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J Appl Physiol 84: 1566-1572, 1998;
8750-7587/98 $5.00
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Vol. 84, Issue 5, 1566-1572, May 1998

Partial liquid ventilation improves gas exchange and increases EELV in acute lung injury

Paul G. Gauger, Michael C. Overbeck, Sean D. Chambers, Christine I. Cailipan, and Ronald B. Hirschl

Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan 48109

Gas exchange is improved during partial liquid ventilation with perfluorocarbon in animal models of acute lung injury. The specific mechanisms are unproved. We measured end-expiratory lung volume (EELV) by null-point body plethysmography in anesthetized sheep. Measurements of gas exchange and EELV were made before and after acute lung injury was induced with intravenous oleic acid to decrease EELV and worsen gas exchange. Measurements of gas exchange and EELV were again performed after partial liquid ventilation with 30 ml/kg of perfluorocarbon and compared with gas-ventilated controls. Oxygenation was significantly improved during partial liquid ventilation, and EELV (composite of gas and liquid) was significantly increased, compared with preliquid ventilation values and gas-ventilated controls. We conclude that partial liquid ventilation may directly recruit consolidated alveoli in the lung-injured sheep and that this may be one mechanism whereby gas exchange is improved.

body plethysmography; end-expiratory lung volume; oleic acid; partial liquid ventilation; perfluorocarbon


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