Influence of varying inspired oxygen tensions on the pulmonary venous admixture (shunt) of mechanically ventilated patients
作者:
A. OLIVEN,
E. ABINADER,
S. BURSZTEIN,
期刊:
Critical Care Medicine
(OVID Available online 1980)
卷期:
Volume 8,
issue 2
页码: 99-101
ISSN:0090-3493
年代: 1980
出版商: OVID
数据来源: OVID
摘要:
Pulmonary venous admixture (shunt) was measured in 10 mechanically ventilated patients with respiratory failure at varying oxygen tensions. All patients manifested a drop in pulmonary shunt as FIO2was increased from 0.21 to 0.4. Further increase in FIO2led to a gradual increase in the calculated venous admixture. The clinical significance of the conventional measurements of pulmonary shunt at FIO2= 1.0 is questionable because of the marked effect of FIO2on pulmonary shunt. Consequently, shunt measurements should be performed with the clinically useful FIO2.
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