ECMO circuit (IMAGE) Michigan Medicine - University of Michigan Caption This simplified diagram of the type of ECMO use in nearly all COVID-19 patients shows the flow of blood out of the body, through the circuit's components, and back into the body. Credit University of Michigan Usage Restrictions Credit University of Michigan License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.