Calculation of input impedance to reproduce the aorta in a mechanical circulatory system

T. Fujimoto, Y. Katou, K. Naemura, H. Fujimasu, Mitsuo Umezu

    Research output: Contribution to journalArticle

    Abstract

    A mechanical circulatory system (MCS) has been developed in order to evaluate artificial organs, including circulatory assist devices and artificial prosthetic heart valves. An effective functioning MCS, which is similar to the natural system, would allow us to use it as a substitute for animal experimentation. The purpose of this study is to reproduce the aorta in the MCS. This simulator includes a fluid circuit, drive and measuring systems. The fluid circuit consists of an artificial atrium, ventricle and aorta which physically and functionally designed to be almost identical to those of natural organs with reference to an anatomical weight of 60 kg. Input impedance was calculated with a personal computer from pressure and flow rate measured at the aorta in the MCS. The impedance analysis data from the silicone aorta indicated that at a minimum modulus of impedance occurred at the 4th harmonics in phase. This input impedance pattern obtained was close to that of the natural aorta.

    Original languageEnglish
    Pages (from-to)221-225
    Number of pages5
    JournalJapanese Journal of Artificial Organs
    Volume24
    Issue number1
    Publication statusPublished - 1995

    Fingerprint

    Cardiovascular System
    Electric Impedance
    Aorta
    Artificial Organs
    Artificial Heart
    Heart-Assist Devices
    Heart Valves
    Microcomputers
    Silicones
    Pressure
    Weights and Measures
    Equipment and Supplies

    Keywords

    • aorta
    • circulatory assist device
    • input impedance
    • mechanical circulatory system (MCS)
    • simulator

    ASJC Scopus subject areas

    • Biophysics

    Cite this

    Calculation of input impedance to reproduce the aorta in a mechanical circulatory system. / Fujimoto, T.; Katou, Y.; Naemura, K.; Fujimasu, H.; Umezu, Mitsuo.

    In: Japanese Journal of Artificial Organs, Vol. 24, No. 1, 1995, p. 221-225.

    Research output: Contribution to journalArticle

    Fujimoto, T. ; Katou, Y. ; Naemura, K. ; Fujimasu, H. ; Umezu, Mitsuo. / Calculation of input impedance to reproduce the aorta in a mechanical circulatory system. In: Japanese Journal of Artificial Organs. 1995 ; Vol. 24, No. 1. pp. 221-225.
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