Extra-Corporeal Membrane Oxygenation (ECMO) is an advanced life support technique used for patients with severe respiratory or cardiac failure when conventional therapies are insufficient. ECMO provides temporary support by oxygenating the blood and removing carbon dioxide, effectively functioning as an external heart-lung machine. This extra time can allow the patient’s heart and lungs to recover or provide a window for additional treatment options.
ECMO is composed of several key parts:
- Cannulae: Specialized tubes are inserted into the patient’s bloodstream—typically near large blood vessels or in the chest—to drain deoxygenated blood and return oxygenated blood after processing. These single-use cannulae are carefully sized and inserted by trained staff.
- Tubing: The cannulae are connected to the ECMO machine using clear, disposable, and compressible tubing through which the blood flows.
- ECMO Pump and Membrane: The ECMO pump draws blood from the patient and propels it towards the ECMO membrane (often called the oxygenator). The membrane adds oxygen to the blood, removes carbon dioxide, and can also add heat. The pump is designed to circulate nearly the entire blood volume of the patient each minute.
- ECMO Machine: This is the central hardware that houses the pump and membrane. It provides the necessary controls and monitoring for the ECMO circuit and is typically positioned on a specialized trolley at the foot of the patient’s bed.
ECMO is a high-risk procedure requiring highly skilled expert clinicians. By providing temporary life support, ECMO gives the heart and lungs a chance to recover and stabilizes critically ill patients until further treatment decisions can be made.