Effects of Transcutaneous Acupoint Electrical Stimulation on Intestinal Obstruction After Gastrointestinal Surgery

Participants will be randomly assigned, in a 1:1 ratio, to receive TEAS or Blank treatment (acupoints selection are same with the experimental group, connect stimulator for patients, but not don't give stimulus). The randomization sequence will be computer-generated, and randomization will be performed in blocks and will be stratified according to participating center. TEAS will be performed in a series of time periods after operation. Time of first fart and food-taking ,time of have normal diet after the transplantation will be recorded. The participation of each patient is scheduled for 30 days.