Ethics Discussion Paper: Ethical Considerations for Withdrawal of VA-ECMO Support for Patients in Cardiogenic Shock if Prognosis is Poor
Abstract
Extracorporeal Membrane Oxygenation (ECMO) is an advanced form of life support for individuals with critical illnesses affecting their heart and/or lungs. Some conditions in which ECMO may be considered include myocarditis, sepsis, cardiogenic shock, and respiratory failure. It can be used as a bridge to recovery, bridge to heart/lung transplant, bridge to ventricular assist device (VAD) transplantation for lengthier circulatory support, or bridge to decision therapy where prognosis is unclear but there is still a chance of recovery. With venoarterial ECMO (VA-ECMO), blood is drained from a vein into the ECMO circuit before entering an oxygenator where gas exchange occurs across a semi-permeable membrane. This oxygenated blood is then returned to the patient via an artery. VA-ECMO provides both respiratory and cardiac support by delivering adequate tissue perfusion. Individuals are typically supported by VA-ECMO for hours to weeks depending on the progression of the medical condition.
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