2025 年 52 巻 4 号 p. 576-580
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.
Because arterial pump cessation is a critical event requiring rapid and sound judgment, a pre-established parallel circuit proved effective in minimizing perfusion interruption and ensuring patient safety. Although the exact cause of pump stoppage was not identified, this case highlights the importance of circuit design and preparedness for prompt response to unexpected pump failure.
