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Schaaf K, Mullin CM, Cunningham KW, Eaton J, Conrad SA. The ReInvigorate Study-phrenic nerve-to-diaphragm stimulation for weaning from mechanical ventilation: a protocol for a randomized pivotal clinical trial. Trials 2024; 25:519. [PMID: 39095923 PMCID: PMC11295437 DOI: 10.1186/s13063-024-08355-8] [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: 02/03/2024] [Accepted: 07/24/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND In the United States in 2017, there were an estimated 903,745 hospitalizations involving mechanical ventilation (MV). Complications from ventilation can result in longer hospital stays, increased risk of disability, and increased healthcare costs. It has been hypothesized that electrically pacing the diaphragm by phrenic nerve stimulation during mechanical ventilation may minimize or reverse diaphragm dysfunction, resulting in faster weaning. METHODS The ReInvigorate Trial is a prospective, multicenter, randomized, controlled clinical trial evaluating the safety and efficacy of Stimdia's pdSTIM System for facilitating weaning from MV. The pdSTIM system employs percutaneously placed multipolar electrodes to stimulate the cervical phrenic nerves and activate contraction of the diaphragm bilaterally. Patients who were on mechanical ventilation for at least 96 h and who failed at least one weaning attempt were considered for enrollment in the study. The primary efficacy endpoint was the time to successful liberation from mechanical ventilation (treatment vs. control). Secondary endpoints will include the rapid shallow breathing index and other physiological and system characteristics. Safety will be summarized for both primary and additional analyses. All endpoints will be evaluated at 30 days or at the time of removal of mechanical ventilation, whichever is first. DISCUSSION This pivotal study is being conducted under an investigational device exception with the U.S. Food and Drug Administration. The technology being studied could provide a first-of-kind therapy for difficult-to-wean patients on mechanical ventilation in an intensive care unit setting. TRIAL REGISTRATION Clinicaltrials.gov, NCT05998018 , registered August 2023.
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Affiliation(s)
- Katie Schaaf
- Stimdia Medical, Inc, 1355 Mendota Heights Road, Suite 300, Mendota Heights, MN, 55120, USA
| | | | | | - Jonathan Eaton
- Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71103, USA
| | - Steven A Conrad
- Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA, 71103, USA.
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Deininger MM, Ziles D, Borleis A, Seemann T, Erlenkoetter F, Bleilevens C, Lohse A, Benner CF, Leonhardt S, Walter M, Breuer T. Breath-by-breath comparison of a novel percutaneous phrenic nerve stimulation approach with mechanical ventilation in juvenile pigs: a pilot study. Sci Rep 2024; 14:10252. [PMID: 38704459 PMCID: PMC11069575 DOI: 10.1038/s41598-024-61103-5] [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: 12/22/2023] [Accepted: 05/02/2024] [Indexed: 05/06/2024] Open
Abstract
About one in three critically ill patients requires mechanical ventilation (MV). Prolonged MV, however, results in diaphragmatic weakness, which itself is associated with delayed weaning and increased mortality. Inducing active diaphragmatic contraction via electrical phrenic nerve stimulation (PNS) not only provides the potential to reduce diaphragmatic muscular atrophy but also generates physiological-like ventilation and therefore offers a promising alternative to MV. Reasons why PNS is not yet used in critical care medicine are high procedural invasiveness, insufficient evidence, and lack of side-by-side comparison to MV. This study aims to establish a minimal-invasive percutaneous, bilateral electrode placement approach for sole PNS breathing and thereby enable, for the first time, a breath-by-breath comparison to MV. Six juvenile German Landrace pigs received general anesthesia and orotracheal intubation. Following the novel ultrasound-guided, landmark-based, 4-step approach, two echogenic needles per phrenic nerve were successfully placed. Stimulation effectiveness was evaluated measuring tidal volume, diaphragmatic thickening and tomographic electrical impedance in a breath-by-breath comparison to MV. Following sufficient bilateral phrenic nerve stimulation in all pigs, PNS breaths showed a 2.2-fold increase in diaphragmatic thickening. It induced tidal volumes in the lung-protective range by negative pressure inspiration and improved dorso-caudal regional ventilation in contrast to MV. Our study demonstrated the feasibility of a novel ultrasound-guided, percutaneous phrenic nerve stimulation approach, which generated sufficient tidal volumes and showed more resemblance to physiological breathing than MV in a breath-by-breath comparison.
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Affiliation(s)
- Matthias Manfred Deininger
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany.
| | - Dmitrij Ziles
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Annegret Borleis
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Teresa Seemann
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Fabian Erlenkoetter
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Christian Bleilevens
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Arnhold Lohse
- Chair for Medical Information Technology, Faculty of Electrical Engineering and Information Technology, RWTH Aachen University, Aachen, Germany
| | - Carl-Friedrich Benner
- Chair for Medical Information Technology, Faculty of Electrical Engineering and Information Technology, RWTH Aachen University, Aachen, Germany
| | - Steffen Leonhardt
- Chair for Medical Information Technology, Faculty of Electrical Engineering and Information Technology, RWTH Aachen University, Aachen, Germany
| | - Marian Walter
- Chair for Medical Information Technology, Faculty of Electrical Engineering and Information Technology, RWTH Aachen University, Aachen, Germany
| | - Thomas Breuer
- Department of Intensive and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
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Le Stang V, Latronico N, Dres M, Bertoni M. Critical illness-associated limb and diaphragmatic weakness. Curr Opin Crit Care 2024; 30:121-130. [PMID: 38441088 PMCID: PMC10919276 DOI: 10.1097/mcc.0000000000001135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
PURPOSE OF REVIEW In the current review, we aim to highlight the evolving evidence on the diagnosis, prevention and treatment of critical illness weakness (CIW) and critical illness associated diaphragmatic weakness (CIDW). RECENT FINDINGS In the ICU, several risk factors can lead to CIW and CIDW. Recent evidence suggests that they have different pathophysiological mechanisms and impact on outcomes, although they share common risk factors and may overlap in several patients. Their diagnosis is challenging, because CIW diagnosis is primarily clinical and, therefore, difficult to obtain in the ICU population, and CIDW diagnosis is complex and not easily performed at the bedside. All of these issues lead to underdiagnosis of CIW and CIDW, which significantly increases the risk of complications and the impact on both short and long term outcomes. Moreover, recent studies have explored promising diagnostic techniques that are may be easily implemented in daily clinical practice. In addition, this review summarizes the latest research aimed at improving how to prevent and treat CIW and CIDW. SUMMARY This review aims to clarify some uncertain aspects and provide helpful information on developing monitoring techniques and therapeutic interventions for managing CIW and CIDW.
