Preoperative sonographic sliding sign for prediction of intra-abdominal adhesions before repeat cesarean delivery

Objective To evaluate the usefulness of the uterine sliding sign for predicting intra-abdominal adhesions in women undergoing repeat cesarean section (CS) and the association of the sliding sign with other operative and neonatal outcomes. Methods A prospective cohort study was conducted among pregnant women with at least one previous CS. Transabdominal ultrasonography was performed and classified as a positive or negative sliding sign. Surgeons blinded to the sonographic results assessed intra-abdominal adhesions. The sensitivity, specificity, positive predictive value, and negative predictive value were calculated. Operative and neonatal outcomes of the positive and negative sliding sign groups were compared. Factors associated with intraoperative adhesions were also analyzed. Results A total of 380 women were recruited. The sensitivity and specificity of the uterine sliding sign to detect moderate-to-thick adhesions were 60.6% and 91.9%, respectively. A negative sliding sign was significantly associated with a higher incidence of adhesions, longer skin-to-delivery time, longer total operative time, and lower 5-min APGAR score in newborns. A negative sliding sign and history of two or more previous CS were significant predictors of moderate-to-thick adhesions. Conclusion The uterine sliding sign is an independent predictor of intraoperative adhesions, with acceptable sensitivity and high specificity and negative predictive value.