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Gallice T, Cugy E, Cugy D, Laimay J, Branchard O, Germain C, Dehail P, Cuny E, Engelhardt J. Effect of a Speaking Valve on Nasal Airflow During Tracheostomy Weaning: A Case Series. Neurocrit Care 2024:10.1007/s12028-024-01966-8. [PMID: 38506973 DOI: 10.1007/s12028-024-01966-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 02/21/2024] [Indexed: 03/22/2024]
Affiliation(s)
- Thomas Gallice
- Aging, Chronic Diseases, Technology, Disability, and Environment Team, Bordeaux Research Center for Population Health, Bordeaux Segalen University, UMR_S 1219, 33000, Bordeaux, France.
- Swallowing Evaluation Unit, Physical and Rehabilitation Medicine Unit, Tastet-Girard Hospital, Bordeaux University Hospital, 33000, Bordeaux, France.
- Neurosurgery Unit B, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France.
- Neurological Intensive Care Unit, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France.
| | - Emmanuelle Cugy
- Swallowing Evaluation Unit, Physical and Rehabilitation Medicine Unit, Tastet-Girard Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
- Physical and Rehabilitation Medicine Unit, Arcachon Hospital, 33260, La Teste de Buch, France
- Physical and Rehabilitation Medicine Unit, Tastet-Girard Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Didier Cugy
- Sleep Medicine Unit, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Julie Laimay
- Neurosurgery Unit B, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
- Neurological Intensive Care Unit, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Olivier Branchard
- Neurosurgery Unit B, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Christine Germain
- Medical Information Unit, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Patrick Dehail
- Aging, Chronic Diseases, Technology, Disability, and Environment Team, Bordeaux Research Center for Population Health, Bordeaux Segalen University, UMR_S 1219, 33000, Bordeaux, France
- Physical and Rehabilitation Medicine Unit, Tastet-Girard Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
| | - Emmanuel Cuny
- Neurosurgery Unit B, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
- Neurodegenerative Diseases Institute, Bordeaux University, 33000, Bordeaux, France
- CNRS, Neurodegenerative Diseases Institute, 33000, Bordeaux, France
| | - Julien Engelhardt
- Neurosurgery Unit B, Pellegrin Hospital, Bordeaux University Hospital, 33000, Bordeaux, France
- Polytechnic Institute of Bordeaux, Centre National de la Recherche Scientifique, Institut de Mathématiques de Bordeaux, Bordeaux University, 33400, Bordeaux, France
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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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3
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Burt JS, Davenport MP, Welch JF, Davenport PW. fNIRS analysis of rostral prefrontal cortex activity and perception of inspiratory loads. Respir Physiol Neurobiol 2023; 316:104113. [PMID: 37442516 DOI: 10.1016/j.resp.2023.104113] [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: 02/21/2023] [Revised: 06/20/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023]
Abstract
It is well-established that the brainstem is responsible for the automatic control of breathing, however, cortical areas control perception and conscious breathing. This study investigated activity in the prefrontal cortex (PFC) during breathing difficulty using functional near-infrared spectroscopy (fNIRS). It was hypothesized that extrinsic inspiratory loads will elicit regional changes in PFC activity and increased perception ratings, as a function of load magnitude and type. Participants were exposed to varying magnitudes of resistive (R) and pressure threshold (PT) inspiratory loads to increase breathing effort. Perception ratings of breathing effort and load magnitude were positively correlated (p < 0.05). PT loads were rated more effortful than R loads (p < 0.05). Differences in perceived effort were a function of inspiratory pressure-time-product (PTP) and inspiratory work of breathing (WoB). PFC activity increased with the largest PT load (p < 0.01), suggesting that the PFC is involved in processing respiratory stimuli. The results support the hypothesis that the PFC is an element of the neural network mediating effortful breathing perception.
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Affiliation(s)
- Juliana S Burt
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, 1333 Center Drive, Gainesville, FL 32610, USA
| | - Matthew P Davenport
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, 1333 Center Drive, Gainesville, FL 32610, USA
| | - Joseph F Welch
- Department of Physical Therapy, College of Veterinary Medicine, University of Florida, 1333 Center Drive, Gainesville, FL 32610, USA; School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Paul W Davenport
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, 1333 Center Drive, Gainesville, FL 32610, USA.
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Shimatani T, Kyogoku M, Ito Y, Takeuchi M, Khemani RG. Fundamental concepts and the latest evidence for esophageal pressure monitoring. J Intensive Care 2023; 11:22. [PMID: 37217973 DOI: 10.1186/s40560-023-00671-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 05/16/2023] [Indexed: 05/24/2023] Open
Abstract
Transpulmonary pressure is an essential physiologic concept as it reflects the true pressure across the alveoli, and is a more precise marker for lung stress. To calculate transpulmonary pressure, one needs an estimate of both alveolar pressure and pleural pressure. Airway pressure during conditions of no flow is the most widely accepted surrogate for alveolar pressure, while esophageal pressure remains the most widely measured surrogate marker for pleural pressure. This review will cover important concepts and clinical applications for esophageal manometry, with a particular focus on how to use the information from esophageal manometry to adjust or titrate ventilator support. The most widely used method for measuring esophageal pressure uses an esophageal balloon catheter, although these measurements can be affected by the volume of air in the balloon. Therefore, when using balloon catheters, it is important to calibrate the balloon to ensure the most appropriate volume of air, and we discuss several methods which have been proposed for balloon calibration. In addition, esophageal balloon catheters only estimate the pleural pressure over a certain area within the thoracic cavity, which has resulted in a debate regarding how to interpret these measurements. We discuss both direct and elastance-based methods to estimate transpulmonary pressure, and how they may be applied for clinical practice. Finally, we discuss a number of applications for esophageal manometry and review many of the clinical studies published to date which have used esophageal pressure. These include the use of esophageal pressure to assess lung and chest wall compliance individually which can provide individualized information for patients with acute respiratory failure in terms of setting PEEP, or limiting inspiratory pressure. In addition, esophageal pressure has been used to estimate effort of breathing which has application for ventilator weaning, detection of upper airway obstruction after extubation, and detection of patient and mechanical ventilator asynchrony.
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Affiliation(s)
- Tatsutoshi Shimatani
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima-shi, Hiroshima, Japan.
- Department of Critical Care Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
| | - Miyako Kyogoku
- Department of Intensive Care Medicine, Osaka Women's and Children's Hospital, 840 Murodo-cho, Osaka, Izumi, Japan
- Department of Critical Care Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Yukie Ito
- Department of Intensive Care Medicine, Osaka Women's and Children's Hospital, 840 Murodo-cho, Osaka, Izumi, Japan
| | - Muneyuki Takeuchi
- Department of Intensive Care Medicine, Osaka Women's and Children's Hospital, 840 Murodo-cho, Osaka, Izumi, Japan
- Department of Critical Care Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Robinder G Khemani
- Pediatric ICU, Department of Anesthesiology and Critical Care Medicine, Children's Hospital Los Angeles, 4650 Sunset Blvd., CA, Los Angeles, USA
- Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA, 1975, USA
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5
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Victor MH, Maximo MROA, Matsumoto MMS, Pereira SM, Tucci MR. Mixed-integer quadratic programming approach for noninvasive estimation of respiratory effort profile during pressure support ventilation. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2023; 39:e3668. [PMID: 36509708 DOI: 10.1002/cnm.3668] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 11/01/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Information about respiratory mechanics such as resistance, elastance, and muscular pressure is important to mitigate ventilator-induced lung injury. Particularly during pressure support ventilation, the available options to quantify breathing effort and calculate respiratory system mechanics are often invasive or complex. We herein propose a robust and flexible estimation of respiratory effort better than current methods. We developed a method for non-invasively estimating breathing effort using only flow and pressure signals. Mixed-integer quadratic programming (MIQP) was employed, and the binary variables were the switching moments of the respiratory effort waveform. Mathematical constraints, based on ventilation physiology, were set for some variables to restrict feasible solutions. Simulated and patient data were used to verify our method, and the results were compared to an established estimation methodology. Our algorithm successfully estimated the respiratory effort, resistance, and elastance of the respiratory system, resulting in more robust performance and faster solver times than a previously proposed algorithm that used quadratic programming (QP) techniques. In a numerical simulation benchmark, the worst-case errors for resistance and elastance were 25% and 23% for QP versus <0.1% and <0.1% for MIQP, whose solver times were 4.7 s and 0.5 s, respectively. This approach can estimate several breathing effort profiles and identify the respiratory system's mechanical properties in invasively ventilated critically ill patients.
