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Nakornnoi B, Tscheikuna J, Rittayamai N. The effects of real-time waveform analysis software on patient ventilator synchronization during pressure support ventilation: a randomized crossover physiological study. BMC Pulm Med 2024; 24:212. [PMID: 38693506 PMCID: PMC11064376 DOI: 10.1186/s12890-024-03039-0] [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: 11/22/2023] [Accepted: 04/26/2024] [Indexed: 05/03/2024] Open
Abstract
BACKGROUND Patient-ventilator asynchrony commonly occurs during pressure support ventilation (PSV). IntelliSync + software (Hamilton Medical AG, Bonaduz, Switzerland) is a new ventilation technology that continuously analyzes ventilator waveforms to detect the beginning and end of patient inspiration in real time. This study aimed to evaluate the physiological effect of IntelliSync + software on inspiratory trigger delay time, delta airway (Paw) and esophageal (Pes) pressure drop during the trigger phase, airway occlusion pressure at 0.1 s (P0.1), and hemodynamic variables. METHODS A randomized crossover physiologic study was conducted in 14 mechanically ventilated patients under PSV. Patients were randomly assigned to receive conventional flow trigger and cycling, inspiratory trigger synchronization (I-sync), cycle synchronization (C-sync), and inspiratory trigger and cycle synchronization (I/C-sync) for 15 min at each step. Other ventilator settings were kept constant. Paw, Pes, airflow, P0.1, respiratory rate, SpO2, and hemodynamic variables were recorded. The primary outcome was inspiratory trigger and cycle delay time between each intervention. Secondary outcomes were delta Paw and Pes drop during the trigger phase, P0.1, SpO2, and hemodynamic variables. RESULTS The time to initiate the trigger was significantly shorter with I-sync compared to baseline (208.9±91.7 vs. 301.4±131.7 msec; P = 0.002) and I/C-sync compared to baseline (222.8±94.0 vs. 301.4±131.7 msec; P = 0.005). The I/C-sync group had significantly lower delta Paw and Pes drop during the trigger phase compared to C-sync group (-0.7±0.4 vs. -1.2±0.8 cmH2O; P = 0.028 and - 1.8±2.2 vs. -2.8±3.2 cmH2O; P = 0.011, respectively). No statistically significant differences were found in cycle delay time, P0.1 and other physiological variables between the groups. CONCLUSIONS IntelliSync + software reduced inspiratory trigger delay time compared to the conventional flow trigger system during PSV mode. However, no significant improvements in cycle delay time and other physiological variables were observed with IntelliSync + software. TRIAL REGISTRATION This study was registered in the Thai Clinical Trial Registry (TCTR20200528003; date of registration 28/05/2020).
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Affiliation(s)
- Barnpot Nakornnoi
- Division of Respiratory Diseases and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jamsak Tscheikuna
- Division of Respiratory Diseases and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nuttapol Rittayamai
- Division of Respiratory Diseases and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Bluth T, Güldner A, Spieth PM. [Ventilation concepts under extracorporeal membrane oxygenation (ECMO) in acute respiratory distress syndrome (ARDS)]. DIE ANAESTHESIOLOGIE 2024; 73:352-362. [PMID: 38625538 DOI: 10.1007/s00101-024-01407-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Extracorporeal membrane oxygenation (ECMO) is often the last resort for escalation of treatment in patients with severe acute respiratory distress syndrome (ARDS). The success of treatment is mainly determined by patient-specific factors, such as age, comorbidities, duration and invasiveness of the pre-existing ventilation treatment as well as the expertise of the treating ECMO center. In particular, the adjustment of mechanical ventilation during ongoing ECMO treatment remains controversial. Although a reduction of invasiveness of mechanical ventilation seems to be reasonable due to physiological considerations, no improvement in outcome has been demonstrated so far for the use of ultraprotective ventilation regimens.
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Affiliation(s)
- Thomas Bluth
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland
| | - Andreas Güldner
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland
| | - Peter M Spieth
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland.
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Widing H, Pellegrini M, Chiodaroli E, Persson P, Hallén K, Perchiazzi G. Positive end-expiratory pressure limits inspiratory effort through modulation of the effort-to-drive ratio: an experimental crossover study. Intensive Care Med Exp 2024; 12:10. [PMID: 38311676 PMCID: PMC10838888 DOI: 10.1186/s40635-024-00597-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 01/11/2024] [Indexed: 02/06/2024] Open
Abstract
BACKGROUND How assisted spontaneous breathing should be used during acute respiratory distress syndrome is questioned. Recent evidence suggests that high positive end-expiratory pressure (PEEP) may limit the risk of patient self-inflicted lung injury (P-SILI). The aim of this study was to assess the effects of PEEP on esophageal pressure swings, inspiratory drive, and the neuromuscular efficiency of ventilation. We hypothesized that high PEEP would reduce esophageal pressure swings, regardless of inspiratory drive changes, by modulating the effort-to-drive ratio (EDR). This was tested retrospectively in an experimental animal crossover study. Anesthetized pigs (n = 15) were subjected to mild to moderate lung injury and different PEEP levels were applied, changing PEEP from 0 to 15 cmH2O and back to 0 cmH2O in steps of 3 cmH2O. Airway pressure, esophageal pressure (Pes), and electric activity of the diaphragm (Edi) were collected. The EDR was calculated as the tidal change in Pes divided by the tidal change in Edi. Statistical differences were tested using the Wilcoxon signed-rank test. RESULTS Inspiratory esophageal pressure swings decreased from - 4.2 ± 3.1 cmH2O to - 1.9 ± 1.5 cmH2O (p < 0.01), and the mean EDR fell from - 1.12 ± 1.05 cmH2O/µV to - 0.24 ± 0.20 (p < 0.01) as PEEP was increased from 0 to 15 cmH2O. The EDR was significantly correlated to the PEEP level (rs = 0.35, p < 0.01). CONCLUSIONS Higher PEEP limits inspiratory effort by modulating the EDR of the respiratory system. These findings indicate that PEEP may be used in titration of the spontaneous impact on ventilation and in P-SILI risk reduction, potentially facilitating safe assisted spontaneous breathing. Similarly, ventilation may be shifted from highly spontaneous to predominantly controlled ventilation using PEEP. These findings need to be confirmed in clinical settings.
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Affiliation(s)
- Hannes Widing
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden.
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital/Östra, Gothenburg, Sweden.
| | - Mariangela Pellegrini
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Department of Anesthesia, Operation, and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
| | - Elena Chiodaroli
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Anesthesia and Intensive Care Medicine, Polo Universitario San Paolo, University of Milan, Milan, Italy
| | - Per Persson
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Katarina Hallén
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital/Östra, Gothenburg, Sweden
| | - Gaetano Perchiazzi
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Department of Anesthesia, Operation, and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
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4
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Docci M, Rezoagli E, Teggia-Droghi M, Coppadoro A, Pozzi M, Grassi A, Bianchi I, Foti G, Bellani G. Individual response in patient's effort and driving pressure to variations in assistance during pressure support ventilation. Ann Intensive Care 2023; 13:132. [PMID: 38123757 PMCID: PMC10733248 DOI: 10.1186/s13613-023-01231-9] [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: 08/05/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND During Pressure Support Ventilation (PSV) an inspiratory hold allows to measure plateau pressure (Pplat), driving pressure (∆P), respiratory system compliance (Crs) and pressure-muscle-index (PMI), an index of inspiratory effort. This study aims [1] to assess systematically how patient's effort (estimated with PMI), ∆P and tidal volume (Vt) change in response to variations in PSV and [2] to confirm the robustness of Crs measurement during PSV. METHODS 18 patients recovering from acute respiratory failure and ventilated by PSV were cross-randomized to four steps of assistance above (+ 3 and + 6 cmH2O) and below (-3 and -6 cmH2O) clinically set PS. Inspiratory and expiratory holds were performed to measure Pplat, PMI, ∆P, Vt, Crs, P0.1 and occluded inspiratory airway pressure (Pocc). Electromyography of respiratory muscles was monitored noninvasively from body surface (sEMG). RESULTS As PSV was decreased, Pplat (from 20.5 ± 3.3 cmH2O to 16.7 ± 2.9, P < 0.001) and ∆P (from 12.5 ± 2.3 to 8.6 ± 2.3 cmH2O, P < 0.001) decreased much less than peak airway pressure did (from 21.7 ± 3.8 to 9.7 ± 3.8 cmH2O, P < 0.001), given the progressive increase of patient's effort (PMI from -1.2 ± 2.3 to 6.4 ± 3.2 cmH2O) in line with sEMG of the diaphragm (r = 0.614; P < 0.001). As ∆P increased linearly with Vt, Crs did not change through steps (P = 0.119). CONCLUSION Patients react to a decrease in PSV by increasing inspiratory effort-as estimated by PMI-keeping Vt and ∆P on a desired value, therefore, limiting the clinician's ability to modulate them. PMI appears a valuable index to assess the point of ventilatory overassistance when patients lose control over Vt like in a pressure-control mode. The measurement of Crs in PSV is constant-likely suggesting reliability-independently from the level of assistance and patient's effort.
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Affiliation(s)
- Mattia Docci
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Emanuele Rezoagli
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy
| | - Maddalena Teggia-Droghi
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy
| | - Andrea Coppadoro
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy
| | - Matteo Pozzi
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy
| | - Alice Grassi
- Department of Anesthesia and Pain Medicine, Toronto General Hospital, Toronto, ON, Canada
| | - Isabella Bianchi
- Department of Anesthesia and Intensive Care, ASST Papa Giovanni XXIII, Bergamo, Italy
| | - Giuseppe Foti
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy
| | - Giacomo Bellani
- Centre for Medical Sciences-CISMed, University of Trento, Trento, Italy.
- Department of Anesthesia and Intensive Care, Santa Chiara Hospital, APSS Trento Largo Medaglie d'Oro Trento, Trento, Italy.
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Aslam TN, Klitgaard TL, Ahlstedt CAO, Andersen FH, Chew MS, Collet MO, Cronhjort M, Estrup S, Fossum OK, Frisvold SK, Gillmann HJ, Granholm A, Gundem TM, Hauss K, Hollenberg J, Huanca Condori ME, Hästbacka J, Johnstad BA, Keus E, Kjaer MBN, Klepstad P, Krag M, Kvåle R, Malbrain MLNG, Meyhoff CS, Morgan M, Møller A, Pfortmueller CA, Poulsen LM, Robertson AC, Schefold JC, Schjørring OL, Siegemund M, Sigurdsson MI, Sjövall F, Strand K, Stueber T, Szczeklik W, Wahlin RR, Wangberg HL, Wian KA, Wichmann S, Hofsø K, Møller MH, Perner A, Rasmussen BS, Laake JH. A survey of preferences for respiratory support in the intensive care unit for patients with acute hypoxaemic respiratory failure. Acta Anaesthesiol Scand 2023; 67:1383-1394. [PMID: 37737652 DOI: 10.1111/aas.14317] [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: 06/26/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 09/23/2023]
Abstract
BACKGROUND When caring for mechanically ventilated adults with acute hypoxaemic respiratory failure (AHRF), clinicians are faced with an uncertain choice between ventilator modes allowing for spontaneous breaths or ventilation fully controlled by the ventilator. The preferences of clinicians managing such patients, and what motivates their choice of ventilator mode, are largely unknown. To better understand how clinicians' preferences may impact the choice of ventilatory support for patients with AHRF, we issued a survey to an international network of intensive care unit (ICU) researchers. METHODS We distributed an online survey with 32 broadly similar and interlinked questions on how clinicians prioritise spontaneous or controlled ventilation in invasively ventilated patients with AHRF of different severity, and which factors determine their choice. RESULTS The survey was distributed to 1337 recipients in 12 countries. Of these, 415 (31%) completed the survey either fully (52%) or partially (48%). Most respondents were identified as medical specialists (87%) or physicians in training (11%). Modes allowing for spontaneous ventilation were considered preferable in mild AHRF, with controlled ventilation considered as progressively more important in moderate and severe AHRF. Among respondents there was strong support (90%) for a randomised clinical trial comparing spontaneous with controlled ventilation in patients with moderate AHRF. CONCLUSIONS The responses from this international survey suggest that there is clinical equipoise for the preferred ventilator mode in patients with AHRF of moderate severity. We found strong support for a randomised trial comparing modes of ventilation in patients with moderate AHRF.
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Affiliation(s)
- Tayyba N Aslam
- Department of Anaesthesiology and Intensive Care Medicine, Division of Emergencies and Critical Care, Rikshopitalet, Oslo University Hospital, Oslo, Norway
- Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Thomas L Klitgaard
- Department of Anaesthesia and Intensive Care, Aalborg University Hospital, Aalborg, Denmark
| | - Christian A O Ahlstedt
- Perioperative Medicine and Intensive Care, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Finn H Andersen
- Anaesthesia and Intensive Care, Ålesund Hospital, Ålesund, Norway
| | - Michelle S Chew
- Department of Anaesthesia and Intensive Care, Biomedical and Clinical Sciences, Linköping University Hospital, Linköping, Sweden
| | - Marie O Collet
- Department of Intensive Care 4131, Rigshospitalet-Copenhagen University Hospital, Copenhagen, Denmark
| | - Maria Cronhjort
- Department of Clinical Science, Danderyds Sjukhus, Karolinska Institutet, Stockholm, Sweden
| | - Stine Estrup
- Intensive Care, Rigshospitalet, Copenhagen, Denmark
| | - Ole K Fossum
- Anaesthesia and Intensive Care, Akershus University Hospital, Nordbyhagen, Norway
| | - Shirin K Frisvold
- Anesthesiology and Intensive Care, University Hospital of North Norway, Tromsø, Norway
| | - Hans-Joerg Gillmann
- Anesthesiology and Intensive Care Medicine, Hannover Medical School, Hannover, Germany
| | - Anders Granholm
- Department of Intensive Care 4131, Rigshospitalet-Copenhagen University Hospital, Copenhagen, Denmark
| | - Trine M Gundem
- Anaesthesiology and Intensive Care Medicine, Ullevål, Oslo University Hospital, Oslo, Norway
| | - Kristin Hauss
- Acute- and Emergency Medicine, Sykehuset Telemark, Skien, Norway
| | - Jacob Hollenberg
- Department of Cardiology, Medical Intensive Care Unit, Karolinska Institutet, Stockholm, Sweden
| | | | - Johanna Hästbacka
- Department of Perioperative and Intensive Care Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | | | - Eric Keus
- Critical Care, University Medical Center Groningen, Groningen, Netherlands
| | - Maj-Brit N Kjaer
- Department of Intensive Care 4131, Rigshospitalet-Copenhagen University Hospital, Copenhagen, Denmark
| | - Pål Klepstad
- Intensive Care Medicine, St Olavs University Hospital, Trondheim, Norway
| | - Mette Krag
- Department of Anaesthesiology, Holbaek Hospital, Holbaek, Denmark
| | - Reidar Kvåle
- Anaesthesia and Intensive Care, Haukeland University Hospital, Bergen, Norway
| | - Manu L N G Malbrain
- First Department of Anaesthesiology and Intensive Therapy, Medical University of Lublin, Lublin, Poland
| | - Christian S Meyhoff
- Department of Anaesthesia and Intensive Care, Copenhagen University Hospital-Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Matt Morgan
- Adult Intensive Care, The Royal Perth Hospital, Perth, Western Australia, Australia
| | - Anders Møller
- Department of Anaesthesia and Intensive Care, Copenhagen University Hospital-Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Carmen A Pfortmueller
- Department of Intensive Care, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Lone M Poulsen
- Intensive Care Unit, Zealand University Hospital, Køge, Denmark
| | | | - Joerg C Schefold
- Department of Intensive Care Medicine, Inselspital, University of Bern, Bern, Switzerland
| | - Olav L Schjørring
- Department of Anaesthesia and Intensive Care, Aalborg University Hospital, Aalborg, Denmark
| | | | - Martin I Sigurdsson
- Anaesthesiology and Intensive Care Medicine, Landspital-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Fredrik Sjövall
- Intensive and Perioperative Care, Skane University Hospital, Malmö, Sweden
| | - Kristian Strand
- Intensive Care, Stavanger University Hospital, Stavanger, Norway
| | - Thomas Stueber
- Department of Anaesthesiology and Intensive Care, Hannover Medical School, Hannover, Germany
| | - Wojciech Szczeklik
- Center for Intensive Care and Perioperative Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Rebecka R Wahlin
- Department of Anaesthesia and Intensive Care, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | | | - Karl-Andre Wian
- Anaesthesia and Intensive Care, Vestfold Hospital Trust, Tønsberg, Norway
| | - Sine Wichmann
- Department of Anaesthesia and Intensive Care, Copenhagen University Hospital-North Zealand, Hillerød, Denmark
| | - Kristin Hofsø
- Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
| | - Morten H Møller
- Department of Intensive Care 4131, Rigshospitalet-Copenhagen University Hospital, Copenhagen, Denmark
| | - Anders Perner
- Department of Intensive Care 4131, Rigshospitalet-Copenhagen University Hospital, Copenhagen, Denmark
| | - Bodil S Rasmussen
- Department of Anaesthesia and Intensive Care, Aalborg University Hospital, Aalborg, Denmark
| | - Jon H Laake
- Department of Anaesthesiology and Intensive Care Medicine, Division of Emergencies and Critical Care, Rikshopitalet, Oslo University Hospital, Oslo, Norway
- Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
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Pérez J, Accoce M, Dorado JH, Gilgado DI, Navarro E, Cardoso GP, Telias I, Rodriguez PO, Brochard L. Failure of First Transition to Pressure Support Ventilation After Spontaneous Awakening Trials in Hypoxemic Respiratory Failure: Influence of COVID-19. Crit Care Explor 2023; 5:e0968. [PMID: 37644972 PMCID: PMC10461949 DOI: 10.1097/cce.0000000000000968] [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: 08/31/2023] Open
Abstract
OBJECTIVES To describe the rate of failure of the first transition to pressure support ventilation (PSV) after systematic spontaneous awakening trials (SATs) in patients with acute hypoxemic respiratory failure (AHRF) and to assess whether the failure is higher in COVID-19 compared with AHRF of other etiologies. To determine predictors and potential association of failure with outcomes. DESIGN Retrospective cohort study. SETTING Twenty-eight-bedded medical-surgical ICU in a private hospital (Argentina). PATIENTS Subjects with arterial pressure of oxygen (AHRF to Fio2 [Pao2/Fio2] < 300 mm Hg) of different etiologies under controlled mechanical ventilation (MV). INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS We collected data during controlled ventilation within 24 hours before SAT followed by the first PSV transition. Failure was defined as the need to return to fully controlled MV within 3 calendar days of PSV start. A total of 274 patients with AHRF (189 COVID-19 and 85 non-COVID-19) were included. The failure occurred in 120 of 274 subjects (43.7%) and was higher in COVID-19 versus non-COVID-19 (49.7% and 30.5%; p = 0.003). COVID-19 diagnosis (odds ratio [OR]: 2.22; 95% CI [1.15-4.43]; p = 0.020), previous neuromuscular blockers (OR: 2.16; 95% CI [1.15-4.11]; p = 0.017) and higher fentanyl dose (OR: 1.29; 95% CI [1.05-1.60]; p = 0.018) increased the failure chances. Higher BMI (OR: 0.95; 95% CI [0.91-0.99]; p = 0.029), Pao2/Fio2 (OR: 0.87; 95% CI [0.78-0.97]; p = 0.017), and pH (OR: 0.61; 95% CI [0.38-0.96]; p = 0.035) were protective. Failure groups had higher 60-day ventilator dependence (p < 0.001), MV duration (p < 0.0001), and ICU stay (p = 0.001). Patients who failed had higher mortality in COVID-19 group (p < 0.001) but not in the non-COVID-19 (p = 0.083). CONCLUSIONS In patients with AHRF of different etiologies, the failure of the first PSV attempt was 43.7%, and at a higher rate in COVID-19. Independent risk factors included COVID-19 diagnosis, fentanyl dose, previous neuromuscular blockers, acidosis and hypoxemia preceding SAT, whereas higher BMI was protective. Failure was associated with worse outcomes.
