Effect of Neiguan-Waiguan penetrating needle method on hemodynamics and postoperative nausea and vomiting during anesthesia induction

INTERVENTION: Tropisetron group:Tolansetron 5mg was intravenously injected before anesthesia;Esmolol group:Esmolol 20mg was given intravenously before anesthesia;Control group:2ml of normal saline was injected before anesthesia;Acupuncture group:Neiguan pierced to Waiguan before anesthesia; CONDITION: Perioperative blood pressure, heart rate, nausea and vomiting PRIMARY OUTCOME: Changes in hemodynamics; SECONDARY OUTCOME: pain score;Nausea and vomiting; INCLUSION CRITERIA: Heart and lung functions were normal, no history of drug use, no history of long‐term opioid use, and tolerance to surgical anesthesia