Hydrodynamic endurance test of the prosthetic valve used in the various types of the ventricular assist device.

S. Nitta, T. Yambe, Y. Katahira, T. Sonobe, Y. Saijoh, S. Naganuma, H. Akiho, Y. Kakinuma, M. Tanaka, M. Miura

Research output: Contribution to journalArticle

Abstract

To evaluate the various basic designs of the pump chambers used in the ventricular assist devices (VADs), hydrodynamic endurance test was performed from the viewpoint of the durability of the prosthetic valves used in the VAD. For the hydrodynamic analysis, we designed three basic types of pump (sac type, diaphragm type, and pusher plate type) using the same material and having the same capacity and shape. Prosthetic valves in these VADs were tested from the standpoint of the water hammer effect, which affects the valve durability, to determine which pump design would be most durable as a prosthetic valve in the VAD. The water-hammer phenomenon was evaluated using the maximum pressure gradient (MPG) across the prosthetic valve in the moc circulatory loop. Maximum pump output was recorded when we used the diaphragm type model, and minimum MPG in the commonly used driving condition of the VAD were recorded when we used the sac type model. The results suggest that the sac type VAD model is the most durable design for the prosthetic value.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalThe science reports of the research institutes, Tohoku University. Ser. C, Medicine. Tōhoku Daigaku
Volume38
Issue number2-4
Publication statusPublished - 1991 Dec

ASJC Scopus subject areas

  • Medicine(all)

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