Effect of percutaneous electrical stimulation of acupuncture points on perioperative protein levels in patients with colorectal cancer

Interventions: Transcutaneous electrical acupoint stimulation group :Transcutaneous electrical stimulation was given at the bilateral Hegu, Neiguan, Feet Three Miles, Upper Juxu, Lower Juxu, and Sanyinjiao points 1 day before, during, and 1, 2, and 3 days after surgery, respectively ;False stimulus group :The electrode pads were selected to be attached at the same acupuncture points as in group A, but not energized, i.e., no current stimulation was given to the patients. Primary outcome(s): Changes in protein-related indexes (total protein, albumin, prealbumin, transferrin) at 1, 3 and 7 days postoperatively Study Design: Parallel