917.09 ± 45.74 vs. 468.40 ± 31.79 mL, p < 0.01) compared to apnea phases. Various dynamic clinical situations can be approximated using this approach and thereby could help to identify undesired patient–ventilation interactions in the future. Rapidly manufactured ventilator systems could also be tested using this approach.
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Optimal Sedation in Patients Who Receive Neuromuscular Blocking Agent Infusions for Treatment of Acute Respiratory Distress Syndrome-A Retrospective Cohort Study From a New England Health Care Network. Crit Care Med 2021; 49:1137-1148. [PMID: 33710031 DOI: 10.1097/ccm.0000000000004951] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Two previously published trials (ARDS et Curarisation Systematique [ACURASYS] and Reevaluation of Systemic Early Neuromuscular Blockade [ROSE]) presented equivocal evidence on the effect of neuromuscular blocking agent infusions in patients with acute respiratory distress syndrome (acute respiratory distress syndrome). The sedation regimen differed between these trials and also within the ROSE trial between treatment and control groups. We hypothesized that the proportion of deeper sedation is a mediator of the effect of neuromuscular blocking agent infusions on mortality. DESIGN Retrospective cohort study. SETTING Seven ICUs in an academic hospital network, Beth Israel Deaconess Medical Center (Boston, MA). PATIENTS Intubated and mechanically ventilated ICU patients with acute respiratory distress syndrome (Berlin definition) admitted between January 2008 until June 2019. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS The proportion of deeper sedation was defined as days with nonlight sedation as a fraction of mechanical ventilation days in the ICU after acute respiratory distress syndrome diagnosis. Using clinical data obtained from a hospital network registry, 3,419 patients with acute respiratory distress syndrome were included, of whom 577 (16.9%) were treated with neuromuscular blocking agent infusions, for a mean (sd) duration of 1.8 (±1.9) days. The duration of deeper sedation was prolonged in patients receiving neuromuscular blocking agent infusions (4.6 ± 2.2 d) compared with patients without neuromuscular blocking agent infusions (2.4 ± 2.2 d; p < 0.001). The proportion of deeper sedation completely mediated the negative effect of neuromuscular blocking agent infusions on in-hospital mortality (p < 0.001). Exploratory analysis in patients who received deeper sedation revealed a beneficial effect of neuromuscular blocking agent infusions on mortality (49% vs 51%; adjusted odds ratio, 0.80; 95% CI, 0.63-0.99, adjusted absolute risk difference, -0.05; p = 0.048). CONCLUSIONS In acute respiratory distress syndrome patients who receive neuromuscular blocking agent infusions, a prolonged, high proportion of deeper sedation is associated with increased mortality. Our data support the view that clinicians should minimize the duration of deeper sedation after recovery from neuromuscular blocking agent infusion.
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See KC, Sahagun J, Cove M, Sum CL, Garcia B, Chanco D, Misanes S, Abastillas E, Taculod J. Managing patient-ventilator asynchrony with a twice-daily screening protocol: A retrospective cohort study. Aust Crit Care 2021; 34:539-546. [PMID: 33632607 DOI: 10.1016/j.aucc.2020.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 09/26/2020] [Accepted: 11/01/2020] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Severe patient-ventilator asynchrony (PVA) might be associated with prolonged mechanical ventilation and mortality. It is unknown if systematic screening and application of conventional methods for PVA management can modify these outcomes. We therefore constructed a twice-daily bedside PVA screening and management protocol and investigated its effect on patient outcomes. MATERIALS AND METHODS A retrospective cohort study of patients who were intubated in the emergency department and directly admitted to the medical intensive care unit (ICU). In phase 1 (6 months; August 2016 to January 2017), patients received usual care comprising lung protective ventilation and moderate analgesia/sedation. In phase 2 (6 months; February 2017 to July 2017), patients were additionally managed with a PVA protocol on ICU admission and twice daily (7 am, 7 pm). RESULTS A total of 280 patients (160 in phase 1, 120 in phase 2) were studied (age = 64.5 ± 21.4 years, 107 women [38.2%], Acute Physiology and Chronic Health Evaluation II score = 27.1 ± 8.5, 271 [96.8%] on volume assist-control ventilation initially). Phase 2 patients had lower hospital mortality than phase 1 patients (20.0% versus 34.4%, respectively, P = 0.011), even after adjustment for age and Acute Physiology and Chronic Health Evaluation II scores (odds ratio = 0.46, 95% confidence interval = 0.25-0.84). CONCLUSIONS Application of a bedside PVA protocol for mechanically ventilated patients on ICU admission and twice daily was associated with decreased hospital mortality. There was however no association with sedation-free days or mechanical ventilation-free days through day 28 or length of hospital stay.
