Objective: We studied the trending ability and the correlation between central venous oxygen saturation (ScvO
2) and mixed venous oxygen saturation (SvO
2); they were measured concurrently by spectrophotometry. The purpose of this study was to determine whether ScvO
2 could be exploited as a hemodynamic monitor after the removal of a pulmonary artery catheter.
Methods: After arrival at the ICU, we measured and recorded ScvO
2 and SvO
2 continuously. We selected the pairs of ScvO
2 and SvO
2, which showed a value of 1 or 2 on signal quality indicator, and examined the trending ability and the correlation between the two.
Results: The data of 24 adult patients who underwent cardiac surgery were examined. As the result, the range of the coefficient of correlation was 0.12-0.85 and showed great dispersion between cases. And individual case had different bias. It was only 2 cases to have shown good trending ability.
Conclusions: Since the correlation between ScvO
2 and SvO
2 were different by cases respectively and there were few cases showing good trending ability, we should regard ScvO
2 as a hemodynamic index which was different from SvO
2.
View full abstract