ECMO

ECMO

Subject: Science & tech

Context : Over the past several weeks, as the second wave of Covid-19 has devastated India and patients have struggled against an acute shortage of medical oxygen and ICU beds, a clinical intervention technique known as ‘ECMO’ has entered the vocabulary of common conversation.

Concept:

• Extracorporeal membrane oxygenation (ECMO), also known as extracorporeal life support (ECLS), is an extracorporeal technique of providing prolonged cardiac and respiratory support to persons whose heart and lungs are unable to provide an adequate amount of gas exchange or perfusion to sustain life.
• The technology for ECMO is largely derived from cardiopulmonary bypass, which provides shorter-term support with arrested native circulation.
• The device used is a membrane oxygenator, also known as an artificial lung.
• ECMO works by temporarily drawing blood from the body to allow artificial oxygenation of the red blood cells and removal of carbon dioxide.
• Generally, it is used either post-cardiopulmonary bypass or in late-stage treatment of a person with profound heart and/or lung failure, although it is now seeing use as a treatment for cardiac arrest in certain centers, allowing treatment of the underlying cause of arrest while circulation and oxygenation are supported.
• ECMO is also used to support patients with the acute viral pneumonia associated with COVID-19 in cases where artificial ventilation is not sufficient to sustain blood oxygenation levels.