Transcutaneous Electrical Acupoint Stimulation Accelerates the Recovery of Gastrointestinal Function after Cesarean Section: A Randomized Controlled Trial

Background. Gastrointestinal functional recovery is an important factor affecting postoperative outcome. The aim of this study was to evaluate the effect of transcutaneous electrical acupoint stimulation (TEAS) on gastrointestinal function in women undergoing cesarean section. Methods. 150 pregnant women undergoing cesarean section were randomly allocated into TEAS, nonacupoint stimulation (sham group), and no stimulation (control group). The primary outcome was indications of gastrointestinal functional recovery and the secondary outcomes included time to first mobilization, postoperative hospital stay, daily living activities at one week after surgery, postoperative side-effects, and serum levels of gastroenterological hormones. Results. The time to first flatus in TEAS group was significantly shorter compared to control (P=0.004) and sham groups (P=0.003). The time to first oral liquid and solid intake was significantly shorter than that in control (P<0.001; P=0.021) and sham group (P=0.019; P=0.037). Besides, postoperative hospital stay was shorter in TEAS group than in control group (P=0.031) and sham group (P<0.001). TEAS also promoted daily living activities (P=0.001 versus control group and P=0.015 versus sham group). Postoperative complications were similar among all the groups except for the incidence of abdominal distention 24 h after surgery (P=0.013; P=0.040). The motilin level was increased by TEAS (P=0.014 versus control group and P=0.020 versus sham group). Conclusion. TEAS accelerated gastrointestinal functional recovery after cesarean section, by reducing postoperative hospital length, and improved daily living activities after surgery. This effect was partially mediated by regulation of the gastroenterological hormones.