Anesthetics induce dose-dependent reduction in blood pressure in clinical situation, and direct vasodilation by anes-thetics is one of causes which induce hypotension. 全身麻醉药在临床上常引起剂量依赖性血压下降,直接扩血管作用是其诱发低血压的重要原因之一。
Ultrasound guidance in PNB represents a new advancement and development in regional anes-thesia. 超声引导周围神经阻滞代表了区域阻滞麻醉的新进展。