Effectiveness of a Cardiopulmonary Bypass Circuit with Parallel Centrifugal and Roller Pumps in an Accidental Centrifugal Pump Stoppage

At our institution, a pre-connected cardiopulmonary bypass circuit was designed to ensure operational convenience and safety by connecting the centrifugal and roller pumps in parallel, allowing selective use. During surgery for acute aortic dissection（Stanford type A）in a man in his 50s, the centrifugal pump（CP5）suddenly stopped when its control panel blacked out. The incident was promptly reported to the surgical field, the centrifugal pump outlet was clamped, and perfusion was switched to the roller pump. The interruption of perfusion lasted approximately 7-8 seconds.