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Affiliation(s)
- Joaquin Pérez
- Intensive Care Unit, Sanatorio Anchorena, San Martín, Buenos Aires, Argentina
- Intensive Care Unit, Hospital Carlos G. Durand, Ciudad Autónoma de Buenos Aires, Argentina
| | - Matías Accoce
- Intensive Care Unit, Sanatorio Anchorena, San Martín, Buenos Aires, Argentina
- Intensive Care Unit, Hospital de Quemados "Dr. Arturo Humberto Illia," Ciudad Autónoma de Buenos Aires, Argentina
- Faculta de Medicina y Ciencias de la Salud, Universidad Abierta Interamericana, Ciudad Autónoma de Buenos Aires, Argentina
| | - Javier H Dorado
- Intensive Care Unit, Sanatorio Anchorena, San Martín, Buenos Aires, Argentina
| | - Daniela I Gilgado
- Intensive Care Unit, Sanatorio Anchorena, San Martín, Buenos Aires, Argentina
- Intensive Care Unit, Hospital Carlos G. Durand, Ciudad Autónoma de Buenos Aires, Argentina
| | - Emiliano Navarro
- Respiratory and physical therapy department, Centro del Parque, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gimena P Cardoso
- Intensive Care Unit, Sanatorio Anchorena, San Martín, Buenos Aires, Argentina
- Intensive Care Unit, Hospital Donación Francisco Santojanni, Ciudad Autónoma de Buenos Aires, Argentina
| | - Irene Telias
- Department of Critical Care, Keenan Research Center, Li Ka Shing Institute, St Michael's Hospital, Toronto, Ontario, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- Division of Respirology, Department of Medicine, University Health Network and Sinai Health System, Toronto, Ontario, Canada
| | - Pablo O Rodriguez
- Intensive Care Unit, Hospital Universitario Sede Pombo (Instituto Universitario CEMIC, Centro de Educación Médica e Investigaciones Clínicas), Ciudad Autónoma de Buenos Aires, Argentina
- Pneumonology section, CEMIC, Ciudad Autónoma de Buenos Aires, Argentina
| | - Laurent Brochard
- Department of Critical Care, Keenan Research Center, Li Ka Shing Institute, St Michael's Hospital, Toronto, Ontario, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
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7
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Chen H, Liang M, He Y, Teboul JL, Sun Q, Xie J, Yang Y, Qiu H, Liu L. Inspiratory effort impacts the accuracy of pulse pressure variations for fluid responsiveness prediction in mechanically ventilated patients with spontaneous breathing activity: a prospective cohort study. Ann Intensive Care 2023; 13:72. [PMID: 37592166 PMCID: PMC10435426 DOI: 10.1186/s13613-023-01167-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 08/01/2023] [Indexed: 08/19/2023] Open
Abstract
BACKGROUND Pulse pressure variation (PPV) is unreliable in predicting fluid responsiveness (FR) in patients receiving mechanical ventilation with spontaneous breathing activity. Whether PPV can be valuable for predicting FR in patients with low inspiratory effort is unknown. We aimed to investigate whether PPV can be valuable in patients with low inspiratory effort. METHODS This prospective study was conducted in an intensive care unit at a university hospital and included acute circulatory failure patients receiving volume-controlled ventilation with spontaneous breathing activity. Hemodynamic measurements were collected before and after a fluid challenge. The degree of inspiratory effort was assessed using airway occlusion pressure (P0.1) and airway pressure swing during a whole breath occlusion (ΔPocc) before fluid challenge. Patients were classified as fluid responders if their cardiac output increased by ≥ 10%. Areas under receiver operating characteristic (AUROC) curves and gray zone approach were used to assess the predictive performance of PPV. RESULTS Among the 189 included patients, 53 (28.0%) were defined as responders. A PPV > 9.5% enabled to predict FR with an AUROC of 0.79 (0.67-0.83) in the whole population. The predictive performance of PPV differed significantly in groups stratified by the median value of P0.1 (P0.1 < 1.5 cmH2O and P0.1 ≥ 1.5 cmH2O), but not in groups stratified by the median value of ΔPocc (ΔPocc < - 9.8 cmH2O and ΔPocc ≥ - 9.8 cmH2O). Specifically, in patients with P0.1 < 1.5 cmH2O, PPV was associated with an AUROC of 0.90 (0.82-0.99) compared with 0.68 (0.57-0.79) otherwise (p = 0.0016). The cut-off values of PPV were 10.5% and 9.5%, respectively. Besides, patients with P0.1 < 1.5 cmH2O had a narrow gray zone (10.5-11.5%) compared to patients with P0.1 ≥ 1.5 cmH2O (8.5-16.5%). CONCLUSIONS PPV is reliable in predicting FR in patients who received controlled ventilation with low spontaneous effort, defined as P0.1 < 1.5 cmH2O. Trial registration NCT04802668. Registered 6 February 2021, https://clinicaltrials.gov/ct2/show/record/NCT04802668.
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Affiliation(s)
- Hui Chen
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
- Department of Critical Care Medicine, The First Affiliated Hospital of Soochow University, Soochow University, No. 899 Pinghai Road, Suzhou, 215000 People’s Republic of China
| | - Meihao Liang
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
- Department of Critical Care Medicine, Changsha central hospital, University of South China, No. 161, South Shaoshan Road, Changsha, 410000 Hunan People’s Republic of China
| | - Yuanchao He
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
- Department of Critical Care Medicine, Wuhan first hospital of Hubei Province, No 215 Zhongshan Avenue, Qiaokou District, Wuhan, 430000 People’s Republic of China
| | - Jean-Louis Teboul
- Service de médecine intensive-réanimation, Hôpital de Bicêtre, Université Paris-Saclay, AP-HP, Inserm UMR S_999, Le Kremlin-Bicêtre, France
| | - Qin Sun
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
| | - Jianfen Xie
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
| | - Yi Yang
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
| | - Haibo Qiu
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
| | - Ling Liu
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No. 87, Dingjiaqiao Road, Gulou District, Nanjing, 210009 People’s Republic of China
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Orthmann T, Ltaief Z, Bonnemain J, Kirsch M, Piquilloud L, Liaudet L. Retrospective analysis of factors associated with outcome in veno-venous extra-corporeal membrane oxygenation. BMC Pulm Med 2023; 23:301. [PMID: 37587413 PMCID: PMC10429070 DOI: 10.1186/s12890-023-02591-5] [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: 04/14/2023] [Accepted: 07/31/2023] [Indexed: 08/18/2023] Open
Abstract
BACKGROUND The outcome of Veno-Venous Extracorporeal Membrane Oxygenation (VV-ECMO) in acute respiratory failure may be influenced by patient-related factors, center expertise and modalities of mechanical ventilation (MV) during ECMO. We determined, in a medium-size ECMO center in Switzerland, possible factors associated with mortality during VV-ECMO for acute respiratory failure of various etiologies. METHODS We retrospectively analyzed all patients treated with VV-ECMO in our University Hospital from 2012 to 2019 (pre-COVID era). Demographic variables, severity scores, MV duration before ECMO, pre and on-ECMO arterial blood gases and respiratory variables were collected. The primary outcome was ICU mortality. Data were compared between survivors and non-survivors, and factors associated with mortality were assessed in univariate and multivariate analyses. RESULTS Fifty-one patients (33 ARDS, 18 non-ARDS) were included. ICU survival was 49% (ARDS, 39%; non-ARDS 67%). In univariate analyses, a higher driving pressure (DP) at 24h and 48h on ECMO (whole population), longer MV duration before ECMO and higher DP at 24h on ECMO (ARDS patients), were associated with mortality. In multivariate analyses, ECMO indication, higher DP at 24h on ECMO and, in ARDS, longer MV duration before ECMO, were independently associated with mortality. CONCLUSIONS DP on ECMO and longer MV duration before ECMO (in ARDS) are major, and potentially modifiable, factors influencing outcome during VV-ECMO.
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Affiliation(s)
- Thomas Orthmann
- The Department of Adult Intensive Care Medicine, University Hospital Medical Center, Lausanne, 1011, Switzerland
- The Faculty of Biology and Medicine, University of Lausanne, Lausanne, 1011, Switzerland
| | - Zied Ltaief
- The Department of Adult Intensive Care Medicine, University Hospital Medical Center, Lausanne, 1011, Switzerland
| | - Jean Bonnemain
- The Department of Adult Intensive Care Medicine, University Hospital Medical Center, Lausanne, 1011, Switzerland
| | - Matthias Kirsch
- The Faculty of Biology and Medicine, University of Lausanne, Lausanne, 1011, Switzerland
- The Department of Cardiac Surgery, University Hospital Medical Center, Lausanne, 1011, Switzerland
| | - Lise Piquilloud
- The Department of Adult Intensive Care Medicine, University Hospital Medical Center, Lausanne, 1011, Switzerland
- The Faculty of Biology and Medicine, University of Lausanne, Lausanne, 1011, Switzerland
| | - Lucas Liaudet
- The Department of Adult Intensive Care Medicine, University Hospital Medical Center, Lausanne, 1011, Switzerland.
- The Faculty of Biology and Medicine, University of Lausanne, Lausanne, 1011, Switzerland.
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9
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de Carvalho EB, Battaglini D, Robba C, Malbrain MLNG, Pelosi P, Rocco PRM, Silva PL. Fluid management strategies and their interaction with mechanical ventilation: from experimental studies to clinical practice. Intensive Care Med Exp 2023; 11:44. [PMID: 37474816 PMCID: PMC10359242 DOI: 10.1186/s40635-023-00526-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/31/2023] [Indexed: 07/22/2023] Open
Abstract
Patients on mechanical ventilation may receive intravenous fluids via restrictive or liberal fluid management. A clear and objective differentiation between restrictive and liberal fluid management strategies is lacking in the literature. The liberal approach has been described as involving fluid rates ranging from 1.2 to 12 times higher than the restrictive approach. A restrictive fluid management may lead to hypoperfusion and distal organ damage, and a liberal fluid strategy may result in endothelial shear stress and glycocalyx damage, cardiovascular complications, lung edema, and distal organ dysfunction. The association between fluid and mechanical ventilation strategies and how they interact toward ventilator-induced lung injury (VILI) could potentiate the damage. For instance, the combination of a liberal fluids and pressure-support ventilation, but not pressure control ventilation, may lead to further lung damage in experimental models of acute lung injury. Moreover, under liberal fluid management, the application of high positive end-expiratory pressure (PEEP) or an abrupt decrease in PEEP yielded higher endothelial cell damage in the lungs. Nevertheless, the translational aspects of these findings are scarce. The aim of this narrative review is to provide better understanding of the interaction between different fluid and ventilation strategies and how these interactions may affect lung and distal organs. The weaning phase of mechanical ventilation and the deresuscitation phase are not explored in this review.
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Affiliation(s)
- Eduardo Butturini de Carvalho
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- University of Vassouras, Rio de Janeiro, Brazil
| | | | - Chiara Robba
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Manu L. N. G. Malbrain
- First Department of Anesthesiology and Intensive Therapy, Medical University of Lublin, Lublin, Poland
- International Fluid Academy, Lovenjoel, Belgium
| | - Paolo Pelosi
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Patricia Rieken Macedo Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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10
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Battaglini D, Iavarone IG, Robba C, Ball L, Silva PL, Rocco PRM. Mechanical ventilation in patients with acute respiratory distress syndrome: current status and future perspectives. Expert Rev Med Devices 2023; 20:905-917. [PMID: 37668146 DOI: 10.1080/17434440.2023.2255521] [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: 07/03/2023] [Revised: 08/14/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023]
Abstract
INTRODUCTION Although there has been extensive research on mechanical ventilation for acute respiratory distress syndrome (ARDS), treatment remains mainly supportive. Recent studies and new ventilatory modes have been proposed to manage patients with ARDS; however, the clinical impact of these strategies remains uncertain and not clearly supported by guidelines. The aim of this narrative review is to provide an overview and update on ventilatory management for patients with ARDS. AREAS COVERED This article reviews the literature regarding mechanical ventilation in ARDS. A comprehensive overview of the principal settings for the ventilator parameters involved is provided as well as a report on the differences between controlled and assisted ventilation. Additionally, new modes of assisted ventilation are presented and discussed. The evidence concerning rescue strategies, including recruitment maneuvers and extracorporeal membrane oxygenation support, is analyzed. PubMed, EBSCO, and the Cochrane Library were searched up until June 2023, for relevant literature. EXPERT OPINION Available evidence for mechanical ventilation in cases of ARDS suggests the use of a personalized mechanical ventilation strategy. Although promising, new modes of assisted mechanical ventilation are still under investigation and guidelines do not recommend rescue strategies as the standard of care. Further research on this topic is required.
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Affiliation(s)
- Denise Battaglini
- Anesthesia and Intensive Care, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Ida Giorgia Iavarone
- Anesthesia and Intensive Care, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Chiara Robba
- Anesthesia and Intensive Care, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Lorenzo Ball
- Anesthesia and Intensive Care, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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11
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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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12
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Dianti J, Morris IS, Urner M, Schmidt M, Tomlinson G, Amato MBP, Blanch L, Rubenfeld G, Goligher EC. Linking Acute Physiology to Outcomes in the ICU: Challenges and Solutions for Research. Am J Respir Crit Care Med 2023; 207:1441-1450. [PMID: 36705985 DOI: 10.1164/rccm.202206-1216ci] [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: 06/27/2022] [Accepted: 01/27/2023] [Indexed: 01/28/2023] Open
Abstract
ICU clinicians rely on bedside physiological measurements to inform many routine clinical decisions. Because deranged physiology is usually associated with poor clinical outcomes, it is tempting to hypothesize that manipulating and intervening on physiological parameters might improve outcomes for patients. However, testing these hypotheses through mathematical models of the relationship between physiology and outcomes presents a number of important methodological challenges. These models reflect the theories of the researcher and can therefore be heavily influenced by one's assumptions and background beliefs. Model building must therefore be approached with great care and forethought, because failure to consider relevant sources of measurement error, confounding, coupling, and time dependency or failure to assess the direction of causality for associations of interest before modeling may give rise to spurious results. This paper outlines the main challenges in analyzing and interpreting these models and offers potential solutions to address these challenges.
