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Bottari G, Confalone V, Creteur J, Cecchetti C, Taccone FS. The Sublingual Microcirculation in Critically Ill Children with Septic Shock Undergoing Hemoadsorption: A Pilot Study. Biomedicines 2024; 12:1435. [PMID: 39062009 PMCID: PMC11275152 DOI: 10.3390/biomedicines12071435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/16/2024] [Accepted: 06/20/2024] [Indexed: 07/28/2024] Open
Abstract
Background: The importance of perfusion-guided resuscitation in septic shock has recently emerged. We explored whether the use of hemoadsorption led to a potential beneficial role in microvascular alterations in this clinical setting. Methods: A pre-planned secondary analysis of a Phase-II interventional single-arm pilot study (NCT05658588) was carried out, where 17 consecutive septic shock children admitted into PICU were treated with continuous renal replacement therapy (CRRT) and CytoSorb. Thirteen patients were eligible to be investigated with sublingual microcirculation at baseline, 24, 48, 72 and 96 h from the onset of blood purification. Patients achieving a microvascular flow index (MFI) ≥ 2.5 and/or proportion of perfused vessels (PPV) exceeding 90% by 96 h were defined as responders. Results: In 10/13 (77%), there was a significant improvement in MFIs (p = 0.01) and PPVs% (p = 0.04) between baseline and 24 h from the end of treatment. Eight patients displayed a high heterogenicity index (HI > 0.5) during blood purification and among these, five showed an improvement by the end of treatment (HI < 0.5). Conclusions: In this pilot study, we have found a potential association between CytoSorb hemoadsorption and a microcirculation improvement in pediatric patients with septic shock, particularly when this observation has been associated with hemodynamic improvement.
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Affiliation(s)
- Gabriella Bottari
- Pediatric Intensive Care Unit, Bambino Gesuù Children’s Hospital, Scientific Institute for Research, Hospitalization, Healthcare (IRCCS), 00165 Rome, Italy; (V.C.); (C.C.)
| | - Valerio Confalone
- Pediatric Intensive Care Unit, Bambino Gesuù Children’s Hospital, Scientific Institute for Research, Hospitalization, Healthcare (IRCCS), 00165 Rome, Italy; (V.C.); (C.C.)
| | - Jacques Creteur
- Department of Intensive Care, Hopital Universitaire de Bruxelles (HUB), Université Libre de Bruxelles (ULB), 1050 Brussels, Belgium; (J.C.); (F.S.T.)
| | - Corrado Cecchetti
- Pediatric Intensive Care Unit, Bambino Gesuù Children’s Hospital, Scientific Institute for Research, Hospitalization, Healthcare (IRCCS), 00165 Rome, Italy; (V.C.); (C.C.)
| | - Fabio Silvio Taccone
- Department of Intensive Care, Hopital Universitaire de Bruxelles (HUB), Université Libre de Bruxelles (ULB), 1050 Brussels, Belgium; (J.C.); (F.S.T.)
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2
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Shao M, Zhong MC, Wang Z, Ke Z, Zhong Z, Zhou J. Non-Invasive Dynamic Reperfusion of Microvessels In Vivo Controlled by Optical Tweezers. Front Bioeng Biotechnol 2022; 10:952537. [PMID: 35910027 PMCID: PMC9331193 DOI: 10.3389/fbioe.2022.952537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Distributive shock is considered to be a condition of microvascular hypoperfusion, which can be fatal in severe cases. However, traditional therapeutic methods to restore the macro blood flow are difficult to accurately control the blood perfusion of microvessels, and the currently developed manipulation techniques are inevitably incompatible with biological systems. In our approach, infrared optical tweezers are used to dynamically control the microvascular reperfusion within subdermal capillaries in the pinna of mice. Furthermore, we estimate the effect of different optical trap positions on reperfusion at branch and investigate the effect of the laser power on reperfusion. The results demonstrate the ability of optical tweezers to control microvascular reperfusion. This strategy allows near-noninvasive reperfusion of the microvascular hypoperfusion in vivo. Hence, our work is expected to provide unprecedented insights into the treatment of distributive shock.
