Circulating venous blood outside the body, through an artificial lung (membrane oxygenator), and returning oxygenated blood to the patient is extracorporeal gas exchange. Oxygen and carbon dioxide exchange in a membrane lung is controlled by regulating blood flow, blood composition, and device design. With this control, lung function can be replaced for weeks by artificial organs. © 2020 American Physiological Society. Compr Physiol 10:879-891, 2020.
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