Pulmonary Shunting during Venovenous Bypass
Using mongrel dogs, an experimental study was performed to investigate Qs/Qt during v-v bypass with or without oxygenation. During bypass, the systemic circulation was maintained under constant conditions, while bypass flow rate, Svo2 and Pvco2 varied independently. The results were as follows: 1) I...
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Veröffentlicht in: | Japanese Heart Journal 1982, Vol.23(5), pp.759-770 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Using mongrel dogs, an experimental study was performed to investigate Qs/Qt during v-v bypass with or without oxygenation. During bypass, the systemic circulation was maintained under constant conditions, while bypass flow rate, Svo2 and Pvco2 varied independently. The results were as follows: 1) In dogs undergoing v-v bypass without oxygenation, Qs/Qt and A-aDO2 increased markedly in proportion to bypass flow in animals receiving blood infusion into the right ventricle, but a remarkable increase was not seen in animals receiving blood infusion into the right atrium. The pulmonary artery waveform appeared to influence Qs/Qt. 2) A significant positive correlation was found between Qs/Qt and Svo2. A-aDO2 showed no correlation to Svo2. 3) The Qs/Qt showed no remarkable changes despite significant changes in Pvco2 (from 22 to 96mmHg). 4) With regard to Qs/Qt and Svo2, it may be proper to perform v-v bypass at a flow rate of 30ml/Kg/min with blood infusion into the right atrium. |
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ISSN: | 0021-4868 1348-673X |
DOI: | 10.1536/ihj.23.759 |