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Affiliation(s)
- Meng Shao
- Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei, China
| | - Min-Cheng Zhong
- Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei, China
- *Correspondence: Min-Cheng Zhong, ; Jinhua Zhou,
| | - Zixin Wang
- School of Biomedical Engineering, Anhui Medical University, Hefei, China
| | - Zeyu Ke
- School of Biomedical Engineering, Anhui Medical University, Hefei, China
| | - Zhensheng Zhong
- School of Biomedical Engineering, Anhui Medical University, Hefei, China
| | - Jinhua Zhou
- School of Biomedical Engineering, Anhui Medical University, Hefei, China
- *Correspondence: Min-Cheng Zhong, ; Jinhua Zhou,
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3
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Domizi R, Damiani E, Scorcella C, Carsetti A, Giaccaglia P, Casarotta E, Montomoli J, Gabbanelli V, Brugia M, Moretti M, Adrario E, Donati A. Mid-Regional Proadrenomedullin (MR-proADM) and Microcirculation in Monitoring Organ Dysfunction of Critical Care Patients With Infection: A Prospective Observational Pilot Study. Front Med (Lausanne) 2021; 8:680244. [PMID: 34917627 PMCID: PMC8669477 DOI: 10.3389/fmed.2021.680244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 10/25/2021] [Indexed: 01/20/2023] Open
Abstract
Introduction: Microvascular alterations are involved in the development of organ injury in critical care patients. Mid-regional proadrenomedullin (MR-proADM) may predict organ damage and its evolution. The main objective of this study was to assess the correlation between MR-proADM and microvascular flow index (MFI) in a small cohort of 20 adult critical care patients diagnosed with infection, sepsis, or septic shock. Further objectives were to evaluate the correlation between the clearance of MR-proADM and the variables of microcirculation and between MR-proADM and the Sequential Organ Failure Assessment (SOFA) score. Materials and Methods: This is a prospective observational pilot study. Inclusion criteria: consecutive adult patients admitted to intensive care unit (ICU) for or with infection-related illness. Daily measurement of MR-proADM and calculation of the SOFA score from admission in ICU to day 5. Repeated evaluations of sublingual microcirculation, collection of clinical data, and laboratory tests. Results: Primary outcome: MR-proADM was not significantly correlated to the MFI at admission in ICU. A clearance of MR-proADM of 20% or more in the first 24 h was related to the improvement of the MFIs and MFIt [percentual variation of the MFIs + 12.35 (6.01–14.59)% vs. +2.23 (−4.45–6.01)%, p = 0.005; MFIt +9.09 (4.53–16.26)% vs. −1.43 (−4.36–3.12)%, p = 0.002]. Conclusion: This study did not support a direct correlation of MR-proADM with the MFI at admission in ICU; however, it showed a good correlation between the clearance of MR-proADM, MFI, and other microvascular variables. This study also supported the prognostic value of the marker. Adequately powered studies should be performed to confirm the findings.
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Affiliation(s)
- Roberta Domizi
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy
| | - Elisa Damiani
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Claudia Scorcella
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy
| | - Andrea Carsetti
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Paolo Giaccaglia
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Erika Casarotta
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Jonathan Montomoli
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Vincenzo Gabbanelli
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy
| | - Marina Brugia
- Laboratory Medicine, Azienda Ospedaliera Universitaria Ospedali Riuniti Ancona, Ancona, Italy
| | - Marco Moretti
- Laboratory Medicine, Azienda Ospedaliera Universitaria Ospedali Riuniti Ancona, Ancona, Italy
| | - Erica Adrario
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Abele Donati
- Anesthesia and Intensive Care Unit, Azienda Ospedaliera Universitaria Ospedali Riuniti, Ancona, Italy.,Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
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Automated Algorithm Analysis of Sublingual Microcirculation in an International Multicentral Database Identifies Alterations Associated With Disease and Mechanism of Resuscitation. Crit Care Med 2021; 48:e864-e875. [PMID: 32931192 DOI: 10.1097/ccm.0000000000004491] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Reliable automated handheld vital microscopy image sequence analysis and the identification of disease states and effects of therapy are prerequisites for the routine use of quantitative sublingual microcirculation measurements at the point-of-care. The present study aimed to clinically validate the recently introduced MicroTools software in a large multicentral database of perioperative and critically ill patients and to use this automatic algorithm to data-mine and identify the sublingual microcirculatory variable changes in response to disease and therapy. DESIGN Retrospective algorithm-based image analysis and data-mining within a large international database of sublingual capillary microscopy. Algorithm-based analysis was compared with manual analysis for validation. Thereafter, MicroTools was used to identify the functional microcirculatory alterations associated with disease conditions and identify therapeutic options for recruiting functional microcirculatory variables. SETTING Ten perioperative/ICU/volunteer studies in six international teaching hospitals. PATIENTS The database encompass 267 adult and pediatric patients undergoing surgery, treatment for sepsis, and heart failure in the ICU and healthy volunteers. INTERVENTIONS Perioperative and ICU standard of care. MEASUREMENTS AND MAIN RESULTS One thousand five hundred twenty-five handheld vital microscopy image sequences containing 149,257 microscopy images were analyzed. 3.89 × 10 RBC positions were tracked by the algorithm in real time, and offline manual analysis was performed. Good correlation and trending ability were found between manual and automatic total and functional capillary density (r = 0.6-0.8; p < 0.0001). RBC tracking within the database demonstrated changes in functional capillary density and/or RBC velocity in septic shock, heart failure, hypovolemia, obstructive shock, and hemodilution and thus detected the presence of a disease condition. Therapies recruiting the microcirculatory diffusion and convection capacity associated with systemic vasodilation and an increase in cardiac output were separately identified. CONCLUSIONS Algorithm-based analysis of the sublingual microcirculation closely matched manual analysis across a broad spectrum of populations. It successfully identified a methodology to quantify microcirculatory alterations associated with disease and the success of capillary recruitment, improving point-of-care application of microcirculatory-targeted resuscitation procedures.