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Affiliation(s)
- Valentine Le Stang
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique
- AP-HP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive –Réanimation (Département ‘R3S’), Paris, France
| | - Nicola Latronico
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia
- Department of Emergency, ASST Spedali Civili University Hospital, Piazzale Ospedali Civili, 1, 25123 Brescia, Italy
- ‘Alessandra BONO’ Interdepartmental University Research Center on LOng Term Outcome (LOTO) in Critical Illness Survivors, University of Brescia, Brescia, Italy
| | - Martin Dres
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique
- AP-HP. Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive –Réanimation (Département ‘R3S’), Paris, France
| | - Michele Bertoni
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia
- Department of Emergency, ASST Spedali Civili University Hospital, Piazzale Ospedali Civili, 1, 25123 Brescia, Italy
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Moury PH, Béhouche A, Bailly S, Durand Z, Dessertaine G, Pollet A, Jaber S, Verges S, Albaladejo P. Diaphragm thickness modifications and associated factors during VA-ECMO for a cardiogenic shock: a cohort study. Ann Intensive Care 2024; 14:38. [PMID: 38457010 PMCID: PMC10923772 DOI: 10.1186/s13613-024-01264-8] [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: 09/23/2023] [Accepted: 02/16/2024] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND The incidence, causes and impact of diaphragm thickness evolution in veno-arterial extracorporeal membrane oxygenation (VA-ECMO) for cardiogenic shock are unknown. Our study investigates its evolution during the first week of VA-ECMO and its relationship with sweep gas flow settings. METHODS We conducted a prospective monocentric observational study in a 12-bed ICU in France, enrolling patients on the day of the VA-ECMO implantation. The diaphragm thickness and the diaphragm thickening fraction (as index of contractile activity, dTF; dTF < 20% defined a low contractile activity) were daily measured for one week using ultrasound. Factors associated with diaphragm thickness evolution (categorized as increased, stable, or atrophic based on > 10% modification from baseline to the last measurement), early extubation role (< day4), and patients outcome at 60 days were investigated. Changes in diaphragm thickness, the primary endpoint, was analysed using a mixed-effect linear model (MLM). RESULTS Of the 29 included patients, seven (23%) presented diaphragm atrophy, 18 remained stable (60%) and 4 exhibited an increase (17%). None of the 13 early-extubated patients experienced diaphragm atrophy, while 7 (46%) presented a decrease when extubated later (p-value = 0.008). Diaphragm thickness changes were not associated with the dTF (p-value = 0.13) but with sweep gas flow (Beta = - 3; Confidence Interval at 95% (CI) [- 4.8; - 1.2]. p-value = 0.001) and pH (Beta = - 2; CI [- 2.9; - 1]. p-value < 0.001) in MLM. The dTF remained low (< 20%) in 20 patients (69%) at the study's end and was associated with sweep gas flow evolution in MLM (Beta = - 2.8; 95% CI [- 5.2; - 0.5], p-value = 0.017). Odds ratio of death at 60 days in case of diaphragm atrophy by day 7 was 8.50 ([1.4-74], p = 0.029). CONCLUSION In our study, diaphragm thickness evolution was frequent and not associated with the diaphragm thickening fraction. Diaphragm was preserved from atrophy in case of early extubation with ongoing VA-ECMO assistance. Metabolic disorders resulting from organ failures and sweep gas flow were linked with diaphragm thickness evolution. Preserved diaphragm thickness in VA-ECMO survivors emphasizes the importance of diaphragm-protective strategies, including meticulous sweep gas flow titration.
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Affiliation(s)
- Pierre-Henri Moury
- Pôle Anesthésie-Réanimation, Grenoble Alpes University, Grenoble, France.
- Univ. Grenoble Alpes, Inserm, Grenoble Alpes University Hospital, HP2 Laboratory, Grenoble, France.
| | - Alexandre Béhouche
- Pôle Anesthésie-Réanimation, Grenoble Alpes University, Grenoble, France
| | - Sébastien Bailly
- Univ. Grenoble Alpes, Inserm, Grenoble Alpes University Hospital, HP2 Laboratory, Grenoble, France
| | - Zoé Durand
- Pôle Anesthésie-Réanimation, Grenoble Alpes University, Grenoble, France
| | | | - Angelina Pollet
- Pôle Anesthésie-Réanimation, Grenoble Alpes University, Grenoble, France
| | - Samir Jaber
- Intensive Care Unit, Anaesthesiology and Critical Care Department B, Saint Eloi Teaching Hospital, Université Montpellier 1, Centre Hospitalier Universitaire Montpellier, Montpellier, France
| | - Samuel Verges
- Univ. Grenoble Alpes, Inserm, Grenoble Alpes University Hospital, HP2 Laboratory, Grenoble, France
| | - Pierre Albaladejo
- Pôle Anesthésie-Réanimation, Grenoble Alpes University, Grenoble, France
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Wu H, Chasteen B. Rapid review of ventilator-induced diaphragm dysfunction. Respir Med 2024; 223:107541. [PMID: 38290603 DOI: 10.1016/j.rmed.2024.107541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/01/2024]
Abstract
Ventilator-induced diaphragm dysfunction is gaining increased recognition. Evidence of diaphragm weakness can manifest within 12 h to a few days after the initiation of mechanical ventilation. Various noninvasive and invasive methods have been developed to assess diaphragm function. The implementation of diaphragm-protective ventilation strategies is crucial for preventing diaphragm injuries. Furthermore, diaphragm neurostimulation emerges as a promising and novel treatment option. In this rapid review, our objective is to discuss the current understanding of ventilator-induced diaphragm dysfunction, diagnostic approaches, and updates on strategies for prevention and management.
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Affiliation(s)
- Huimin Wu
- Pulmonary, Critical Care and Sleep Medicine Section, Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, United States; Department of Adult Respiratory Care, University of Oklahoma Medical Center, Oklahoma City, OK, 73104, United States.
| | - Bobby Chasteen
- Department of Adult Respiratory Care, University of Oklahoma Medical Center, Oklahoma City, OK, 73104, United States.
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Keogh C, Saavedra F, Dubo S, Aqueveque P, Ortega P, Gomez B, Germany E, Pinto D, Osorio R, Pastene F, Poulton A, Jarvis J, Andrews B, FitzGerald JJ. Closed-loop parameter optimization for patient-specific phrenic nerve stimulation. Artif Organs 2024; 48:274-284. [PMID: 37246826 DOI: 10.1111/aor.14593] [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: 02/17/2023] [Revised: 05/02/2023] [Accepted: 05/25/2023] [Indexed: 05/30/2023]
Abstract
BACKGROUND Ventilator-induced diaphragm dysfunction occurs rapidly following the onset of mechanical ventilation and has significant clinical consequences. Phrenic nerve stimulation has shown promise in maintaining diaphragm function by inducing diaphragm contractions. Non-invasive stimulation is an attractive option as it minimizes the procedural risks associated with invasive approaches. However, this method is limited by sensitivity to electrode position and inter-individual variability in stimulation thresholds. This makes clinical application challenging due to potentially time-consuming calibration processes to achieve reliable stimulation. METHODS We applied non-invasive electrical stimulation to the phrenic nerve in the neck in healthy volunteers. A closed-loop system recorded the respiratory flow produced by stimulation and automatically adjusted the electrode position and stimulation amplitude based on the respiratory response. By iterating over electrodes, the optimal electrode was selected. A binary search method over stimulation amplitudes was then employed to determine an individualized stimulation threshold. Pulse trains above this threshold were delivered to produce diaphragm contraction. RESULTS Nine healthy volunteers were recruited. Mean threshold stimulation amplitude was 36.17 ± 14.34 mA (range 19.38-59.06 mA). The threshold amplitude for reliable nerve capture was moderately correlated with BMI (Pearson's r = 0.66, p = 0.049). Repeating threshold measurements within subjects demonstrated low intra-subject variability of 2.15 ± 1.61 mA between maximum and minimum thresholds on repeated trials. Bilateral stimulation with individually optimized parameters generated reliable diaphragm contraction, resulting in significant inhaled volumes following stimulation. CONCLUSION We demonstrate the feasibility of a system for automatic optimization of electrode position and stimulation parameters using a closed-loop system. This opens the possibility of easily deployable individualized stimulation in the intensive care setting to reduce ventilator-induced diaphragm dysfunction.
