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Variation of venous admixture‚ SF6 shunt‚ Pa−O2‚ and the Pa−O2/F−IO2 ratio with F−IO2

Abstract:

Background. Measures of impairment of oxygenation can be affected by the inspired oxygen fraction.Methods. We used a mathematical model of an inhomogenous lung to predict the effect of increasing inspired oxygen concentration (FIO2) on: (1) venous admixture ((Q) over dotva/(Q) over dott); (2) arterial oxygen partial pressure (Pa-O2); (3) the Pa-O2/FIO2 index of hypoxaemia; and (4) sulphur hexafluoride (SF6) retention (often taken to be true right-to-left shunt). This model predicts whether or...

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Authors


JP Whiteley More by this author
DJ Gavaghan More by this author
Journal:
British Journal Of Anaesthesia
Volume:
88
Issue:
6
Pages:
771-778
Publication date:
2002-06-01
URN:
uuid:3bf564ef-e8d0-490e-8bf2-e1c5d611e172
Local pid:
cs:4271

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