The effect of transcutaneous electrical acupoint stimulation on postoperative sleep in patients with breast cancer surgery: a single-center, single blind, prospective, randomized controlled, superior clinical study

INTERVENTION: negative control group:electrical stimulation at percutaneous non‐acupoint;Test group:electrical stimulation at percutaneous acupoint ; CONDITION: postoperative sleep PRIMARY OUTCOME: Incidence of sleep disorder; SECONDARY OUTCOME: VAS pain grade;Incidence of postoperative nausea and vomiting;Incidence of local discomfort after electrical stimulation; INCLUSION CRITERIA: 1. Female patients undergoing breast cancer surgery; 2. BMI 18‐30 kg/m2; 3. Aged 18‐65 years; 4. ASA grade I‐II; 5. Patients who agreed to sign the informed consent form.