More Than Turning Knobs: The Expanding Role of the Clinical Perfusionist Irvin B. Birenbaum, Dennis C. Rivard, Steven J. Thompson, Robert C. Baldwin Jr., Candace L. Banchieri and Michael S. Harple J Extra Corpor Technol, 20 (1988) 99-102 Published online: 25 August 2023 DOI: 10.1051/ject/198820S099