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Comparison of venous sampling sites for intrapulmonary shunt determinations in the critically III patient

1973; Elsevier BV; Volume: 14; Issue: 4 Linguagem: Inglês

10.1016/0022-4804(73)90034-6

1095-8673

David E. Smith, Richard W. Virgilio, Cleve Trimble, Richard G. Fosburg,

Cardiovascular Function and Risk Factors

1.1. In patients without significant pulmonary dysfunction (Group I) Csvc O2 may be used in place of Cmv O2 in the calculation of the intrapulmonary shunt without significant error (P > 0.30). 2.2. In those patients with marked pulmonary insufficiency (Group II) shunts calculated on the basis of Csvc O2 are statistically different from those using Cmv O2. (P < 0.02). 3.3. There is relatively good correlation in both Group I and II between CV and PA as well as between ΔCV and ΔPA although the large standard error in Group II makes individual predictions difficult. 4.4. Unpredictable changes in regional venous blood flow and in venous oxygen content occur in many critically ill patients which may lead to gross miscalculation of the shunt. 5.5. Pulmonary arterial catheterization and sampling is necessary in those patients with marked pulmonary dysfunction to avoid errors in so that decisions regarding the clinical severity of the pulmonary insufficiency may be made.