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Affiliation(s)
- Marcus H Victor
- Medical Electrical Devices Laboratory (LabMed), Electronics Engineering, Aeronautics Institute of Technology, São Paulo, Brazil
- Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Marcos R O A Maximo
- Medical Electrical Devices Laboratory (LabMed), Electronics Engineering, Aeronautics Institute of Technology, São Paulo, Brazil
- Autonomous Computational Systems Lab (LAB-SCA), Computer Science Division, Aeronautics Institute of Technology, São Paulo, Brazil
| | - Monica M S Matsumoto
- Medical Electrical Devices Laboratory (LabMed), Electronics Engineering, Aeronautics Institute of Technology, São Paulo, Brazil
| | - Sérgio M Pereira
- Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- Department of Anesthesia and Pain Medicine, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Mauro R Tucci
- Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
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Ríos-Castro F, González-Seguel F, Molina J. Respiratory drive, inspiratory effort, and work of breathing: review of definitions and non-invasive monitoring tools for intensive care ventilators during pandemic times. Medwave 2022; 22:e8724. [DOI: 10.5867/medwave.2022.03.002550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 04/28/2022] [Indexed: 11/27/2022] Open
Abstract
Technological advances in mechanical ventilation have been essential to increasing the survival rate in intensive care units. Usually, patients needing mechanical ventilation use controlled ventilation to override the patient’s respiratory muscles and favor lung protection. Weaning from mechanical ventilation implies a transition towards spontaneous breathing, mainly using assisted mechanical ventilation. In this transition, the challenge for clinicians is to avoid under and over assistance and minimize excessive respiratory effort and iatrogenic diaphragmatic and lung damage. Esophageal balloon monitoring allows objective measurements of respiratory muscle activity in real time, but there are still limitations to its routine application in intensive care unit patients using mechanical ventilation. Like the esophageal balloon, respiratory muscle electromyography and diaphragmatic ultrasound are minimally invasive tools requiring specific training that monitor respiratory muscle activity. Particularly during the coronavirus disease pandemic, non invasive tools available on mechanical ventilators to monitor respiratory drive, inspiratory effort, and work of breathing have been extended to individualize mechanical ventilation based on patient’s needs. This review aims to identify the conceptual definitions of respiratory drive, inspiratory effort, and work of breathing and to identify non invasive maneuvers available on intensive care ventilators to measure these parameters. The literature highlights that although respiratory drive, inspiratory effort, and work of breathing are intuitive concepts, even distinguished authors disagree on their definitions.
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7
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Kato K, Cammann VL, Napp LC, Szawan KA, Micek J, Dreiding S, Levinson RA, Petkova V, Würdinger M, Patrascu A, Sumalinog R, Gili S, Clarenbach CF, Kohler M, Wischnewsky M, Citro R, Vecchione C, Bossone E, Neuhaus M, Franke J, Meder B, Jaguszewski M, Noutsias M, Knorr M, Heiner S, D'Ascenzo F, Dichtl W, Burgdorf C, Kherad B, Tschöpe C, Sarcon A, Shinbane J, Rajan L, Michels G, Pfister R, Cuneo A, Jacobshagen C, Karakas M, Koenig W, Pott A, Meyer P, Roffi M, Banning A, Wolfrum M, Cuculi F, Kobza R, Fischer TA, Vasankari T, Airaksinen KEJ, Budnik M, Dworakowski R, MacCarthy P, Kaiser C, Osswald S, Galiuto L, Chan C, Bridgman P, Beug D, Delmas C, Lairez O, Gilyarova E, Shilova A, Gilyarov M, El-Battrawy I, Akin I, Kozel M, Tousek P, Winchester DE, Galuszka J, Ukena C, Poglajen G, Carrilho-Ferreira P, Hauck C, Paolini C, Bilato C, Sano M, Ishibashi I, Takahara M, Himi T, Kobayashi Y, Prasad A, Rihal CS, Liu K, Schulze PC, Bianco M, Jörg L, Rickli H, Pestana G, Nguyen TH, Böhm M, Maier LS, Pinto FJ, Widimský P, Felix SB, Opolski G, Braun-Dullaeus RC, Rottbauer W, Hasenfuß G, Pieske BM, Schunkert H, Borggrefe M, Thiele H, Bauersachs J, Katus HA, Horowitz JD, Di Mario C, Münzel T, Crea F, Bax JJ, Lüscher TF, Ruschitzka F, Ghadri JR, Templin C. Prognostic impact of acute pulmonary triggers in patients with takotsubo syndrome: new insights from the International Takotsubo Registry. ESC Heart Fail 2021; 8:1924-1932. [PMID: 33713566 PMCID: PMC8120351 DOI: 10.1002/ehf2.13165] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/20/2020] [Accepted: 11/24/2020] [Indexed: 02/01/2023] Open
Abstract
AIMS Acute pulmonary disorders are known physical triggers of takotsubo syndrome (TTS). This study aimed to investigate prevalence of acute pulmonary triggers in patients with TTS and their impact on outcomes. METHODS AND RESULTS Patients with TTS were enrolled from the International Takotsubo Registry and screened for triggering factors and comorbidities. Patients were categorized into three groups (acute pulmonary trigger, chronic lung disease, and no lung disease) to compare clinical characteristics and outcomes. Of the 1670 included patients with TTS, 123 (7%) were identified with an acute pulmonary trigger, and 194 (12%) had a known history of chronic lung disease. The incidence of cardiogenic shock was highest in patients with an acute pulmonary trigger compared with those with chronic lung disease or without lung disease (17% vs. 10% vs. 9%, P = 0.017). In-hospital mortality was also higher in patients with an acute pulmonary trigger than in the other two groups, although not significantly (5.7% vs. 1.5% vs. 4.2%, P = 0.13). Survival analysis demonstrated that patients with an acute pulmonary trigger had the worst long-term outcome (P = 0.002). The presence of an acute pulmonary trigger was independently associated with worse long-term mortality (hazard ratio 2.12, 95% confidence interval 1.33-3.38; P = 0.002). CONCLUSIONS The present study demonstrates that TTS is related to acute pulmonary triggers in 7% of all TTS patients, which accounts for 21% of patients with physical triggers. The presence of acute pulmonary trigger is associated with a severe in-hospital course and a worse long-term outcome.
