IMV to Accelerate Recovery of Lung Function in Veno-venous Extracorporeal Membrane Oxygenation; Lung Rest Or Moderate Mechanical Ventilation in ECMO

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.