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Affiliation(s)
- Conor Keogh
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Francisco Saavedra
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Sebastian Dubo
- Department of Physiotherapy, Universidad de Concepcion, Concepcion, Chile
| | - Pablo Aqueveque
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Paulina Ortega
- Department of Physiotherapy, Universidad de Concepcion, Concepcion, Chile
| | - Britam Gomez
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Enrique Germany
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Daniela Pinto
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Rodrigo Osorio
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Francisco Pastene
- Department of Electrical Engineering, Universidad de Concepcion, Concepcion, Chile
| | - Adrian Poulton
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Jonathan Jarvis
- School of Sports and Exercise Science, Liverpool John Moores University, Liverpool, UK
| | - Brian Andrews
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - James J FitzGerald
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
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Parfait M, Rohrs E, Joussellin V, Mayaux J, Decavèle M, Reynolds S, Similowski T, Demoule A, Dres M. An Initial Investigation of Diaphragm Neurostimulation in Patients with Acute Respiratory Distress Syndrome. Anesthesiology 2024; 140:483-494. [PMID: 38088791 DOI: 10.1097/aln.0000000000004873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
BACKGROUND Lung protective ventilation aims at limiting lung stress and strain. By reducing the amount of pressure transmitted by the ventilator into the lungs, diaphragm neurostimulation offers a promising approach to minimize ventilator-induced lung injury. This study investigates the physiologic effects of diaphragm neurostimulation in acute respiratory distress syndrome (ARDS) patients. The hypothesis was that diaphragm neurostimulation would improve oxygenation, would limit the distending pressures of the lungs, and would improve cardiac output. METHODS Patients with moderate ARDS were included after 48 h of invasive mechanical ventilation and had a left subclavian catheter placed to deliver bilateral transvenous phrenic nerve stimulation. Two 60-min volume-controlled mechanical ventilation (control) sessions were interspersed by two 60-min diaphragm neurostimulation sessions delivered continually, in synchrony with the ventilator. Gas exchange, lung mechanics, chest electrical impedance tomography, and cardiac index were continuously monitored and compared across four sessions. The primary endpoint was the Pao2/fraction of inspired oxygen (Fio2) ratio at the end of each session, and the secondary endpoints were lung mechanics and hemodynamics. RESULTS Thirteen patients were enrolled but the catheter could not be inserted in one, leaving 12 patients for analysis. All sessions were conducted without interruption and well tolerated. The Pao2/Fio2 ratio did not change during the four sessions. Median (interquartile range) plateau pressure was 23 (20 to 31) cm H2O and 21 (17 to 25) cm H2O, driving pressure was 14 (12 to 18) cm H2O and 11 (10 to 13) cm H2O, and end-inspiratory transpulmonary pressure was 9 (5 to 11) cm H2O and 7 (4 to 11) cm H2O during mechanical ventilation alone and during mechanical ventilation + neurostimulation session, respectively. The dorsal/ventral ventilation surface ratio was 0.70 (0.54 to 0.91) when on mechanical ventilation and 1.20 (0.76 to 1.33) during the mechanical ventilation + neurostimulation session. The cardiac index was 2.7 (2.3 to 3.5) l · min-1 · m-2 on mechanical ventilation and 3.0 (2.4 to 3.9) l · min-1 · m-2 on mechanical ventilation + neurostimulation. CONCLUSIONS This proof-of-concept study showed the feasibility of short-term diaphragm neurostimulation in conjunction with mechanical ventilation in ARDS patients. Diaphragm neurostimulation was associated with positive effects on lung mechanics and on hemodynamics. EDITOR’S PERSPECTIVE
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Affiliation(s)
- Mélodie Parfait
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive - Réanimation (Département "R3S"), Paris, France
| | - Elizabeth Rohrs
- Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Vincent Joussellin
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France
| | - Julien Mayaux
- Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive - Réanimation (Département "R3S"), Paris, France
| | - Maxens Decavèle
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive - Réanimation (Département "R3S"), Paris, France
| | - Steven Reynolds
- Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Thomas Similowski
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Département "R3S," Paris, France
| | - Alexandre Demoule
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive - Réanimation (Département "R3S"), Paris, France
| | - Martin Dres
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; Assistance Publique-Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive - Réanimation (Département "R3S"), Paris, France
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Panelli A, Grimm AM, Krause S, Verfuß MA, Ulm B, Grunow JJ, Bartels HG, Carbon NM, Niederhauser T, Weber-Carstens S, Brochard L, Schaller SJ. Noninvasive Electromagnetic Phrenic Nerve Stimulation in Critically Ill Patients: A Feasibility Study. Chest 2024:S0012-3692(24)00271-X. [PMID: 38403186 DOI: 10.1016/j.chest.2024.02.035] [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: 09/25/2023] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024] Open
Abstract
BACKGROUND Electromagnetic stimulation of the phrenic nerve induces diaphragm contractions, but no coils for clinical use have been available. We recently demonstrated the feasibility of ventilation using bilateral transcutaneous noninvasive electromagnetic phrenic nerve stimulation (NEPNS) before surgery in lung-healthy patients with healthy weight in a dose-dependent manner. RESEARCH QUESTION Is NEPNS feasible in critically ill patients in an ICU setting? STUDY DESIGN AND METHODS This feasibility nonrandomized controlled study aimed to enroll patients within 36 h of intubation who were expected to remain ventilated for ≥ 72 h. The intervention group received 15-min bilateral transcutaneous NEPNS bid, whereas the control group received standard care. If sufficient, NEPNS was used without pressure support to ventilate the patient; pressure support was added if necessary to ventilate the patient adequately. The primary outcome was feasibility, measured as time to find the optimal stimulation position. Further end points were sessions performed according to the protocol or allowing a next-day catch-up session and tidal volume achieved with stimulation reaching only 3 to 6 mL/kg ideal body weight (IBW). A secondary end point was expiratory diaphragm thickness measured with ultrasound from days 1 to 10 (or extubation). RESULTS The revised European Union regulation mandated reapproval of medical devices, prematurely halting the study. Eleven patients (five in the intervention group, six in the control group) were enrolled. The median time to find an adequate stimulation position was 23 s (interquartile range, 12-62 s). The intervention bid was executed in 87% of patients, and 92% of patients including a next-day catch-up session. Ventilation with 3 to 6 mL/kg IBW was achieved in 732 of 1,701 stimulations (43.0%) with stimulation only and in 2,511 of 4,036 stimulations (62.2%) with additional pressure support. A decrease in diaphragm thickness was prevented by bilateral NEPNS (P = .034) until day 10. INTERPRETATION Bilateral transcutaneous NEPNS was feasible in the ICU setting with the potential benefit of preventing diaphragm atrophy during mechanical ventilation. NEPNS ventilation effectiveness needs further assessment. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT05238753; URL: www. CLINICALTRIALS gov.
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Affiliation(s)
- Alessandro Panelli
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Aline M Grimm
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Sven Krause
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Biel/Bienne, Switzerland
| | - Michael A Verfuß
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Bernhard Ulm
- Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Department of Anesthesiology and Intensive Care, Munich, Germany; Department of Anaesthesiology and Intensive Care Medicine, School of Medicine, University of Ulm, Ulm, Germany
| | - Julius J Grunow
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Hermann G Bartels
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Niklas M Carbon
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany; Department of Anesthesiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Uniklinikum Erlangen, Erlangen, Germany
| | - Thomas Niederhauser
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Biel/Bienne, Switzerland
| | - Steffen Weber-Carstens
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Laurent Brochard
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada; Interdepartmental Division of Critical Care, University of Toronto, Toronto, ON, Canada
| | - Stefan J Schaller
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany; Technical University of Munich, School of Medicine, Klinikum rechts der Isar, Department of Anesthesiology and Intensive Care, Munich, Germany.
