腰麻一度被认为是剖宫产麻醉禁忌。其理由:首先腰麻易致母体低血压,从而减少子宫胎盘血流灌注,母体低血压持续5min即可导致胎儿体内酸中毒。其次,产妇呼吸以胸式呼吸为主,呼吸代偿能力极差,腰麻用于剖宫产极易导致高平面麻醉,抑制呼吸。使SpO2下降,因而认为腰麻用于剖宫产安全 Spinal anesthesia was once considered contraindication of cesarean section. The reason: First, spinal anesthesia easy to cause maternal hypotension, thereby reducing uterine placental perfusion, maternal hypotension for 5min can lead to fetal acidosis. Second, maternal respiratory to chest-based breathing, poor respiratory compensatory capacity, spinal anesthesia for cesarean section can easily lead to high plane anesthesia, inhibition of breathing. So SpO2 decreased, so that spinal anesthesia for cesarean section safety