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Affiliation(s)
- Jose Dianti
- Interdepartmental Division of Critical Care Medicine
- University Health Network/Sinai Health System
| | - Idunn S Morris
- Interdepartmental Division of Critical Care Medicine
- University Health Network/Sinai Health System
- Department of Intensive Care Medicine, Nepean Hospital, Sydney, Australia
| | - Martin Urner
- Interdepartmental Division of Critical Care Medicine
- Department of Anesthesiology and Pain Medicine
| | | | - George Tomlinson
- Division of Respirology, Department of Medicine, University Health Network and Sinai Health System, Toronto, Ontario, Canada
| | - Marcelo B P Amato
- Laboratório de Pneumologia LIM-09, Disciplina de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Brazil
| | - Lluis Blanch
- Critical Care Center, Institut d'Investigacio i Innovacio Parc Taulí I3PT-CERCA, Parc Taulí Hospital Universitari, Universitat Autonoma de Barcelona, Sabadell, Spain
- Centro de Investigacion Biomedica en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain
- Universitat Autonoma de Barcelona, Parc Taulí 1, Sabadell, Spain
| | - Gordon Rubenfeld
- Interdepartmental Division of Critical Care Medicine
- Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; and
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine
- University Health Network/Sinai Health System
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Toronto General Hospital Research Institute, Toronto, Ontario, Canada
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Pham T, Heunks L, Bellani G, Madotto F, Aragao I, Beduneau G, Goligher EC, Grasselli G, Laake JH, Mancebo J, Peñuelas O, Piquilloud L, Pesenti A, Wunsch H, van Haren F, Brochard L, Laffey JG, Acharya SP, Amin P, Arabi Y, Aragao I, Bauer P, Beduneau G, Beitler J, Berkius J, Bugedo G, Camporota L, Cerny V, Cho YJ, Clarkson K, Estenssoro E, Goligher E, Grasselli G, Gritsan A, Hashemian SM, Hermans G, Heunks LM, Jovanovic B, Kurahashi K, Laake JH, Matamis D, Moerer O, Molnar Z, Ozyilmaz E, Panka B, Papali A, Peñuelas Ó, Perbet S, Piquilloud L, Qiu H, Razek AA, Rittayamai N, Roldan R, Serpa Neto A, Szuldrzynski K, Talmor D, Tomescu D, Van Haren F, Villagomez A, Zeggwagh AA, Abe T, Aboshady A, Acampo-de Jong M, Acharya S, Adderley J, Adiguzel N, Agrawal VK, Aguilar G, Aguirre G, Aguirre-Bermeo H, Ahlström B, Akbas T, Akker M, Al Sadeh G, Alamri S, Algaba A, Ali M, Aliberti A, Allegue JM, Alvarez D, Amador J, Andersen FH, Ansari S, Apichatbutr Y, Apostolopoulou O, Arabi Y, Arellano D, Arica M, Arikan H, Arinaga K, Arnal JM, Asano K, Asín-Corrochano M, Avalos Cabrera JM, Avila Fuentes S, Aydemir S, Aygencel G, Azevedo L, Bacakoglu F, Badie J, Baedorf Kassis E, Bai G, Balaraj G, Ballico B, Banner-Goodspeed V, Banwarie P, Barbieri R, Baronia A, Barrett J, Barrot L, Barrueco-Francioni JE, Barry J, Bauer P, Bawangade H, Beavis S, Beck E, Beehre N, Belenguer Muncharaz A, Bellani G, Belliato M, Bellissima A, Beltramelli R, Ben Souissi A, Benitez-Cano A, Benlamin M, Benslama A, Bento L, Benvenuti D, Berkius J, Bernabe L, Bersten A, Berta G, Bertini P, Bertram-Ralph E, Besbes M, Bettini LR, Beuret P, Bewley J, Bezzi M, Bhakhtiani L, Bhandary R, Bhowmick K, Bihari S, Bissett B, Blythe D, Bocher S, Boedjawan N, Bojanowski CM, Boni E, Boraso S, Borelli M, Borello S, Borislavova M, Bosma KJ, Bottiroli M, Boyd O, Bozbay S, Briva A, Brochard L, Bruel C, Bruni A, Buehner U, Bugedo G, Bulpa P, Burt K, Buscot M, Buttera S, Cabrera J, Caccese R, Caironi P, Canchos Gutierrez I, Canedo N, Cani A, Cappellini I, Carazo J, Cardonnet LP, Carpio D, Carriedo D, Carrillo R, Carvalho J, Caser E, Castelli A, Castillo Quintero M, Castro H, Catorze N, Cengiz M, Cereijo E, Ceunen H, Chaintoutis C, Chang Y, Chaparro G, Chapman C, Chau S, Chavez CE, Chelazzi C, Chelly J, Chemouni F, Chen K, Chena A, Chiarandini P, Chilton P, Chiumello D, Cho YJ, Chou-Lie Y, Chudeau N, Cinel I, Cinnella G, Clark M, Clark T, Clarkson K, Clementi S, Coaguila L, Codecido AJ, Collins A, Colombo R, Conde J, Consales G, Cook T, Coppadoro A, Cornejo R, Cortegiani A, Coxo C, Cracchiolo AN, Crespo Ramirez M, Crova P, Cruz J, Cubattoli L, Çukurova Z, Curto F, Czempik P, D'Andrea R, da Silva Ramos F, Dangers L, Danguy des Déserts M, Danin PE, Dantas F, Daubin C, Dawei W, de Haro C, de Jesus Montelongo F, De Mendoza D, de Pablo R, De Pascale G, De Rosa S, Decavèle M, Declercq PL, Deicas A, del Carmen Campos Moreno M, Dellamonica J, Delmas B, Demirkiran O, Demirkiran H, Dendane T, di Mussi R, Diakaki C, Diaz A, Diaz W, Dikmen Y, Dimoula A, Doble P, Doha N, Domingos G, Dres M, Dries D, Duggal A, Duke G, Dunts P, Dybwik K, Dykyy M, Eckert P, Efe S, Elatrous S, Elay G, Elmaryul AS, Elsaadany M, Elsayed H, Elsayed S, Emery M, Ena S, Eng K, Englert JA, Erdogan E, Ergin Ozcan P, Eroglu E, Escobar M, Esen F, Esen Tekeli A, Esquivel A, Esquivel Gallegos H, Ezzouine H, Facchini A, Faheem M, Fanelli V, Farina MF, Fartoukh M, Fehrle L, Feng F, Feng Y, Fernandez I, Fernandez B, Fernandez-Rodriguez ML, Ferrando C, Ferreira da Silva MJ, Ferreruela M, Ferrier J, Flamm Zamorano MJ, Flood L, Floris L, Fluckiger M, Forteza C, Fortunato A, Frans E, Frattari A, Fredes S, Frenzel T, Fumagalli R, Furche MA, Fusari M, Fysh E, Galeas-Lopez JL, Galerneau LM, Garcia A, Garcia MF, Garcia E, Garcia Olivares P, Garlicki J, Garnero A, Garofalo E, Gautam P, Gazenkampf A, Gelinotte S, Gelormini D, Ghrenassia E, Giacomucci A, Giannoni R, Gigante A, Glober N, Gnesin P, Gollo Y, Gomaa D, Gomero Paredes R, Gomes R, Gomez RA, Gomez O, Gomez A, Gondim L, Gonzalez M, Gonzalez I, Gonzalez-Castro A, Gordillo Romero O, Gordo F, Gouin P, Graf Santos J, Grainne R, Grando M, Granov Grabovica S, Grasselli G, Grasso S, Grasso R, Grimmer L, Grissom C, Gritsan A, Gu Q, Guan XD, Guarracino F, Guasch N, Guatteri L, Gueret R, Guérin C, Guerot E, Guitard PG, Gül F, Gumus A, Gurjar M, Gutierrez P, Hachimi A, Hadzibegovic A, Hagan S, Hammel C, Han Song J, Hanlon G, Hashemian SM, Heines S, Henriksson J, Herbrecht JE, Heredia Orbegoso GO, Hermans G, Hermon A, Hernandez R, Hernandez C, Herrera L, Herrera-Gutierrez M, Heunks L, Hidalgo J, Hill D, Holmquist D, Homez M, Hongtao X, Hormis A, Horner D, Hornos MC, Hou M, House S, Housni B, Hugill K, Humphreys S, Humbert L, Hunter S, Hwa Young L, Iezzi N, Ilutovich S, Inal V, Innes R, Ioannides P, Iotti GA, Ippolito M, Irie H, Iriyama H, Itagaki T, Izura J, Izza S, Jabeen R, Jamaati H, Jamadarkhana S, Jamoussi A, Jankowski M, Jaramillo LA, Jeon K, Jeong Lee S, Jeswani D, Jha S, Jiang L, Jing C, Jochmans S, Johnstad BA, Jongmin L, Joret A, Jovanovic B, Junhasavasdikul D, Jurado MT, Kam E, Kamohara H, Kane C, Kara I, Karakurt S, Karnjanarachata C, Kataoka J, Katayama S, Kaushik S, Kelebek Girgin N, Kerr K, Kerslake I, Khairnar P, Khalid A, Khan A, Khanna AK, Khorasanee R, Kienhorst D, Kirakli C, Knafelj R, Kol MK, Kongpolprom N, Kopitko C, Korkmaz Ekren P, Kubisz-Pudelko A, Kulcsar Z, Kumasawa J, Kurahashi K, Kuriyama A, Kutchak F, Laake JH, Labarca E, Labat F, Laborda C, Laca Barrera MA, Lagache L, Landaverde Lopez A, Lanspa M, Lascari V, Le Meur M, Lee SH, Lee YJ, Lee J, Lee WY, Lee J, Legernaes T, Leiner T, Lemiale V, Leonor T, Lepper PM, Li D, Li H, Li O, Lima AR, Lind D, Litton E, Liu N, Liu L, Liu J, Llitjos JF, Llorente B, Lopez R, Lopez CE, Lopez Nava C, Lovazzano P, Lu M, Lucchese F, Lugano M, Lugo Goytia G, Luo H, Lynch C, Macheda S, Madrigal Robles VH, Maggiore SM, Magret Iglesias M, Malaga P, Mallapura Maheswarappa H, Malpartida G, Malyarchikov A, Mansson H, Manzano A, Marey I, Marin N, Marin MDC, Markman E, Martin F, Martin A, Martin Dal Gesso C, Martinez F, Martínez-Fidalgo C, Martin-Loeches I, Mas A, Masaaki S, Maseda E, Massa E, Mattsson A, Maugeri J, McCredie V, McCullough J, McGuinness S, McKown A, Medve L, Mei C, Mellado Artigas R, Mendes V, Mervat MKE, Michaux I, Mikhaeil M, Milagros O, Milet I, Millan MT, Minwei Z, Mirabella L, Mishra S, Mistraletti G, Mochizuki K, Moerer O, Moghal A, Mojoli F, Molin A, Molnar Z, Montiel R, Montini L, Monza G, Mora Aznar M, Morakul S, Morales M, Moreno Torres D, Morocho Tutillo DR, Motherway C, Mouhssine D, Mouloudi E, Muñoz T, Munoz de Cabo C, Mustafa M, Muthuchellappan R, Muthukrishnan M, Muttini S, Nagata I, Nahar D, Nakanishi M, Nakayama I, Namendys-Silva SA, Nanchal R, Nandakumar S, Nasi A, Nasir K, Navalesi P, Naz Aslam T, Nga Phan T, Nichol A, Niiyama S, Nikolakopoulou S, Nikolic E, Nitta K, Noc M, Nonas S, Nseir S, Nur Soyturk A, Obata Y, Oeckler R, Oguchi M, Ohshimo S, Oikonomou M, Ojados A, Oliveira MT, Oliveira Filho W, Oliveri C, Olmos A, Omura K, Orlandi MC, Orsenigo F, Ortiz-Ruiz De Gordoa L, Ota K, Ovalle Olmos R, Öveges N, Oziemski P, Ozkan Kuscu O, Özyilmaz E, Pachas Alvarado F, Pagella G, Palaniswamy V, Palazon Sanchez EL, Palmese S, Pan G, Pan W, Panka B, Papanikolaou M, Papavasilopoulou T, Parekh A, Parke R, Parrilla FJ, Parrilla D, Pasha T, Pasin L, Patão L, Patel M, Patel G, Pati BK, Patil J, Pattnaik S, Paul D, Pavesi M, Pavlotsky VA, Paz G, Paz E, Pecci E, Pellegrini C, Peña Padilla AG, Perchiazzi G, Pereira T, Pereira V, Perez M, Perez Calvo C, Perez Cheng M, Perez Maita R, Pérez-Araos R, Perez-Teran P, Perez-Torres D, Perkins G, Persona P, Petnak T, Petrova M, Pham T, Philippart F, Picetti E, Pierucci E, Piervincenzi E, Pinciroli R, Pintado MC, Piquilloud L, Piraino T, Piras S, Piras C, Pirompanich P, Pisani L, Platas E, Plotnikow G, Porras W, Porta V, Portilla M, Portugal J, Povoa P, Prat G, Pratto R, Preda G, Prieto I, Prol-Silva E, Pugh R, Qi Y, Qian C, Qin T, Qiu H, Qu H, Quintana T, Quispe Sierra R, Quispe Soto R, Rabbani R, Rabee M, Rabie A, Rahe Pereira MA, Rai A, Raj Ashok S, Rajab M, Ramdhani N, Ramey E, Ranieri M, Rathod D, Ray B, Redwanul Huq SM, Regli A, Reina R, Resano Sarmiento N, Reynaud F, Rialp G, Ricart P, Rice T, Richardson A, Rieder M, Rinket M, Rios F, Rios F, Risso Vazquez A, Rittayamai N, Riva I, Rivette M, Roca O, Roche-Campo F, Rodriguez C, Rodriguez G, Rodriguez Gonzalez D, Rodriguez Tucto XY, Rogers A, Romano ME, Rørtveit L, Rose A, Roux D, Rouze A, Rubatto Birri PN, Ruilan W, Ruiz Robledo A, Ruiz-Aguilar AL, Sadahiro T, Saez I, Sagardia J, Saha R, Saha R, Saiphoklang N, Saito S, Salem M, Sales G, Salgado P, Samavedam S, Sami Mebazaa M, Samuelsson L, San Juan Roman N, Sanchez P, Sanchez-Ballesteros J, Sandoval Y, Sani E, Santos M, Santos C, Sanui M, Saravanabavan L, Sari S, Sarkany A, Sauneuf B, Savioli M, Sazak H, Scano R, Schneider F, Schortgen F, Schultz MJ, Schwarz GL, Seçkin Yücesoy F, Seely A, Seiler F, Seker Tekdos Y, Seok Chan K, Serano L, Serednicki W, Serpa Neto A, Setten M, Shah A, Shah B, Shang Y, Shanmugasundaram P, Shapovalov K, Shebl E, Shiga T, Shime N, Shin P, Short J, Shuhua C, Siddiqui S, Silesky Jimenez JI, Silva D, Silva Sales B, Simons K, Sjøbø BÅ, Slessor D, Smiechowicz J, Smischney N, Smith P, Smith T, Smith M, Snape S, Snyman L, Soetens F, Sook Hong K, Sosa Medellin MÁ, Soto G, Souloy X, Sousa E, Sovatzis S, Sozutek D, Spadaro S, Spagnoli M, Spångfors M, Spittle N, Spivey M, Stapleton A, Stefanovic B, Stephenson L, Stevenson E, Strand K, Strano MT, Straus S, Sun C, Sun R, Sundaram V, SunPark T, Surlemont E, Sutherasan Y, Szabo Z, Szuldrzynski K, Tainter C, Takaba A, Tallott M, Tamasato T, Tang Z, Tangsujaritvijit V, Taniguchi L, Taniguchi D, Tarantino F, Teerapuncharoen K, Temprano S, Terragni P, Terzi N, Thakur A, Theerawit P, Thille AW, Thomas M, Thungtitigul P, Thyrault M, Tilouch N, Timenetsky K, Tirapu J, Todeschini M, Tomas R, Tomaszewski C, Tonetti T, Tonnelier A, Trinder J, Trongtrakul K, Truwit J, Tsuei B, Tulaimat A, Turan S, Turkoglu M, Tyagi S, Ubeda A, Vagginelli F, Valenti MF, Vallverdu I, Van Axel A, van den Hul I, van der Hoeven H, Van Der Meer N, Van Haren F, Vanhoof M, Vargas-Ordoñez M, Vaschetto R, Vascotto E, Vatsik M, Vaz A, Vazquez-Sanchez A, Ventura S, Vermeijden JW, Vidal A, Vieira J, Vilela Costa Pinto B, Villagomez A, Villagra A, Villegas Succar C, Vinorum OG, Vitale G, Vj R, Vochin A, Voiriot G, Volta CA, von Seth M, Wajdi M, Walsh D, Wang S, Wardi G, Ween-Velken NC, Wei BL, Weller D, Welsh D, Welters I, Wert M, Whiteley S, Wilby E, Williams E, Williams K, Wilson A, Wojtas J, Won Huh J, Wrathall D, Wright C, Wu JF, Xi G, Xing ZJ, Xu H, Yamamoto K, Yan J, Yáñez J, Yang X, Yates E, Yazicioglu Mocin O, Ye Z, Yildirim F, Yoshida N, Yoshido HHL, Young Lee B, Yu R, Yu G, Yu T, Yuan B, Yuangtrakul N, Yumoto T, Yun X, Zakalik G, Zaki A, Zalba-Etayo B, Zambon M, Zang B, Zani G, Zarka J, Zerbi SM, Zerman A, Zetterquist H, Zhang J, Zhang H, Zhang W, Zhang G, Zhang W, Zhao H, Zheng J, Zhu B, Zumaran R. Weaning from mechanical ventilation in intensive care units across 50 countries (WEAN SAFE): a multicentre, prospective, observational cohort study. THE LANCET. RESPIRATORY MEDICINE 2023; 11:465-476. [PMID: 36693401 DOI: 10.1016/s2213-2600(22)00449-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 01/23/2023]
Abstract
BACKGROUND Current management practices and outcomes in weaning from invasive mechanical ventilation are poorly understood. We aimed to describe the epidemiology, management, timings, risk for failure, and outcomes of weaning in patients requiring at least 2 days of invasive mechanical ventilation. METHODS WEAN SAFE was an international, multicentre, prospective, observational cohort study done in 481 intensive care units in 50 countries. Eligible participants were older than 16 years, admitted to a participating intensive care unit, and receiving mechanical ventilation for 2 calendar days or longer. We defined weaning initiation as the first attempt to separate a patient from the ventilator, successful weaning as no reintubation or death within 7 days of extubation, and weaning eligibility criteria based on positive end-expiratory pressure, fractional concentration of oxygen in inspired air, and vasopressors. The primary outcome was the proportion of patients successfully weaned at 90 days. Key secondary outcomes included weaning duration, timing of weaning events, factors associated with weaning delay and weaning failure, and hospital outcomes. This study is registered with ClinicalTrials.gov, NCT03255109. FINDINGS Between Oct 4, 2017, and June 25, 2018, 10 232 patients were screened for eligibility, of whom 5869 were enrolled. 4523 (77·1%) patients underwent at least one separation attempt and 3817 (65·0%) patients were successfully weaned from ventilation at day 90. 237 (4·0%) patients were transferred before any separation attempt, 153 (2·6%) were transferred after at least one separation attempt and not successfully weaned, and 1662 (28·3%) died while invasively ventilated. The median time from fulfilling weaning eligibility criteria to first separation attempt was 1 day (IQR 0-4), and 1013 (22·4%) patients had a delay in initiating first separation of 5 or more days. Of the 4523 (77·1%) patients with separation attempts, 2927 (64·7%) had a short wean (≤1 day), 457 (10·1%) had intermediate weaning (2-6 days), 433 (9·6%) required prolonged weaning (≥7 days), and 706 (15·6%) had weaning failure. Higher sedation scores were independently associated with delayed initiation of weaning. Delayed initiation of weaning and higher sedation scores were independently associated with weaning failure. 1742 (31·8%) of 5479 patients died in the intensive care unit and 2095 (38·3%) of 5465 patients died in hospital. INTERPRETATION In critically ill patients receiving at least 2 days of invasive mechanical ventilation, only 65% were weaned at 90 days. A better understanding of factors that delay the weaning process, such as delays in weaning initiation or excessive sedation levels, might improve weaning success rates. FUNDING European Society of Intensive Care Medicine, European Respiratory Society.
