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Meta-Analysis
. 2016 Nov;42(11):1672-1684.
doi: 10.1007/s00134-016-4507-0. Epub 2016 Sep 1.

Associations between ventilator settings during extracorporeal membrane oxygenation for refractory hypoxemia and outcome in patients with acute respiratory distress syndrome: a pooled individual patient data analysis : Mechanical ventilation during ECMO

Collaborators, Affiliations
Meta-Analysis

Associations between ventilator settings during extracorporeal membrane oxygenation for refractory hypoxemia and outcome in patients with acute respiratory distress syndrome: a pooled individual patient data analysis : Mechanical ventilation during ECMO

Ary Serpa Neto et al. Intensive Care Med. 2016 Nov.

Abstract

Purpose: Extracorporeal membrane oxygenation (ECMO) is a rescue therapy for patients with acute respiratory distress syndrome (ARDS). The aim of this study was to evaluate associations between ventilatory settings during ECMO for refractory hypoxemia and outcome in ARDS patients.

Methods: In this individual patient data meta-analysis of observational studies in adult ARDS patients receiving ECMO for refractory hypoxemia, a time-dependent frailty model was used to determine which ventilator settings in the first 3 days of ECMO had an independent association with in-hospital mortality.

Results: Nine studies including 545 patients were included. Initiation of ECMO was accompanied by significant decreases in tidal volume size, positive end-expiratory pressure (PEEP), plateau pressure, and driving pressure (plateau pressure - PEEP) levels, and respiratory rate and minute ventilation, and resulted in higher PaO2/FiO2, higher arterial pH and lower PaCO2 levels. Higher age, male gender and lower body mass index were independently associated with mortality. Driving pressure was the only ventilatory parameter during ECMO that showed an independent association with in-hospital mortality [adjusted HR, 1.06 (95 % CI, 1.03-1.10)].

Conclusion: In this series of ARDS patients receiving ECMO for refractory hypoxemia, driving pressure during ECMO was the only ventilator setting that showed an independent association with in-hospital mortality.

Keywords: ARDS; Driving pressure; ECMO; Mechanical ventilation; PEEP; Refractory hypoxemia.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

Figures

Fig. 1
Fig. 1
(Upper panel) Cumulative incidence curve of in-hospital mortality; (lower panel) number of patients under mechanical ventilation (orange line), or ECMO (blue line)
Fig. 2
Fig. 2
Tidal volume size (V T), respiratory rate, inspired oxygen fractions (FiO2), positive end-expiratory pressure (PEEP) levels, plateau pressure (Pplat) levels, and driving pressure (ΔP) in survivors (orange line) and non-survivors (blue line) during extracorporeal membrane oxygenation for the acute respiratory distress syndrome. Before before extracorporeal membrane oxygenation; days 1, 2 and 3, the first, second and third day of ECMO; data are presented as medians and their interquartile ranges, and only for patients that were still receiving ECMO
Fig. 3
Fig. 3
PaO2/FiO2, PaCO2 levels, pHa, and lactate levels in survivors (orange line) and non-survivors (blue line) during extracorporeal membrane oxygenation (ECMO) for the acute respiratory distress syndrome. Before before extracorporeal membrane oxygenation; days 1, 2 and 3, the first, second and third day of ECMO; data are presented as medians and their interquartile ranges, and only for patients that were still receiving ECMO

Comment in

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