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5
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Roy TK, Secomb TW. Effects of impaired microvascular flow regulation on metabolism-perfusion matching and organ function. Microcirculation 2020; 28:e12673. [PMID: 33236393 DOI: 10.1111/micc.12673] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022]
Abstract
Impaired tissue oxygen delivery is a major cause of organ damage and failure in critically ill patients, which can occur even when systemic parameters, including cardiac output and arterial hemoglobin saturation, are close to normal. This review addresses oxygen transport mechanisms at the microcirculatory scale, and how hypoxia may occur in spite of adequate convective oxygen supply. The structure of the microcirculation is intrinsically heterogeneous, with wide variations in vessel diameters and flow pathway lengths, and consequently also in blood flow rates and oxygen levels. The dynamic processes of structural adaptation and flow regulation continually adjust microvessel diameters to compensate for heterogeneity, redistributing flow according to metabolic needs to ensure adequate tissue oxygenation. A key role in flow regulation is played by conducted responses, which are generated and propagated by endothelial cells and signal upstream arterioles to dilate in response to local hypoxia. Several pathophysiological conditions can impair local flow regulation, causing hypoxia and tissue damage leading to organ failure. Therapeutic measures targeted to systemic parameters may not address or may even worsen tissue oxygenation at the microvascular level. Restoration of tissue oxygenation in critically ill patients may depend on restoration of endothelial cell function, including conducted responses.
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Affiliation(s)
- Tuhin K Roy
- Department of Anesthesiology & Perioperative Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Timothy W Secomb
- Department of Physiology, University of Arizona, Tucson, AZ, 85724, USA
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6
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Automated quantification of tissue red blood cell perfusion as a new resuscitation target. Curr Opin Crit Care 2020; 26:273-280. [PMID: 32345794 DOI: 10.1097/mcc.0000000000000725] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
PURPOSE OF REVIEW Identification of insufficient tissue perfusion is fundamental to recognizing circulatory shock in critically ill patients, and the primary target to restore adequate oxygen delivery. However, the concept of tissue perfusion remains ill-defined and out-of-reach for clinicians as point-of-care resuscitation target. Even though handheld vital microscopy (HVM) provides the technical prerequisites to collect information on tissue perfusion in the sublingual microcirculation, challenges in image analysis prevent quantification of tissue perfusion and manual analysis steps prohibit point-of-care application. The present review aims to discuss recent advances in algorithm-based HVM analysis and the physiological basis of tissue perfusion-based resuscitation parameters. RECENT FINDINGS Advanced computer vision algorithm such as MicroTools independently quantify microcirculatory diffusion and convection capacity by HVM and provide direct insight into tissue perfusion, leading to our formulation a functional parameter, tissue red blood cell (RBC) perfusion (tRBCp). Its definition is discussed in terms of the physiology of oxygen transport to the tissue and its expected effect as a point-of-care resuscitation target. Further refinements to microcirculatory monitoring include multiwavelength HVM techniques and maximal recruitable microcirculatory diffusion and convection capacity. SUMMARY tRBCp as measured using algorithm-based HVM analysis with an automated software called MicroTools, represents a promising candidate to assess microcirculatory delivery of oxygen for microcirculation-based resuscitation in critically ill patients at the point-of-care.
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Holley AD, Dulhunty J, Udy A, Midwinter M, Lukin B, Stuart J, Boots R, Lassig-Smith M, Holley RB, Paratz J, Lipman J. Early Sequential Microcirculation Assessment In Shocked Patients as a Predictor of Outcome: A Prospective Observational Cohort Study. Shock 2020; 55:581-586. [PMID: 32826808 DOI: 10.1097/shk.0000000000001578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVES A dysfunctional microcirculation is universal in shock and is often dissociated from global hemodynamic parameters. Persistent microcirculatory derangements reflect ongoing tissue hypoperfusion and organ injury. The initial microcirculatory dysfunction and subsequent resolution could potentially guide therapy and predict outcomes. We evaluated the microcirculation early in a heterogenous shocked population. Microcirculatory resolution was correlated with measures of tissue perfusion and global hemodynamics. The relationship between the microcirculation over 24 h and outcome were evaluated. DESIGN We prospectively recruited patients with all forms of shock, based on global hemodynamics and evidence of organ hypoperfusion. SETTING A 30-bed adult intensive care unit (ICU). PATIENTS Eighty-two shocked patients. MEASUREMENTS AND MAIN RESULTS Following the diagnosis of shock, patients underwent a sublingual microcirculation examination using Sidestream Dark Field Imaging. The median age of patients was 66 years old (interquartile range [IQR] 54-71), with an Acute Physiology and Chronic Health Evaluation II of 27 (IQR 20-32). Microcirculatory parameters included Percentage Perfused Vessels (PPV), De Backer Score, and a heterogeneity index in patients with septic shock, according to the second consensus guidelines Additional parameters collected: temperature, heart rate and arterial pressure, cumulative fluid balance, and vasopressor use. Arterial blood samples were taken at the time of microcirculatory assessments, providing HCO3, lactate concentrations, PaO2, and PaCO2 measurements. A statistically significant improvement in PPV and the heterogeneity index was demonstrated. This improvement was mirrored by biomarkers of perfusion; however, the global hemodynamic parameter changes were not significantly different over the 24-h period. The early microcirculatory improvement was not predictive of an improvement in acute kidney injury, length of stay, ICU, or hospital mortality. CONCLUSIONS Early sequential evaluation of the microcirculation in shocked patients, demonstrated statistically significant improvement in the PPV and microvascular heterogeneity with standard care. These improvements were mirrored by biomarkers of organ perfusion; however, the changes in global hemodynamics were not as pronounced in this early phase. Early improvement in the microcirculation did not predict clinical outcome.
