英语语法分析

Objective:To observe and compare the influence of two different anesthesias on the homodynamic and awakening time of patients over 60 receiving thoracic surgery.

目的：比较单纯全麻和硬膜外复合全麻在60岁以上老年患者开胸手术中对患者血流动力学和苏醒时间的影响。