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Laghi F. Clarifying the Role of Diaphragm Ultrasound Imaging in the Discontinuation of Mechanical Ventilation. Anesthesiology 2024; 140:4-7. [PMID: 38085158 DOI: 10.1097/aln.0000000000004810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Affiliation(s)
- Franco Laghi
- Division of Pulmonary and Critical Care Medicine, Hines Veterans Affairs Hospital, Hines, Illinois; Division of Pulmonary and Critical Care Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois
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10
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Panelli A, Verfuß MA, Dres M, Brochard L, Schaller SJ. Phrenic nerve stimulation to prevent diaphragmatic dysfunction and ventilator-induced lung injury. Intensive Care Med Exp 2023; 11:94. [PMID: 38109016 PMCID: PMC10728426 DOI: 10.1186/s40635-023-00577-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 12/06/2023] [Indexed: 12/19/2023] Open
Abstract
Side effects of mechanical ventilation, such as ventilator-induced diaphragmatic dysfunction (VIDD) and ventilator-induced lung injury (VILI), occur frequently in critically ill patients. Phrenic nerve stimulation (PNS) has been a valuable tool for diagnosing VIDD by assessing respiratory muscle strength in response to magnetic PNS. The detection of pathophysiologically reduced respiratory muscle strength is correlated with weaning failure, longer mechanical ventilation time, and mortality. Non-invasive electromagnetic PNS designed for diagnostic use is a reference technique that allows clinicians to measure transdiaphragm pressure as a surrogate parameter for diaphragm strength and functionality. This helps to identify diaphragm-related issues that may impact weaning readiness and respiratory support requirements, although lack of lung volume measurement poses a challenge to interpretation. In recent years, therapeutic PNS has been demonstrated as feasible and safe in lung-healthy and critically ill patients. Effects on critically ill patients' VIDD or diaphragm atrophy outcomes are the subject of ongoing research. The currently investigated application forms are diverse and vary from invasive to non-invasive and from electrical to (electro)magnetic PNS, with most data available for electrical stimulation. Increased inspiratory muscle strength and improved diaphragm activity (e.g., excursion, thickening fraction, and thickness) indicate the potential of the technique for beneficial effects on clinical outcomes as it has been successfully used in spinal cord injured patients. Concerning the potential for electrophrenic respiration, the data obtained with non-invasive electromagnetic PNS suggest that the induced diaphragmatic contractions result in airway pressure swings and tidal volumes remaining within the thresholds of lung-protective mechanical ventilation. PNS holds significant promise as a therapeutic intervention in the critical care setting, with potential applications for ameliorating VIDD and the ability for diaphragm training in a safe lung-protective spectrum, thereby possibly reducing the risk of VILI indirectly. Outcomes of such diaphragm training have not been sufficiently explored to date but offer the perspective for enhanced patient care and reducing weaning failure. Future research might focus on using PNS in combination with invasive and non-invasive assisted ventilation with automatic synchronisation and the modulation of PNS with spontaneous breathing efforts. Explorative approaches may investigate the feasibility of long-term electrophrenic ventilation as an alternative to positive pressure-based ventilation.
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Affiliation(s)
- Alessandro Panelli
- Charité - Universitätsmedizin Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Michael A Verfuß
- Charité - Universitätsmedizin Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany
| | - Martin Dres
- Sorbonne Université, INSERM UMRS 1158, Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Service de Médecine Intensive et Réanimation, Département R3S, APHP, Sorbonne Université, Hôpital Pitie Salpêtrière, Paris, France
| | - Laurent Brochard
- Unity Health Toronto, Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Toronto, ON, Canada
- Interdepartmental Division of Critical Care, University of Toronto, Toronto, Canada
| | - Stefan J Schaller
- Charité - Universitätsmedizin Berlin, Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Berlin, Germany.
- Technical University of Munich, School of Medicine and Health, Klinikum Rechts der Isar, Department of Anesthesiology and Intensive Care Medicine, Munich, Germany.
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11
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Panelli A, Grunow JJ, VERFUß MA, Bartels HG, Brass Z, Schaller SJ. Outcomes in critically ill patients after diaphragmatic stimulation on ventilator-induced diaphragmatic dysfunction: a systematic review. Eur J Phys Rehabil Med 2023; 59:772-781. [PMID: 38214045 PMCID: PMC10794987 DOI: 10.23736/s1973-9087.23.08031-0] [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: 05/10/2023] [Revised: 07/11/2023] [Accepted: 10/09/2023] [Indexed: 01/13/2024]
Abstract
INTRODUCTION Mechanical ventilation (MV) is a lifesaving procedure for critically ill patients. Diaphragm activation and stimulation may counteract side effects, such as ventilator-induced diaphragm dysfunction (VIDD). The effects of stimulation on diaphragm atrophy and patient outcomes are reported in this systematic review. EVIDENCE ACQUISITION Studies investigating diaphragmatic stimulation versus standard of care in critically ill patients and evaluating clinical outcomes were extracted from a Medline database last on January 23, 2023, after registration in Prospero (CRD42021259353). Selected studies included the investigation of diaphragmatic stimulation versus standard of care in critically ill patients, an evaluation of the clinical outcomes. These included muscle atrophy, VIDD, weaning failure, mortality, quality of life, ventilation time, diaphragmatic function, length of stay in the Intensive Care Unit (ICU), and length of hospital stay. All articles were independently evaluated by two reviewers according to their abstract and title and, secondly, a full texts evaluation by two independent reviewers was performed. To resolve diverging evaluations, a third reviewer was consulted to reach a final decision. Data were extracted by the reviewers following the Oxford 2011 levels of evidence guidelines and summarized accordingly. EVIDENCE SYNTHESIS Seven studies were extracted and descriptively synthesized, since a metanalysis was not feasible. Patients undergoing diaphragm stimulation had moderate evidence of higher maximal inspiratory pressure (MIP), less atrophy, less mitochondrial respiratory dysfunction, less oxidative stress, less molecular atrophy, shorter MV time, shorter ICU length of stay, longer survival, and better SF-36 scores than control. CONCLUSIONS Evidence of the molecular and histological benefits of diaphragmatic stimulation is limited. The results indicate positive clinical effects of diaphragm activation with a moderate level of evidence for MIP and a low level of evidence for other outcomes. Diaphragm activation could be a therapeutic solution to avoid diaphragm atrophy, accelerate weaning, shorten MV time, and counteract VIDD; however, better-powered studies are needed to increase the level of evidence.
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Affiliation(s)
- Alessandro Panelli
- Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin, Berlin, Germany
| | - Julius J Grunow
- Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin, Berlin, Germany
| | - Michael A VERFUß
- Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin, Berlin, Germany
| | - Hermann G Bartels
- Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin, Berlin, Germany
| | - Zarina Brass
- School of Medicine, University of Nottingham, Nottingham, UK
| | - Stefan J Schaller
- Department of Anesthesiology and Intensive Care Medicine (CCM/CVK), Charité - Universitätsmedizin, Berlin, Germany -
- School of Medicine, Department of Anesthesiology and Intensive Care, Klinikum rechts der Isar Hospital, School of Medicine and Health, Technical University of Munich, Munich, Germany
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12
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Morris IS, Bassi T, Oosthuysen C, Goligher EC. Phrenic Nerve Stimulation for Acute Respiratory Failure. Respir Care 2023; 68:1736-1747. [PMID: 37875317 PMCID: PMC10676252 DOI: 10.4187/respcare.11439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Diaphragm inactivity during invasive mechanical ventilation leads to diaphragm atrophy and weakness, hemodynamic instability, and ventilatory heterogeneity. Absent respiratory drive and effort can, therefore, worsen injury to both lung and diaphragm and is a major cause of failure to wean. Phrenic nerve stimulation (PNS) can maintain controlled levels of diaphragm activity independent of intrinsic drive and as such may offer a promising approach to achieving lung and diaphragm protective ventilatory targets. Whereas PNS has an established role in the management of chronic respiratory failure, there is emerging interest in how its multisystem putative benefits may be temporarily harnessed in the management of invasively ventilated patients with acute respiratory failure.