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Affiliation(s)
- Anthony D Holley
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia.,School of Medicine, The University of Queensland, Queensland, Australia.,The Jamieson Trauma Institute, Queensland, Australia
| | - Joel Dulhunty
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia.,School of Medicine, The University of Queensland, Queensland, Australia.,Redcliffe Hospital, Queensland, Australia.,School of Public Health and Social Work, Queensland University of Technology, Queensland, Australia
| | - Andrew Udy
- Department of Intensive Care and Hyperbaric Medicine, The Alfred, Victoria, Australia.,Australian and New Zealand Intensive Care Research Centre, Monash University, Melbourne, Australia
| | - Mark Midwinter
- School of Biomedical Sciences, University of Queensland, Queensland, Australia
| | - Bill Lukin
- Department of Emergency Medicine, Royal Brisbane and Women's Hospital, Queensland, Australia
| | - Janine Stuart
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia
| | - Robert Boots
- School of Medicine, The University of Queensland, Queensland, Australia.,Department of Thoracic Medicine. Royal Brisbane and Women's Hospital, Queensland, Australia
| | - Melissa Lassig-Smith
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia
| | - Robert B Holley
- The James Cook University, Townsville, Queensland, Australia
| | - Jenny Paratz
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia.,School of Public Health and Social Work, Queensland University of Technology, Queensland, Australia
| | - Jeffrey Lipman
- Intensive Care Services, Royal Brisbane and Women's Hospital, Queensland, Australia.,School of Medicine, The University of Queensland, Queensland, Australia.,The Jamieson Trauma Institute, Queensland, Australia
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Merz T, Denoix N, Huber-Lang M, Singer M, Radermacher P, McCook O. Microcirculation vs. Mitochondria-What to Target? Front Med (Lausanne) 2020; 7:416. [PMID: 32903633 PMCID: PMC7438707 DOI: 10.3389/fmed.2020.00416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 06/29/2020] [Indexed: 01/02/2023] Open
Abstract
Circulatory shock is associated with marked disturbances of the macro- and microcirculation and flow heterogeneities. Furthermore, a lack of tissue adenosine trisphosphate (ATP) and mitochondrial dysfunction are directly associated with organ failure and poor patient outcome. While it remains unclear if microcirculation-targeted resuscitation strategies can even abolish shock-induced flow heterogeneity, mitochondrial dysfunction and subsequently diminished ATP production could still lead to organ dysfunction and failure even if microcirculatory function is restored or maintained. Preserved mitochondrial function is clearly associated with better patient outcome. This review elucidates the role of the microcirculation and mitochondria during circulatory shock and patient management and will give a viewpoint on the advantages and disadvantages of tailoring resuscitation to microvascular or mitochondrial targets.
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Affiliation(s)
- Tamara Merz
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Nicole Denoix
- Clinic for Psychosomatic Medicine and Psychotherapy, Ulm University Medical Center, Ulm, Germany
| | - Markus Huber-Lang
- Institute for Clinical and Experimental Trauma-Immunology, University Hospital of Ulm, Ulm, Germany
| | - Mervyn Singer
- Bloomsbury Institute for Intensive Care Medicine, University College London, London, United Kingdom
| | - Peter Radermacher
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
| | - Oscar McCook
- Institute for Anesthesiological Pathophysiology and Process Engineering, Ulm University Medical Center, Ulm, Germany
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9
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Legrand M, Oufella HA, De Backer D, Duranteau J, Leone M, Levy B, Rossignol P, Vicaut E, Dépret F. The I-MICRO trial, Ilomedin for treatment of septic shock with persistent microperfusion defects: a double-blind, randomized controlled trial-study protocol for a randomized controlled trial. Trials 2020; 21:601. [PMID: 32611377 PMCID: PMC7329442 DOI: 10.1186/s13063-020-04549-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/22/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Septic shock remains a significant cause of death in critically ill patients. During septic shock, some patients will retain microcirculatory disorders despite optimal hemodynamic support (i.e., fluid resuscitation, vasopressors, inotropes). Alterations in the microcirculation are a key pathophysiological factor of organ dysfunction and death in septic shock patients. Ilomedin is a prostacyclin analog with vasodilatory effect and anti-thrombotic properties (i.e., inhibition of platelet aggregation) preferentially at the microcirculatory level. We hypothesize that early utilization of intravenous Ilomedin in septic shock patients with clinical persistence of microperfusion disorders would improve the recovery of organ dysfunction. METHODS The I-MICRO trial is a multicenter, prospective, randomized, double-blinded, placebo-controlled study. We plan to recruit 236 adult patients with septic shock and persistent microcirculatory disorders (i.e., skin mottling or increased capillary refill time) despite hemodynamic support. Participants will be randomized to receive a 48-h intravenous infusion of either Ilomedin or placebo starting at the earliest 6 h and later 24 h after septic shock. The primary outcome will be the change (delta) of sequential organ failure assessment (SOFA) score between randomization and day 7. Secondary outcomes will include mean SOFA score during the first 7 days after randomization, mortality at day 28 post-randomization, number of ventilation-free survival days in the 28 days post-randomization, number of renal replacement therapy-free survival days in the 28 days post-randomization, number of vasopressor-free survival days in the 28 days post-randomization, and mottling score at day 1 after randomization. DISCUSSION The trial aims to provide evidence on the efficacy and safety of Ilomedin in patients with septic shock and persistent microcirculatory disorders. TRIAL REGISTRATION NCT NCT03788837 . Registered on 28 December 2018.
