一、会阴裂伤根据会阴及阴道撕裂程度,会阴裂伤可分为四度: (一)Ⅰ度裂伤:指阴唇系带、会阴皮肤及阴道下段粘膜有撕裂,但未达肌层。出血不多,缝合后可以很快愈合。 (二)Ⅱ度裂伤:会阴皮肤裂伤已达会阴体肌肉,但未损伤肛门括约肌。此类裂伤多累及阴道后壁粘膜,有时延至阴道后壁两侧沟,使阴道下段后壁 First, the perineal laceration According to the degree of perineal and vaginal tear, perineal laceration can be divided into four degrees: (A) I degree laceration: refers to the labia lace, perineal skin and lower vaginal mucosa tear, but not the muscle . Small bleeding, suture can heal quickly. (B) Ⅱ degree laceration: perineal skin laceration has reached the perineal muscle, but did not damage the anal sphincter. Such laceration involving the vaginal wall mucosa, and sometimes extended to both sides of the posterior vaginal groove, so that the lower vaginal wall