Clarence Dennis

Clarence Dennis
Born(1909-06-16)June 16, 1909
DiedJuly 11, 2005(2005-07-11) (aged 96)
EducationJohns Hopkins (M.D.)
Known forpioneering cardiopulmonary bypass
Medical career
ProfessionSurgeon
InstitutionsUniversity of Minnesota, SUNY Downstate Medical Center, National Institutes of Health, SUNY Stony Brook
Sub-specialtiescardiothoracic surgery
Researchopen-heart surgery

Clarence Dennis (June 16, 1909 – July 11, 2005) was an American cardiothoracic surgeon best known for his work in pioneering cardiopulmonary bypass (CPB). He had invented one of the first heart-lung bypass machines, and in 1951 he became the first to use such a device during an open-heart operation.