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Affiliation(s)
- Idunn S Morris
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada; Department of Physiology, University of Toronto, Toronto, Canada; and Department of Intensive Care Medicine, Nepean Hospital, Sydney, Australia
| | - Thiago Bassi
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada; and Lungpacer Medical, Exton, Pennsylvania
| | - Charissa Oosthuysen
- 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; Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada; Department of Physiology, University of Toronto, Toronto, Canada; and Toronto General Hospital Research Institute, Toronto, Canada.
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13
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Spiesshoefer J, Dreher M. On-Demand Diaphragm Pacing in Invasively Mechanically Ventilated Patients with Severe Hypoxemia in the ICU: New Hope in Acute Respiratory Distress Syndrome? Am J Respir Crit Care Med 2023; 208:952-955. [PMID: 37713291 PMCID: PMC10870858 DOI: 10.1164/rccm.202309-1596ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 09/14/2023] [Indexed: 09/17/2023] Open
Affiliation(s)
- Jens Spiesshoefer
- Department of Pneumology and Intensive Care Medicine RWTH Aachen University Hospital Aachen, Germany
- Health Science Interdisciplinary Center Scuola Superiore Sant'Anna Pisa, Italy
| | - Michael Dreher
- Department of Pneumology and Intensive Care Medicine RWTH Aachen University Hospital Aachen, Germany
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14
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Bonny V, Joffre J, Gabarre P, Urbina T, Missri L, Ladoire M, Gasperment M, Baudel JL, Guidet B, Dumas G, Maury E, Brochard L, Ait-Oufella H. Sonometric assessment of cough predicts extubation failure: SonoWean-a proof-of-concept study. Crit Care 2023; 27:368. [PMID: 37749612 PMCID: PMC10521471 DOI: 10.1186/s13054-023-04653-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/19/2023] [Indexed: 09/27/2023] Open
Abstract
BACKGROUND Extubation failure is associated with increased mortality. Cough ineffectiveness may be associated with extubation failure, but its quantification for patients undergoing weaning from invasive mechanical ventilation (IMV) remains challenging. METHODS Patients under IMV for more than 24 h completing a successful spontaneous T-tube breathing trial (SBT) were included. At the end of the SBT, we performed quantitative sonometric assessment of three successive coughing efforts using a sonometer. The mean of the 3-cough volume in decibels was named Sonoscore. RESULTS During a 1-year period, 106 patients were included. Median age was 65 [51-75] years, mainly men (60%). Main reasons for IMV were acute respiratory failure (43%), coma (25%) and shock (17%). Median duration of IMV at enrollment was 4 [3-7] days. Extubation failure occurred in 15 (14%) patients. Baseline characteristics were similar between success and failure extubation groups, except percentage of simple weaning which was lower and MV duration which was longer in extubation failure patients. Sonoscore was significantly lower in patients who failed extubation (58 [52-64] vs. 75 [70-78] dB, P < 0.001). After adjustment on MV duration and comorbidities, Sonoscore remained associated with extubation failure. Sonoscore was predictive of extubation failure with an area under the ROC curve of 0.91 (IC95% [0.83-0.99], P < 0.001). A threshold of Sonoscore < 67.1 dB predicted extubation failure with a sensitivity of 0.93 IC95% [0.70-0.99] and a specificity of 0.82 IC95% [0.73-0.90]. CONCLUSION Sonometric assessment of cough strength might be helpful to identify patients at risk of extubation failure in patients undergoing IMV.
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Affiliation(s)
- Vincent Bonny
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
- Sorbonne Université, Paris, France
| | - Jeremie Joffre
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
- Sorbonne Université, Paris, France
| | - Paul Gabarre
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Tomas Urbina
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Louai Missri
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
- Sorbonne Université, Paris, France
| | - Mathilde Ladoire
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Maxime Gasperment
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Jean-Luc Baudel
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Bertrand Guidet
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
- Sorbonne Université, Paris, France
| | - Guillaume Dumas
- Service de Médecine Intensive-Réanimation, CHU Grenoble-Alpes, INSERM U1042-HP2, Université Grenoble-Alpes, Grenoble, France
| | - Eric Maury
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
- Sorbonne Université, Paris, France
| | - Laurent Brochard
- Unity Health Toronto, Keenan Research Centre, Interdepartmental Division of Critical Care Medicine, Li Ka Shing Knowledge Institute, St. Michael's Hospital, University of Toronto, Toronto, ON, 508783, Canada
| | - Hafid Ait-Oufella
- Service de Médecine Intensive Réanimation, Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 Rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.
- Sorbonne Université, Paris, France.
- Inserm U970, Centre de Recherche Cardiovasculaire de Paris (PARCC), Paris, France.
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15
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Medrinal C, Machefert M, Lamia B, Bonnevie T, Gravier FE, Hilfiker R, Prieur G, Combret Y. Transcutaneous electrical diaphragmatic stimulation in mechanically ventilated patients: a randomised study. Crit Care 2023; 27:338. [PMID: 37649092 PMCID: PMC10469422 DOI: 10.1186/s13054-023-04597-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 08/01/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Few specific methods are available to reduce the risk of diaphragmatic dysfunction for patients under mechanical ventilation. The number of studies involving transcutaneous electrical stimulation of the diaphragm (TEDS) is increasing but none report results for diaphragmatic measurements, and they lack power. We hypothesised that the use of TEDS would decrease diaphragmatic dysfunction and improve respiratory muscle strength in patients in ICU. METHODS We conducted a controlled trial to assess the impact of daily active electrical stimulation versus sham stimulation on the prevention of diaphragm dysfunction during the weaning process from mechanical ventilation. The evaluation was based on ultrasound measurements of diaphragm thickening fraction during spontaneous breathing trials. We also measured maximal inspiratory muscle pressure (MIP), peak cough flow (PEF) and extubation failure. RESULTS Sixty-six patients were included and randomised using a 1:1 ratio. The mean number of days of mechanical ventilation was 10 ± 6.8. Diaphragm thickening fraction was > 30% at the SBT for 67% of participants in the TEDS group and 54% of the Sham group (OR1.55, 95% CI 0.47-5.1; p = 0.47). MIP and PEF were similar in the TEDS and Sham groups (respectively 35.5 ± 11.9 vs 29.7 ± 11.7 cmH20; p = 0.469 and 83.2 ± 39.5 vs. 75.3 ± 34.08 L/min; p = 0.83). Rate of extubation failure was not different between groups. CONCLUSION TEDS did not prevent diaphragm dysfunction or improve inspiratory muscle strength in mechanically ventilated patients. TRIAL REGISTRATION Prospectively registered on the 20th November 2019 on ClinicalTrials.gov Identifier NCT04171024.
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Affiliation(s)
- Clément Medrinal
- Université Paris-Saclay, UVSQ, Erphan, 78000, Versailles, France.
