Development and evaluation of totally implantable ventricular assist system using a vibrating flow pump and transcutaneous energy transmission system with amorphous fibers

Tomoyuki Yambe, Hiroyuki Hashimoto, Shin Ichi Kobayashi, Taro Sonobe, Shigeru Naganuma, Shun Suke Nanka, Hidetoshi Matsuki, Makoto Yoshizawa, Kou Ichi Tabayashi, Hideki Takayasu, Hiroshi Takeda, Shin Ichi Nitta

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We have developed a vibrating flow pump (VFP) that can generate oscillated blood flow with a relatively high frequency (10-50 Hz) for a totally implantable ventricular assist system (VAS). To evaluate the newly developed VAS, left heart bypasses, using the VFP, were performed in chronic animal experiments. Hemodynamic parameters were recorded in a data recorder in healthy adult goats during an awake condition and analyzed in a personal computer system through an alternating-direct current converter. Basic performance of the total system with a transcataneous energy transmission system were satisfactory. During left ventricular assistance with the VFP, Mayer wave fluctuations of hemodynamics were decreased in the power spectrum, the fractal dimensions of the hemodynamics were significantly decreased, and peripheral vascular resistance was significantly decreased. These results suggest that cardiovascular regulatory nonlinear dynamics, which mediate the hemodynamics, may be affected by left ventricular bypass with oscillated flow. The decreased power of the Mayer wave in the spectrum caused the limit cycle attractor of the hemodynamics and decreased peripheral resistance. These results suggest that this newly developed VAS is useful for the totally implantable system with unique characteristics that can control hemodynamic properties.

Original languageEnglish
Pages (from-to)41-43
Number of pages3
JournalHeart and Vessels
Volume12
Issue numberSUPPL. 12
Publication statusPublished - 1997

Keywords

  • Chaos
  • Fractal
  • Oscillated flow
  • Ventricular assist device
  • Vibrating flow pump (VFP)

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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