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Affiliation(s)
- Ken Kato
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Victoria L Cammann
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - L Christian Napp
- Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - Konrad A Szawan
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Jozef Micek
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Sara Dreiding
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Rena A Levinson
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Vanya Petkova
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Michael Würdinger
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Alexandru Patrascu
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Rafael Sumalinog
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | | | | | - Malcolm Kohler
- Pulmonary Division, University Hospital of Zurich, Zurich, Switzerland
| | | | - Rodolfo Citro
- Heart Department, University Hospital 'San Giovanni di Dio e Ruggi d'Aragona', Salerno, Italy
| | - Carmine Vecchione
- Heart Department, University Hospital 'San Giovanni di Dio e Ruggi d'Aragona', Salerno, Italy
| | - Eduardo Bossone
- Division of Cardiology, Antonio Cardarelli Hospital, Naples, Italy
| | - Michael Neuhaus
- Department of Cardiology, Kantonsspital Frauenfeld, Frauenfeld, Switzerland
| | - Jennifer Franke
- Department of Cardiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Benjamin Meder
- Department of Cardiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Milosz Jaguszewski
- First Department of Cardiology, Medical University of Gdansk, Gdansk, Poland
| | - Michel Noutsias
- Department of Internal Medicine III, Division of Cardiology, Angiology and Intensive Medical Care, University Hospital Halle, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Maike Knorr
- Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Susanne Heiner
- Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Fabrizio D'Ascenzo
- Division of Cardiology, Department of Medical Sciences, AOU Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Wolfgang Dichtl
- University Hospital for Internal Medicine III (Cardiology and Angiology), Medical University Innsbruck, Innsbruck, Austria
| | | | - Behrouz Kherad
- Department of Cardiology, Charité, Campus Rudolf Virchow, Berlin, Germany
| | - Carsten Tschöpe
- Department of Cardiology, Charité, Campus Rudolf Virchow, Berlin, Germany
| | - Annahita Sarcon
- Section of Cardiac Electrophysiology, Department of Medicine, University of California-San Francisco, San Francisco, CA, USA
| | - Jerold Shinbane
- Division of Cardiovascular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | | | - Guido Michels
- Department of Internal Medicine III, Heart Center University of Cologne, Cologne, Germany
| | - Roman Pfister
- Department of Internal Medicine III, Heart Center University of Cologne, Cologne, Germany
| | - Alessandro Cuneo
- Krankenhaus 'Maria Hilf' Medizinische Klinik, Stadtlohn, Germany
| | - Claudius Jacobshagen
- Clinic for Cardiology and Pneumology, Georg August University of Goettingen, Goettingen, Germany
| | - Mahir Karakas
- Department of General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, Hamburg, Germany
| | - Wolfgang Koenig
- Deutsches Herzzentrum München, Technische Universität München, Munich, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Alexander Pott
- Department of Internal Medicine II - Cardiology, University of Ulm, Medical Center, Ulm, Germany
| | - Philippe Meyer
- Service de Cardiologie, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Marco Roffi
- Service de Cardiologie, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Adrian Banning
- Department of Cardiology, John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Mathias Wolfrum
- Department of Cardiology, Kantonsspital Lucerne, Lucerne, Switzerland
| | - Florim Cuculi
- Department of Cardiology, Kantonsspital Lucerne, Lucerne, Switzerland
| | - Richard Kobza
- Department of Cardiology, Kantonsspital Lucerne, Lucerne, Switzerland
| | - Thomas A Fischer
- Department of Cardiology, Kantonsspital Winterthur, Winterthur, Switzerland
| | - Tuija Vasankari
- Heart Center, Turku University Hospital, University of Turku, Turku, Finland
| | | | - Monika Budnik
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | | | | | - Christoph Kaiser
- Department of Cardiology, University Hospital of Basel, Basel, Switzerland
| | - Stefan Osswald
- Department of Cardiology, University Hospital of Basel, Basel, Switzerland
| | - Leonarda Galiuto
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Christina Chan
- Department of Cardiology, Christchurch Hospital, Christchurch, New Zealand
| | - Paul Bridgman
- Department of Cardiology, Christchurch Hospital, Christchurch, New Zealand
| | - Daniel Beug
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Clément Delmas
- Department of Cardiology and Cardiac Imaging Center, University Hospital of Rangueil, Toulouse, France
| | - Olivier Lairez
- Department of Cardiology and Cardiac Imaging Center, University Hospital of Rangueil, Toulouse, France
| | - Ekaterina Gilyarova
- Intensive Coronary Care Unit, Moscow City Hospital # 1 named after N. Pirogov, Moscow, Russia
| | - Alexandra Shilova
- Intensive Coronary Care Unit, Moscow City Hospital # 1 named after N. Pirogov, Moscow, Russia
| | - Mikhail Gilyarov
- Intensive Coronary Care Unit, Moscow City Hospital # 1 named after N. Pirogov, Moscow, Russia
| | - Ibrahim El-Battrawy
- First Department of Medicine, Faculty of Medicine, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site, Heidelberg-Mannheim, Mannheim, Germany
| | - Ibrahim Akin
- First Department of Medicine, Faculty of Medicine, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site, Heidelberg-Mannheim, Mannheim, Germany
| | - Martin Kozel
- Cardiocenter, Third Faculty of Medicine, Charles University in Prague, University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Petr Tousek
- Cardiocenter, Third Faculty of Medicine, Charles University in Prague, University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - David E Winchester
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Jan Galuszka
- Department of Internal Medicine I - Cardiology, University Hospital Olomouc, Olomouc, Czech Republic
| | - Christian Ukena
- Klinik für Innere Medizin III, Universitätsklinikum des Saarlandes, Homburg, Germany
| | - Gregor Poglajen
- Advanced Heart Failure and Transplantation Center, University Medical Center Ljubljana, Ljubljana, Slovenia
| | - Pedro Carrilho-Ferreira
- Cardiology Department, Santa Maria University Hospital (CHLN), Lisbon Academic Medical Centre and Cardiovascular Centre of the University of Lisbon (CCUL), Lisbon School of Medicine, Universidade de Lisboa, Lisbon, Portugal
| | - Christian Hauck
- Department of Internal Medicine II, University Medical Center Regensburg, Regensburg, Germany
| | - Carla Paolini
- Local Health Unit n.8, Cardiology Unit, Arzignano, Vicenza, Italy
| | - Claudio Bilato
- Local Health Unit n.8, Cardiology Unit, Arzignano, Vicenza, Italy
| | - Masanori Sano
- Department of Cardiology, Chiba Emergency Medical Center, Chiba, Japan
| | - Iwao Ishibashi
- Department of Cardiology, Chiba Emergency Medical Center, Chiba, Japan
| | | | - Toshiharu Himi
- Division of Cardiology, Kimitsu Central Hospital, Kisarazu, Japan
| | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Abhiram Prasad
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Charanjit S Rihal
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Kan Liu
- Division of Cardiology, Heart and Vascular Center, University of Iowa, Iowa City, Iowa, USA
| | - P Christian Schulze
- Department of Internal Medicine I, JenaUniversity Hospital, Friedrich-Schiller-University Jena, Jena, Germany
| | - Matteo Bianco
- Division of Cardiology, A.O.U San Luigi Gonzaga, Turin, Italy
| | - Lucas Jörg
- Department of Cardiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Hans Rickli
- Department of Cardiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Gonçalo Pestana
- Department of Cardiology, Centro Hospitalar Universitário de São João, E.P.E, Porto, Portugal
| | - Thanh H Nguyen
- Department of Cardiology, Basil Hetzel Institute, Queen Elizabeth Hospital, University of Adelaide, Adelaide, Australia
| | - Michael Böhm
- Klinik für Innere Medizin III, Universitätsklinikum des Saarlandes, Homburg, Germany
| | - Lars S Maier
- Department of Internal Medicine II, University Medical Center Regensburg, Regensburg, Germany
