The effect of rectus muscle re-approximation at cesarean delivery on pain perceived after operation: a randomized control trial

摘要

Background: Cesarean section rate has increased dramatically worldwide but there is still debate about the optimum operative technique of cesarean section. Objective: The purpose of this study was to assess the effect of rectus muscle reapproximation at cesarean delivery on the postoperative pain. Methods: This study was a prospective, double-blind, randomized controlled trial. It included 280 primigravidas, with a singleton pregnancy, who underwent elective lower segment cesarean section at term. The patients were randomly allocated into two equal groups; Group (A): undergoing rectus muscle reapproximation, and Group (B): not undergoing rectus muscle reapproximation. Postoperative pain was assessed by visual analogue scale (VAS) from 0 (no pain) to 100 (maximum pain). Postoperative analgesia, operative time, changes in hemoglobin level, length of hospital stay, and occurrence of postoperative complication were also assessed. Results: Postoperative pain score at the end of the first 24 hours and at the end of the next 24 hours were significantly higher among the group of rectus muscle reapproximation (a difference in VAS pain score of: 5, 95% confidence interval: 0.1-11, p value: .02) and (a difference of 1, 95% confidence interval: 0.1-2.9, p value: .01), respectively. As regards the narcotic use in the first 24 hours after cesarean section, in the form of injections of meperidine 50 mg, it was significantly higher among the group of rectus muscle closure (a difference of 10 mg, 95% confidence interval 3-21.7 mg, p value: .02). While in the next 24 hours, the NSAIDs use, in the form of diclofenac sodium injection, was significantly higher among the group of rectus muscle reapproximation (a difference of 10 mg, 95% confidence interval 3.7-31.7 mg, p value: .02). Conclusions: Rectus muscle reapproximation among women undergoing primary caesarian section is associated with significant increase in the postoperative pain and analgesic requirements.