目的：观察硬膜外阻滞对老年人上腹部手术氧供需平衡的影响。方法：选择上腹部手术硬膜外阻滞病人(年龄＞65岁)15例，ASAI～Ⅱ级，监测麻醉期间病人氧供量(DO2)、氧耗量(VO2)、氧摄取率(ERO2)、混合静脉血氧饱和度(SvO2)和动脉血乳酸含量(ABL)等指标动态变化的情况。结果：与麻醉前比较，老年病人麻醉诱导后至术毕30min，DO2、VO2、SvO2及ABL均无明显变化(P＞0.05)，而ERO2在手术开始后60min至术毕30min明显增高，并且在统计学上有显著或非常显著的意义(P＜0.05或P＜0.01)。结论：硬膜外阻滞对老年人上腹部手术氧供需平衡无明显影响，能维持术中良好的氧供需平衡。%Objective: To evaluate the effects of epidural anesthesia on oxygen delivery and consumption balance in geriatric patients undergoing major abdominal surgery. Methods: To select fifteen patients with epidural anesthesia, more than 65 years, ASA class Ⅰor Ⅱ, undergoing major abdominal surgery and monitor the dynamic changes of oxygen delivery (DO2),oxygen consumption (VO2), oxygen extraction rate (ERO2), mixed venous oxygen saturation (SvO2), and arteral blood lactate (ABL). Results: from anesthesia induction to the end of operation, there were not any different changes in DO2, VO2, SvO2,ABL compared with those before anesthesia (P＞0.05). But ERO2 increased significantly from 60 minutes after the start of operation to 30 minutes after operation (P＜0.05, or P＜0.01). Conclusions: Epidural anesthesia has no adverse effects on oxygen delivery and consumption balance in geriatric patients undergoing major abdominal surgery.
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