JaLCDOI 10.18926/AMO/32662
FullText URL fulltext.pdf
Author Ishino, Kozo| Murakami, Taiji| Irie, Hiroyuki| Nakayama, Hironobu| Izumoto, Hiroshi| Yamada, Makoto| Teraoka, Hiromichi| Sanoo, Yoshimasa| Teramoto, Shigeru|
Abstract <p>The present study was undertaken to determine whether a biventricular bypass system operated in an independent variable rate (VR) mode can maintain the entire circulation. Two pusher-plate pumps which incorporated the Hall effect position sensors were used to bypass the right and left ventricles in 10 sheep under fibrillation. The flow distributions of the pump output to the carotid and renal arteries were investigated every 6 h using ultrasonic blood flow meters for 24 h in 5 animals, and the controllability of the VR mode was evaluated in 5 long-term experiments. The carotid artery flow ratio to the pump output decreased significantly from 4.7 +/- 0.8% before the bypass to 2.7 +/- 0.9% after 24 h. However, the renal artery flow ratio did not change throughout the experiments. In the long-term experiments, the animals were kept alive from 3 to 48 days (mean 15.6 days). The mean pump output had been maintained at more than 90 ml/min/kg for the first 7 days. After the surgery, the pump driving conditions were not readjusted in any experiment. The results indicate that the biventricular bypass system operated in the independent VR mode automatically maintains the entire circulation at a satisfactory level.</p>
Keywords biventricular bypass pusher-plate pump variable rate mode flow distribution
Amo Type Article
Published Date 1992-10
Publication Title Acta Medica Okayama
Volume volume46
Issue issue5
Publisher Okayama University Medical School
Start Page 317
End Page 321
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 1442154
Web of Science KeyUT A1992JX49500001