Background:
@EN Although mixed venous oxygen saturation(SvO2) has been established as a useful measure of whole body oxygenation, SvO2 must be measured through a pulmonary artery(PA) catheter. We performed this study to evaluate whether central venous oxygen
saturation(ScvO2) could substitute for SvO2 and whether SvO2 reflects cardiac output.
@ES Methods:
@EN Twenty five patients were studied. Thirteen patients(GA Group) had PA catheters inserted during general anesthesia, and twelve(ICU Group) patients in the intensive care unit had PA catheters inserted for management of critical illnesses. In
each
patients, blood samples for SvO2 and ScvO2 were drawn separately from the PA and CVP ports of PA catheter, and cadiac index(CI) was measured.
@ES Results:
@EN Mean ScvO2 was significantly higher than SvO2 in both group, but the difference of SvO2 and ScvO2 were only about 2.5%. Correlations of SvO2 and ScvO2 were very high in GA and ICU Groups(r=0.92, 0.95k, respectively). SvO2 was weakly related
to
CI in
GA Group(r=0.64), and in ICU Group(r=0.50)
@ES Conclusions:
@EN We conclude that ScvO2 can be a useful estimate of SvO2, but SvO2 does not reliably reflect cardiac index. (Korean J Anesthesiol 1996; 30: 724~732)
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