采用脉冲多普勒和M型超声心动图技术,对正常分娩时硬膜外麻醉期间母体、子宫、胎盘及胎儿的血流动力学改变进行研究。血流动力学参数测定分三个阶段进行,即静脉内液体负荷前,静脉内液体负荷(10ml/kg)后和硬膜外麻醉(0.25％布比卡因)后。研究对象为14例初产妇,12例完成研究,余2侧因其他原因被排除。 The hemodynamic changes of maternal, uterine, placenta and fetus during epidural anesthesia during normal labor were studied by pulsed Doppler and M-mode echocardiography. The hemodynamic parameters were measured in three phases: before intravenous fluid loading, after intravenous fluid loading (10 ml / kg) and after epidural anesthesia (0.25% bupivacaine). Study of 14 cases of primipara, 12 patients completed the study, the remaining 2 sides were excluded due to other reasons.