Effect and mechanism of transcutaneous electrical acustimulation on postoperative recovery of lumbar spine: a randomized controlled trial

INTERVENTION: trial group:transcutaneous electrical acustimulation,TEA;control group:Sham transcutaneous electrical acustimulation; CONDITION: Gastrointestinal motility in patients after multi‐segmental lumbar spine surgery PRIMARY OUTCOME: time to first flatulence and time to defecation; SECONDARY OUTCOME: VAS pain scores of patients in the first 3 days after surgery;Gastrointestinal symptom score of patients in the first three days after surgery;Recovery Quality Scale scores of patients in the first three days after surgery;Incidence of complications such as postoperative intestinal obstruction and the need for medical treatment;time to resuming diet;hospital stay after operation;first time to ambulation;blood test indexes;gastric slow waves;heart rate variability; INCLUSION CRITERIA: 1.Willing to sign the informed consent form; 2.Age: >=18, regardless of gender; 3.Patients who proposed to undergo multi‐segment (>=2‐segment) lumbar spine surgery.