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Review
. 2018 Oct;6(19):386.
doi: 10.21037/atm.2018.10.11.

Mechanical ventilation and respiratory monitoring during extracorporeal membrane oxygenation for respiratory support

Affiliations
Review

Mechanical ventilation and respiratory monitoring during extracorporeal membrane oxygenation for respiratory support

Nicolò Patroniti et al. Ann Transl Med. 2018 Oct.

Abstract

Over the past decade, the use of veno-venous extracorporeal membrane oxygenation (VV-ECMO) for respiratory support has widely expanded as a treatment strategy for patients with acute respiratory distress syndrome (ARDS). Despite considerable attention has been given to the indications, the timing and the management of patients undergoing ECMO for refractory respiratory hypoxemic failure, little is known regarding the management of mechanical ventilation (MV) in this group of patients. ECMO enables to minimize ventilatory induced lung injury (VILI) and it has been successfully used as rescue therapy in patients with ARDS when conventional ventilator strategies have failed. However, literature is lacking regarding the best strategies and MV settings, including positive end expiratory pressure (PEEP), tidal volume (VT), respiratory rate (RR) and plateau pressure (PPLAT). The aim of this review is to summarize current evidence, the rationale and provide recommendations about the best ventilator strategy to adopt in patients with ARDS undergoing VV-ECMO support.

Keywords: Mechanical ventilation (MV); acute respiratory distress syndrome (ARDS); extracorporeal membrane oxygenation (ECMO); positive end expiratory pressure (PEEP).

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Conflict of interest statement

Conflicts of Interest: The authors have no conflicts of interest to declare.

Figures

Figure 1
Figure 1
A flow chart of ventilator settings after ECMO starting. Sequence of setting changes follow literature common procedure. Tidal volume (VT) is decrease targeting a safe plateau airway pressure or targeting a predefined VT value (ultra-protective ventilation). After adjusting VT, respiratory rate (RR) may be changed according to PaCO2/pH or target to a fixed low level (5–10 bpm). Decrease of VT and RR are allowed by CO2 removal mainly modulated by acting on sweep gas flow (GF). This is feasible both with ECMO or ECCO2R. When high ECMO blood flows (BF) are used, oxygenation is supported, and FiO2 may be decreased. PEEP may either be decreased if a total lung rest strategy is used, or may be set to avoid derecruitment associated to low VT ventilation (black dotted line). ↓, decrease; ↑, increase. ECMO, extracorporeal membrane oxygenation.

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