Feasibility trial to inform a future multicentre randomized control trial. The investigators aim to evaluate the feasibility of a trial of near apnoeic ventilation (two breaths per minute) compared with standard ventilation (respiratory rate between 10 and 30 breaths) for patients with acute respiratory distress syndrome (ARDS) supported with veno-venous extracorporeal membrane oxygenation (V-V ECMO). Additionally, when a patient is determined as ready to wean from ECMO the investigators will explore the feasibility of two ECMO weaning strategies and explore the physiological effects on respiratory effort and gas exchange.
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Number of patients receiving a ventilation strategy other than the assigned ventilation strategy over the 72 hour period following randomisation
Timeframe: During the 72 hours following randomisation