Abstract:Objective To investigate the application effect of modified perineum evaluation scale in primiparas with dystocia receiving restrictive episiotomy (RE) in vaginal delivery.Methods A total of 162 primiparas with dystocia at vaginal delivery were recruited from January 2019 to December 2021 in the obstetrics department of Nanjing Drum Tower Hospital. Sixty primiparas received modified perineum assessment scale in 2020 were designed as observation group, and 102 primiparas with routine perineum lateral episiotomy before low position forceps for delivery in 2019 were served as control group. The bleeding volume during 24 hours after delivery, degree of perineal laceration, perineal pain, hospital stay, maternal early ambulation activities, urine retention and newborn infants early sucking were compared between two groups. Results There were 102 cases of degree Ⅱ perineal laceration in control group and 58 cases without undergoing perineum incision, 57 cases of degree I perineal laceration and 3 cases of grade Ⅱ perineal laceration in observation group, with the statistical differences between two groups（P<0.01）. The 24 h bleeding volume［(629.33±196.97)ml vs (289.15±380.19)ml］, the perineal pain score (3.65±1.45 vs 1.91±0.88), the incidence of urinary retention (20.59% vs 6.70%)and the length of hospital stay［(5.81±3.23) d vs (3.28±1.17) d］ in control group were significantly higher than those in observation group （P<0.05）,and the number of parturient with early ambulation in control group was statistically lower than that in observation group(80.39% vs 93.33%, P＜0.05).Conclusions For the primiparas with dystocia, modified perineum evaluation scale with restrictive episiotomy can effectively improve the conventional lateral incision mode, reduce the incidence of the postpartum hemorrhage and promote the healing of perineal wounds and the recovery of postpartum mothers.