A propósito de la contingencia COVID-19. ECMO en el adulto: Oxigenación por membrana extracorpórea. A quién, cómo y cuándo/ With regard to COVID-19 contingency. ECMO in adults. Extracorporeal Membrane Oxygenation). To whom, how and when

ECMO (Extracorporeal Membrane Oxygenation) is an extracorporeal life support system in catastrophic lung failure, shock and cardiopulmonary resuscitation, in different age groups, with multiple physiologic features. When the candidate to be submitted is too unstable to be transported to a hospital with ECMO, cannulation before transfer allows stabilization and subsequent transport. The aim of this article is to review the current concepts of extracorporeal support, its indications, national and international experience, and its possible role in the SARS-Cov2 pandemic.