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Affiliation(s)
- Tài Pham
- Service de Médecine Intensive-Réanimation, AP-HP, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Groupe de Recherche CARMAS, Hôpitaux Universitaires Paris-Saclay, Le Kremlin-Bicêtre, France; Université Paris-Saclay, UVSQ, Université Paris-Sud, Inserm U1018, Equipe d'Epidémiologie Respiratoire Intégrative, CESP, 94807, Villejuif, France
| | - Leo Heunks
- Department of Intensive Care Medicine, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Giacomo Bellani
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy; Department of Emergency and Intensive Care, University Hospital San Gerardo, Monza, Italy
| | - Fabiana Madotto
- Department of Anaesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Irene Aragao
- Department of Intensive Care Medicine, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - Gaëtan Beduneau
- Normandie University, UNIROUEN, UR 3830, CHU Rouen, Department of Medical Intensive Care, F-76000 Rouen, France
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Medicine, Division of Respirology, Toronto General Hospital Research Institute University Health Network, Toronto, Canada
| | - Giacomo Grasselli
- Department of Anaesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Jon Henrik Laake
- Department of Anaesthesiology and Department of Research and Development, Division of Critical Care and Emergencies, Oslo University Hospital, Oslo, Norway
| | - Jordi Mancebo
- Department of Intensive Care Medicine, Hospital Universitari Sant Pau, Barcelona, Spain
| | - Oscar Peñuelas
- Intensive Care Unit, Hospital Universitario de Getafe, Madrid, Spain; Centro de Investigación Biomédica en Red, CIBER de Enfermedades Respiratorias, CIBERES, Madrid, Spain
| | - Lise Piquilloud
- Adult Intensive Care Unit, University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Antonio Pesenti
- Department of Anaesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Hannah Wunsch
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Frank van Haren
- College of Health and Medicine, Australian National University, Canberra, ACT, Australia; Intensive Care Unit, St George Hospital, Sydney, NSW, Australia
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - John G Laffey
- Anaesthesia and Intensive Care Medicine, School of Medicine, Clinical Sciences Institute, Galway University Hospitals, Galway, Ireland; School of Medicine, Regenerative Medicine Institute (REMEDI) at CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway, Ireland.
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Sklienka P, Frelich M, Burša F. Patient Self-Inflicted Lung Injury-A Narrative Review of Pathophysiology, Early Recognition, and Management Options. J Pers Med 2023; 13:593. [PMID: 37108979 PMCID: PMC10146629 DOI: 10.3390/jpm13040593] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/22/2023] [Accepted: 03/27/2023] [Indexed: 03/31/2023] Open
Abstract
Patient self-inflicted lung injury (P-SILI) is a life-threatening condition arising from excessive respiratory effort and work of breathing in patients with lung injury. The pathophysiology of P-SILI involves factors related to the underlying lung pathology and vigorous respiratory effort. P-SILI might develop both during spontaneous breathing and mechanical ventilation with preserved spontaneous respiratory activity. In spontaneously breathing patients, clinical signs of increased work of breathing and scales developed for early detection of potentially harmful effort might help clinicians prevent unnecessary intubation, while, on the contrary, identifying patients who would benefit from early intubation. In mechanically ventilated patients, several simple non-invasive methods for assessing the inspiratory effort exerted by the respiratory muscles were correlated with respiratory muscle pressure. In patients with signs of injurious respiratory effort, therapy aimed to minimize this problem has been demonstrated to prevent aggravation of lung injury and, therefore, improve the outcome of such patients. In this narrative review, we accumulated the current information on pathophysiology and early detection of vigorous respiratory effort. In addition, we proposed a simple algorithm for prevention and treatment of P-SILI that is easily applicable in clinical practice.
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Affiliation(s)
- Peter Sklienka
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
- Institute of Physiology and Pathophysiology, Department of Intensive Care Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
| | - Michal Frelich
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
| | - Filip Burša
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
- Institute of Physiology and Pathophysiology, Department of Intensive Care Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
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Wang Y, Feng C, Fu J, Liu D. Clinical Application of Ultrasound-Guided Internal Branch of Superior Laryngeal Nerve Block in Patients with Severe COPD Undergoing Awake Fibreoptic Nasotracheal Intubation: A Randomized Controlled Clinical Trial. Int J Chron Obstruct Pulmon Dis 2023; 18:521-532. [PMID: 37056682 PMCID: PMC10086219 DOI: 10.2147/copd.s399513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/27/2023] [Indexed: 04/15/2023] Open
Abstract
Purpose The aim was to investigate the time for intubation, adverse events and the comfort score of ultrasound-guided internal branch of superior laryngeal nerve block in patients with severe chronic obstructive pulmonary disorder (COPD) undergoing awake fibreoptic nasotracheal intubation. Methods Sixty patients with COPD who needed awake fibreoptic nasotracheal intubation were randomly and evenly divided into the ultrasound-guided internal branch of the superior laryngeal nerve block group (group S) and the control group (group C). All patients received procedural sedation with dexmedetomidine and adequate topical anaesthesia of the upper respiratory tract. Then, bilateral block was performed (with 2 mL of 2% lidocaine or the same volume of saline) followed by fibreoptic nasotracheal intubation. The primary outcomes were time for intubation, adverse reactions and comfort score. The secondary outcomes were haemodynamic changes and serum norepinephrine (NE) and adrenaline (AD) concentrations immediately before intubation (T0); immediately after intubation to the laryngopharynx (T1); and immediately (T2), 5 min (T3) and 10 min (T4) after intubation between the groups. Results Compared with group C, the time for intubation, the incidence of adverse reactions and the comfort score in group S were significantly lower (P<0.01). Compared with T0, the mean arterial pressure (MAP), heart rate (HR), NE and AD were significantly higher at T1 - T4 in group C (P<0.05), but were not obviously higher at T1 - T4 in group S (P>0.05). MAP, HR, NE and AD at T1-T4 were significantly lower in group S than in group C (P<0.05). Conclusion Ultrasound-guided internal branch of the superior laryngeal nerve block can effectively shorten the time for intubation, reduce the incidence of adverse reactions, improve comfort score, maintain considerable haemodynamic stability and inhibit stress response in patients with severe COPD undergoing awake fibreoptic nasotracheal intubation.
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Affiliation(s)
- Yongbin Wang
- Department of Respiratory Medicine, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, People’s Republic of China
| | - Chang Feng
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, People’s Republic of China
| | - Jia Fu
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, People’s Republic of China
| | - Dongyi Liu
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, People’s Republic of China
- Correspondence: Dongyi Liu, Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, 247 Bei Yuan Street, Jinan, 250033, People’s Republic of China, Tel +86-17660085565, Email
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Hatozaki C, Sakuramoto H, Ouchi A, Shimojo N, Inoue Y. Early Light Sedation Increased the Duration of Mechanical Ventilation in Patients With Severe Lung Injury. SAGE Open Nurs 2023; 9:23779608231206761. [PMID: 37860159 PMCID: PMC10583523 DOI: 10.1177/23779608231206761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 09/19/2023] [Accepted: 09/23/2023] [Indexed: 10/21/2023] Open
Abstract
Introduction The international guidelines recommend light sedation management for patients receiving mechanical ventilation. One of the benefits of light sedation management during mechanical ventilation is the preservation of spontaneous breathing, which leads to improved gas-exchange and patient outcomes. Conversely, recent experimental animal studies have suggested that strong spontaneous breathing effort may cause worsening of lung injury, especially in severe lung injury cases. The association between depth of sedation and patient outcomes may depend on the severity of lung injury. Objective This study aimed to describe the patients' clinical outcomes under deep or light sedation during the first 48 h of mechanical ventilation and investigate the association of light sedation on patient outcomes for each severity of lung injury. Methods The researchers performed a retrospective observational study at a university hospital in Japan. Patients aged ≥20 years, who received mechanical ventilation for at least 48 h were enrolled. Results A total of 413 patient cases were analyzed. Light sedation was associated with significantly shorter 28-day ventilator-free days compared with deep sedation in patients with severe lung injury (0 [IQR 0-5] days vs. 16 [0-19] days, P = .038). In the groups of patients with moderate and mild lung injury, the sedation depth was not associated with ventilator-free days. After adjusting for the positive end-expiratory pressure and APACHE II score, it was found that light sedation decreased the number of ventilator-free days in patients with severe lung injury (-10.8 days, 95% CI -19.2 to -2.5, P = .012). Conclusion Early light sedation for severe lung injury may be associated with fewer ventilator-free days.
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Affiliation(s)
- Chie Hatozaki
- Intensive Care Unit, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
| | - Hideaki Sakuramoto
- Department of Critical care and Disaster Nursing, Japanese Red Cross Kyushu International College of Nursing, Munakata, Fukuoka, Japan
| | - Akira Ouchi
- Department of Adult Health Nursing, College of Nursing, Ibaraki Christian University, Hitachi, Ibaraki, Japan
| | - Nobutake Shimojo
- Faculty of Medicine, Department of Emergency and Critical Care Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoshiaki Inoue
- Faculty of Medicine, Department of Emergency and Critical Care Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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17
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Spontaneous Breathing and Pendelluft in Patients with Acute Lung Injury: A Narrative Review. J Clin Med 2022; 11:jcm11247449. [PMID: 36556064 PMCID: PMC9783194 DOI: 10.3390/jcm11247449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/10/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is characterized by acute-onset rapid-deteriorating inflammatory lung injury. Although the preservation of spontaneous breathing may have physiological benefits in oxygenation, increasing evidence shows that vigorous spontaneous breathing may aggravate lung injury (i.e., patient self-inflicted lung injury). Increased lung stress and pendelluft, which is defined as intrapulmonary gas redistribution without a significant change in tidal volume, are important mechanisms of patient self-inflicted lung injury. The presence of pendelluft may be considered a surrogate marker of vigorous inspiratory effort, which can cause the dependent lung to overstretch. In this review, we summarized three major methods for electrical impedance tomography-based pendelluft monitoring. Future studies are warranted to compare and validate the different methods of pendelluft estimation in patients with ARDS.
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de Carvalho EB, Fonseca ACF, Magalhães R, Pinto EF, Samary CDS, Antunes MA, Baldavira CM, da Silveira LKR, Teodoro WR, de Abreu MG, Capelozzi VL, Felix NS, Pelosi P, Rocco PRM, Silva PL. Effects of different fluid management on lung and kidney during pressure-controlled and pressure-support ventilation in experimental acute lung injury. Physiol Rep 2022; 10:e15429. [PMID: 36065867 PMCID: PMC9446390 DOI: 10.14814/phy2.15429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 07/22/2022] [Accepted: 07/29/2022] [Indexed: 04/24/2023] Open
Abstract
Optimal fluid management is critical during mechanical ventilation to mitigate lung damage. Under normovolemia and protective ventilation, pulmonary tensile stress during pressure-support ventilation (PSV) results in comparable lung protection to compressive stress during pressure-controlled ventilation (PCV) in experimental acute lung injury (ALI). It is not yet known whether tensile stress can lead to comparable protection to compressive stress in ALI under a liberal fluid strategy (LF). A conservative fluid strategy (CF) was compared with LF during PSV and PCV on lungs and kidneys in an established model of ALI. Twenty-eight male Wistar rats received endotoxin intratracheally. After 24 h, they were treated with CF (minimum volume of Ringer's lactate to maintain normovolemia and mean arterial pressure ≥70 mmHg) or LF (~4 times higher than CF) combined with PSV or PCV (VT = 6 ml/kg, PEEP = 3 cmH2 O) for 1 h. Nonventilated animals (n = 4) were used for molecular biology analyses. CF-PSV compared with LF-PSV: (1) decreased the diffuse alveolar damage score (10 [7.8-12] vs. 25 [23-31.5], p = 0.006), mainly due to edema in axial and alveolar parenchyma; (2) increased birefringence for occludin and claudin-4 in lung tissue and expression of zonula-occludens-1 and metalloproteinase-9 in lung. LF compared with CF reduced neutrophil gelatinase-associated lipocalin and interleukin-6 expression in the kidneys in PSV and PCV. In conclusion, CF compared with LF combined with PSV yielded less lung epithelial cell damage in the current model of ALI. However, LF compared with CF resulted in less kidney injury markers, regardless of the ventilatory strategy.
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Affiliation(s)
- Eduardo Butturini de Carvalho
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
- University of VassourasVassourasRJBrazil
| | - Ana Carolina Fernandes Fonseca
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Raquel Ferreira Magalhães
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Eliete Ferreira Pinto
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Cynthia dos Santos Samary
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Mariana Alves Antunes
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | | | | | | | - Marcelo Gama de Abreu
- Pulmonary Engineering Group, Department of Anaesthesiology and Intensive Care Therapy, Technische Universität DresdenUniversity Hospital Carl Gustav CarusDresdenGermany
- Department of Intensive Care and Resuscitation, Anesthesiology InstituteCleveland ClinicClevelandOhioUSA
- Department of Outcomes Research, Anesthesiology InstituteCleveland ClinicClevelandOhioUSA
| | - Vera Luiza Capelozzi
- Department of Pathology, School of MedicineUniversity of São PauloSão PauloBrazil
| | - Nathane Santanna Felix
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated DiagnosticsUniversity of GenoaGenoaItaly
- Anesthesia and Critical Care, San Martino Policlinico HospitalIRCCS for Oncology and NeurosciencesGenoaItaly
| | - Patrícia Rieken Macêdo Rocco
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas FilhoFederal University of Rio de JaneiroRio de JaneiroRJBrazil
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19
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Zhou L, Yang R, Xue C, Chen Z, Jiang W, He S, Zhang X. Biphasic positive airway pressure spontaneous breathing attenuates lung injury in an animal model of severe acute respiratory distress syndrome. BMC Anesthesiol 2022; 22:228. [PMID: 35842600 PMCID: PMC9287822 DOI: 10.1186/s12871-022-01763-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 07/05/2022] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE To compare the effects of unassisted spontaneous breathing (SB) and complete muscle paralysis (PC) on early severe acute respiratory distress syndrome (ARDS) in an animal model, and to explore the possibility of biphasic positive airway pressure (BIPAP) as lung protective ventilation support for patients in the early stage of severe ARDS. METHODS Twelve healthy beagle dogs between the ages of 10 and 15 months were randomly divided into two groups: the SB group (BIPAPSB) and the PC group (BIPAPPC). Arterial blood samples were drawn before modelling. Arterial blood gas analysis and mechanical tests were conducted. The animal model of severe ARDS was established using a deep intravenous injection of oleic acid, and BIPAP ventilation was performed for 8 hours. Lung tissue and blood were taken to detect lung function, inflammatory reactions and degree of pathological damage. RESULTS At the beginning of the experiment, there was no significant difference in the arterial blood gas analysis between the two groups (p > 0.05). After successful modelling, the oxygenation index and the end-expiratory lung volume in the SB group were significantly higher than those in the PC group 8 hours after MV. Pathologically, the wet-dry ratio and pathological score of the PC group were higher than those of the SB group; the lung injury in the gravity-dependent area in the SB group was less than that in the PC group (p< 0.05). CONCLUSIONS In the early stage of severe ARDS induced by oleic acid, compared with PC, retention of the BIPAP mode of SB can reduce the risk of lung injury and improve respiratory function.
