Walker M P, Farine D, Rolbin S H, Ritchie J W
Department of Obstetrics and Gynecology, Mount Sinai Hospital, Toronto, Ontario, Canada.
Obstet Gynecol. 1991 May;77(5):668-71.
The relationships among epidural anesthesia, forceps use, parity, episiotomy, and laceration were studied in 9493 uncomplicated vertex deliveries of spontaneous onset and normal course. The use of epidural anesthesia was not associated with an increased incidence or severity of birth-canal trauma. Episiotomy was associated with a decreased rate of perineal laceration, but an overall increase in the rate of perineal trauma. The trauma that did occur with episiotomies was four times more likely to be major than that when no episiotomy was performed.
在9493例自然发动且产程正常的无并发症头位分娩中，研究了硬膜外麻醉、产钳使用、产次、会阴切开术和裂伤之间的关系。硬膜外麻醉的使用与产道创伤的发生率增加或严重程度无关。会阴切开术与会阴裂伤率降低相关，但会阴创伤率总体增加。进行会阴切开术时发生的创伤比未进行会阴切开术时发生重大创伤的可能性高四倍。
