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Japanese

Clinical prolonged ventricular bypass assist in patients with critical cardiac condition and its experimental basis Kazumi Taguchi 1 , Takamitsu Hasegawa 1 , Junji Murashita 1 , Gen Takezawa 1 , Taijiro Sueda 1 , Yoshiyuki Maeda 1 1Dept. of Surgery, Hiroshima University School of Medicine pp.1053-1060
Published Date 1984/10/15
DOI https://doi.org/10.11477/mf.1404204529
  • Abstract
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Purpose: A long term expriment of transapical left ventricular and biventricular bypass was con-ducted in 40 calves and then clinically applied to 34 patients with intractable cardiac failure.

Method: An extracorporeal circuit with pump-ing, 1) between LV and aorta, and 2) between RA and PA, with blood filter and roller pump under local heparinization was performed. The console was designed having 1) automatic pumping con-troller with Doppler air bubble detector and with negative pressor detector in withdrawal side, 2) computerized detection of blood filter clotting, 3) local heparinization lines, and 4) specially designed ventricular cannula coated with Polyurethane.

Results: 1) experimental bypass with a flow rate equivalent to 30-85% of the cardiac output meas-ured prior to bypass was maintained for 3-50 days. 94% of animals survived. 2) No bleeding or throm-boembolic problems in experimental animals was observed. 3) In clinical patients flow was controlled to achieve maximal flow rate up to 100% in the initial stage or supporting and gradually decreased to 30-40% of chronic support. 4) Total of 34 patients with myocardial infarction, cardiac surgical cases, 34 patients survived. 6) Almost half of the patients could be successfully weaned off from bypass.

Conclusion: The bypass technique described here was proven to be a important support for a certain number of patients with advanced cardiac failure.


Copyright © 1984, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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