Accuracy of mixed venous oxygen saturation in reflecting change in cardiac output during off-pump coronary artery bypass grafting
10.3760/cma.j.issn.0254-1416.2010.05.024
- VernacularTitle:混合静脉血氧饱和度反映非体外循环冠状动脉旁路移植术中CO变化的准确性
- Author:
Li ZHENG
;
Yu ZHEN
;
Ning MA
;
Guannan DING
;
Qingyuan HUAI
;
Jingdong KE
;
Ming TIAN
- Publication Type:Journal Article
- Keywords:
Oximetry;
Cardiac output;
Coronary artery bypass,off-pump
- From:
Chinese Journal of Anesthesiology
2010;30(5):589-591
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the accuracy of mixed venous oxygen saturation ( S(-v)O2 ) in reflecting the change in CO during off-pump coronary artery bypass grafting (OPCABG) .Methods Twenty-five NYHA Ⅰ -Ⅲ patients of both sexes, aged 50-75 yr, weighing 55-85 kg, undergoing OPCABG, were studied. Anesthesia was induced with midazolam, fentanyl, etomidate and pipecuronium and maintained with propofol infusion and intermittent iv boluses of fentanyl and pipecuronium supplemented with isoflurane if necessary. The patients were mechanically ventilated (VT 8-10 ml/kg, RR 8-10 bpm, I:E 1:2). PETCO2 was maintained at 35-45 mm Hg.Radial artery was cannulated and pulmonary catheter was placed. CI, S(-v)O2 and Hb were monitored and recorded before skin incision, during anastomosis with left anterior descending artery (LAD), right coronary artery (RCA)and left circumflex coronary artery (LCX), when the chest was closed, when the patients' body position was changed and the heart was manipulated. S(-v)O2 and CI were scaled immediately after the pulmonary artery catheter was placed and before anastomosing LAD. Results The CO change in S(-v)O2 was real-time and accurate in reflecting the body positioning and elevation of hearts. There was no simultaneous significant change in CI.Conclusion The CO change in S(-v)O2 is real-time and accurate in reflecting the body positioning and elevation of hearts during OPCABG.