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Affiliation(s)
- Matthieu Legrand
- Department of Anaesthesiology, Critical Care Medicine and Burn Unit, AP-HP, Saint Louis and Lariboisière University Hospitals, 2 rue A. Paré, 75010, Paris, France.
- INSERM UMR-S942, Institut National de la Santé et de la Recherche Médicale (INSERM), Lariboisière Hospital and INI-CRCT Network, Paris, France.
- Univ Paris Diderot, F-75475, Paris, France.
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, 500 Parnassus Avenue MUE416, Box 0648, San Francisco, CA, 94143, USA.
| | - Hafid Ait Oufella
- Assistance Publique - Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, Service de Réanimation Médicale, 75571, Paris Cedex 12, France
- Sorbonne Université, Université Pierre-et-Marie Curie, Paris 6, France
| | - Daniel De Backer
- Intensive Care Department, CHIREC Hospitals, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Duranteau
- Department of Anesthesia and Intensive Care, Hôpitaux Universitaires Paris Sud, Université Paris Sud XI, Le Kremlin Bicêtre, France
| | - Marc Leone
- Aix Marseille Université, Assistance Publique Hôpitaux de Marseille, Service d'Anesthésie et de Réanimation, Hôpital Nord, Marseille, France
| | - Bruno Levy
- Service de Réanimation Médicale, Centre Hospitalo-Universitaire de Nancy, F-54511, Vandœuvre-Lès-Nancy, France
- Université de Lorraine, F-54000, Nancy, France
| | - Patrick Rossignol
- Centre d'Investigation Clinique Plurithématique Pierre Drouin-INSERM CHU de Nancy, Nancy, France
- FCRIN INI-CRCT (Cardiovascular and Renal Clinical Trialists) Network, Université de Lorraine, Nancy, France
| | - Eric Vicaut
- APHP, Department of Biostatistics, Université Paris-Diderot, Sorbonne-Paris Cité, Fernand Widal Hospital, Paris, France
| | - François Dépret
- Department of Anaesthesiology, Critical Care Medicine and Burn Unit, AP-HP, Saint Louis and Lariboisière University Hospitals, 2 rue A. Paré, 75010, Paris, France
- INSERM UMR-S942, Institut National de la Santé et de la Recherche Médicale (INSERM), Lariboisière Hospital and INI-CRCT Network, Paris, France
- Univ Paris Diderot, F-75475, Paris, France
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10
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Dilken O, Ergin B, Ince C. Assessment of sublingual microcirculation in critically ill patients: consensus and debate. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:793. [PMID: 32647718 PMCID: PMC7333125 DOI: 10.21037/atm.2020.03.222] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The main concern in shock and resuscitation is whether the microcirculation can carry adequate oxygen to the tissues and remove waste. Identification of an intact coherence between macro- and microcirculation during states of shock and resuscitation shows a functioning regulatory mechanism. However, loss of hemodynamic coherence between the macro and microcirculation can be encountered frequently in sepsis, cardiogenic shock, or any hemodynamically compromised patient. This loss of hemodynamic coherence results in an improvement in macrohemodynamic parameters following resuscitation without a parallel improvement in microcirculation resulting in tissue hypoxia and tissue compromise. Hand-held vital microscopes (HVMs) can visualize the microcirculation and help to diagnose the nature of microcirculatory shock. Although treatment with the sole aim of recruiting the microcirculation is as yet not realized, interventions can be tailored to the needs of the patient while monitoring sublingual microcirculation. With the help of the newly introduced software, called MicroTools, we believe sublingual microcirculation monitoring and diagnosis will be an essential point-of-care tool in managing shock patients.
