Fig. 1From: Potential of cell-free hemoglobin and haptoglobin as prognostic markers in patients with ARDS and treatment with veno-venous ECMOPatient flow diagram. ECLS—extracorporeal life support; ECMO—extracorporeal membrane oxygenation with veno-veno-arterial (V-VA), venoarterial (V-A), or venovenous (V-V) cannulationBack to article page