| | - Fausto J Pinto
- Cardiology Department, Santa Maria University Hospital (CHLN), Lisbon Academic Medical Centre and Cardiovascular Centre of the University of Lisbon (CCUL), Lisbon School of Medicine, Universidade de Lisboa, Lisbon, Portugal
| | - Petr Widimský
- Cardiocenter, Third Faculty of Medicine, Charles University in Prague, University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Stephan B Felix
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Grzegorz Opolski
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | | | - Wolfgang Rottbauer
- Department of Internal Medicine II - Cardiology, University of Ulm, Medical Center, Ulm, Germany
| | - Gerd Hasenfuß
- Clinic for Cardiology and Pneumology, Georg August University of Goettingen, Goettingen, Germany
| | - Burkert M Pieske
- Department of Cardiology, Charité, Campus Rudolf Virchow, Berlin, Germany
| | - Heribert Schunkert
- Deutsches Herzzentrum München, Technische Universität München, Munich, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Martin Borggrefe
- First Department of Medicine, Faculty of Medicine, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site, Heidelberg-Mannheim, Mannheim, Germany
| | - Holger Thiele
- Department of Internal Medicine/Cardiology, Heart Center Leipzig - University Hospital, Leipzig, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | - Hugo A Katus
- Department of Cardiology, Heidelberg University Hospital, Heidelberg, Germany
| | - John D Horowitz
- Department of Cardiology, Basil Hetzel Institute, Queen Elizabeth Hospital, University of Adelaide, Adelaide, Australia
| | - Carlo Di Mario
- Structural Interventional Cardiology, Careggi University Hospital, Florence, Italy
| | - Thomas Münzel
- Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Filippo Crea
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Jeroen J Bax
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Thomas F Lüscher
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Zurich, Switzerland.,Royal Brompton and Harefield Hospitals Trust and Imperial College, London, UK
| | - Frank Ruschitzka
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Jelena R Ghadri
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
| | - Christian Templin
- Department of Cardiology, University Heart Center, University Hospital of Zurich, Raemistrasse 100, Zurich, 8091, Switzerland
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8
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Lassola S, Miori S, Sanna A, Cucino A, Magnoni S, Umbrello M. Central venous pressure swing outperforms diaphragm ultrasound as a measure of inspiratory effort during pressure support ventilation in COVID-19 patients. J Clin Monit Comput 2021; 36:461-471. [PMID: 33635495 PMCID: PMC7908005 DOI: 10.1007/s10877-021-00674-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 02/12/2021] [Indexed: 12/19/2022]
Abstract
Purpose The COVID-19-related shortage of ICU beds magnified the need of tools to properly titrate the ventilator assistance. We investigated whether bedside-available indices such as the ultrasonographic changes in diaphragm thickening ratio (TR) and the tidal swing in central venous pressure (ΔCVP) are reliable estimates of inspiratory effort, assessed as the tidal swing in esophageal pressure (ΔPes). Methods Prospective, observational clinical investigation in the intensive care unit of a tertiary care Hospital. Fourteen critically-ill patients were enrolled (age 64 ± 7 years, BMI 29 ± 4 kg/m2), after 6 [3; 9] days from onset of assisted ventilation. A three-level pressure support trial was performed, at 10 (PS10), 5 (PS5) and 0 cmH2O (PS0). In each step, the esophageal and central venous pressure tidal swing were recorded, as well as diaphragm ultrasound. Results The reduction of pressure support was associated with an increased respiratory rate and a reduced tidal volume, while minute ventilation was unchanged. ΔPes significantly increased with reducing support (5 [3; 8] vs. 8 [14; 13] vs. 12 [6; 16] cmH2O, p < 0.0001), as did the diaphragm TR (9.2 ± 6.1 vs. 17.6 ± 7.2 vs. 28.0 ± 10.0%, p < 0.0001) and the ΔCVP (4 [3; 7] vs. 8 [5; 9] vs. 10 [7; 11] cmH2O, p < 0.0001). ΔCVP was significantly associated with ΔPes (R2 = 0.810, p < 0.001), as was diaphragm TR, albeit with a lower coefficient of determination (R2 = 0.399, p < 0.001). Conclusions In patients with COVID-19-associated respiratory failure undergoing assisted mechanical ventilation, ΔCVP is a better estimate of inspiratory effort than diaphragm ultrasound. Supplementary Information The online version contains
supplementary material available at 10.1007/s10877-021-00674-4.
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Affiliation(s)
- Sergio Lassola
- SC Anestesia e Rianimazione 1, Ospedale Santa Chiara, Trento, Italy
| | - Sara Miori
- SC Anestesia e Rianimazione 1, Ospedale Santa Chiara, Trento, Italy
| | - Andrea Sanna
- SC Anestesia e Rianimazione 1, Ospedale Santa Chiara, Trento, Italy
| | - Alberto Cucino
- SC Anestesia e Rianimazione 1, Ospedale Santa Chiara, Trento, Italy
| | - Sandra Magnoni
- SC Anestesia e Rianimazione 1, Ospedale Santa Chiara, Trento, Italy
| | - Michele Umbrello
- SC Anestesia e Rianimazione II, Ospedale San Carlo Borromeo, ASST Santi Paolo e Carlo, Milano, Italy.
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9
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Colombo J, Spinelli E, Grasselli G, Pesenti AM, Protti A. Detection of strong inspiratory efforts from the analysis of central venous pressure swings: a preliminary clinical study. Minerva Anestesiol 2020; 86:1296-1304. [PMID: 32755084 DOI: 10.23736/s0375-9393.20.14323-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Swings of central venous pressure (ΔCVP) may reflect those of pleural and esophageal (ΔPES) pressure and, therefore, the strength of inspiration. Strong inspiratory efforts can produce some harm. Herein we preliminarily assessed the diagnostic accuracy of ΔCVP for strong inspiratory efforts in critically-ill subjects breathing spontaneously. METHODS We measured ΔCVP and ΔPES in 48 critically-ill subjects breathing spontaneously with zero end-expiratory pressure (ZEEP) or 10 cmH<inf>2</inf>O of continuous positive airway pressure (CPAP). The overall diagnostic accuracy of ΔCVP for strong inspiratory efforts (arbitrarily defined as ΔPES >8 mmHg) was described as the area under the receiver operating characteristic (ROC) curve, with 0.50 indicating random guess. The agreement between ΔCVP and ΔPES was assessed with the Bland-Altman analysis. RESULTS ΔCVP recognized strong inspiratory efforts with an area under the ROC curve of 0.95 (95% confidence intervals, 0.85-0.99) with ZEEP and 0.89 (0.76-0.96) with CPAP, both significantly larger than 0.50 (P<0.001). With the best cut-off value around 8 mmHg, the diagnostic accuracy of ΔCVP was 0.92 (0.80-0.98) with ZEEP and 0.94 (0.83-0.99) with CPAP. With ZEEP, the median difference between ΔCVP and ΔPES (bias) was -0.2 mmHg, and the 95% limits of agreement (LoA) were -3.9 and +5.5 mmHg. With CPAP, bias was -0.1 mmHg, and 95%-LoA were -5.8 and +4.5 mmHg. In both cases, ΔCVP correlated with ΔPES (r<inf>s</inf> 0.81 and 0.67; P<0.001 for both). CONCLUSIONS In critically-ill subjects breathing spontaneously, ΔCVP recognized strong inspiratory efforts with acceptable accuracy. Even so, it sometimes largely differed from ∆PES.
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Affiliation(s)
- Jacopo Colombo
- Department of CardioThoracoVascular Anesthesia and Intensive Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Antonio M Pesenti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Alessandro Protti
- Department of Anesthesia and Intensive Care Unit, Humanitas Clinical and Research Center - IRCCS, Rozzano, Milan, Italy -
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10
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Dianti J, Bertoni M, Goligher EC. Monitoring patient-ventilator interaction by an end-expiratory occlusion maneuver. Intensive Care Med 2020; 46:2338-2341. [PMID: 32623476 PMCID: PMC7334114 DOI: 10.1007/s00134-020-06167-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/24/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Jose Dianti
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
| | - Michele Bertoni
- Department of Anesthesia, Critical Care and Emergency, Spedali Civili University Hospital, Brescia, Italy
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada.
