Abstract:Objective To investigate the effects of carbetocin on postpartum hemorrhage, coagulation indexes and prognosis of pregnancy in the scarred uterus after cesarean section.Methods A total of 182 pregnant women with scarred uterus who underwent cesarean section in Hubei Maternity and Child Health Care Hospital were divided into carbetocin group and oxytocin group. After the delivery of fetus, the pregnant women in the carbetocin group were injected with carbetocin, and those in the oxytocin group were given oxytocin. The coagulation index, bleeding volume, and stress index before and after operation, postoperative myometrial thickness, and the adverse reaction rate were compared between the two groups.Results The amount of bleeding during operation, 2 hours after operation and 24 hours after operation in the carbetocin group was less than that in the oxytocin group (P <0.05). After operation, the level of malondialdehyde (MDA) in carbetocin group was lower than that in oxytocin group, while superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) were higher than those in oxytocin group (P < 0.05). The changes of coagulation indexes in the carbetocin group were greater than those in the oxytocin group (P < 0.05). The postoperative myometrial thickness of pregnant women in carbetocin group was greater than that in oxytocin group (P < 0.05). There was no significant difference in the rate of adverse reactions between the two groups (P > 0.05).Conclusions Carbetocin can effectively reduce the amount of bleeding, alleviate stress response, improve coagulation function, and increase the thickness of myometrium in pregnant women with scarred uterus undergoing cesarean section, but it does not increase the rate of adverse reactions, which is worthy of further clinical application.