- Intensive Care Unit Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France.
| | - Margaux Machefert
- Université Paris-Saclay, UVSQ, Erphan, 78000, Versailles, France
- Physiotherapy Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
| | - Bouchra Lamia
- Normandie Univ, UNIROUEN, EA3830-GRHV, 76 000, Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), 76 000, Rouen, France
- Pulmonology Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
- Pulmonology, Respiratory Department, Rouen University Hospital, Rouen, France
| | - Tristan Bonnevie
- Normandie Univ, UNIROUEN, EA3830-GRHV, 76 000, Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), 76 000, Rouen, France
- Adir Association, 76230, Bois Guillaume, France
| | - Francis-Edouard Gravier
- Normandie Univ, UNIROUEN, EA3830-GRHV, 76 000, Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), 76 000, Rouen, France
- Adir Association, 76230, Bois Guillaume, France
| | - Roger Hilfiker
- Research and Independent Studies in Private Physiotherapy (RISE), 3902, Brig, Switzerland
| | - Guillaume Prieur
- Intensive Care Unit Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
- Pulmonology Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
| | - Yann Combret
- Université Paris-Saclay, UVSQ, Erphan, 78000, Versailles, France
- Intensive Care Unit Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
- Pulmonology Department, Le Havre Hospital, Avenue Pierre Mendes France, 76290, Montivilliers, France
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16
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Bureau C, Van Hollebeke M, Dres M. Managing respiratory muscle weakness during weaning from invasive ventilation. Eur Respir Rev 2023; 32:32/168/220205. [PMID: 37019456 PMCID: PMC10074167 DOI: 10.1183/16000617.0205-2022] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 11/08/2022] [Indexed: 04/07/2023] Open
Abstract
Weaning is a critical stage of an intensive care unit (ICU) stay, in which the respiratory muscles play a major role. Weakness of the respiratory muscles, which is associated with significant morbidity in the ICU, is not limited to atrophy and subsequent dysfunction of the diaphragm; the extradiaphragmatic inspiratory and expiratory muscles also play important parts. In addition to the well-established deleterious effect of mechanical ventilation on the respiratory muscles, other risk factors such as sepsis may be involved. Weakness of the respiratory muscles can be suspected visually in a patient with paradoxical movement of the abdominal compartment. Measurement of maximal inspiratory pressure is the simplest way to assess respiratory muscle function, but it does not specifically take the diaphragm into account. A cut-off value of -30 cmH2O could identify patients at risk for prolonged ventilatory weaning; however, ultrasound may be better for assessing respiratory muscle function in the ICU. Although diaphragm dysfunction has been associated with weaning failure, this diagnosis should not discourage clinicians from performing spontaneous breathing trials and considering extubation. Recent therapeutic developments aimed at preserving or restoring respiratory muscle function are promising.
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Affiliation(s)
- Côme Bureau
- Sorbonne Université, INSERM, UMR_S1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- AP-HP Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive et Réanimation, Département R3S, Paris, France
| | - Marine Van Hollebeke
- KU Leuven - University of Leuven, Department of Rehabilitation Sciences, Leuven, Belgium
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Martin Dres
- Sorbonne Université, INSERM, UMR_S1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- AP-HP Sorbonne Université, Hôpital Pitié-Salpêtrière, Service de Médecine Intensive et Réanimation, Département R3S, Paris, France
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17
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Wong IMJ, Ferguson ND, Urner M. Invasive mechanical ventilation. Intensive Care Med 2023; 49:669-672. [PMID: 37115258 DOI: 10.1007/s00134-023-07079-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023]
Affiliation(s)
- Irene M J Wong
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
- Departments of Medicine and Physiology, University of Toronto, Toronto, Canada.
- Division of Respirology and Critical Care Medicine, Department of Medicine, University Health Network, Toronto, Canada.
- Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada.
- Toronto General Research Institute, Toronto, Canada.
- Toronto General Hospital, 585 University Avenue, MaRS-9012, Toronto, ON, M5G 2N2, Canada.
| | - Martin Urner
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Canada
- Department of Anesthesia and Pain Management, University Health Network, Toronto, Canada
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18
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Etienne H, Morris IS, Hermans G, Heunks L, Goligher EC, Jaber S, Morelot-Panzini C, Assouad J, Gonzalez-Bermejo J, Papazian L, Similowski T, Demoule A, Dres M. Diaphragm Neurostimulation Assisted Ventilation in Critically Ill Patients. Am J Respir Crit Care Med 2023; 207:1275-1282. [PMID: 36917765 PMCID: PMC10595441 DOI: 10.1164/rccm.202212-2252cp] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/14/2023] [Indexed: 03/15/2023] Open
Abstract
Diaphragm neurostimulation consists of placing electrodes directly on or in proximity to the phrenic nerve(s) to elicit diaphragmatic contractions. Since its initial description in the 18th century, indications have shifted from cardiopulmonary resuscitation to long-term ventilatory support. Recently, the technical development of devices for temporary diaphragm neurostimulation has opened up the possibility of a new era for the management of mechanically ventilated patients. Combining positive pressure ventilation with diaphragm neurostimulation offers a potentially promising new approach to the delivery of mechanical ventilation which may benefit multiple organ systems. Maintaining diaphragm contractions during ventilation may attenuate diaphragm atrophy and accelerate weaning from mechanical ventilation. Preventing atelectasis and preserving lung volume can reduce lung stress and strain and improve homogeneity of ventilation, potentially mitigating ventilator-induced lung injury. Furthermore, restoring the thoracoabdominal pressure gradient generated by diaphragm contractions may attenuate the drop in cardiac output induced by positive pressure ventilation. Experimental evidence suggests diaphragm neurostimulation may prevent neuroinflammation associated with mechanical ventilation. This review describes the historical development and evolving approaches to diaphragm neurostimulation during mechanical ventilation and surveys the potential mechanisms of benefit. The review proposes a research agenda and offers perspectives for the future of diaphragm neurostimulation assisted mechanical ventilation for critically ill patients.
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Affiliation(s)
- Harry Etienne
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Department of Thoracic Surgery, Tenon University Hospital, Paris, France
| | - Idunn S. Morris
- Interdepartmental Division of Critical Care Medicine and
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada
- Department of Intensive Care Medicine, Nepean Hospital, Kingswood, New South Wales, Australia
| | - Greet Hermans
- Medical Intensive Care Unit, Department of General Internal Medicine, University Hospital Leuven, Leuven, Belgium
- Laboratory of Intensive Care Medicine, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Leo Heunks
- Department of Intensive Care, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Ewan C. Goligher
- Interdepartmental Division of Critical Care Medicine and
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada
- Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Samir Jaber
- Intensive Care and Anesthesiology Department, Saint Eloi Hospital, Montpellier, France
| | - Capucine Morelot-Panzini
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Service de Pneumologie
| | - Jalal Assouad
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Department of Thoracic Surgery, Tenon University Hospital, Paris, France
| | - Jésus Gonzalez-Bermejo
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Service de Soins de Suite Réadaptation
| | - Laurent Papazian
- Service de Médecine Intensive Reanimation, Centre Hospitalier de Bastia, Bastia, France
| | - Thomas Similowski
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Département R3S, and
| | - Alexandre Demoule
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Service de Médecine Intensive – Réanimation, Hopital Pitie Salpetriere, APHP, Sorbonne Universite, Paris, France; and
| | - Martin Dres
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
- Service de Médecine Intensive – Réanimation, Hopital Pitie Salpetriere, APHP, Sorbonne Universite, Paris, France; and
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19
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Mueller G, Aszalos E, Krause S, Niederhauser T, Slavei K, Baumberger ME. Safety and Feasibility of Noninvasive Electromagnetic Stimulation of the Phrenic Nerves. Respir Care 2023; 68:602-610. [PMID: 36878642 PMCID: PMC10171341 DOI: 10.4187/respcare.10568] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
BACKGROUND Mechanical ventilation is widely used in ICU patients as a lifesaving intervention. Diaphragmatic atrophy and thinning occur from lack of contractions of the diaphragm during mechanical ventilation. It may prolong weaning and increase the risk of respiratory complications. Noninvasive electromagnetic stimulation of the phrenic nerves may ameliorate the atrophy seen with ventilation. The objective of this study was to show that noninvasive repetitive electromagnetic stimulation is safe, feasible, and effective to stimulate the phrenic nerves in both awake individuals and anesthetized patients. METHODS A single-center study with 10 subjects overall, 5 awake volunteers and 5 anesthetized subjects. We used a prototype electromagnetic, noninvasive, simultaneous bilateral phrenic nerve stimulation device in both groups. In the awake volunteers, we assessed time-to-first capture of the phrenic nerves and safety measures, such as pain, discomfort, dental paresthesia, and skin irritation. In the anesthetized subjects, time-to-first capture as well as tidal volumes and airway pressures at 20%, 30%, and 40% stimulation intensity were assessed. RESULTS Diaphragmatic capture was achieved in all the subjects within a median (range) of 1 min (1 min to 9 min 21 s) for the awake subjects and 30 s (20 s to 1 min 15 s) for the anesthetized subjects. There were no adverse or severe adverse events in either group, nor any dental paresthesia, skin irritation, or subjective pain in the stimulated area. Tidal volumes increased in all the subjects in response to simultaneous bilateral phrenic nerve stimulation and increased gradually with increasing stimulation intensity. Airway pressures corresponded to spontaneous breathing of ∼2 cm H2O. CONCLUSIONS Noninvasive phrenic nerve stimulation can be safely performed in awake and anesthetized individuals. It was feasible and effective in stimulating the diaphragm by induction of physiologic and scalable tidal volumes with minimum positive airway pressures.
