Measurement of mixed venous oxygen saturation (svo2) in high risk cardiac surgery patient

Duc Hoang Doan, Hung Phu Cao, Luong Tat Nguyen

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Tóm tắt

Our study included 112 high risk patients undergoing cardiac surgery in our hospital. Their postoperative hemodynamic parameters were monitored in short intervals using a Swan-Ganz catheter. A ROC curve of SO2 was plotted based on the collected data to evaluate its prognostic performance for patient early postoperative outcome and probability of dying within 30 days after surgery. Results: The best cut-off SO2 value for predicting post-operative complications related to heart failure and the probability of dying within 30 days after surgery in high risk cardiac sugery patients was 55% with a sensitivity of 91.18% and specificity of 31.82%. No death was reported in this study. Conclusions: A SO2value < 55% at the time of admission to ICU indicates poor prognosis for high-risk cardiac surgery patients and more aggressive treatment is required accordingly. This finding is consistent with the results from several studies on patients undergoing surgery for coronary artery disease.

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