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Affiliation(s)
- Kay Choong See
- Division of Respiratory & Critical Care Medicine, Department of Medicine, National University Health System, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Juliet Sahagun
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
| | - Matthew Cove
- Division of Respiratory & Critical Care Medicine, Department of Medicine, National University Health System, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Chew Lai Sum
- Department of Nursing, National University Hospital, Singapore.
| | - Bimbo Garcia
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
| | - David Chanco
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
| | - Sherill Misanes
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
| | - Emily Abastillas
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
| | - Juvel Taculod
- Division of Critical Care - Respiratory Therapy, National University Hospital, Singapore.
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Baedorf Kassis E, Su HK, Graham AR, Novack V, Loring SH, Talmor DS. Reverse Trigger Phenotypes in Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med 2021; 203:67-77. [PMID: 32809842 DOI: 10.1164/rccm.201907-1427oc] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Rationale: Reverse triggering is an underexplored form of dyssynchrony with important clinical implications in patients with acute respiratory distress syndrome.Objectives: This retrospective study identified reverse trigger phenotypes and characterized their impacts on Vt and transpulmonary pressure.Methods: Fifty-five patients with acute respiratory distress syndrome on pressure-regulated ventilator modes were included. Four phenotypes of reverse triggering with and without breath stacking and their impact on lung inflation and deflation were investigated.Measurements and Main Results: Inflation volumes, respiratory muscle pressure generation, and transpulmonary pressures were determined and phenotypes differentiated using Campbell diagrams of respiratory activity. Reverse triggering was detected in 25 patients, 15 with associated breath stacking, and 13 with stable reverse triggering consistent with respiratory entrainment. Phenotypes were associated with variable levels of inspiratory effort (mean 4-10 cm H2O per phenotype). Early reverse triggering with early expiratory relaxation increased Vts (88 [64-113] ml) and inspiratory transpulmonary pressures (3 [2-3] cm H2O) compared with passive breaths. Early reverse triggering with delayed expiratory relaxation increased Vts (128 [86-170] ml) and increased inspiratory and mean-expiratory transpulmonary pressure (7 [5-9] cm H2O and 5 [4-6] cm H2O). Mid-cycle reverse triggering (initiation during inflation and maximal effort during deflation) increased Vt (51 [38-64] ml), increased inspiratory and mean-expiratory transpulmonary pressure (3 [2-4] cm H2O and 3 [2-3] cm H2O), and caused incomplete exhalation. Late reverse triggering (occurring exclusively during exhalation) increased mean expiratory transpulmonary pressure (2 [1-2] cm H2O) and caused incomplete exhalation. Breath stacking resulted in large delivered volumes (176 [155-197] ml).Conclusions: Reverse triggering causes variable physiological effects, depending on the phenotype. Differentiation of phenotype effects may be important to understand the clinical impacts of these events.
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Affiliation(s)
- Elias Baedorf Kassis
- Division of Pulmonary and Critical Care.,Harvard Medical School, Boston, Massachusetts; and
| | - Henry K Su
- Department of Anesthesia, Critical Care and Pain Medicine, and.,Harvard Medical School, Boston, Massachusetts; and
| | - Alexander R Graham
- Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts; and
| | - Victor Novack
- Clinical Research Center, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Stephen H Loring
- Department of Anesthesia, Critical Care and Pain Medicine, and.,Harvard Medical School, Boston, Massachusetts; and
| | - Daniel S Talmor
- Department of Anesthesia, Critical Care and Pain Medicine, and.,Harvard Medical School, Boston, Massachusetts; and
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50
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Telias I, Beitler JR. Reverse Triggering, the Rhythm Dyssynchrony: Potential Implications for Lung and Diaphragm Protection. Am J Respir Crit Care Med 2021; 203:5-6. [PMID: 32841572 PMCID: PMC7781145 DOI: 10.1164/rccm.202008-3172ed] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Irene Telias
- Interdepartmental Division of Critical Care Medicine University of Toronto Toronto, Ontario, Canada.,Li Ka Shing Knowledge Institute St. Michael's Hospital Toronto, Ontario, Canada.,Department of Medicine University Health Network and Sinai Health System Toronto, Ontario, Canada
| | - Jeremy R Beitler
- Division of Pulmonary, Allergy, and Critical Care Medicine Columbia University New York, New York and.,Center for Acute Respiratory Failure New York-Presbyterian Hospital New York, New York
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