Abstract
Alveolar and arterial gas tensions were measured in anesthetized dogs during a control period, after intravenous injections of a carbonic anhydrase inhibitor, and after rapid intravenous infusion of fat emulsion. These were carried out in sequence. The alveolar-arterial (A-a) Pco2 difference increased from about 6 mm Hg during the control to 26 mm Hg after carbonic anhydrase inhibition. A further increase took place after fat emulsion when the A-a Pco2 difference averaged 35 mm Hg. There was no increase in the A-a Po2 difference between carbonic anhydrase inhibition and fat emulsion. The additive increase in the A-a Pco2 difference strongly suggested that fat emulsion did not further interfere with the interconversion of CO2 and bicarbonate. Submitted on February 8, 1962
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