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Affiliation(s)
- Leilei Zhou
- School of Clinical Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Rui Yang
- Department of Internal Medicine, Guiyang First People's Hospital, Guiyang, China
| | - Chunju Xue
- School of Clinical Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Zongyu Chen
- School of Clinical Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Wenqing Jiang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Shuang He
- School of Clinical Medicine, Guizhou Medical University, Guiyang, 550004, China
| | - Xianming Zhang
- Department of Respiratory and Critical Care Medicine, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China.
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20
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Abstract
OBJECTIVE To describe, through a narrative review, the physiologic principles underlying electrical impedance tomography, and its potential applications in managing acute respiratory distress syndrome (ARDS). To address the current evidence supporting its use in different clinical scenarios along the ARDS management continuum. DATA SOURCES We performed an online search in Pubmed to review articles. We searched MEDLINE, Cochrane Central Register, and clinicaltrials.gov for controlled trials databases. STUDY SELECTION Selected publications included case series, pilot-physiologic studies, observational cohorts, and randomized controlled trials. To describe the rationale underlying physiologic principles, we included experimental studies. DATA EXTRACTION Data from relevant publications were reviewed, analyzed, and its content summarized. DATA SYNTHESIS Electrical impedance tomography is an imaging technique that has aided in understanding the mechanisms underlying multiple interventions used in ARDS management. It has the potential to monitor and predict the response to prone positioning, aid in the dosage of flow rate in high-flow nasal cannula, and guide the titration of positive-end expiratory pressure during invasive mechanical ventilation. The latter has been demonstrated to improve physiologic and mechanical parameters correlating with lung recruitment. Similarly, its use in detecting pneumothorax and harmful patient-ventilator interactions such as pendelluft has been proven effective. Nonetheless, its impact on clinically meaningful outcomes remains to be determined. CONCLUSIONS Electrical impedance tomography is a potential tool for the individualized management of ARDS throughout its different stages. Clinical trials should aim to determine whether a specific approach can improve clinical outcomes in ARDS management.
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21
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Laake JH, Småstuen MC, Møller MH, Larsson A, Aslam TN, Hofsø K, Pham T, Fan E, Bellani G, Laffey JG. Patient characteristics, management and outcomes in a Nordic subset of the "large observational study to understand the global impact of severe acute respiratory failure" (LUNG SAFE) study. Acta Anaesthesiol Scand 2022; 66:684-695. [PMID: 35398892 PMCID: PMC9322410 DOI: 10.1111/aas.14069] [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: 10/22/2021] [Revised: 02/07/2022] [Accepted: 03/28/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND The "Large observational study to understand the global impact of severe acute respiratory failure" (LUNG SAFE) study described the worldwide epidemiology and management of patients with acute hypoxaemic respiratory failure (AHRF). Here, we present the Nordic subset of data from the LUNG SAFE cohort. METHODS We extracted LUNG SAFE data for adults fulfilling criteria for AHRF in intensive care units (ICU) in Denmark, Norway and Sweden, including demographics, co-morbidities, clinical assessment and management characteristics, 90-day survival and length-of-stay (LOS). We analysed ICU LOS with linear regression, and associations between risk factors and mortality were quantified using Cox regression. RESULTS We included 192 patients, with a median age of 64 years (IQR 55, 72), and a male-to-female ratio of 2:1. The majority had one or more co-morbidities, and clinicians identified pneumonia as the primary cause of respiratory failure in 56% and acute respiratory distress syndrome (ARDS) in 21%. Median ICU LOS and duration of invasive mechanical ventilation (IMV) were 5 and 3 days. Tidal volumes (TV) were frequently larger than that supported by evidence and IMV allowing for spontaneous ventilation was common. Younger age, co-morbidity, surgical admission and ARDS were associated with ICU LOS. Sixty-one patients (32%) were dead at 90 days. Age and a non-surgical cause of admission were associated with death. CONCLUSIONS In this subset of LUNG SAFE, ARDS was often not recognised in patients with AHRF and management frequently deviated from evidence-based practices. ICU LOS was generally short, and mortality was attributable to known risk factors.
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Affiliation(s)
- Jon Henrik Laake
- Department of Anaesthesiology and Intensive Care Medicine, Division of Emergencies and Critical Care, Rikshospitalet Medical Centre Oslo University Hospital Oslo Norway
- Department of Research and Development, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
| | - Milada Cvancarova Småstuen
- Faculty of Health Sciences, Department of Nursing and Health Promotion Oslo Metropolitan University Oslo Norway
| | - Morten Hylander Møller
- Department of Intensive Care Rigshospitalet, University of Copenhagen Copenhagen Denmark
- Collaboration for Research in Intensive Care Copenhagen Denmark
| | - Anders Larsson
- Department of Surgical Sciences, Anaesthesiology and Intensive Care Uppsala University Hospital Uppsala Sweden
| | - Tayyba Naz Aslam
- Department of Anaesthesiology and Intensive Care Medicine, Division of Emergencies and Critical Care, Rikshospitalet Medical Centre Oslo University Hospital Oslo Norway
- Department of Research and Development, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
| | - Kristin Hofsø
- Department of Research and Development, Division of Emergencies and Critical Care Oslo University Hospital Oslo Norway
- Lovisenberg Diaconal University College Oslo Norway
| | - Tài Pham
- Service de médecine intensive‐réanimation, AP‐HP, Hôpital de Bicêtre Hôpitaux Universitaires Paris‐Saclay Le Kremlin‐Bicêtre France
- Université Paris‐Saclay, UVSQ, Univ. Paris‐Sud, Inserm U1018, Equipe d'Epidémiologie respiratoire intégrative, CESP Villejuif France
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine and the Institute of Health Policy, Management and Evaluation University of Toronto Toronto Canada
| | - Giacomo Bellani
- Department of Medicine and Surgery University of Milan‐Bicocca and Department of Emercengy, ASST Monza Monza Italy
| | - John G. Laffey
- School of Medicine, National University of Ireland Galway and Dept of Anaesthesia and Intensive Care Medicine Galway University Hospitals Galway Ireland
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22
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Müller‐Wirtz LM, Behne F, Kermad A, Wagenpfeil G, Schroeder M, Sessler DI, Volk T, Meiser A. Isoflurane promotes early spontaneous breathing in ventilated intensive care patients: A post hoc subgroup analysis of a randomized trial. Acta Anaesthesiol Scand 2022; 66:354-364. [PMID: 34870852 DOI: 10.1111/aas.14010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Spontaneous breathing is desirable in most ventilated patients. We therefore studied the influence of isoflurane versus propofol sedation on early spontaneous breathing in ventilated surgical intensive care patients and evaluated potential mediation by opioids and arterial carbon dioxide during the first 20 h of study sedation. METHODS We included a single-center subgroup of 66 patients, who participated in a large multi-center trial assessing efficacy and safety of isoflurane sedation, with 33 patients each randomized to isoflurane or propofol sedation. Both sedatives were titrated to a sedation depth of -4 to -1 on the Richmond Agitation Sedation Scale. The primary outcome was the fraction of time during which patients breathed spontaneously. RESULTS Baseline characteristics of isoflurane and propofol-sedated patients were well balanced. There were no substantive differences in management or treatment aside from sedation, and isoflurane and propofol provided nearly identical sedation depths. The mean fraction of time spent spontaneously breathing was 82% [95% CI: 69, 90] in patients sedated with isoflurane compared to 35% [95% CI: 22, 51] in those assigned to propofol: median difference: 61% [95% CI: 14, 89], p < .001. After adjustments for sufentanil dose and arterial carbon dioxide partial pressure, patients sedated with isoflurane were twice as likely to breathe spontaneously than those sedated with propofol: adjusted risk ratio: 2.2 [95%CI: 1.4, 3.3], p < .001. CONCLUSIONS Isoflurane compared to propofol sedation promotes early spontaneous breathing in deeply sedated ventilated intensive care patients. The benefit appears to be a direct effect isoflurane rather than being mediated by opioids or arterial carbon dioxide.
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Affiliation(s)
- Lukas M. Müller‐Wirtz
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
- Outcomes Research Consortium Cleveland Ohio USA
| | - Florian Behne
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
| | - Azzeddine Kermad
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry Epidemiology and Medical Informatics (IMBEI) Saarland University Faculty of Medicine Homburg Germany
| | - Matthias Schroeder
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
| | - Daniel I. Sessler
- Outcomes Research Consortium Cleveland Ohio USA
- Department of Outcomes Research Anesthesiology Institute Cleveland Clinic Cleveland Ohio USA
| | - Thomas Volk
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
- Outcomes Research Consortium Cleveland Ohio USA
| | - Andreas Meiser
- Department of Anaesthesiology Intensive Care and Pain Therapy Saarland University Medical Center Saarland University Faculty of Medicine Homburg Germany
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23
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Ang CYS, Chiew YS, Vu LH, Cove ME. Quantification of respiratory effort magnitude in spontaneous breathing patients using Convolutional Autoencoders. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2022; 215:106601. [PMID: 34973606 DOI: 10.1016/j.cmpb.2021.106601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/14/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Spontaneous breathing (SB) effort during mechanical ventilation (MV) is an important metric of respiratory drive. However, SB effort varies due to a variety of factors, including evolving pathology and sedation levels. Therefore, assessment of SB efforts needs to be continuous and non-invasive. This is important to prevent both over- and under-assistance with MV. In this study, a machine learning model, Convolutional Autoencoder (CAE) is developed to quantify the magnitude of SB effort using only bedside MV airway pressure and flow waveform. METHOD The CAE model was trained using 12,170,655 simulated SB flow and normal flow data (NB). The paired SB and NB flow data were simulated using a Gaussian Effort Model (GEM) with 5 basis functions. When the CAE model is given a SB flow input, it is capable of predicting a corresponding NB flow for the SB flow input. The magnitude of SB effort (SBEMag) is then quantified as the difference between the SB and NB flows. The CAE model was used to evaluate the SBEMag of 9 pressure control/ support datasets. Results were validated using a mean squared error (MSE) fitting between clinical and training SB flows. RESULTS The CAE model was able to produce NB flows from the clinical SB flows with the median SBEMag of the 9 datasets being 25.39% [IQR: 21.87-25.57%]. The absolute error in SBEMag using MSE validation yields a median of 4.77% [IQR: 3.77-8.56%] amongst the cohort. This shows the ability of the GEM to capture the intrinsic details present in SB flow waveforms. Analysis also shows both intra-patient and inter-patient variability in SBEMag. CONCLUSION A Convolutional Autoencoder model was developed with simulated SB and NB flow data and is capable of quantifying the magnitude of patient spontaneous breathing effort. This provides potential application for real-time monitoring of patient respiratory drive for better management of patient-ventilator interaction.
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Affiliation(s)
| | - Yeong Shiong Chiew
- School of Engineering, Monash University Malaysia, Bandar Sunway, Malaysia.
| | - Lien Hong Vu
- Division of Respiratory and Critical Care Medicine, Department of Medicine, National University Health System, Singapore
| | - Matthew E Cove
- Division of Respiratory and Critical Care Medicine, Department of Medicine, National University Health System, Singapore
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24
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Leszek A, Wozniak H, Giudicelli-Bailly A, Suh N, Boroli F, Pugin J, Grosgurin O, Marti C, Le Terrier C, Quintard H. Early Measurement of ROX Index in Intermediary Care Unit Is Associated with Mortality in Intubated COVID-19 Patients: A Retrospective Study. J Clin Med 2022; 11:jcm11020365. [PMID: 35054058 PMCID: PMC8779507 DOI: 10.3390/jcm11020365] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/05/2022] [Accepted: 01/10/2022] [Indexed: 12/10/2022] Open
Abstract
COVID-19 patients often present with rapidly progressing acute hypoxemic respiratory failure, requiring orotracheal intubation with different prognostic issues. However, ICU specialists lack predictive tools to stratify these patients. We conducted a single-center cross-sectional retrospective study to evaluate if the ROX index, measured under non-invasive oxygenation support, can predict ICU mortality in a COVID-19 intubated patient cohort. This study took place in the division of intensive care at the Geneva University Hospitals (Geneva, Switzerland). We included all consecutive adult patients treated by non-invasive oxygenation support and requiring intubation for acute respiratory failure due to COVID-19 between 9 September 2020 and 30 March 2021, corresponding to the second local surge of COVID-19 cases. Baseline demographic data, comorbidities, median ROX between H0 and H8, and clinical outcomes were collected. Overall, 82 patients were intubated after failing a non-invasive oxygenation procedure. Women represented 25.6% of the whole cohort. Median age and median BMI were 70 (60–75) years and 28 (25–33), respectively. Before intubation, the median ROX between H0 and H8 was 6.3 (5.0–8.2). In a multivariate analysis, the median ROX H0–H8 was associated with ICU mortality as a protective factor with an odds ratio (95% CI) = 0.77 (0.60–0.99); p < 0.05. In intubated COVID-19 patients treated initially by non-invasive oxygenation support for acute respiratory failure, the median ROX H0–H8 could be an interesting predictive factor associated with ICU mortality.
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Affiliation(s)
- Alexandre Leszek
- Department of Medicine, Division of General Internal Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (A.L.); (O.G.); (C.M.)
| | - Hannah Wozniak
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Amélie Giudicelli-Bailly
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Noémie Suh
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Filippo Boroli
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Jérôme Pugin
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Olivier Grosgurin
- Department of Medicine, Division of General Internal Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (A.L.); (O.G.); (C.M.)
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Christophe Marti
- Department of Medicine, Division of General Internal Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (A.L.); (O.G.); (C.M.)
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Christophe Le Terrier
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
| | - Hervé Quintard
- Department of Acute Medicine, Intensive Care Unit, Geneva University Hospitals, 1205 Geneva, Switzerland; (H.W.); (A.G.-B.); (N.S.); (F.B.); (J.P.); (C.L.T.)
- Correspondence:
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25
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McNamee JJ, Brodie D, McAuley DF. Extracorporeal Carbon Dioxide Removal vs Standard Care Ventilation Effect on 90-Day Mortality in Patients With Acute Hypoxemic Respiratory Failure-Reply. JAMA 2022; 327:84-85. [PMID: 34982122 DOI: 10.1001/jama.2021.21005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- James J McNamee
- Regional Intensive Care Unit, Royal Victoria Hospital, Belfast, Northern Ireland
| | - Daniel Brodie
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York
| | - Daniel F McAuley
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, Northern Ireland
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26
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The physiological underpinnings of life-saving respiratory support. Intensive Care Med 2022; 48:1274-1286. [PMID: 35690953 PMCID: PMC9188674 DOI: 10.1007/s00134-022-06749-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/16/2022] [Indexed: 02/04/2023]
Abstract
Treatment of respiratory failure has improved dramatically since the polio epidemic in the 1950s with the use of invasive techniques for respiratory support: mechanical ventilation and extracorporeal respiratory support. However, respiratory support is only a supportive therapy, designed to "buy time" while the disease causing respiratory failure abates. It ensures viable gas exchange and prevents cardiorespiratory collapse in the context of excessive loads. Because the use of invasive modalities of respiratory support is also associated with substantial harm, it remains the responsibility of the clinician to minimize such hazards. Direct iatrogenic consequences of mechanical ventilation include the risk to the lung (ventilator-induced lung injury) and the diaphragm (ventilator-induced diaphragm dysfunction and other forms of myotrauma). Adverse consequences on hemodynamics can also be significant. Indirect consequences (e.g., immobilization, sleep disruption) can have devastating long-term effects. Increasing awareness and understanding of these mechanisms of injury has led to a change in the philosophy of care with a shift from aiming to normalize gases toward minimizing harm. Lung (and more recently also diaphragm) protective ventilation strategies include the use of extracorporeal respiratory support when the risk of ventilation becomes excessive. This review provides an overview of the historical background of respiratory support, pathophysiology of respiratory failure and rationale for respiratory support, iatrogenic consequences from mechanical ventilation, specifics of the implementation of mechanical ventilation, and role of extracorporeal respiratory support. It highlights the need for appropriate monitoring to estimate risks and to individualize ventilation and sedation to provide safe respiratory support to each patient.