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Affiliation(s)
- Gabi Mueller
- Clinical Trial Unit, Swiss Paraplegic Center, Nottwil, Switzerland.
| | - Elöd Aszalos
- Anesthesiology, Swiss Paraplegic Center, Nottwil, Switzerland
| | - Sven Krause
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Biel, Switzerland
| | - Thomas Niederhauser
- Institute for Human Centered Engineering, Bern University of Applied Sciences, Biel, Switzerland
| | | | - Michael E Baumberger
- Paraplegiology and Rehabilitation, Swiss Paraplegic Center, Nottwil, Switzerland
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20
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How to optimize extubation? Intensive Care Med 2023; 49:337-340. [PMID: 36719457 DOI: 10.1007/s00134-022-06964-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/14/2022] [Indexed: 02/01/2023]
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21
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Soták M, Tyll T, Roubík K. Temporary phrenic nerve stimulated patients: What is the role of ultrasound examination? Artif Organs 2023; 47:464-469. [PMID: 36398921 DOI: 10.1111/aor.14453] [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: 07/11/2022] [Revised: 10/24/2022] [Accepted: 10/28/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Prolonged mechanical ventilation caused by ventilator-induced diaphragm dysfunction (VIDD) is a serious problem in critically ill patients. Identification of patients who will have difficulty weaning from ventilation along with attempts to reduce total time on mechanical ventilation is some of the aims of intensive care medicine. OBSERVATIONS This article briefly summarizes current options for temporary phrenic nerve stimulation therapy in an effort to keep the diaphragm active as direct prevention and treatment of ventilator-associated diaphragmatic dysfunction in patients on mechanical ventilation. The results of feasibility studies using different approaches are promising but so far, the clinical relevance is low. One important question is which tool would reliably identify early signs of diaphragmatic dysfunction and also be useful in guiding therapy. The authors present a brief overview of the current options considering the advantages and disadvantages of the available examination modalities. Despite the fact that current data point out some limitations of ultrasound examination, we believe that it still has a unique position in the bedside examination of critically ill patients on mechanical ventilation. CONCLUSION Temporary phrenic nerve stimulation, regardless of the specific approach used, has the potential to directly treat or reverse VIDD, and ultrasound examination plays an important role in the comprehensive care of critically ill patients.
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Affiliation(s)
- Michal Soták
- Military University Hospital Prague, Department of Anesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and Military University Hospital Prague, Prague, Czech Republic.,Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Tomáš Tyll
- Military University Hospital Prague, Department of Anesthesiology and Intensive Care, 1st Faculty of Medicine, Charles University and Military University Hospital Prague, Prague, Czech Republic
| | - Karel Roubík
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague, Czech Republic
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22
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Kaufmann EM, Krause S, Geisshuesler L, Scheidegger O, Haeberlin A, Niederhauser T. Feasibility of transesophageal phrenic nerve stimulation. Biomed Eng Online 2023; 22:5. [PMID: 36717872 PMCID: PMC9885573 DOI: 10.1186/s12938-023-01071-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 01/18/2023] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Every year, more than 2.5 million critically ill patients in the ICU are dependent on mechanical ventilation. The positive pressure in the lungs generated by the ventilator keeps the diaphragm passive, which can lead to a loss of myofibers within a short time. To prevent ventilator-induced diaphragmatic dysfunction (VIDD), phrenic nerve stimulation may be used. OBJECTIVE The goal of this study is to show the feasibility of transesophageal phrenic nerve stimulation (TEPNS). We hypothesize that selective phrenic nerve stimulation can efficiently activate the diaphragm with reduced co-stimulations. METHODS An in vitro study in saline solution combined with anatomical findings was performed to investigate relevant stimulation parameters such as inter-electrode spacing, range to target site, or omnidirectional vs. sectioned electrodes. Subsequently, dedicated esophageal electrodes were inserted into a pig and single stimulation pulses were delivered simultaneously with mechanical ventilation. Various stimulation sites and response parameters such as transdiaphragmatic pressure or airway flow were analyzed to establish an appropriate stimulation setting. RESULTS Phrenic nerve stimulation with esophageal electrodes has been demonstrated. With a current amplitude of 40 mA, similar response figures of the diaphragm activation as compared to conventional stimulation with needle electrodes at 10mA were observed. Directed electrodes best aligned with the phrenic nerve resulted in up to 16.9 % higher amplitude at the target site in vitro and up to 6 cmH20 higher transdiaphragmatic pressure in vivo as compared to omnidirectional electrodes. The activation efficiency was more sensitive to the stimulation level inside the esophagus than to the inter-electrode spacing. Most effective and selective stimulation was achieved at the level of rib 1 using sectioned electrodes 40 mm apart. CONCLUSION Directed transesophageal phrenic nerve stimulation with single stimuli enabled diaphragm activation. In the future, this method might keep the diaphragm active during, and even support, artificial ventilation. Meanwhile, dedicated sectioned electrodes could be integrated into gastric feeding tubes.
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Affiliation(s)
- Elisa M. Kaufmann
- grid.424060.40000 0001 0688 6779Institute of Human Centered Engineering HuCE, Bern University of Applied Sciences, Biel, Switzerland ,grid.5734.50000 0001 0726 5157Sitem Center for Translational Medicine and Biomedical Entrepreneurship, University of Bern, Bern, Switzerland
| | - Sven Krause
- grid.424060.40000 0001 0688 6779Institute of Human Centered Engineering HuCE, Bern University of Applied Sciences, Biel, Switzerland
| | - Lukas Geisshuesler
- grid.424060.40000 0001 0688 6779Institute of Human Centered Engineering HuCE, Bern University of Applied Sciences, Biel, Switzerland
| | - Olivier Scheidegger
- grid.5734.50000 0001 0726 5157Department Neurology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Andreas Haeberlin
- grid.5734.50000 0001 0726 5157Sitem Center for Translational Medicine and Biomedical Entrepreneurship, University of Bern, Bern, Switzerland ,grid.5734.50000 0001 0726 5157Department of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thomas Niederhauser
- grid.424060.40000 0001 0688 6779Institute of Human Centered Engineering HuCE, Bern University of Applied Sciences, Biel, Switzerland ,grid.5734.50000 0001 0726 5157Sitem Center for Translational Medicine and Biomedical Entrepreneurship, University of Bern, Bern, Switzerland
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23
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Dres M, de Abreu MG, Similowski T. Reply to Jha. Am J Respir Crit Care Med 2022; 206:1047-1049. [PMID: 35772169 PMCID: PMC9801999 DOI: 10.1164/rccm.202206-1181le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Martin Dres
- Experimental and Clinical Respiratory NeurophysiologySorbonne University, INSERMParis, France,Medicine Intensive Reanimation (R3S Department)AP-HP, Pitie-Salpetriere HospitalParis, France,Corresponding author (e-mail: )
| | - Marcelo Gama de Abreu
- Department of Anesthesiology and Intensive Care MedicineTechnische Universitat DresdenDresden, Germany,Department of Intensive Care and Resuscitation,Department of Outcomes ResearchCleveland ClinicCleveland, Ohio
| | - Thomas Similowski
- Experimental and Clinical Respiratory NeurophysiologySorbonne University, INSERMParis, France,Medicine Intensive Reanimation (R3S Department)AP-HP, Pitie-Salpetriere HospitalParis, France
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24
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Jha AK. Transvenous Phrenic Nerve Stimulation in Patients Who Are Difficult to Wean. Am J Respir Crit Care Med 2022; 206:1047. [PMID: 35772121 PMCID: PMC9801992 DOI: 10.1164/rccm.202206-1024le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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25
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Morris IS, Dres M, Goligher EC. Phrenic nerve stimulation to protect the diaphragm, lung, and brain during mechanical ventilation. Intensive Care Med 2022; 48:1299-1301. [PMID: 35688993 DOI: 10.1007/s00134-022-06760-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023]
Affiliation(s)
- Idunn S Morris
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
- Department of Intensive Care Medicine, Nepean Hospital, Sydney, Australia
| | - Martin Dres
- Médecine Intensive-Réanimation (Département "R3S"), APHP, Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France
- Neurophysiologie respiratoire expérimentale et clinique, INSERM UMR_S 1158, Sorbonne Université, Paris, France
| | - 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., 9-MaRS-9024, Toronto, M5G 2N2, Canada.
