Abstract
Aim: Prolonged oxytocin infusion during labor results in receptor desensitization and increases the risk of obstetric hemorrhage. We aimed to examine the association between recovery time (RT) and intraoperative severe blood loss in women who underwent a cesarean section after oxytocin pretreatment.Methods: We retrospectively assessed 103 Japanese women who underwent cesarean section after oxytocin pretreatment. RT (time from cessation of oxytocin infusion during labor to delivery) and intraoperative severe blood loss (active bleeding exceeding 1000 mL) were measured. Confounding factors were controlled, and RT cut-off value associated with severe blood loss and association between RT and intraoperative severe blood loss were assessed.Results: The mean maternal age was 34 years, and 100 (97.1%) women delivered at term. Mean RT was 121.6 min. The overall incidence of intraoperative severe blood loss was 22.3% (23/103). The cut-off point to predict intraoperative severe blood loss was 96 min (sensitivity, 65.2%; specificity, 81.3%). On multivariate analysis, an RT of ≤96 min [adjusted odds ratio (OR), 11.9; 95% confidence interval (CI), 3.32–42.7] and macrosomia (adjusted OR, 3.91; 95% CI, 1.10–13.8) were associated with intraoperative severe blood loss.Conclusions: Consideration of RT is helpful in the management of women undergoing cesarean section after oxytocin pretreatment.
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