- Toronto General Hospital Research Institute, 585 University Ave., 11-PMB Room 192, Toronto, ON, M5G 2N2, Canada.
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11
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Roesthuis LH, van der Hoeven JG, van Hees HWH, Schellekens WJM, Doorduin J, Heunks LMA. Recruitment pattern of the diaphragm and extradiaphragmatic inspiratory muscles in response to different levels of pressure support. Ann Intensive Care 2020; 10:67. [PMID: 32472272 PMCID: PMC7256918 DOI: 10.1186/s13613-020-00684-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 05/16/2020] [Indexed: 01/16/2023] Open
Abstract
Background Inappropriate ventilator assist plays an important role in the development of diaphragm dysfunction. Ventilator under-assist may lead to muscle injury, while over-assist may result in muscle atrophy. This provides a good rationale to monitor respiratory drive in ventilated patients. Respiratory drive can be monitored by a nasogastric catheter, either with esophageal balloon to determine muscular pressure (gold standard) or with electrodes to measure electrical activity of the diaphragm. A disadvantage is that both techniques are invasive. Therefore, it is interesting to investigate the role of surrogate markers for respiratory dive, such as extradiaphragmatic inspiratory muscle activity. The aim of the current study was to investigate the effect of different inspiratory support levels on the recruitment pattern of extradiaphragmatic inspiratory muscles with respect to the diaphragm and to evaluate agreement between activity of extradiaphragmatic inspiratory muscles and the diaphragm. Methods Activity from the alae nasi, genioglossus, scalene, sternocleidomastoid and parasternal intercostals was recorded using surface electrodes. Electrical activity of the diaphragm was measured using a multi-electrode nasogastric catheter. Pressure support (PS) levels were reduced from 15 to 3 cmH2O every 5 min with steps of 3 cmH2O. The magnitude and timing of respiratory muscle activity were assessed. Results We included 17 ventilated patients. Diaphragm and extradiaphragmatic inspiratory muscle activity increased in response to lower PS levels (36 ± 6% increase for the diaphragm, 30 ± 6% parasternal intercostals, 41 ± 6% scalene, 40 ± 8% sternocleidomastoid, 43 ± 6% alae nasi and 30 ± 6% genioglossus). Changes in diaphragm activity correlated best with changes in alae nasi activity (r2 = 0.49; P < 0.001), while there was no correlation between diaphragm and sternocleidomastoid activity. The agreement between diaphragm and extradiaphragmatic inspiratory muscle activity was low due to a high individual variability. Onset of alae nasi activity preceded the onset of all other muscles. Conclusions Extradiaphragmatic inspiratory muscle activity increases in response to lower inspiratory support levels. However, there is a poor correlation and agreement with the change in diaphragm activity, limiting the use of surface electromyography (EMG) recordings of extradiaphragmatic inspiratory muscles as a surrogate for electrical activity of the diaphragm.
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Affiliation(s)
- L H Roesthuis
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J G van der Hoeven
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - H W H van Hees
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - J Doorduin
- Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L M A Heunks
- Department of Intensive Care Medicine, Amsterdam UMC, Location VUmc, Postbox 7057, 1007 MB, Amsterdam, The Netherlands.
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12
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Umbrello M, Formenti P, Lusardi AC, Guanziroli M, Caccioppola A, Coppola S, Chiumello D. Oesophageal pressure and respiratory muscle ultrasonographic measurements indicate inspiratory effort during pressure support ventilation. Br J Anaesth 2020; 125:e148-e157. [PMID: 32386831 DOI: 10.1016/j.bja.2020.02.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/03/2020] [Accepted: 02/25/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Bedside measures of patient effort are essential to properly titrate the level of pressure support ventilation. We investigated whether the tidal swing in oesophageal (ΔPes) and transdiaphragmatic pressure (ΔPdi), and ultrasonographic changes in diaphragm (TFdi) and parasternal intercostal (TFic) thickening are reliable estimates of respiratory effort. The effect of diaphragm dysfunction was also considered. METHODS Twenty-one critically ill patients were enrolled: age 73 (14) yr, BMI 27 (7) kg m-2, and Pao2/Fio2 33.3 (9.2) kPa. A three-level pressure support trial was performed: baseline, 25% (PS-medium), and 50% reduction (PS-low). We recorded the oesophageal and transdiaphragmatic pressure-time products (PTPs), work of breathing (WOB), and diaphragm and intercostal ultrasonography. Diaphragm dysfunction was defined by the Gilbert index. RESULTS Pressure support was 9.0 (1.6) cm H2O at baseline, 6.7 (1.3) (PS-medium), and 4.4 (1.0) (PS-low). ΔPes was significantly associated with the oesophageal PTP (R2=0.868; P<0.001) and the WOB (R2=0.683; P<0.001). ΔPdi was significantly associated with the transdiaphragmatic PTP (R2=0.820; P<0.001). TFdi was only weakly correlated with the oesophageal PTP (R2=0.326; P<0.001), and the correlation improved after excluding patients with diaphragm dysfunction (R2=0.887; P<0.001). TFdi was higher and TFic lower in patients without diaphragm dysfunction: 33.6 (18.2)% vs 13.2 (9.2)% and 2.1 (1.7)% vs 12.7 (9.1)%; P<0.0001. CONCLUSIONS ΔPes and ΔPdi are adequate estimates of inspiratory effort. Diaphragm ultrasonography is a reliable indicator of inspiratory effort in the absence of diaphragm dysfunction. Additional measurement of parasternal intercostal thickening may discriminate a low inspiratory effort or a high effort in the presence of a dysfunctional diaphragm.
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Affiliation(s)
- Michele Umbrello
- SC Anestesia e Rianimazione, Ospedale San Paolo-Polo Universitario, ASST Santi Paolo e Carlo, Milan, Italy
| | - Paolo Formenti
- SC Anestesia e Rianimazione, Ospedale San Paolo-Polo Universitario, ASST Santi Paolo e Carlo, Milan, Italy
| | - Andrea C Lusardi
- Dipartimento di Scienze Della Salute, Università Degli Studi di Milano, Milan, Italy
| | | | - Alessio Caccioppola
- Dipartimento di Scienze Della Salute, Università Degli Studi di Milano, Milan, Italy
| | - Silvia Coppola
- SC Anestesia e Rianimazione, Ospedale San Paolo-Polo Universitario, ASST Santi Paolo e Carlo, Milan, Italy
| | - Davide Chiumello
- SC Anestesia e Rianimazione, Ospedale San Paolo-Polo Universitario, ASST Santi Paolo e Carlo, Milan, Italy; Dipartimento di Scienze Della Salute, Università Degli Studi di Milano, Milan, Italy; Centro Ricerca Coordinata di Insufficienza Respiratoria, Università Degli Studi di Milano, Milan, Italy.
