Objective:To observe the effect of polygeline in preventing hypotension and other side effects during combined epidural and spinal anesthesia(CESA) in cesarean section.

• 目的:观察麻醉开始时输注多聚明胶肽在剖宫产腰麻联合硬膜外麻醉(combined epidural and spinal anesthesia,CESA)中预防低血压等不良反应的效果。