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Affiliation(s)
- Olcay Dilken
- Department of Intensive Care Med, Laboratory of Translational Intensive Care Med, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.,Department of Intensive Care, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Bulent Ergin
- Department of Intensive Care Med, Laboratory of Translational Intensive Care Med, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Can Ince
- Department of Intensive Care Med, Laboratory of Translational Intensive Care Med, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
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11
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Darmon M, Hoste E, Schetz M. Focus on metabolism, acute kidney injury and its influence on systemic organs. Intensive Care Med 2020; 46:1033-1035. [PMID: 32221649 DOI: 10.1007/s00134-020-06018-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 03/17/2020] [Indexed: 10/24/2022]
Affiliation(s)
- Michael Darmon
- Medical Intensive Care Unit, APHP, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010, Paris, France. .,ECSTRA Team, UMR 1153, Center of Epidemiology and Biostatistics, INSERM, Université de Paris, Paris, France.
| | - Eric Hoste
- Department of Intensive Care Medicine, Ghent University Hospital, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium.,Research Foundation-Flanders (FWO), Brussels, Belgium
| | - Miet Schetz
- Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven University, Herestraat 49, B3000, Louvain, Belgium
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12
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Abstract
PURPOSE OF REVIEW Adequate tissue perfusion is of utmost importance to avoid organ failure in patients with cardiogenic shock. Within the recent years, the microcirculation, defined as the perfusion of the smallest vessels, has been identified to play a crucial role. Microcirculatory changes may include capillary flow disturbances as well as changes in the density of perfused vessels. Due to the availability of new technologies to assess the microcirculation, interesting new data came up and it is the purpose of this review to summarize recent studies in the field. RECENT FINDINGS Nowadays, an increasing number of studies confirm parameters of the microcirculation, derived by intravital microscopy, to represent strong outcome predictors in cardiogenic shock. In addition, microcirculation as read-out parameter in innovative clinical studies has meanwhile been accepted as serious endpoint. Treatment strategies such as mechanical assist devices, blood pressure regulating agents or fluids use tissue perfusion and microcirculatory network density as targets in addition to clinical perfusion evaluation and decreasing serum lactate levels. SUMMARY The parameter most frequently used to detect tissue malperfusion is serum lactate. Novel, noninvasive methods to quantify microvascular perfusion have the potential to guide treatment in terms of optimizing organ perfusion and oxygenation probably paving the way for an individualized therapy.
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13
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Guven G, Hilty MP, Ince C. Microcirculation: Physiology, Pathophysiology, and Clinical Application. Blood Purif 2019; 49:143-150. [PMID: 31851980 DOI: 10.1159/000503775] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 09/28/2019] [Indexed: 12/17/2022]
Abstract
This paper briefly reviews the physiological components of the microcirculation, focusing on its function in homeostasis and its central function in the realization of oxygen transport to tissue cells. Its pivotal role in the understanding of circulatory compromise in states of shock and renal compromise is discussed. Our introduction of hand-held vital microscopes (HVM) to clinical medicine has revealed the importance of the microcirculation as a central target organ in states of critical illness and inadequate response to therapy. Technical and methodological developments have been made in hardware and in software including our recent introduction and validation of automatic analysis software called MicroTools, which now allows point-of-care use of HVM imaging at the bedside for instant availability of functional microcirculatory parameters needed for microcirculatory targeted resuscitation procedures to be a reality.
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Affiliation(s)
- Goksel Guven
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Matthias P Hilty
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Can Ince
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, The Netherlands,
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14
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Mari A, Nougue H, Mateo J, Vallet B, Vallée F. Transcutaneous PCO 2 monitoring in critically ill patients: update and perspectives. J Thorac Dis 2019; 11:S1558-S1567. [PMID: 31388461 DOI: 10.21037/jtd.2019.04.64] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The physiology of venous and tissue CO2 monitoring has a long and well-established physiological background, leading to the technological development of different tissue capnometric devices, such as transcutaneous capnometry monitoring (TCM). To outline briefly, measuring transcutaneous PCO2 (tcPCO2) depends on at least three main phenomena: (I) the production of CO2 by tissues (VCO2), (II) the removal of CO2 from the tissues by perfusion (wash-out phenomenon), and (III) the reference value of CO2 at tissue inlet represented by arterial CO2 content (approximated by arterial PCO2, or artPCO2). For this reason, there are, at present, roughly two clinical uses for tcPCO2 measurement: a respiratory approach where tcPCO2 is likely to estimate and non-invasively track artPCO2; and a hemodynamic under-estimate use where tcPCO2 can reflect tissue perfusion, summarized by a so-called "tc-art PCO2 gap". Recent research shows that these two uses are not incompatible and could be combined. The spectrum of indications and validation studies in ICUs is summarized in this review to give a survey of the potential applications of TCM in critically ill patients, focusing mainly on its potential (micro)circulatory monitoring contribution. We strongly believe that the greatest benefit of measuring tcPCO2 is not to only to estimate artPCO2, but also to quantify the gap between these two values, which can then help clinicians continuously and noninvasively assess both respiratory and hemodynamic failures in critically ill patients.
