冠脉搭桥手术病人的心脏指数和混合静脉血氧饱和度的相关性研究

目的：对８５例接受３￣５根冠脉搭桥手术病人测得的围术期混合静脉血氧饱和度和心脏指数（ＣＩ）等血流动力学指标进行统计学分析，探索其相关性。方法：采用有光纤的５腔肺动脉漂浮导管，分别在六个时相采取血流动力学参数；麻醉前基础值，气管插管后５分钟，锯开胸骨后，体外循环停机后，术后６和２４小时。结果：ＳｖＯ２与ＣＩ在各时相无显著改变或高于术前水平。各时相ＳｖＯ２和ＣＩ与对照值之差间显示较好的相关性。结论：

Correlation between Mixed Venous Oxygen Saturation and Cardiac Index in Coronary Arterty Bypass Grafting Patients

Objective:Cardiac index(CI) and mixed venous oxygen saturation(SO 2) were studied in 85 patients undergoing coronary artery bypass grafting(CABG).Methods:Measurement of CI and SO 2 was carried out with a fiberoptic ballon tip thermodilation pulmonary artery catheter.Fentanyl based anesthesia was applied in all patients.Hemodynamic parameters were obtained prior to anesthesia induction as the baseline,after endotracheal intubation,after sternotomy,after weaning of cardiopulmonary bypass,at 6 and 24h after operation.Results:CI and SO 2 increased or was not changed at all time intervals,compared with the baselines.The changes of SO 2 correlated well with those of CI.Conclusion:The results suggest that continuous monitoring of SO 2 may be useful to predicting alteration in CI in patients undergoing CABG.