ASSESSMENT OF THE EFFICIENCY OF PULMONARY OXYGENATION - THE CHOICE OF OXYGENATION INDEX
ASSESSMENT OF THE EFFICIENCY OF PULMONARY OXYGENATION - THE CHOICE OF OXYGENATION INDEX
复制标题
DOI：
10.1111/j.1399-6576.1988.tb02789.x
复制
发表时间：
1988-10-01
影响因子：
2.1
通讯作者：
ZETTERSTROM, H
中科院分区：
文献类型：
--
作者：
ZETTERSTROM, H
当不使用肺动脉导管时，氧衍生指数经常被用来替代静脉混合液(OVA/OVHDOT Qt)的测定，但关于哪一种更准确地指示氧合效率的问题存在争议。分析了6种氧合指标(PaO2、SaO2、P(A-a/O2、PaO2/FiO2、P(A-a)O2、PaO2/PaO2/PAO2)与静脉混合气的理论关系，特别是吸入氧浓度(FiO2)的影响。此外，基于100组真实的动脉和混合静脉血气数据，评估了.ovrhdot.Qva/.ovrhdot.Qt的可预测性。在上述6项指标中，PaO2/FiO2最准确(r=0.88)，但与所用FiO2无关。然而，静脉混合液(EVA)的直接估计-基于动脉血液分析和C(a-v)O2指定值为50毫升.cntdot。L-1预测的Qva/Ovrhdot.Qt仍较好(r=0.95)。结论：在缺乏混合静脉血气数据的情况下，EVA是较好的氧合指标。
Oxygen-derived indices are often used as alternatives to determination of venous admixture (.ovrhdot.Qva/.ovrhdot.Qt) when a pulmonary arterial catheter is not in use, but the question of which more accurately indicates the efficiency of oxygenation is controversial. The theoretical relationships between six measures of oxygenation (PaO2, SaO2, P(A-a/O2, PaO2/FIO2, P(A-a)O2, PaO2/PaO2/PAO2) and venous admixture were analyzed with special reference to the influence of the concentration of inspired oxygen (FIO2). In addition, the predictability of .ovrhdot.Qva/.ovrhdot.Qt was evaluated on the basis of 100 authentic sets of arterial and mixed venous blood gas data. Of the above six indices, PaO2/FIO2 was most accurate (r = 0.88), but was far from independent of the FIO2 used. However, a direct Estimate of Venous Admixture (EVA)-based on arterial blood analysis and with C(a-v)O2 assigned a value of 50 ml .cntdot. l-1 - predicted .ovrhdot.Qva/.ovrhdot.Qt still better (r = 0.95). It is concluded that when mixed venous blood gas data are lacking, EVA is the preferable measure of oxygenation.