Improvement of fabrication process of vacuum formed valves for ventricular assist device

M. Umezu, M. Ranawake, T. Nakayama, K. Kobayashi, T. Kido, C. Nojiri, T. Kijima, T. Fujimoto, T. Akutsu

研究成果: Article査読

抄録

In order to provide an inexpensive ventricular assist device (VAD), we developed a 20mL-VAD which was followed by Prof. Kolff's design, but two problems were found; 1) Big amount of regurgitation through inlet bileaflet valve. 2) High resistance of outlet trileaflet valve. Following trials were carried out to settle them; 1) In the manufacturing process of the bileaflet valve, elastic material was used instead of hard plastic plate. Then, regurgitation could be reduced to 1/6. Moreover, total manufacturing process could be dramatically simplified. 2) In the manufacturing process of the trileaflet valve, leaflet thickness was well controlled around 0.2 mm with the aid of a special ring which was located around the valve mold. Then, lower resistance could be achieved by a thin (0.19mm) leaflet valve. Moreover, all valves could be passed the durability testing for 14 days. These data is helpful towards a pre-production stage of the VAD development.

本文言語English
ページ(範囲)43-47
ページ数5
ジャーナルJapanese Journal of Artificial Organs
25
1
出版ステータスPublished - 1996 5 14

ASJC Scopus subject areas

  • 生物理学

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