Transcutaneous Electrical Acupoint Stimulation on Gastrointestinal Function After Cesarean Section

According to ancient Chinese medical books, acupoints SP6 and ST36 are chosen and identified.The patients in TEAS group received electrical stimulation with the 'disperse-dense' waves. Non-acupoint is located 2cm interior to the ST36 and SP6.For group TEAS and Sham, TEAS will be administered 30 minutes prior to surgery and continued until the end of the surgery.Control patients will receive the same treatment without electrical stimulation.