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13
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Cappellini I, Picciafuochi F, Bartolucci M, Matteini S, Virgili G, Adembri C. Evaluation of diaphragm thickening by diaphragm ultrasonography: a reproducibility and a repeatability study. J Ultrasound 2020; 24:411-416. [PMID: 32358646 DOI: 10.1007/s40477-020-00462-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 04/08/2020] [Indexed: 12/22/2022] Open
Abstract
PURPOSE We have focused on the two-dimensional (B-mode) and the time-motion (M-mode) analysis of the zone of apposition to determine the reliability of diaphragm ultrasonography in the clinical environment. METHODS Ten healthy volunteers were enrolled and studied by three operators with different skills in ultrasonography. For every volunteer, each operator acquired three images of the diaphragm for each side, both in B-mode and in M-mode. Then a fourth operator calculated the thickening fraction (TF), by means of the formula TF = (TEI - TEE)/TEE (TEI is the thickness at end inspiration and TEE the thickness at end expiration). Afterwards, intraclass correlation coefficients (ICCs) were computed on TF to establish reproducibility and repeatability both in the B- and M-modes. A Coefficient of Repeatability or repeatability (CR) ≤ 0.3 was considered acceptable. RESULTS Both B-mode (CRs 0.16-0.26) and M-mode (CRs 0.10-0.15) were sufficiently repeatable to assess TF, except for the less experienced operator (CRs B-Mode 0.20-0.32). Reproducibility was moderate to good between operators with CRs much narrower for the M-Mode (0.13-0.14). CONCLUSIONS The results of our study have shown that diaphragm ultrasound is repeatable and reproducible when carried out by a radiologist or an intensivist with a basic curriculum in ultrasonography. The method is more accurate when using the M-mode for less experienced operators, and in this case, repeatability and reproducibility are not sufficient to make clinical decisions. No TF value lower than 36% was obtained using both techniques. This suggests the existence of a cut-off value that could be used as an initial tool to discriminate healthy subjects from those affected by diaphragmatic dysfunction. CLINICAL TRIAL REGISTRATION EUDRACT 2015-004635-12.
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Affiliation(s)
- Iacopo Cappellini
- Department of Health Sciences, Section of Anesthesiology and Critical Care, University of Florence, Florence, Italy.
| | - Fabio Picciafuochi
- Radiology Department, Azienda Ospedaliero Universitaria Careggi, Florence, Italy
| | - Maurizio Bartolucci
- Radiology Department, Azienda Ospedaliero Universitaria Careggi, Florence, Italy
| | - Simona Matteini
- Department of Health Sciences, Section of Anesthesiology and Critical Care, University of Florence, Florence, Italy
| | - Gianni Virgili
- Department of Health Sciences, Section of Anesthesiology and Critical Care, University of Florence, Florence, Italy
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Chiara Adembri
- Department of Health Sciences, Section of Anesthesiology and Critical Care, University of Florence, Florence, Italy
- Radiology Department, Azienda Ospedaliero Universitaria Careggi, Florence, Italy
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14
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Coppadoro A, Grassi A, Giovannoni C, Rabboni F, Eronia N, Bronco A, Foti G, Fumagalli R, Bellani G. Occurrence of pendelluft under pressure support ventilation in patients who failed a spontaneous breathing trial: an observational study. Ann Intensive Care 2020; 10:39. [PMID: 32266600 PMCID: PMC7138895 DOI: 10.1186/s13613-020-00654-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 03/23/2020] [Indexed: 11/23/2022] Open
Abstract
Background Pendelluft, the movement of gas within different lung regions, is present in animal models of assisted mechanical ventilation and associated with lung overstretching. Due to rebreathing of CO2 as compared to fresh gas, pendelluft might reduce ventilatory efficiency possibly exacerbating patient’s respiratory workload during weaning. Our aim was to measure pendelluft by electrical impedance tomography (EIT) in patients who failed a spontaneous breathing trial (SBT). Methods This is an observational study conducted in a general intensive care unit of a tertiary-level teaching hospital. EIT signal was recorded in 20 patients while pressure support (PS) ventilation was progressively reduced from clinical level (baseline) to 2 cmH2O, as in an SBT; four ventral-to-dorsal lung regions of interest were identified for pendelluft measurement. A regional gas movement (> 6 mL) occurring in a direction opposite to the global EIT signal was considered diagnostic for high pendelluft. Results Eight patients out of 20 (40%) were classified as high-pendelluft; baseline clinical characteristics did not differ between high- and low-pendelluft patients. At PS reduction, pendelluft and EtCO2 increased more in the high-pendelluft group (p < .001 and .011, respectively). The volume of gas subject to pendelluft moved almost completely from the ventral towards the dorsal lung regions, while the opposite movement was minimal (16.3 [10:32.8] vs. 0 [0:1.8] mL, p = .001). In a subgroup of patients, increased pendelluft volumes positively correlated with markers of respiratory distress such as increased respiratory rate, p0.1, and EtCO2. Conclusions Occult pendelluft can be measured by EIT, and is frequently present in patients failing an SBT. When present, pendelluft increases with the reduction of ventilator support and is associated with increased EtCO2, suggesting a reduction of the ability to eliminate CO2.
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Affiliation(s)
- Andrea Coppadoro
- Department of Anesthesia and Intensive Care, San Gerardo Hospital, Monza, Italy
| | - Alice Grassi
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Cecilia Giovannoni
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Francesca Rabboni
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Nilde Eronia
- Department of Anesthesia and Intensive Care, San Gerardo Hospital, Monza, Italy
| | - Alfio Bronco
- Department of Anesthesia and Intensive Care, San Gerardo Hospital, Monza, Italy
| | - Giuseppe Foti
- Department of Anesthesia and Intensive Care, San Gerardo Hospital, Monza, Italy.,School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Roberto Fumagalli
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Giacomo Bellani
- Department of Anesthesia and Intensive Care, San Gerardo Hospital, Monza, Italy. .,School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy.
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15
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Barrett NA, Hart N, Camporota L. Assessment of Work of Breathing in Patients with Acute Exacerbations of Chronic Obstructive Pulmonary Disease. COPD 2019; 16:418-428. [PMID: 31694406 DOI: 10.1080/15412555.2019.1681390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The assessment of the work of breathing (WOB) of patients with acute exacerbations of chronic obstructive pulmonary disease (COPD) is difficult, particularly when the patient first presents with acute hypercapnia and respiratory acidosis. Acute exacerbations of COPD patients are in significant respiratory distress and noninvasive measurements of WOB are easier for the patient to tolerate. Given the interest in using alternative therapies to noninvasive ventilation, such as high flow nasal oxygen therapy or extracorporeal carbon dioxide removal, understanding the physiological changes are key and this includes assessment of WOB. This narrative review considers the role of three different methods of assessing WOB in patients with acute exacerbations of COPD. Esophageal pressure is a very well validated measure of WOB, however the ability of patients with acute exacerbations of COPD to tolerate esophageal tubes is poor. Noninvasive alternative measurements include parasternal electromyography (EMG) and electrical impedance tomography (EIT). EMG is easily applied and is a well validated measure of neural drive but is more likely to be degraded by the electrical environment in intensive care or high dependency. EIT is less well validated as a tool for WOB in COPD but extremely well tolerated by patients. Each of the different methods assess WOB in a different way and have different advantages and disadvantages. For research into therapies treating acute exacerbations of COPD, combinations of EIT, EMG and esophageal pressure are likely to be better than only one of these.
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Affiliation(s)
- N A Barrett
- Centre for Human & Applied Physiological Sciences (CHAPS), School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom.,Department of Critical Care, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - N Hart
- Lane Fox Respiratory Unit, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - L Camporota
- Centre for Human & Applied Physiological Sciences (CHAPS), School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom.,Department of Critical Care, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
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16
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Sæverud HA, Falk RS, Dowrick A, Eriksen M, Aarrestad S, Skjønsberg OH. Measuring diaphragm movement and respiratory frequency using a novel ultrasound device in healthy volunteers. J Ultrasound 2019; 24:15-22. [PMID: 31691921 DOI: 10.1007/s40477-019-00412-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/25/2019] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To evaluate the ability of a novel ultrasound (US) device, DiaMon, to monitor diaphragm movement via its proxy liver movement, and compare it with the respired flow measured with a flowmeter, in awake and healthy volunteers. We wanted to (1) establish the optimal anatomical position for attaching the DiaMon device to the abdominal wall, and (2) evaluate the accuracy of continuous monitoring of respiratory frequency. METHODS Thirty healthy subjects were recruited. The DiaMon probe was applied subcostally in four different positions with the subjects in five different postures. The subjects breathed tidal volumes into a spirometer for 30-60 s with the DiaMon recording simultaneously. RESULTS The device detected a readable signal in 83-100% of the position/posture-combinations. The technical correlation between the two signals was highest in the anterior axillary-supine position (mean ± SD: 0.95 ± 0.03), followed by paramidline-supine (0.90 ± 0.09) and midclavicular-supine (0.89 ± 0.12). The frequency measurements yielded a mean difference of 0.03 (95% limits of agreement - 0.11, 0.16) breaths per minute in the anterior axillary-supine position. CONCLUSION The DiaMon device is able to detect liver movement in most subjects, and it measures breathing frequency accurately.