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27
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Ziaka M, Exadaktylos A. Brain-lung interactions and mechanical ventilation in patients with isolated brain injury. Crit Care 2021; 25:358. [PMID: 34645485 PMCID: PMC8512596 DOI: 10.1186/s13054-021-03778-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/30/2021] [Indexed: 11/29/2022] Open
Abstract
During the last decade, experimental and clinical studies have demonstrated that isolated acute brain injury (ABI) may cause severe dysfunction of peripheral extracranial organs and systems. Of all potential target organs and systems, the lung appears to be the most vulnerable to damage after brain injury (BI). The pathophysiology of these brain–lung interactions are complex and involve neurogenic pulmonary oedema, inflammation, neurodegeneration, neurotransmitters, immune suppression and dysfunction of the autonomic system. The systemic effects of inflammatory mediators in patients with BI create a systemic inflammatory environment that makes extracranial organs vulnerable to secondary procedures that enhance inflammation, such as mechanical ventilation (MV), surgery and infections. Indeed, previous studies have shown that in the presence of a systemic inflammatory environment, specific neurointensive care interventions—such as MV—may significantly contribute to the development of lung injury, regardless of the underlying mechanisms. Although current knowledge supports protective ventilation in patients with BI, it must be born in mind that ABI-related lung injury has distinct mechanisms that involve complex interactions between the brain and lungs. In this context, the role of extracerebral pathophysiology, especially in the lungs, has often been overlooked, as most physicians focus on intracranial injury and cerebral dysfunction. The present review aims to fill this gap by describing the pathophysiology of complications due to lung injuries in patients with a single ABI, and discusses the possible impact of MV in neurocritical care patients with normal lungs.
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Affiliation(s)
- Mairi Ziaka
- Department of Internal Medicine, Thun General Hospital, Thun, Switzerland.
| | - Aristomenis Exadaktylos
- Department of Emergency Medicine, Inselspital, University Hospital, University of Bern, Bern, Switzerland
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Abstract
Acute respiratory distress syndrome (ARDS) is one of the most common severe diseases seen in the clinical setting. With the continuous exploration of ARDS in recent decades, the understanding of ARDS has improved. ARDS is not a simple lung disease but a clinical syndrome with various etiologies and pathophysiological changes. However, in the intensive care unit, ARDS often occurs a few days after primary lung injury or after a few days of treatment for other severe extrapulmonary diseases. Under such conditions, ARDS often progresses rapidly to severe ARDS and is difficult to treat. The occurrence and development of ARDS in these circumstances are thus not related to primary lung injury; the real cause of ARDS may be the “second hit” caused by inappropriate treatment. In view of the limited effective treatments for ARDS, the strategic focus has shifted to identifying potential or high-risk ARDS patients during the early stages of the disease and implementing treatment strategies aimed at reducing ARDS and related organ failure. Future research should focus on the prevention of ARDS.
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Thompson AF, Moraes L, Rocha NN, Fernandes MVS, Antunes MA, Abreu SC, Santos CL, Capelozzi VL, Samary CS, de Abreu MG, Saddy F, Pelosi P, Silva PL, Rocco PRM. Impact of different frequencies of controlled breath and pressure-support levels during biphasic positive airway pressure ventilation on the lung and diaphragm in experimental mild acute respiratory distress syndrome. PLoS One 2021; 16:e0256021. [PMID: 34415935 PMCID: PMC8378704 DOI: 10.1371/journal.pone.0256021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 07/28/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND We hypothesized that a decrease in frequency of controlled breaths during biphasic positive airway pressure (BIVENT), associated with an increase in spontaneous breaths, whether pressure support (PSV)-assisted or not, would mitigate lung and diaphragm damage in mild experimental acute respiratory distress syndrome (ARDS). MATERIALS AND METHODS Wistar rats received Escherichia coli lipopolysaccharide intratracheally. After 24 hours, animals were randomly assigned to: 1) BIVENT-100+PSV0%: airway pressure (Phigh) adjusted to VT = 6 mL/kg and frequency of controlled breaths (f) = 100 bpm; 2) BIVENT-50+PSV0%: Phigh adjusted to VT = 6 mL/kg and f = 50 bpm; 3) BIVENT-50+PSV50% (PSV set to half the Phigh reference value, i.e., PSV50%); or 4) BIVENT-50+PSV100% (PSV equal to Phigh reference value, i.e., PSV100%). Positive end-expiratory pressure (Plow) was equal to 5 cmH2O. Nonventilated animals were used for lung and diaphragm histology and molecular biology analysis. RESULTS BIVENT-50+PSV0%, compared to BIVENT-100+PSV0%, reduced the diffuse alveolar damage (DAD) score, the expression of amphiregulin (marker of alveolar stretch) and muscle atrophy F-box (marker of diaphragm atrophy). In BIVENT-50 groups, the increase in PSV (BIVENT-50+PSV50% versus BIVENT-50+PSV100%) yielded better lung mechanics and less alveolar collapse, interstitial edema, cumulative DAD score, as well as gene expressions associated with lung inflammation, epithelial and endothelial cell damage in lung tissue, and muscle ring finger protein 1 (marker of muscle proteolysis) in diaphragm. Transpulmonary peak pressure (Ppeak,L) and pressure-time product per minute (PTPmin) at Phigh were associated with lung damage, while increased spontaneous breathing at Plow did not promote lung injury. CONCLUSION In the ARDS model used herein, during BIVENT, the level of PSV and the phase of the respiratory cycle in which the inspiratory effort occurs affected lung and diaphragm damage. Partitioning of inspiratory effort and transpulmonary pressure in spontaneous breaths at Plow and Phigh is required to minimize VILI.
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Affiliation(s)
- Alessandra F. Thompson
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Copa D’Or Hospital, Rio de Janeiro, Brazil
| | - Lillian Moraes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Nazareth N. Rocha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Marcos V. S. Fernandes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Mariana A. Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Soraia C. Abreu
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Cintia L. Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Vera L. Capelozzi
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Cynthia S. Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Department of Physical Therapy, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcelo G. de Abreu
- Department of Anesthesiology and Intensive Care Therapy, Pulmonary Engineering Group, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
- Outcomes Research Consortium, Cleveland, OH, United States of America
| | - Felipe Saddy
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Copa D’Or Hospital, Rio de Janeiro, Brazil
- Pró-Cardíaco Hospital, Rio de Janeiro, Brazil
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
- San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Pedro L. Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Patricia R. M. Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- * E-mail:
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Tisminetzky M, Dianti J, Ferreyro BL, Angriman F, Del Sorbo L, Sud S, Talmor D, Fan E, Ferguson ND, Serpa Neto A, Adhikari NKJ, Goligher EC. Association of different positive end-expiratory pressure selection strategies with all-cause mortality in adult patients with acute respiratory distress syndrome. Syst Rev 2021; 10:225. [PMID: 34384488 PMCID: PMC8357961 DOI: 10.1186/s13643-021-01766-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 07/20/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The acute respiratory distress syndrome (ARDS) has high morbidity and mortality. Positive end-expiratory pressure (PEEP) is commonly used in patients with ARDS but the best method to select the optimal PEEP level and reduce all-cause mortality is unclear. The primary objective of this network meta-analysis is to summarize the available evidence and to compare the effect of different PEEP selection strategies on all-cause mortality in adult patients with ARDS. METHODS We will search MEDLINE, Cochrane Central Register of Controlled Trials, PubMed, EMBASE, and LILACS from inception onwards for randomized controlled trials assessing the effect of PEEP selection strategies in adult patients with moderate to severe ARDS. We will exclude studies that did not use a lung-protective ventilation approach as part of the comparator or intervention strategy. The primary outcome will be all-cause mortality (at the longest available follow-up and up to 90 days). Secondary outcomes will include barotrauma, ventilator-free days, intensive care unit and hospital length of stay, and changes in oxygenation. Two reviewers will independently screen all citations, full-text articles, and extract study-data. We will assess the risk of bias for each of the outcomes using version 2 of the Cochrane risk of bias tool for randomized controlled trials. If feasible, Bayesian network meta-analyses will be conducted to obtain pooled estimates of all potential head-to-head comparisons. We will report pairwise and network meta-analysis treatment effect estimates as risk ratios and risk differences, together with the associated 95% credible intervals. We will assess certainty in effect estimates using GRADE methodology. DISCUSSION The present study will inform clinical decision-making for adult patients with ARDS and will improve our understanding of the limitations of the available literature assessing PEEP selection strategies. Finally, this information may also inform the design of future randomized trials, including the selection of interventions, comparators, and predictive enrichment strategies. TRIAL REGISTRATION PROSPERO 2020 CRD42020193302 .
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Affiliation(s)
- Manuel Tisminetzky
- University Health Network/Sinai Health System, University of Toronto, Toronto, Canada.,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Jose Dianti
- University Health Network/Sinai Health System, University of Toronto, Toronto, Canada.,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Bruno L Ferreyro
- University Health Network/Sinai Health System, University of Toronto, Toronto, Canada.,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Federico Angriman
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.,Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Lorenzo Del Sorbo
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Institute of Medical Science, University of Toronto, Toronto, Canada.,Division of Respirology and Critical Care Medicine, Toronto General Hospital, 585 University Ave. 11-PMB, Room 192, Toronto, ON, M5G 2N2, Canada
| | - Sachin Sud
- Institute for Better Health and Critical Care, Department of Medicine, Trillium Health Partners, Mississauga, Canada
| | - Daniel Talmor
- Department of Anesthesia, Pain, Medicine and Critical Care, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Division of Respirology and Critical Care Medicine, Toronto General Hospital, 585 University Ave. 11-PMB, Room 192, Toronto, ON, M5G 2N2, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.,Division of Respirology and Critical Care Medicine, Toronto General Hospital, 585 University Ave. 11-PMB, Room 192, Toronto, ON, M5G 2N2, Canada
| | | | - Neill K J Adhikari
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.,Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Ewan C Goligher
- University Health Network/Sinai Health System, University of Toronto, Toronto, Canada. .,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada. .,Division of Respirology and Critical Care Medicine, Toronto General Hospital, 585 University Ave. 11-PMB, Room 192, Toronto, ON, M5G 2N2, Canada. .,Toronto General Hospital Research Institute, Toronto, ON, Canada.
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Hamzaoui O, Shi R, Carelli S, Sztrymf B, Prat D, Jacobs F, Monnet X, Gouëzel C, Teboul JL. Changes in pulse pressure variation to assess preload responsiveness in mechanically ventilated patients with spontaneous breathing activity: an observational study. Br J Anaesth 2021; 127:532-538. [PMID: 34246460 DOI: 10.1016/j.bja.2021.05.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/03/2021] [Accepted: 05/28/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Pulse pressure variation (PPV) is not reliable in predicting preload responsiveness in patients receiving mechanical with spontaneous breathing (SB) activity. We hypothesised that an increase in PPV after a tidal volume (VT) challenge (TVC) or a decrease in PPV during passive leg raising (PLR) can predict preload responsiveness in such cases. METHODS This prospective observational study was performed in two ICUs and included patients receiving mechanical ventilation with SB, for whom the treating physician decided to test preload responsiveness. Transthoracic echocardiography was used to measure the velocity-time integral (VTI) of the left ventricular outflow tract. Patients exhibiting an increase in VTI ≥12% during PLR were defined as PLR+ patients (or preload responders). Then, a TVC was performed by increasing VT by 2 ml kg-1 predicted body weight (PBW) for 1 min. PPV was recorded at each step. RESULTS Fifty-four patients (Simplified Acute Physiology Score II: 60 (25) ventilated with a VT of 6.5 (0.8) ml kg-1 PBW, were included. Twenty-two patients were PLR+. The absolute decrease in PPV during PLR and the absolute increase in PPV during TVC discriminated between PLR+ and PLR- patients with area under the receiver operating characteristic (AUROC) curve of 0.78 and 0.73, respectively, and cut-off values of -1% and +2%, respectively. Those AUROC curve values were similar but were significantly different from that of baseline PPV (0.61). CONCLUSION In patients undergoing mechanical ventilation with SB activity, PPV does not predict preload responsiveness. However, the decrease in PPV during PLR and the increase in PPV during a TVC help discriminate preload responders from non-responders with moderate accuracy. CLINICAL TRIAL REGISTRATION NCT04369027 (ClinicalTrials.gov).
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Affiliation(s)
- Olfa Hamzaoui
- Service de réanimation Polyvalente, Hôpital Antoine Béclère, AP-HP Université Paris-Saclay, Clamart, France.
| | - Rui Shi
- Université Paris-Saclay, AP-HP, Service de Médecine Intensive-réanimation, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Le Kremlin-Bicêtre, France; INSERM-UMR_S999 LabEx - LERMIT, Hôpital Marie-Lannelongue, Le Plessis Robinson, France
| | - Simone Carelli
- Université Paris-Saclay, AP-HP, Service de Médecine Intensive-réanimation, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Le Kremlin-Bicêtre, France
| | - Benjamin Sztrymf
- Service de réanimation Polyvalente, Hôpital Antoine Béclère, AP-HP Université Paris-Saclay, Clamart, France; INSERM-UMR_S999 LabEx - LERMIT, Hôpital Marie-Lannelongue, Le Plessis Robinson, France
| | - Dominique Prat
- Service de réanimation Polyvalente, Hôpital Antoine Béclère, AP-HP Université Paris-Saclay, Clamart, France
| | - Frederic Jacobs
- Service de réanimation Polyvalente, Hôpital Antoine Béclère, AP-HP Université Paris-Saclay, Clamart, France
| | - Xavier Monnet
- Université Paris-Saclay, AP-HP, Service de Médecine Intensive-réanimation, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Le Kremlin-Bicêtre, France; INSERM-UMR_S999 LabEx - LERMIT, Hôpital Marie-Lannelongue, Le Plessis Robinson, France
| | - Corentin Gouëzel
- Service de réanimation Polyvalente, Hôpital Antoine Béclère, AP-HP Université Paris-Saclay, Clamart, France
| | - Jean-Louis Teboul
- Université Paris-Saclay, AP-HP, Service de Médecine Intensive-réanimation, Hôpital de Bicêtre, DMU CORREVE, FHU SEPSIS, Le Kremlin-Bicêtre, France; INSERM-UMR_S999 LabEx - LERMIT, Hôpital Marie-Lannelongue, Le Plessis Robinson, France
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Pérez J, Dorado JH, Navarro E, Accoce M. Self-inflicted lung injury: is it possible to identify the risk? A case report. Rev Bras Ter Intensiva 2021; 33:461-468. [PMID: 35107559 PMCID: PMC8555405 DOI: 10.5935/0103-507x.20210061] [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: 02/28/2020] [Accepted: 09/12/2020] [Indexed: 11/20/2022] Open
Abstract
A respiração espontânea pode ser prejudicial para pacientes
com pulmões previamente lesados, especialmente na vigência de
síndrome do desconforto respiratório agudo. Mais ainda, a
incapacidade de assumir a respiração totalmente espontânea
durante a ventilação mecânica e a necessidade de voltar
à ventilação mecânica controlada se associam com
mortalidade mais alta. Existe uma lacuna no conhecimento em
relação aos parâmetros que poderiam ser úteis para
predizer o risco de lesão pulmonar autoinflingida pelo paciente e
detecção da incapacidade de assumir a respiração
espontânea. Relata-se o caso de um paciente com lesão pulmonar
autoinflingida e as correspondentes variáveis, básicas e
avançadas, de monitoramento da mecânica do sistema
respiratório, além dos resultados fisiológicos e
clínicos relacionados à respiração espontânea
durante ventilação mecânica. O paciente era um homem
caucasiano com 33 anos de idade e história clínica de AIDS, que
apresentou síndrome do desconforto respiratório agudo e necessitou
ser submetido à ventilação mecânica invasiva
após falha do suporte ventilatório não invasivo. Durante os
períodos de ventilação controlada, adotou-se
estratégia de ventilação protetora, e o paciente mostrou
evidente melhora, tanto do ponto de vista clínico quanto
radiográfico. Contudo, durante cada período de
respiração espontânea sob ventilação com
pressão de suporte, apesar dos parâmetros iniciais adequados, das
regulagens rigorosamente estabelecidas e do estrito monitoramento, o paciente
desenvolveu hipoxemia progressiva e piora da mecânica do sistema
respiratório, com deterioração radiográfica
claramente correlacionada (lesão pulmonar autoinflingida pelo paciente).
Após falha de três tentativas de respiração
espontânea, o paciente faleceu por hipoxemia refratária no 29°
dia. Neste caso, as variáveis básicas e avançadas
convencionais não foram suficientes para identificar a aptidão
para respirar espontaneamente ou predizer o risco de desenvolver lesão
pulmonar autoinflingida pelo paciente durante a ventilação de
suporte parcial.
