Efficacy of TEAS on Postoperative Pain and Recovery in Patients Undergoing Hepatectomy

This study tests whether transcutaneous electrical acupoint stimulation (TEAS) — a non-invasive technique that applies gentle electrical stimulation to acupuncture points on the skin — can reduce pain and improve recovery after liver resection surgery (removal of part of the liver). **You may be eligible if...** - You are 18 to 80 years old - You are scheduled for planned (elective) liver resection surgery - Your overall health status is classified as ASA I, II, or III (relatively fit for surgery) **You may NOT be eligible if...** - You have a history of epilepsy - You have a skin rash or infection over the acupoint stimulation sites - You are pregnant or breastfeeding - You have a mental health condition, intellectual disability, or neurological disorder - You are unable to rate your pain on a numeric scale - You have a cardiac pacemaker, defibrillator, or cardioverter implanted - You use opioid pain medications chronically - You have cancer that has spread to other organs Talk to your doctor to see if this trial is right for you.