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Affiliation(s)
| | - Ragnhild Sørum Falk
- Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
| | | | | | - Sigurd Aarrestad
- Department of Pulmonary Medicine, Oslo University Hospital, Kirkeveien 166, 0450, Oslo, Norway
- Norwegian National Advisory Unit on Long Term Mechanical Ventilation, Haukeland University Hospital, Bergen, Norway
| | - Ole Henning Skjønsberg
- Department of Pulmonary Medicine, Oslo University Hospital, Kirkeveien 166, 0450, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
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17
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Teggia Droghi M, De Santis Santiago RR, Pinciroli R, Marrazzo F, Bittner EA, Amato MBP, Kacmarek RM, Berra L. High Positive End-Expiratory Pressure Allows Extubation of an Obese Patient. Am J Respir Crit Care Med 2019; 198:524-525. [PMID: 29702003 DOI: 10.1164/rccm.201712-2411im] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
| | | | - Riccardo Pinciroli
- 2 School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy; and
| | | | | | - Marcelo B P Amato
- 3 Hospital das Clínicas da Faculdade de Medicina da USP (HCFMUSP), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brasil
| | - Robert M Kacmarek
- 4 Respiratory Care Department, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Lorenzo Berra
- 1 Department of Anesthesia, Critical Care and Pain Medicine and
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18
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Barrett NA, Kostakou E, Hart N, Douiri A, Camporota L. Extracorporeal carbon dioxide removal for acute hypercapnic exacerbations of chronic obstructive pulmonary disease: study protocol for a randomised controlled trial. Trials 2019; 20:465. [PMID: 31362776 PMCID: PMC6664508 DOI: 10.1186/s13063-019-3548-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 06/29/2019] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a common cause of chronic respiratory failure and its course is punctuated by a series of acute exacerbations which commonly lead to hospital admission. Exacerbations are managed through the application of non-invasive ventilation and, when this fails, tracheal intubation and mechanical ventilation. The need for mechanical ventilation significantly increases the risk of death. An alternative therapy, extracorporeal carbon dioxide removal (ECCO2R), has been shown to be efficacious in removing carbon dioxide from the blood; however, its impact on respiratory physiology and patient outcomes has not been explored. METHODS/DESIGN A randomised controlled open label trial of patients (12 in each arm) with acute exacerbations of COPD at risk of failing conventional therapy (NIV) randomised to either remaining on NIV or having ECCO2R added to NIV with a primary endpoint of time to cessation of NIV. The change in respiratory physiology following the application of ECCO2R and/or NIV will be measured using electrical impedance tomography, oesophageal pressure and parasternal electromyography. Additional outcomes, including patient tolerance, outcomes, need for readmission, changes in blood gases and biochemistry and procedural complications, will be measured. Physiological changes will be compared within one patient over time and between the two groups. Healthcare costs in the UK system will also be compared between the two groups. DISCUSSION COPD is a common disease and exacerbations are a leading cause of hospital admission in the UK and worldwide, with a sizeable mortality. The management of patients with COPD consumes significant hospital and financial resources. This study seeks to understand the feasibility of a novel approach to the management of patients with acute exacerbations of COPD as well as to understand the underlying physiological changes to explain why the approach does or does not assist this patient cohort. Detailed respiratory physiology has not been previously undertaken using this technique and there are no other randomised controlled trials currently in the literature. TRIAL REGISTRATION ClinicalTrials.gov, NCT02086084.
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Affiliation(s)
- Nicholas A. Barrett
- Department of Critical Care, Guy’s and St Thomas’ NHS Foundation Trust, Westminster Bridge Rd, London, SE1 7EH UK
- Centre for Human & Applied Physiological Sciences (CHAPS), School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King’s College London, London, UK
| | - Eirini Kostakou
- Department of Critical Care, Guy’s and St Thomas’ NHS Foundation Trust, Westminster Bridge Rd, London, SE1 7EH UK
| | - Nicholas Hart
- Centre for Human & Applied Physiological Sciences (CHAPS), School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King’s College London, London, UK
- Lane Fox Respiratory Unit, Guy’s and St Thomas’ NHS Foundation Trust, Westminster Bridge Rd, London, SE1 7EH UK
| | - Abdel Douiri
- School of Population Health & Environmental Sciences, King’s College London, London, WC2R 2LS UK
- National Institute for Health Research Biomedical Research Centre, Guy’s and St Thomas’ NHS Trust and King’s College London, London, UK
| | - Luigi Camporota
- Department of Critical Care, Guy’s and St Thomas’ NHS Foundation Trust, Westminster Bridge Rd, London, SE1 7EH UK
- Centre for Human & Applied Physiological Sciences (CHAPS), School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King’s College London, London, UK
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19
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Measuring Work of Breathing, Moving From Research to the Bedside? Pediatr Crit Care Med 2019; 20:688-689. [PMID: 31274801 DOI: 10.1097/pcc.0000000000001989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Ruiz Ferrón F, Serrano Simón J. La monitorización convencional no es suficiente para valorar el esfuerzo respiratorio durante la ventilación asistida. Med Intensiva 2019; 43:197-206. [DOI: 10.1016/j.medin.2018.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 01/25/2018] [Accepted: 02/14/2018] [Indexed: 12/28/2022]
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21
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A flow-leak correction algorithm for pneumotachographic work-of-breathing measurement during high-flow nasal cannula oxygen therapy. Med Eng Phys 2018; 54:32-43. [PMID: 29487038 DOI: 10.1016/j.medengphy.2018.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 12/07/2017] [Accepted: 02/11/2018] [Indexed: 11/22/2022]
Abstract
Measuring work of breathing (WOB) is an intricate task during high-flow nasal cannula (HFNC) therapy because the continuous unidirectional flow toward the patient makes pneumotachography technically difficult to use. We implemented a new method for measuring WOB based on a differential pneumotachography (DP) system, equipped with one pneumotachograph inserted in the HFNC circuit and another connected to a monitoring facemask, combined with a leak correction algorithm (LCA) that corrects flow measurement errors arising from leakage around the monitoring facemask. To test this system, we used a mechanical lung model that provided data to compare LCA-corrected respiratory flow, volume and time values with effective values obtained with a third pneumotachograph used instead of the LCA to measure mask flow leaks directly. Effective and corrected volume and time data showed high agreement (Bland-Altman plots) even at the highest leak. Studies on two healthy adult volunteers confirmed that corrected respiratory flow combined with esophageal pressure measurements can accurately determine WOB (relative error < 1%). We conclude that during HFNC therapy, a DP system combined with a facemask and an algorithm that corrects errors due to flow leakages allows pneumotachography to measure reliably the respiratory flow and volume data needed for calculating WOB.
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22
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Abstract
The main goals of assessing respiratory system mechanical function are to evaluate the lung function through a variety of methods and to detect early signs of abnormalities that could affect the patient's outcomes. In ventilated patients, it has become increasingly important to recognize whether respiratory function has improved or deteriorated, whether the ventilator settings match the patient's demand, and whether the selection of ventilator parameters follows a lung-protective strategy. Ventilator graphics, esophageal pressure, intra-abdominal pressure, and electric impedance tomography are some of the best-known monitoring tools to obtain measurements and adequately evaluate the respiratory system mechanical function.
