Recirculation in Extracorporeal Membrane Oxygenation: The Warning Comes From the Cannula
In conclusion, poor oxygenation under ECMO with alternation of bright red and dark red blood in the drainage cannula must refer to recirculation by cannula misplacement. Transesophageal echocardiography must be performed first when there is a lack of oxygenation during venovenous ECMO.
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