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26
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Keogh C, Saavedra F, Dubo S, Aqueveque P, Ortega P, Gomez B, Germany E, Pinto D, Osorio R, Pastene F, Poulton A, Jarvis J, Andrews B, FitzGerald JJ. Non-invasive phrenic nerve stimulation to avoid ventilator-induced diaphragm dysfunction in critical care. Artif Organs 2022; 46:1988-1997. [PMID: 35377472 PMCID: PMC9790411 DOI: 10.1111/aor.14244] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/09/2022] [Accepted: 03/16/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUND Diaphragm muscle atrophy during mechanical ventilation begins within 24 h and progresses rapidly with significant clinical consequences. Electrical stimulation of the phrenic nerves using invasive electrodes has shown promise in maintaining diaphragm condition by inducing intermittent diaphragm muscle contraction. However, the widespread application of these methods may be limited by their risks as well as the technical and environmental requirements of placement and care. Non-invasive stimulation would offer a valuable alternative method to maintain diaphragm health while overcoming these limitations. METHODS We applied non-invasive electrical stimulation to the phrenic nerve in the neck in healthy volunteers. Respiratory pressure and flow, diaphragm electromyography and mechanomyography, and ultrasound visualization were used to assess the diaphragmatic response to stimulation. The electrode positions and stimulation parameters were systematically varied in order to investigate the influence of these parameters on the ability to induce diaphragm contraction with non-invasive stimulation. RESULTS We demonstrate that non-invasive capture of the phrenic nerve is feasible using surface electrodes without the application of pressure, and characterize the stimulation parameters required to achieve therapeutic diaphragm contractions in healthy volunteers. We show that an optimal electrode position for phrenic nerve capture can be identified and that this position does not vary as head orientation is changed. The stimulation parameters required to produce a diaphragm response at this site are characterized and we show that burst stimulation above the activation threshold reliably produces diaphragm contractions sufficient to drive an inspired volume of over 600 ml, indicating the ability to produce significant diaphragmatic work using non-invasive stimulation. CONCLUSION This opens the possibility of non-invasive systems, requiring minimal specialist skills to set up, for maintaining diaphragm function in the intensive care setting.
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Affiliation(s)
- Conor Keogh
- Nuffield Department of Surgical SciencesUniversity of OxfordOxfordUK
| | - Francisco Saavedra
- Nuffield Department of Surgical SciencesUniversity of OxfordOxfordUK,Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Sebastian Dubo
- Kinesiology DepartmentUniversidad de ConcepcionConcepciónChile
| | - Pablo Aqueveque
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Paulina Ortega
- Kinesiology DepartmentUniversidad de ConcepcionConcepciónChile
| | - Britam Gomez
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Enrique Germany
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Daniela Pinto
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Rodrigo Osorio
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Francisco Pastene
- Electrical Engineering DepartmentUniversidad de ConcepcionConcepciónChile
| | - Adrian Poulton
- Nuffield Department of Surgical SciencesUniversity of OxfordOxfordUK
| | - Jonathan Jarvis
- School of Sport and Exercise ScienceLiverpool John Moores UniversityLiverpoolUK
| | - Brian Andrews
- Nuffield Department of Surgical SciencesUniversity of OxfordOxfordUK
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27
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Lv H, Zheng H, Liu J, Cai Q, Ren Y, Yi H, Yang Y, Hu X, Chen G. Expert consensus on liver transplantation perioperative evaluation and rehabilitation for acute-on-chronic liver failure. LIVER RESEARCH 2022. [DOI: 10.1016/j.livres.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Morris IS, Ferguson ND. Transvenous Phrenic Nerve Stimulation: A Novel Therapy Gathering Pace. Am J Respir Crit Care Med 2022; 205:1135-1136. [PMID: 35320061 PMCID: PMC9872800 DOI: 10.1164/rccm.202202-0315ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Idunn S. Morris
- Interdepartmental Division of Critical Care MedicineUniversity of TorontoToronto, Ontario, Canada,Department of Intensive Care MedicineNepean HospitalKingswood, New South Wales, Australia
| | - Niall D. Ferguson
- Interdepartmental Division of Critical Care MedicineDepartments of Medicine and Physiology,Institute for Health Policy, Management and EvaluationUniversity of TorontoToronto, Ontario, Canada,Toronto General Research InstituteToronto, Ontario, Canada,Department of MedicineUniversity Health NetworkToronto, Ontario, Canada
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29
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Inspiratory response and side-effects to rapid bilateral magnetic phrenic nerve stimulation using differently shaped coils: implications for stimulation-assisted mechanical ventilation. Respir Res 2022; 23:357. [PMID: 36528761 PMCID: PMC9758474 DOI: 10.1186/s12931-022-02251-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 11/14/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Rapid magnetic stimulation (RMS) of the phrenic nerves may serve to attenuate diaphragm atrophy during mechanical ventilation. With different coil shapes and stimulation location, inspiratory responses and side-effects may differ. This study aimed to compare the inspiratory and sensory responses of three different RMS-coils either used bilaterally on the neck or on the chest, and to determine if ventilation over 10 min can be achieved without muscle fatigue and coils overheating. METHODS Healthy participants underwent bilateral anterior 1-s RMS on the neck (RMSBAMPS) (N = 14) with three different pairs of magnetic coils (parabolic, D-shape, butterfly) at 15, 20, 25 and 30 Hz stimulator-frequency and 20% stimulator-output with + 10% increments. The D-shape coil with individual optimal stimulation settings was then used to ventilate participants (N = 11) for up to 10 min. Anterior RMS on the chest (RMSaMS) (N = 8) was conducted on an optional visit. Airflow was assessed via pneumotach and transdiaphragmatic pressure via oesophageal and gastric balloon catheters. Perception of air hunger, pain, discomfort and paresthesia were measured with a numerical scale. RESULTS Inspiration was induced via RMSBAMPS in 86% of participants with all coils and via RMSaMS in only one participant with the parabolic coil. All coils produced similar inspiratory and sensory responses during RMSBAMPS with the butterfly coil needing higher stimulator-output, which resulted in significantly larger discomfort ratings at maximal inspiratory responses. Ten of 11 participants achieved 10 min of ventilation without decreases in minute ventilation (15.7 ± 4.6 L/min). CONCLUSIONS RMSBAMPS was more effective than RMSaMS, and could temporarily ventilate humans seemingly without development of muscular fatigue. Trial registration This study was registered on clinicaltrials.gov (NCT04176744).
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30
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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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