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23
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Norisue Y, Ashworth L, Naito T, Kataoka J, Takeuchi M, Usami S, Takada J, Fujitani S. Impact of physician education and availability of parameters regarding esophageal pressure and transpulmonary pressure on clinical decisions involving ventilator management. J Crit Care 2017; 41:112-118. [PMID: 28514715 DOI: 10.1016/j.jcrc.2017.04.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 04/09/2017] [Accepted: 04/13/2017] [Indexed: 11/16/2022]
Abstract
PURPOSE This study investigated the effects of physician education and the availability of Peso and PL data on physicians' decisions regarding ventilator management during specific simulated clinical conditions. MATERIALS AND METHODS The study was a prospective, before-after study using a case scenario-based questionnaire and a case simulator device comprising an Avea ventilator and an artificial lung and esophagus, which was connected to a Series 1101 Electronic Breathing Simulator. The 99 physicians participating in the study were provided with five simulated cases with on-time ventilator graphics without Peso and PL and completed a questionnaire on decisions they would make regarding ventilator management of the cases. Then, after receiving instruction on Peso and PL, they were given the same cases along with ventilator graphics that included Peso and PL. RESULTS After receiving instruction and data on Peso and PL, statistically significant numbers of physicians changed their answers regarding ventilator management decisions in all five cases. CONCLUSIONS Providing education and data for Peso and PL had a significant effect on physician decisions regarding ventilator management in simulated cases. The use of case scenario-based education with simulator devices for physicians may hasten worldwide understanding and clinical application of Peso and PL.
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Affiliation(s)
- Yasuhiro Norisue
- Department of Pulmonary and Critical Care Medicine, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan.
| | - Lonny Ashworth
- Department of Respiratory Care, Boise State University, Boise, ID, USA
| | - Takaki Naito
- Department of Pulmonary and Critical Care Medicine, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - Jun Kataoka
- Department of Pulmonary and Critical Care Medicine, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - Muneyuki Takeuchi
- Department of Anesthesia and Critical Care Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
| | - Sunao Usami
- Department of Pulmonary and Critical Care Medicine, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - Junko Takada
- Department of Pulmonary and Critical Care Medicine, Tokyo Bay Urayasu Ichikawa Medical Center, Chiba, Japan
| | - Shigeki Fujitani
- Department of Emergency and Critical Care Medicine, St. Marianna University Hospital, Kanagawa, Japan
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24
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Abstract
Mechanical ventilation supports gas exchange and alleviates the work of breathing when the respiratory muscles are overwhelmed by an acute pulmonary or systemic insult. Although mechanical ventilation is not generally considered a treatment for acute respiratory failure per se, ventilator management warrants close attention because inappropriate ventilation can result in injury to the lungs or respiratory muscles and worsen morbidity and mortality. Key clinical challenges include averting intubation in patients with respiratory failure with non-invasive techniques for respiratory support; delivering lung-protective ventilation to prevent ventilator-induced lung injury; maintaining adequate gas exchange in severely hypoxaemic patients; avoiding the development of ventilator-induced diaphragm dysfunction; and diagnosing and treating the many pathophysiological mechanisms that impair liberation from mechanical ventilation. Personalisation of mechanical ventilation based on individual physiological characteristics and responses to therapy can further improve outcomes.
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Affiliation(s)
- Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada; Department of Physiology, University of Toronto, Toronto, ON, Canada; Department of Medicine, Division of Respirology, University Health Network and Mount Sinai Hospital, Toronto, ON, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada; Department of Physiology, University of Toronto, Toronto, ON, Canada; Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, ON, Canada; Department of Medicine, Division of Respirology, University Health Network and Mount Sinai Hospital, Toronto, ON, Canada
| | - Laurent J Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada; Li Ka Shing Knowledge Institute, Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, ON, Canada.
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25
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Bellani G, Grasselli G, Teggia-Droghi M, Mauri T, Coppadoro A, Brochard L, Pesenti A. Do spontaneous and mechanical breathing have similar effects on average transpulmonary and alveolar pressure? A clinical crossover study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2016; 20:142. [PMID: 27160458 PMCID: PMC4862136 DOI: 10.1186/s13054-016-1290-9] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 04/08/2016] [Indexed: 01/27/2023]
Abstract
Background Preservation of spontaneous breathing (SB) is sometimes debated because it has potentially both negative and positive effects on lung injury in comparison with fully controlled mechanical ventilation (CMV). We wanted (1) to verify in mechanically ventilated patients if the change in transpulmonary pressure was similar between pressure support ventilation (PSV) and CMV for a similar tidal volume, (2) to estimate the influence of SB on alveolar pressure (Palv), and (3) to determine whether a reliable plateau pressure could be measured during pressure support ventilation (PSV). Methods We studied ten patients equipped with esophageal catheters undergoing three levels of PSV followed by a phase of CMV. For each condition, we calculated the maximal and mean transpulmonary (ΔPL) swings and Palv. Results Overall, ΔPL was similar between CMV and PSV, but only loosely correlated. The differences in ΔPL between CMV and PSV were explained largely by different inspiratory flows, indicating that the resistive pressure drop caused this difference. By contrast, the Palv profile was very different between CMV and SB; SB led to progressively more negative Palv during inspiration, and Palv became lower than the set positive end-expiratory pressure in nine of ten patients at low PSV. Finally, inspiratory occlusion holds performed during PSV led to plateau and Δ PL pressures comparable with those measured during CMV. Conclusions Under similar conditions of flow and volume, transpulmonary pressure change is similar between CMV and PSV. SB during mechanical ventilation can cause remarkably negative swings in Palv, a mechanism by which SB might potentially induce lung injury. Electronic supplementary material The online version of this article (doi:10.1186/s13054-016-1290-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Giacomo Bellani
- Department of Health Science, University of Milan-Bicocca, Via Cadore, 48 20900, Monza, Italy. .,Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy.
| | - Giacomo Grasselli
- Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy.,Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Maddalena Teggia-Droghi
- Department of Health Science, University of Milan-Bicocca, Via Cadore, 48 20900, Monza, Italy.,Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Andrea Coppadoro
- Department of Emergency and Intensive Care, A. Manzoni Hospital, Lecco, Italy
| | - Laurent Brochard
- Keenan Research Centre, St. Michael's Hospital, Toronto, ON, Canada.,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Antonio Pesenti
- Department of Health Science, University of Milan-Bicocca, Via Cadore, 48 20900, Monza, Italy.,Department of Emergency and Intensive Care, San Gerardo Hospital, Monza, Italy.,Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
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26
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Patthum A, Peters M, Lockwood C. Effectiveness and safety of Neurally Adjusted Ventilatory Assist (NAVA) mechanical ventilation compared to standard conventional mechanical ventilation in optimizing patient-ventilator synchrony in critically ill patients: a systematic review protocol. ACTA ACUST UNITED AC 2015; 13:31-46. [PMID: 26447047 DOI: 10.11124/jbisrir-2015-1914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 09/12/2014] [Accepted: 09/18/2014] [Indexed: 10/31/2022]
Affiliation(s)
- Arisara Patthum
- Faculty of Health Sciences, Joanna Briggs Institute, University of Adelaide, South Australia.,Lyell McEwin Hospital, Adelaide, South Australia
| | - Micah Peters
- Faculty of Health Sciences, Joanna Briggs Institute, University of Adelaide, South Australia
| | - Craig Lockwood
- Faculty of Health Sciences, Joanna Briggs Institute, University of Adelaide, South Australia
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