Korean J Anesthesiol.  1987 Aug;20(4):540-544. 10.4097/kjae.1987.20.4.540.

Clinical Significance of Arterial/Alveolar Oxygen Tension Ratio as an Index of Prediction of New Arterial Oxygen Tension

Affiliations
  • 1Department of Anesthesiology, Kyunghee University School of Medicine, Seoul, Korea.

Abstract

To evaluate the sensitivity of the arterial/alveolar oxygen tension ratio as an index of rapid and simple method for predicting the new arterial oxygen tension at any fractional concentraion of inspired oxygen, smalle reviewed the arterial blood gab data obtained before and after an inspired oxygen concentration change from 16 mechanically ventilatedPatients. The results were as followa ; 1) There was no statistically difference between the predicted arterial oxygen tension 75+/-6 torr (mean+/-S. D.) and the obtained(actual) arterial oxygen tension 94+/- torr(mean+/-5.D) in the patient group wit? arteria1/alve7lar oxygen tension ratio change below 0.02 after the inspired oxygen concentration change (P>0.01) , 2) There was statistically signifioant difference between the predicte? arterial oxygen tension 105+/-7 torr(mean+/-S.D.) and the obtained(actual) arterial oxygen tension 91+/-6 terr (mean+/-S.D.) in the patient group with an arterial/alveolar oxygen tension ratio changeabove 0.06 after the inspired oxygen concentration change (P<0.05) . The analysis presented that the new arterial oxygen tension was acculately predicted by the equation if the arterial/alveolar oxygen tension ratio changed<0.02 after the inspired oxygen tension change and that poorly predicted if the arterial/alveelar oxygen tension ratio change> or =0.06 after the inspired oxygen tension change.


MeSH Terms

Humans
Oxygen*
Oxygen
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