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Affiliation(s)
- Arnaud Mari
- Intensive Care Unit, Hôpital Yves Le Foll, Saint-Brieuc, France
| | - Hélène Nougue
- Department of Anesthesiology and Critical Care, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.,UMR-S942, Hôpital Lariboisière, Paris, France.,University of Paris Diderot, Paris, France
| | - Joaquim Mateo
- Department of Anesthesiology and Critical Care, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.,UMR-S942, Hôpital Lariboisière, Paris, France.,University of Paris Diderot, Paris, France
| | | | - Fabrice Vallée
- Department of Anesthesiology and Critical Care, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.,UMR-S942, Hôpital Lariboisière, Paris, France.,University of Paris Diderot, Paris, France.,MEDISIM, Inria Paris-Saclay, Palaiseau, France
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15
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Hilty MP, Guerci P, Ince Y, Toraman F, Ince C. MicroTools enables automated quantification of capillary density and red blood cell velocity in handheld vital microscopy. Commun Biol 2019; 2:217. [PMID: 31240255 PMCID: PMC6584696 DOI: 10.1038/s42003-019-0473-8] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 05/21/2019] [Indexed: 12/27/2022] Open
Abstract
Direct assessment of capillary perfusion has been prioritized in hemodynamic management of critically ill patients in addition to optimizing blood flow on the global scale. Sublingual handheld vital microscopy has enabled online acquisition of moving image sequences of the microcirculation, including the flow of individual red blood cells in the capillary network. However, due to inherent content complexity, manual image sequence analysis remained gold standard, introducing inter-observer variability and precluding real-time image analysis for clinical therapy guidance. Here we introduce an advanced computer vision algorithm for instantaneous analysis and quantification of morphometric and kinetic information related to capillary blood flow in the sublingual microcirculation. We evaluated this technique in a porcine model of septic shock and resuscitation and cardiac surgery patients. This development is of high clinical relevance because it enables implementation of point-of-care goal-directed resuscitation procedures based on correction of microcirculatory perfusion in critically ill and perioperative patients.
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Affiliation(s)
- Matthias Peter Hilty
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, 3015GD The Netherlands
| | - Philippe Guerci
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, 3015GD The Netherlands
| | - Yasin Ince
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, 3015GD The Netherlands
| | - Fevzi Toraman
- Department of Anesthesiology and Reanimation, Acıbadem Mehmet Ali Aydınlar University School of Medicine, Istanbul, 34752 Turkey
| | - Can Ince
- Department of Intensive Care, Erasmus MC, University Medical Center, Rotterdam, 3015GD The Netherlands
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16
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Mesquida J, Espinal C, Saludes P, Cortés E, Pérez-Madrigal A, Gruartmoner G. Central venous-to-arterial carbon dioxide difference combined with arterial-to-venous oxygen content difference (P cvaCO 2/C avO 2) reflects microcirculatory oxygenation alterations in early septic shock. J Crit Care 2019; 53:162-168. [PMID: 31247515 DOI: 10.1016/j.jcrc.2019.06.013] [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: 02/14/2019] [Revised: 05/28/2019] [Accepted: 06/16/2019] [Indexed: 11/19/2022]
Abstract
PURPOSE To explore the relationship between central venous-to-arterial carbon dioxide difference (PcvaCO2), PcvaCO2/arterial-venous oxygen content difference ratio (PcvaCO2/CavO2) and the microcirculatory status, evaluated by using near-infrared spectroscopy, in septic shock patients. METHODS Observational study in a 30-bed mixed ICU. Fifty septic shock patients within the first 24 h of ICU admission were studied. After restoration of mean arterial pressure, hemodynamic, metabolic and microcirculatory parameters were simultaneously evaluated. Local tissue oxygen saturation (StO2), and local hemoglobin index (THI) were measured on the thenar eminence by means of near-infrared spectroscopy. A transient vascular occlusion test was performed in order to obtain StO2 deoxygenation rate (DeO2), local oxygen consumption (nirVO2), and reoxgenation rate (ReO2). RESULTS At inclusion, increased PcvaCO2 values were associated with lower StO2 and THI, whereas increased PcvaCO2/CavO2 values were associated with lower DeO2, nirVO2, and ReO2. Multiple regression models confirmed the association between PcvaCO2/CavO2 and nirVO2, while PcvaCO2 was only related to CI, and not to microcirculatory parameters. CONCLUSIONS In a population of early septic shock patients, increases in PcvaCO2 and PcvaCO2/CavO2 reflected different alterations at the microcirculatory level. While PcvaCO2 was related to global flow, the PcvaCO2/CavO2 ratio was associated to impaired local oxygen utilization and diminished microvascular reactivity.
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Affiliation(s)
- J Mesquida
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - C Espinal
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - P Saludes
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - E Cortés
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain.
| | - A Pérez-Madrigal
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain
| | - G Gruartmoner
- Critical Care Department, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Sabadell, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain.