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Affiliation(s)
- Joaquín Pérez
- Sanatorio Anchorena de San Martín - Buenos Aires, Argentina.,Hospital General de Agudos "Carlos G. Durand" - Buenos Aires, Argentina
| | | | - Emiliano Navarro
- Hospital General de Agudos "Carlos G. Durand" - Buenos Aires, Argentina.,Centro del Parque - Buenos Aires, Argentina
| | - Matías Accoce
- Sanatorio Anchorena de San Martín - Buenos Aires, Argentina.,Hospital de Quemados "Dr. Arturo Umberto Illia"- Buenos Aires, Argentina.,Universidad Abierta Interamericana - Buenos Aires, Argentina
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Detection of the Harmful Effects of Spontaneous Breathing: Better Physiological Phenotyping May Hold Promise. Crit Care Med 2021; 48:e431-e432. [PMID: 32301784 DOI: 10.1097/ccm.0000000000004249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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The authors reply. Crit Care Med 2021; 48:e432-e433. [PMID: 32301785 DOI: 10.1097/ccm.0000000000004302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wiart A, Castanares-Zapatero D, Wittebole X, Maerckx G, David G, Laterre PF, Gerard L. Prone Positioning in Spontaneously Breathing Subjects With Moderate or Severe ARDS During Invasive Ventilation. Respir Care 2021; 66:724-732. [PMID: 33653912 PMCID: PMC9994119 DOI: 10.4187/respcare.08461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Prone positioning (PP) during invasive mechanical ventilation improves outcomes of patients with severe ARDS. Recent studies suggest that PP in spontaneously breathing, nonintubated patients with acute respiratory failure is well tolerated and improves oxygenation. However, little is known regarding patient triggered ventilation in intubated patients with ARDS undergoing PP. We conducted a retrospective review of our experience with placing patients in the prone position in 2 cohorts of subjects with moderate and severe ARDS (ie, one cohort with ARDS related to COVID-19, the other with ARDS unrelated to COVID-19), many of whom were receiving pressure support ventilation (PSV). METHODS We conducted a retrospective analysis in a single 22-bed mixed ICU. The subjects included in the analysis were ≥ 18 y old, met the Berlin definition for moderate or severe ARDS (whether related COVID-19 or not), and underwent PP during invasive ventilation. RESULTS 39 subjects were included in the analysis: 20 subjects had ARDS related to COVID-19, while 19 had ARDS related to other etiologies. A total of 113 PP episodes were analyzed: 84 during PSV and 29 during volume control continuous mandatory ventilation. PP during PSV was well tolerated and was effective in improving arterial oxygenation (ie, an increase of median [Formula: see text] from 100 mm Hg [interquartile range 75-120] before PP to 135 mm Hg [interquartile range 111-161] at the end of the PP session, P < .0001). No significant difference between continuous mandatory ventilation and PSV was noted regarding arterial oxygenation during PP. Compared with continuous mandatory ventilation mode, PP during PSV was associated with a significant decrease in the use of neuromuscular blocking agents (4% vs 69% of subjects, P < .001), while sedative requirements remained unchanged. CONCLUSIONS In a retrospective analysis of consecutive intubated subjects with moderate or severe ARDS, related or not to COVID-19, spontaneous breathing during PP was well tolerated and achieved significant improvement in arterial oxygenation.
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Affiliation(s)
- Adil Wiart
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
| | - Diego Castanares-Zapatero
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
- Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium
| | - Xavier Wittebole
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
| | - Guillaume Maerckx
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
| | - Guillaume David
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
| | - Pierre-François Laterre
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
- Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium
| | - Ludovic Gerard
- Department of Critical Care Medicine, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.
- Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium
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Reis AMD, Midega TD, Deliberato RO, Johnson AE, Bulgarelli L, Correa TD, Celi LA, Pelosi P, Gama De Abreu M, Schultz MJ, Serpa Neto A. Effect of spontaneous breathing on ventilator-free days in critically ill patients-an analysis of patients in a large observational cohort. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:783. [PMID: 34268396 PMCID: PMC8246163 DOI: 10.21037/atm-20-7901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/22/2021] [Indexed: 11/06/2022]
Abstract
Background Mechanical ventilation can injure lung tissue and respiratory muscles. The aim of the present study is to assess the effect of the amount of spontaneous breathing during mechanical ventilation on patient outcomes. Methods This is an analysis of the database of the ‘Medical Information Mart for Intensive Care (MIMIC)’-III, considering intensive care units (ICUs) of the Beth Israel Deaconess Medical Center (BIDMC), Boston, MA. Adult patients who received invasive ventilation for at least 48 hours were included. Patients were categorized according to the amount of spontaneous breathing, i.e., ≥50% (‘high spontaneous breathing’) and <50% (‘low spontaneous breathing’) of time during first 48 hours of ventilation. The primary outcome was the number of ventilator-free days. Results In total, the analysis included 3,380 patients; 70.2% were classified as ‘high spontaneous breathing’, and 29.8% as ‘low spontaneous breathing’. Patients in the ‘high spontaneous breathing’ group were older, had more comorbidities, and lower severity scores. In adjusted analysis, the amount of spontaneous breathing was not associated with the number of ventilator-free days [20.0 (0.0–24.2) vs. 19.0 (0.0–23.7) in high vs. low; absolute difference, 0.54 (95% CI, –0.10 to 1.19); P=0.101]. However, ‘high spontaneous breathing' was associated with shorter duration of ventilation in survivors [6.5 (3.6 to 12.2) vs. 7.6 (4.1 to 13.9); absolute difference, –0.91 (95% CI, −1.80 to −0.02); P=0.046]. Conclusions In patients surviving and receiving ventilation for at least 48 hours, the amount of spontaneous breathing during this period was not associated with an increased number of ventilator-free days.
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Affiliation(s)
- Aline Mela Dos Reis
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Thais Dias Midega
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Rodrigo Octavio Deliberato
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil.,Big Data Analytics Group, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Alistair Ew Johnson
- Laboratory for Computational Physiology, Institute for Medical Engineering & Science, MIT, Cambridge, MA, USA
| | - Lucas Bulgarelli
- Big Data Analytics Group, Hospital Israelita Albert Einstein, São Paulo, Brazil.,Laboratory for Computational Physiology, Institute for Medical Engineering & Science, MIT, Cambridge, MA, USA
| | - Thiago Domingos Correa
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Leo Anthony Celi
- Laboratory for Computational Physiology, Institute for Medical Engineering & Science, MIT, Cambridge, MA, USA.,Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Paolo Pelosi
- IRCCS San Martino Policlinico Hospital, Genoa, Italy.,Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Marcelo Gama De Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Technical University Dresden, Dresden, Germany
| | - Marcus J Schultz
- Department of Intensive Care & 'Laboratory of Experimental Intensive Care and Anesthesiology' (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands.,Mahidol-Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Ary Serpa Neto
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil.,Department of Intensive Care & 'Laboratory of Experimental Intensive Care and Anesthesiology' (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands.,Australian and New Zealand Intensive Care Research Centre, Monash University, Melbourne, Australia.,Data Analytics Research & Evaluation (DARE) Centre, Austin Hospital and University of Melbourne, Melbourne, Australia
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The effects of sedatives, neuromuscular blocking agents and opioids on ventilator-associated events. Eur J Anaesthesiol 2021; 37:67-69. [PMID: 31913933 DOI: 10.1097/eja.0000000000001132] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Urner M, Mitsakakis N, Vorona S, Chen L, Sklar MC, Dres M, Rubenfeld GD, Brochard LJ, Ferguson ND, Fan E, Goligher EC. Identifying Subjects at Risk for Diaphragm Atrophy During Mechanical Ventilation Using Routinely Available Clinical Data. Respir Care 2021; 66:551-558. [PMID: 33293364 PMCID: PMC9993979 DOI: 10.4187/respcare.08223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Diaphragmatic respiratory effort during mechanical ventilation is an important determinant of patient outcome, but direct measurement of diaphragmatic contractility requires specialized instrumentation and technical expertise. We sought to determine whether routinely collected clinical variables can predict diaphragmatic contractility and stratify the risk of diaphragm atrophy. METHODS We conducted a secondary analysis of a prospective cohort study on diaphragm ultrasound in mechanically ventilated subjects. Clinical variables, such as breathing frequency, ventilator settings, and blood gases, were recorded longitudinally. Machine learning techniques were used to identify variables predicting diaphragm contractility and stratifying the risk of diaphragm atrophy (> 10% decrease in thickness from baseline). Performance of the variables was evaluated in mixed-effects logistic regression and random-effects tree models using the area under the receiver operating characteristic curve. RESULTS Measurements were available for 761 study days in 191 subjects, of whom 73 (38%) developed diaphragm atrophy. No routinely collected clinical variable, alone or in combination, could accurately predict either diaphragm contractility or the development of diaphragm atrophy (model area under the receiver operating characteristic curve 0.63-0.75). The risk of diaphragm atrophy was not significantly different according to the presence or absence of patient-triggered breaths (38.3% vs 38.6%; odds ratio 1.01, 95% CI 0.05-2.03). Diaphragm thickening fraction < 15% during either of the first 2 d of the study was associated with a higher risk of atrophy (44.6% vs 26.1%; odds ratio 2.28, 95% CI 1.05-4.95). CONCLUSIONS Diaphragmatic contractility and the risk of diaphragm atrophy could not be reliably determined from routinely collected clinical variables and ventilator settings. A single measurement of diaphragm thickening fraction measured within 48 h of initiating mechanical ventilation can be used to stratify the risk of diaphragm atrophy during mechanical ventilation.
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Affiliation(s)
- Martin Urner
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Nicholas Mitsakakis
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Stefannie Vorona
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
| | - Lu Chen
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Michael C Sklar
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Martin Dres
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Gordon D Rubenfeld
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
- Program in Trauma, Emergency, and Critical Care Organization, Sunnybrook Health Sciences Center, Toronto, Ontario, Canada
| | - Laurent J Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
- Departments of Medicine and Physiology, University of Toronto, Toronto, Canada
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
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Abstract
PURPOSE OF REVIEW The aim of this study was to review the most recent literature on mechanical ventilation strategies in patients with septic shock. RECENT FINDINGS Indirect clinical trial evidence has refined the use of neuromuscular blocking agents, positive end-expiratory pressure (PEEP) and recruitment manoeuvres in septic shock patients with acute respiratory distress syndrome. Weaning strategies and devices have also been recently evaluated. The role of lung protective ventilation in patients with healthy lungs, while recognized, still needs to be further refined. The possible detrimental effects of spontaneous breathing in patients who develop acute respiratory distress syndrome is increasingly recognized, but clinical trial evidence is still lacking to confirm this hypothesis. A new concept of lung and diaphragm protective is emerging in the critical care literature, but its application will need a complex intervention implementation approach to allow adequate scrutiny of this concept and uptake by clinicians. SUMMARY Many advances in the management of the mechanically ventilated patient with sepsis and septic shock have occurred in recent years, but clinical trial evidence is still necessary to translate new hypotheses to the bedside and find the right balance between benefits and risks of these new strategies.
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Spontaneous Versus Controlled Mechanical Ventilation in Patients with Acute Respiratory Distress Syndrome. CURRENT ANESTHESIOLOGY REPORTS 2021; 11:85-91. [PMID: 33679255 PMCID: PMC7925253 DOI: 10.1007/s40140-021-00443-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2021] [Indexed: 01/06/2023]
Abstract
Purpose of Review To review clinical evidence on whether or not to allow mechanically ventilated patients with acute respiratory distress syndrome (ARDS) to breathe spontaneously. Recent Findings Observational data (LUNG SAFE study) indicate that mechanical ventilation allowing for spontaneous breathing (SB) is associated with more ventilator-free days and a shorter stay in the intensive care unit without any effect on hospital mortality. A paediatric trial, comparing airway pressure release ventilation (APRV) and low-tidal volume ventilation, showed an increase in mortality in the APRV group. Conversely, in an unpublished trial comparing SB and controlled ventilation (NCT01862016), the authors concluded that SB is feasible but did not improve outcomes in ARDS patients. Summary A paucity of clinical trial data continues to prevent firm guidance on if or when to allow SB during mechanical ventilation in patients with ARDS. No published large randomised controlled trial exists to inform practice about the benefits and harms of either mode.
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da Cruz DG, de Magalhães RF, Padilha GA, da Silva MC, Braga CL, Silva AR, Gonçalves de Albuquerque CF, Capelozzi VL, Samary CS, Pelosi P, Rocco PRM, Silva PL. Impact of positive biphasic pressure during low and high inspiratory efforts in Pseudomonas aeruginosa-induced pneumonia. PLoS One 2021; 16:e0246891. [PMID: 33577592 PMCID: PMC7880436 DOI: 10.1371/journal.pone.0246891] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 01/28/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND During pneumonia, normal alveolar areas coexist adjacently with consolidated areas, and high inspiratory efforts may predispose to lung damage. To date, no study has evaluated different degrees of effort during Biphasic positive airway pressure (BIVENT) on lung and diaphragm damage in experimental pneumonia, though largely used in clinical setting. We aimed to evaluate lung damage, genes associated with ventilator-induced lung injury (VILI) and diaphragmatic injury, and blood bacteria in pressure-support ventilation (PSV), BIVENT with low and high inspiratory efforts in experimental pneumonia. MATERIAL AND METHODS Twenty-eight male Wistar rats (mean ± SD weight, 333±78g) were submitted Pseudomonas aeruginosa-induced pneumonia. After 24-h, animals were ventilated for 1h in: 1) PSV; 2) BIVENT with low (BIVENTLow-Effort); and 3) BIVENT with high inspiratory effort (BIVENTHigh-Effort). BIVENT was set at Phigh to achieve VT = 6 ml/kg and Plow at 5 cmH2O (n = 7/group). High- and low-effort conditions were obtained through anaesthetic infusion modulation based on neuromuscular drive (P0.1). Lung mechanics, histological damage score, blood bacteria, and expression of genes related to VILI in lung tissue, and inflammation in diaphragm tissue. RESULTS Transpulmonary peak pressure and histological damage score were higher in BIVENTHigh-Effort compared to BIVENTLow-Effort and PSV [16.1 ± 1.9cmH2O vs 12.8 ± 1.5cmH2O and 12.5 ± 1.6cmH2O, p = 0.015, and p = 0.010; median (interquartile range) 11 (9-13) vs 7 (6-9) and 7 (6-9), p = 0.021, and p = 0.029, respectively]. BIVENTHigh-Effort increased interleukin-6 expression compared to BIVENTLow-Effort (p = 0.035) as well as expressions of cytokine-induced neutrophil chemoattractant-1, amphiregulin, and type III procollagen compared to PSV (p = 0.001, p = 0.001, p = 0.004, respectively). Tumour necrosis factor-α expression in diaphragm tissue and blood bacteria were higher in BIVENTHigh-Effort than BIVENTLow-Effort (p = 0.002, p = 0.009, respectively). CONCLUSION BIVENT requires careful control of inspiratory effort to avoid lung and diaphragm damage, as well as blood bacteria. P0.1 might be considered a helpful parameter to optimize inspiratory effort.
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Affiliation(s)
- Daniela G. da Cruz
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel F. de Magalhães
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gisele A. Padilha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mariana C. da Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cassia L. Braga
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana R. Silva
- Laboratory of Immunopharmacology, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | | | - Vera L. Capelozzi
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Cynthia S. Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paolo Pelosi
- Anesthesiology 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
| | - Patricia R. M. Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro L. Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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Pellegrini M, Hedenstierna G, Larsson AS, Perchiazzi G. Inspiratory Efforts, Positive End-Expiratory Pressure, and External Resistances Influence Intraparenchymal Gas Redistribution in Mechanically Ventilated Injured Lungs. Front Physiol 2021; 11:618640. [PMID: 33633578 PMCID: PMC7900494 DOI: 10.3389/fphys.2020.618640] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 12/22/2020] [Indexed: 12/18/2022] Open
Abstract
Background Potentially harmful lung overstretch can follow intraparenchymal gas redistribution during mechanical ventilation. We hypothesized that inspiratory efforts characterizing spontaneous breathing, positive end-expiratory pressure (PEEP), and high inspiratory resistances influence inspiratory intraparenchymal gas redistribution. Methods This was an experimental study conducted on a swine model of mild acute respiratory distress syndrome. Dynamic computed tomography and respiratory mechanics were simultaneously acquired at different PEEP levels and external resistances, during both spontaneous breathing and controlled mechanical ventilation. Images were collected at two cranial-caudal levels. Delta-volume images (ΔVOLs) were obtained subtracting pairs of consecutive inspiratory images. The first three ΔVOLs, acquired for each analyzed breath, were used for the analysis of inspiratory pendelluft defined as intraparenchymal gas redistribution before the start of inspiratory flow at the airway opening. The following ΔVOLs were used for the analysis of gas redistribution during ongoing inspiratory flow at the airway opening. Results During the first flow-independent phase of inspiration, the pendelluft of gas was observed only during spontaneous breathing and along the cranial-to-caudal and nondependent-to-dependent directions. The pendelluft was reduced by high PEEP (p < 0.04 comparing PEEP 15 and PEEP 0 cm H2O) and low external resistances (p < 0.04 comparing high and low external resistance). During the flow-dependent phase of inspiration, two patterns were identified: (1) gas displacing characterized by large gas redistribution areas; (2) gas scattering characterized by small, numerous areas of gas redistribution. Gas displacing was observed at low PEEP, high external resistances, and it characterized controlled mechanical ventilation (p < 0.01, comparing high and low PEEP during controlled mechanical ventilation). Conclusions Low PEEP and high external resistances favored inspiratory pendelluft. During the flow-dependent phase of the inspiration, controlled mechanical ventilation and low PEEP and high external resistances favored larger phenomena of intraparenchymal gas redistribution (gas displacing) endangering lung stability.
