Abstract: Objective To investigate the effect of perioperative transcutaneous electrical acupoint stimulation on postoperative gastrointestinal function in patients with colorectal cancer by meta-analysis. Methods PubMed,Embase,the Cochrane Library,Web of Science,China Biomedical Literature Database,Wanfang Data Knowledge Service Platform,China National Knowledge Infrastructure,VIP database were electronically searched to collect randomized control trials on the effects of perioperative transcutaneous electrical acupoint stimulation on postoperative gastrointestinal function recovery in colorectal surgery patients from inception of database to June 2022. Two reviewers with evidence-based nursing training independently screened the literature according to the inclusion and exclusion criteria,extracted data,and evaluated the quality, and then performed meta-analysis by Stata14.0 software. Results A total of 14 literature were included,involving 1 560 patients.The results showed that transcutaneous electrical acupoint stimulation could accelerate the recovery of bowel sounds[WMD=-9.58,95%CI（-12.30,-6.88）,Z=6.94,P<0.001] and shorten the time of anal exhaust[WMD=-12.35,95%CI（-15.58,-9.12）,Z=7.49,P<0.001],reduce the incidence of nausea and vomiting[RR=0.46,95%CI（0.32,0.66）,Z=4.18,P<0.001],accelerate the time of first defecation[WMD= -15.51,95%CI（-22.16,-8.86）,Z=4.57,P<0.001],shorten hospitalization days[WMD=-1.64,95%CI（-2.75,-0.54）,Z=2.92,P=0.004]. However,there was no significant difference in the incidence of intestinal obstruction[RR=0.62,95%CI（0.26,1.45）,Z=1.11,P=0.27]. Conclusion Transcutaneous electrical acupoint stimulation can promote the recovery of gastrointestinal function in patients with colorectal cancer after surgery. However,there is no consensus on the selection of acupoints,intervention timing,frequency,and the selection of parameters of transcutaneous electrical acupoint stimulation instrument,which needs to be validated by further high-quality clinical studies.

Key words: Perioperative Period, Colorectal Neoplasms, Transcutaneous Electrical Acupoint Stimulation, Gastrointestinal Function, Meta-Analysis