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17
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Huber W, Zanner R, Schneider G, Schmid R, Lahmer T. Assessment of Regional Perfusion and Organ Function: Less and Non-invasive Techniques. Front Med (Lausanne) 2019; 6:50. [PMID: 30968023 PMCID: PMC6438879 DOI: 10.3389/fmed.2019.00050] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 02/25/2019] [Indexed: 12/13/2022] Open
Abstract
Sufficient organ perfusion essentially depends on preserved macro- and micro-circulation. The last two decades brought substantial progress in the development of less and non-invasive monitoring of macro-hemodynamics. However, several recent studies suggest a frequent incoherence of macro- and micro-circulation. Therefore, this review reports on interactions of macro- and micro-circulation as well as on specific regional and micro-circulation. Regarding global micro-circulation the last two decades brought advances in a more systematic approach of clinical examination including capillary refill time, a graded assessment of mottling of the skin and accurate measurement of body surface temperatures. As a kind of link between macro- and microcirculation, a number of biochemical markers can easily be obtained. Among those are central-venous oxygen saturation (ScvO2), plasma lactate and the difference between central-venous and arterial CO2 (cv-a-pCO2-gap). These inexpensive markers have become part of clinical routine and guideline recommendations. While their potential to replace parameters of macro-circulation such as cardiac output (CO) is limited, they facilitate the interpretation of the adequacy of CO and other macro-circulatory markers. Furthermore, they give additional hints on micro-circulatory impairment. In addition, a number of more sophisticated technical approaches to quantify and visualize micro-circulation including video-microscopy, laser flowmetry, near-infrared spectroscopy (NIRS), and partial oxygen pressure measurement have been introduced within the last 20 years. These technologies have been extensively used for scientific purposes. Moreover, they have been successfully used for educational purposes and to visualize micro-circulatory disturbances during sepsis and other causes of shock. Despite several studies demonstrating the association of these techniques and parameters with outcome, their practical application still is limited. However, future improvements in automated and “online” diagnosis will help to make these technologies more applicable in clinical routine. This approach is promising with regard to several studies which demonstrated the potential to guide therapy in different types of shock. Finally several organs have specific patterns of circulation related to their special anatomy (liver) or their auto-regulatory capacities (brain, kidney). Therefore, this review also discusses specific issues of monitoring liver, brain, and kidney circulation and function.
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Affiliation(s)
- Wolfgang Huber
- Medizinische Klinik und Poliklinik II, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Robert Zanner
- Klinik für Anästhesiologie, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Gerhard Schneider
- Klinik für Anästhesiologie, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Roland Schmid
- Medizinische Klinik und Poliklinik II, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Tobias Lahmer
- Medizinische Klinik und Poliklinik II, Klinikum rechts der Isar, Technische Universität München, München, Germany
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18
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Hariri G, Joffre J, Leblanc G, Bonsey M, Lavillegrand JR, Urbina T, Guidet B, Maury E, Bakker J, Ait-Oufella H. Narrative review: clinical assessment of peripheral tissue perfusion in septic shock. Ann Intensive Care 2019; 9:37. [PMID: 30868286 PMCID: PMC6419794 DOI: 10.1186/s13613-019-0511-1] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/01/2019] [Indexed: 12/21/2022] Open
Abstract
Sepsis is one of the main reasons for intensive care unit admission and is responsible for high morbidity and mortality. The usual hemodynamic targets for resuscitation of patients with septic shock use macro-hemodynamic parameters (hearth rate, mean arterial pressure, central venous pressure). However, persistent alterations of microcirculatory blood flow despite restoration of macro-hemodynamic parameters can lead to organ failure. This dissociation between macro- and microcirculatory compartments brings a need to assess end organs tissue perfusion in patients with septic shock. Traditional markers of tissue perfusion may not be readily available (lactate) or may take time to assess (urine output). The skin, an easily accessible organ, allows clinicians to quickly evaluate the peripheral tissue perfusion with noninvasive bedside parameters such as the skin temperatures gradient, the capillary refill time, the extent of mottling and the peripheral perfusion index.
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Affiliation(s)
- Geoffroy Hariri
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France
| | - Jérémie Joffre
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France
| | - Guillaume Leblanc
- Division of Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine, Université Laval, Québec City, QC, Canada.,Population Health and Optimal Health Practices Research Unit (Trauma - Emergency - Critical Care Medicine), Centre de recherche du CHU de Québec - Université Laval, Université Laval, Québec City, QC, Canada
| | - Michael Bonsey
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France
| | - Jean-Remi Lavillegrand
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France
| | - Tomas Urbina
- Service de réanimation médicale, 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 réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France.,Inserm U1136, Paris, 75012, France
| | - Eric Maury
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France.,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France.,Inserm U1136, Paris, 75012, France
| | - Jan Bakker
- Department Intensive Care Adults, Erasmus MC University Medical Center, Rotterdam, The Netherlands.,Department of Pulmonology and Critical Care, Columbia University Medical Center, New York, USA.,Department of Pulmonology and Critical Care, New York University Medical Center - Bellevue Hospital, New York, USA.,Department of Intensive Care, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Hafid Ait-Oufella
- Service de réanimation médicale, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, 75571, Paris Cedex 12, France. .,Sorbonne Université, Université Pierre-et-Marie Curie-Paris 6, Paris, France. .,Inserm U970, Centre de Recherche Cardiovasculaire de Paris (PARCC), Paris, France.
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