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Affiliation(s)
- Mariangela Pellegrini
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.,Intensive Care Unit, Department of Anesthesia, Operation and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
| | - Göran Hedenstierna
- Hedenstierna Laboratory, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Anders Sune Larsson
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Gaetano Perchiazzi
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.,Intensive Care Unit, Department of Anesthesia, Operation and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
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Noninvasive ventilation in critically ill very old patients with pneumonia: A multicenter retrospective cohort study. PLoS One 2021; 16:e0246072. [PMID: 33503042 PMCID: PMC7840033 DOI: 10.1371/journal.pone.0246072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/12/2021] [Indexed: 12/01/2022] Open
Abstract
Background Very old patients (≥ 80 years-old, VOP) are increasingly admitted to intensive care units (ICUs). Community-acquired pneumonia (CAP) is a common reason for admission and the best strategy of support for respiratory failure in this scenario is not fully known. We evaluated whether noninvasive ventilation (NIV) would be beneficial compared to invasive mechanical ventilation (IMV) regarding hospital mortality. Methods Multicenter cohort study of VOPs admitted with CAP in need of IMV or NIV to 11 Brazilian ICUs from 2009 through 2012. We used logistic regression models to evaluate the association between the initial ventilatory strategy (NIV vs. IMV) and hospital mortality adjusting for confounding factors. We evaluated effect modification with interaction terms in pre-specified sub-groups. Results Of 369 VOPs admitted for CAP with respiratory failure, 232 (63%) received NIV and 137 (37%) received IMV as initial ventilatory strategy. IMV patients were sicker at baseline (median SOFA 8 vs. 4). Hospital mortality was 114/232 (49%) for NIV and 90/137 (66%) for IMV. For the comparison NIV vs. IMV (reference), the crude odds ratio (OR) was 0.50 (95% CI, 0.33–0.78, p = 0.002). This association was largely confounded by antecedent characteristics and non-respiratory SOFA (adjOR = 0.70, 95% CI, 0.41–1.20, p = 0.196). The fully adjusted model, additionally including Pao2/Fio2 ratio, pH and Paco2, yielded an adjOR of 0.81 (95% CI, 0.46–1.41, p = 0.452). There was no strong evidence of effect modification among relevant subgroups, such as Pao2/Fio2 ratio ≤ 150 (p = 0.30), acute respiratory acidosis (p = 0.42) and non-respiratory SOFA ≥ 4 (p = 0.53). Conclusions NIV was not associated with lower hospital mortality when compared to IMV in critically ill VOP admitted with CAP, but there was no strong signal of harm from its use. The main confounders of this association were both the severity of respiratory dysfunction and of extra-respiratory organ failures.
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Meinen RD, Alali YI, Al-Subu A, Wilhelm M, Wraight CL, McAdams RM, Limjoco JJ, McCulley DJ. Neurally-Adjusted Ventilatory Assist Can Facilitate Extubation in Neonates With Congenital Diaphragmatic Hernia. Respir Care 2021; 66:41-49. [PMID: 32753531 PMCID: PMC9993818 DOI: 10.4187/respcare.07681] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Congenital diaphragmatic hernia is associated with a high risk of neonatal mortality and long-term morbidity due to lung hypoplasia, pulmonary hypertension, and prolonged exposure to positive-pressure ventilation. Ventilator-associated lung injury may be reduced by using approaches that facilitate the transition from invasive ventilation to noninvasive ventilation (NIV), such as with neurally-adjusted ventilatory assist (NAVA). We reported our use of NAVA in neonatal patients with congenital diaphragmatic hernia during the transition from invasive ventilation to NIV. METHODS A retrospective analysis of neonatal subjects with congenital diaphragmatic hernia admitted to a tertiary care children's hospital between December 2015 and May 2018 was conducted. Subject data and factors that affected the use of NAVA were analyzed. RESULTS Ten neonatal subjects with congenital diaphragmatic hernia were placed on NAVA, and 6 were successfully transitioned, after surgery, from pressure control synchronized intermittent mandatory ventilation to invasive ventilation with NAVA and then to NIV with NAVA without the need for re-intubation. The transition from pressure control synchronized intermittent mandatory ventilation to invasive ventilation with NAVA resulted in a decrease in peak inspiratory pressure, mean airway pressure, and [Formula: see text]. Barriers to the use of NAVA included symptomatic pleural effusion or chylothorax and pulmonary sequestration. CONCLUSIONS Both invasive ventilation with NAVA and NIV with NAVA were used successfully in subjects with congenital diaphragmatic hernia during the transition from invasive ventilation to NIV. The transition to NAVA was associated with a decrease in peak inspiratory pressure, mean airway pressure, and the need for supplemental oxygen. A prospective trial is needed to determine the short- and long-term impacts of this mode of ventilation in neonates with congenital diaphragmatic hernia.
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Affiliation(s)
- Ryan D Meinen
- Division of Neonatology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Yousef I Alali
- Division of Respiratory Therapy, University of Wisconsin-Madison, Madison, Wisconsin
| | - Awni Al-Subu
- Division of Critical Care Medicine, Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Michael Wilhelm
- Division of Critical Care Medicine, Department of Pediatrics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Catherine L Wraight
- Division of Neonatology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Ryan M McAdams
- Division of Neonatology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Jamie J Limjoco
- Division of Neonatology, University of Wisconsin-Madison, Madison, Wisconsin
| | - David J McCulley
- Division of Neonatology, University of Wisconsin-Madison, Madison, Wisconsin.
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Low Spontaneous Breathing Effort during Extracorporeal Membrane Oxygenation in a Porcine Model of Severe Acute Respiratory Distress Syndrome. Anesthesiology 2020; 133:1106-1117. [PMID: 32898217 DOI: 10.1097/aln.0000000000003538] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND A lung rest strategy is recommended during extracorporeal membrane oxygenation in severe acute respiratory distress syndrome (ARDS). However, spontaneous breathing modes are frequently used in this context. The impact of this approach may depend on the intensity of breathing efforts. The authors aimed to determine whether a low spontaneous breathing effort strategy increases lung injury, compared to a controlled near-apneic ventilation, in a porcine severe ARDS model assisted by extracorporeal membrane oxygenation. METHODS Twelve female pigs were subjected to lung injury by repeated lavages, followed by 2-h injurious ventilation. Thereafter, animals were connected to venovenous extracorporeal membrane oxygenation and during the first 3 h, ventilated with near-apneic ventilation (positive end-expiratory pressure, 10 cm H2O; driving pressure, 10 cm H2O; respiratory rate, 5/min). Then, animals were allocated into (1) near-apneic ventilation, which continued with the previous ventilatory settings; and (2) spontaneous breathing: neuromuscular blockers were stopped, sweep gas flow was decreased until regaining spontaneous efforts, and ventilation was switched to pressure support mode (pressure support, 10 cm H2O; positive end-expiratory pressure, 10 cm H2O). In both groups, sweep gas flow was adjusted to keep Paco2 between 30 and 50 mmHg. Respiratory and hemodynamic as well as electric impedance tomography data were collected. After 24 h, animals were euthanized and lungs extracted for histologic tissue analysis. RESULTS Compared to near-apneic group, the spontaneous breathing group exhibited a higher respiratory rate (52 ± 17 vs. 5 ± 0 breaths/min; mean difference, 47; 95% CI, 34 to 59; P < 0.001), but similar tidal volume (2.3 ± 0.8 vs. 2.8 ± 0.4 ml/kg; mean difference, 0.6; 95% CI, -0.4 to 1.4; P = 0.983). Extracorporeal membrane oxygenation settings and gas exchange were similar between groups. Dorsal ventilation was higher in the spontaneous breathing group. No differences were observed regarding histologic lung injury. CONCLUSIONS In an animal model of severe ARDS supported with extracorporeal membrane oxygenation, spontaneous breathing characterized by low-intensity efforts, high respiratory rates, and very low tidal volumes did not result in increased lung injury compared to controlled near-apneic ventilation. EDITOR’S PERSPECTIVE
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Panwar R, Madotto F, Laffey JG, van Haren FMP. Compliance Phenotypes in Early Acute Respiratory Distress Syndrome before the COVID-19 Pandemic. Am J Respir Crit Care Med 2020; 202:1244-1252. [PMID: 32805143 PMCID: PMC7605177 DOI: 10.1164/rccm.202005-2046oc] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Rationale: A novel model of phenotypes based on set thresholds of respiratory system compliance (Crs) was recently postulated in context of coronavirus disease (COVID-19) acute respiratory distress syndrome (ARDS). In particular, the dissociation between the degree of hypoxemia and Crs was characterized as a distinct ARDS phenotype. Objectives: To determine whether such Crs-based phenotypes existed among patients with ARDS before the COVID-19 pandemic and to closely examine the Crs–mortality relationship. Methods: We undertook a secondary analysis of patients with ARDS, who were invasively ventilated on controlled modes and enrolled in a large, multinational, epidemiological study. We assessed Crs, degree of hypoxemia, and associated Crs-based phenotypic patterns with their characteristics and outcomes. Measurements and Main Results: Among 1,117 patients with ARDS who met inclusion criteria, the median Crs was 30 (interquartile range, 23–40) ml/cm H2O. One hundred thirty-six (12%) patients had preserved Crs (≥50 ml/cm H2O; phenotype with low elastance [“phenotype L”]), and 827 (74%) patients had poor Crs (<40 ml/cm H2O; phenotype with high elastance [“phenotype H”]). Compared with those with phenotype L, patients with phenotype H were sicker and had more comorbidities and higher hospital mortality (32% vs. 45%; P < 0.05). A near complete dissociation between PaO2/FiO2 and Crs was observed. Of 136 patients with phenotype L, 58 (43%) had a PaO2/FiO2 < 150. In a multivariable-adjusted analysis, the Crs was independently associated with hospital mortality (adjusted odds ratio per ml/cm H2O increase, 0.988; 95% confidence interval, 0.979–0.996; P = 0.005). Conclusions: A wide range of Crs was observed in non–COVID-19 ARDS. Approximately one in eight patients had preserved Crs. PaO2/FiO2 and Crs were dissociated. Lower Crs was independently associated with higher mortality. The Crs–mortality relationship lacked a clear transition threshold.
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Affiliation(s)
- Rakshit Panwar
- ICU, John Hunter Hospital, Newcastle, New South Wales, Australia.,School of Medicine and Public Health, University of Newcastle, Newcastle, New South Wales, Australia
| | - Fabiana Madotto
- Scientific Institute for Research, Hospitalization and Health Care Multimedica, Sesto San Giovanni, Milan, Italy
| | - John G Laffey
- Anaesthesia and Intensive Care Medicine, School of Medicine, and.,Regenerative Medicine Institute, CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway, Ireland.,Department of Anaesthesia, University Hospital Galway, Saolta Hospital Group, Galway, Ireland
| | - Frank M P van Haren
- Medical School, Australian National University, Canberra, New South Wales, Australia.,Faculty of Health, University of Canberra, Canberra, New South Wales, Australia; and.,ICU, The Canberra Hospital, Canberra, New South Wales, Australia
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48
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Tonelli R, Fantini R, Tabbì L, Castaniere I, Pisani L, Pellegrino MR, Della Casa G, D'Amico R, Girardis M, Nava S, Clini EM, Marchioni A. Early Inspiratory Effort Assessment by Esophageal Manometry Predicts Noninvasive Ventilation Outcome in De Novo Respiratory Failure. A Pilot Study. Am J Respir Crit Care Med 2020; 202:558-567. [PMID: 32325004 PMCID: PMC7427381 DOI: 10.1164/rccm.201912-2512oc] [Citation(s) in RCA: 144] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Rationale: The role of inspiratory effort still has to be determined as a potential predictor of noninvasive mechanical ventilation (NIV) failure in acute hypoxic de novo respiratory failure.Objectives: To explore the hypothesis that inspiratory effort might be a major determinant of NIV failure in these patients.Methods: Thirty consecutive patients with acute hypoxic de novo respiratory failure admitted to a single center and candidates for a 24-hour NIV trial were enrolled. Clinical features, tidal change in esophageal pressure (ΔPes), tidal change in dynamic transpulmonary pressure (ΔPl), expiratory Vt, and respiratory rate were recorded on admission and 2-4 to 12-24 hours after NIV start and were tested for correlation with outcomes.Measurements and Main Results: ΔPes and ΔPes/ΔPl ratio were significantly lower 2 hours after NIV start in patients who successfully completed the NIV trial (n = 18) compared with those who needed endotracheal intubation (n = 12) (median [interquartile range], 11 [8-15] cm H2O vs. 31.5 [30-36] cm H2O; P < 0.0001), whereas other variables differed later. ΔPes was not related to other predictors of NIV failure at baseline. NIV-induced reduction in ΔPes of 10 cm H2O or more after 2 hours of treatment was strongly associated with avoidance of intubation and represented the most accurate predictor of treatment success (odds ratio, 15; 95% confidence interval, 2.8-110; P = 0.001 and area under the curve, 0.97; 95% confidence interval, 0.91-1; P < 0.0001).Conclusions: The magnitude of inspiratory effort relief as assessed by ΔPes variation within the first 2 hours of NIV was an early and accurate predictor of NIV outcome at 24 hours.Clinical trial registered with www.clinicaltrials.gov (NCT03826797).
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Affiliation(s)
- Roberto Tonelli
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences.,Clinical and Experimental Medicine Doctoral Program
| | - Riccardo Fantini
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences
| | - Luca Tabbì
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences
| | - Ivana Castaniere
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences.,Clinical and Experimental Medicine Doctoral Program
| | - Lara Pisani
- Department of Specialistic, Diagnostic and Experimental Medicine, University of Bologna, Bologna, Italy
| | | | | | - Roberto D'Amico
- Statistics Unit, Department of Diagnostics, Clinical and Public Health Medicine, and
| | - Massimo Girardis
- Intensive Care Unit, Department of Surgical, Medical, Dental and Morphological Sciences related to Transplants Oncology and Regenerative Medicine, University Hospital of Modena, University of Modena and Reggio Emilia, Modena, Italy; and
| | - Stefano Nava
- Department of Specialistic, Diagnostic and Experimental Medicine, University of Bologna, Bologna, Italy
| | - Enrico M Clini
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences
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Analgesia and sedation in patients with ARDS. Intensive Care Med 2020; 46:2342-2356. [PMID: 33170331 PMCID: PMC7653978 DOI: 10.1007/s00134-020-06307-9] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 10/20/2020] [Indexed: 02/06/2023]
Abstract
Acute Respiratory Distress Syndrome (ARDS) is one of the most demanding conditions in an Intensive Care Unit (ICU). Management of analgesia and sedation in ARDS is particularly challenging. An expert panel was convened to produce a "state-of-the-art" article to support clinicians in the optimal management of analgesia/sedation in mechanically ventilated adults with ARDS, including those with COVID-19. Current ICU analgesia/sedation guidelines promote analgesia first and minimization of sedation, wakefulness, delirium prevention and early rehabilitation to facilitate ventilator and ICU liberation. However, these strategies cannot always be applied to patients with ARDS who sometimes require deep sedation and/or paralysis. Patients with severe ARDS may be under-represented in analgesia/sedation studies and currently recommended strategies may not be feasible. With lightened sedation, distress-related symptoms (e.g., pain and discomfort, anxiety, dyspnea) and patient-ventilator asynchrony should be systematically assessed and managed through interprofessional collaboration, prioritizing analgesia and anxiolysis. Adaptation of ventilator settings (e.g., use of a pressure-set mode, spontaneous breathing, sensitive inspiratory trigger) should be systematically considered before additional medications are administered. Managing the mechanical ventilator is of paramount importance to avoid the unnecessary use of deep sedation and/or paralysis. Therefore, applying an "ABCDEF-R" bundle (R = Respiratory-drive-control) may be beneficial in ARDS patients. Further studies are needed, especially regarding the use and long-term effects of fast-offset drugs (e.g., remifentanil, volatile anesthetics) and the electrophysiological assessment of analgesia/sedation (e.g., electroencephalogram devices, heart-rate variability, and video pupillometry). This review is particularly relevant during the COVID-19 pandemic given drug shortages and limited ICU-bed capacity.
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Current and evolving standards of care for patients with ARDS. Intensive Care Med 2020; 46:2157-2167. [PMID: 33156382 PMCID: PMC7646492 DOI: 10.1007/s00134-020-06299-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 10/13/2020] [Indexed: 12/16/2022]
Abstract
Care for patients with acute respiratory distress syndrome (ARDS) has changed considerably over the 50 years since its original description. Indeed, standards of care continue to evolve as does how this clinical entity is defined and how patients are grouped and treated in clinical practice. In this narrative review we discuss current standards – treatments that have a solid evidence base and are well established as targets for usual care – and also evolving standards – treatments that have promise and may become widely adopted in the future. We focus on three broad domains of ventilatory management, ventilation adjuncts, and pharmacotherapy. Current standards for ventilatory management include limitation of tidal volume and airway pressure and standard approaches to setting PEEP, while evolving standards might focus on limitation of driving pressure or mechanical power, individual titration of PEEP, and monitoring efforts during spontaneous breathing. Current standards in ventilation adjuncts include prone positioning in moderate-severe ARDS and veno-venous extracorporeal life support after prone positioning in patients with severe hypoxemia or who are difficult to ventilate. Pharmacotherapy current standards include corticosteroids for patients with ARDS due to COVID-19 and employing a conservative fluid strategy for patients not in shock; evolving standards may include steroids for ARDS not related to COVID-19, or specific biological agents being tested in appropriate sub-phenotypes of ARDS. While much progress has been made, certainly significant work remains to be done and we look forward to these future developments.
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