Comparison of opening behaviors of monoleaflet tilting disc valves using a high speed video camera

Tetsuo Fujimoto, Yasutaka Maki, Yasuyuki Shiraishi, Mitsuo Umezu, Kiyoshi Naemura, Toshinosuke Akutsi

    Research output: Contribution to journalArticle

    Abstract

    We have been studying the opening action of a monoleaflet tilting disc valve, (Bjork-Shiley Monostrut; sewing ring diameter: 23 mm, BSM), and reported last year that the valve opening motion depended on the early period flow rate pattern from 0 to 20 msec. This time, the Bjork-Shiley Spherical and the St. Vincent's valve were tested. All three valves are monoleaflet tilting disc valves with the same disc diameter but with disc shapes that are different from each other. Each valve was incorporated in a mitral position of a mock circulatory system driven by pneumatic pressure. Changes in valvular disc angle were measured at 500 frames per second using a high speed videocamera. We found the opening motion of the two valves depended on the early period flow rate pattern (from 0 to 20 msec; the same as the BSM valve). Using the moment of force values obtained, drag and lift coefficients (C(D) and C(L)) of each valve were calculated. Results showed that the C(D) and the C(L) were enlarged up to 3.0 x 104 at the early opening period. This result was speculated to be a cause of the influence of the flow pattern on the valve action at the same period.

    Original languageEnglish
    Pages (from-to)158-163
    Number of pages6
    JournalJapanese Journal of Artificial Organs
    Volume27
    Issue number1
    Publication statusPublished - 1998

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    Dilatation and Curettage
    Cardiovascular System
    Pressure

    Keywords

    • Drag coefficient
    • High speed video camera
    • Mechanical circulatory system
    • Monoleaflet tilting disc valve
    • Opening behavior

    ASJC Scopus subject areas

    • Biophysics

    Cite this

    Comparison of opening behaviors of monoleaflet tilting disc valves using a high speed video camera. / Fujimoto, Tetsuo; Maki, Yasutaka; Shiraishi, Yasuyuki; Umezu, Mitsuo; Naemura, Kiyoshi; Akutsi, Toshinosuke.

    In: Japanese Journal of Artificial Organs, Vol. 27, No. 1, 1998, p. 158-163.

    Research output: Contribution to journalArticle

    Fujimoto, T, Maki, Y, Shiraishi, Y, Umezu, M, Naemura, K & Akutsi, T 1998, 'Comparison of opening behaviors of monoleaflet tilting disc valves using a high speed video camera', Japanese Journal of Artificial Organs, vol. 27, no. 1, pp. 158-163.
    Fujimoto, Tetsuo ; Maki, Yasutaka ; Shiraishi, Yasuyuki ; Umezu, Mitsuo ; Naemura, Kiyoshi ; Akutsi, Toshinosuke. / Comparison of opening behaviors of monoleaflet tilting disc valves using a high speed video camera. In: Japanese Journal of Artificial Organs. 1998 ; Vol. 27, No. 1. pp. 158-163.
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