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Japanese

Hemodynamic study of negative pressure ventilation using diaphragm pacing Fumihiko Yasuma 1 , Hideo Nomura 1 , Syozo Ogawa 1 , Kazuhiko Miyaguchi 1 , Goro Narita 1 , Yoshiyuki Hama 1 , Hiroshi Hayashi 1 , Iwao Sotohata 2 1First Department of Internal Medicine, Nagoya University School of Medicine 2Department of Internal Medicine, Fujita-Gakuen Health University School of Medicine pp.977-981
Published Date 1989/9/15
DOI https://doi.org/10.11477/mf.1404205543
  • Abstract
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A negative pressure ventilation (NPV) by unila-teral or bilateral diaphragm pacing (DP) was pre-pared for canine experiments.

A shift from positive pressure ventilation (PPV) to NPV resulted in elevation of mean aortic pressure, increase in stroke volume and depression of mean pulmonary arterial pressure.

Examination of the interaction between respirato-ry cycle and cardiac function during PPV, disclosed a reduction of right ventricular stroke volume and elevation of mean aortic and right ventricular end-diastolic pressure at end inspiration, compared to those at end expiration. During NPV with DP, left ventricular stroke volume, heart rate and mean aortic pressure were increased immediately after DP (im-mediately after inspiration) compared to those at end expiration.

The experimental model of DP, in which respirato-ry condition could be easily altered, was considered to be useful to evaluate the effect of NPV on cardiac function.


Copyright © 1989, 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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