overall: 95 cm x 99 cm x 61.6 cm; 37 13/32 in x 38 31/32 in x 24 1/4 in
United States: Minnesota, Minneapolis
Several types of heart-lung machines and oxygenators were developed in the 1950’s and 1960’s. The Smithsonian’s collection includes roller pumps, membrane, and bubble oxygenators. This rotating screen oxygenator was developed by Clarence Dennis (1909-2003) and colleagues in 1947. Blood entered the oxygenator through a low speed jet in the center of the revolving screen disc and a film of blood is laid on the disc by centrifugation and gravity. The rotating screen oxygenator was efficient and relatively easy to clean.