病例介绍　一医学生 ,男 ,2 1岁 ,主诉有胃酸性消化性溃疡的症状 ,拟于门诊行食道、胃、十二指肠内镜检查。既往无吸烟史 ,无服麻醉药物史 ,无呼吸道疾病及心脏疾病史。术前一晚禁食 ,检查当天脉搏、血压及呼吸均正常。嘱其用 4%利多卡因溶液 2 0 ml(含利多卡因 80 0 mg)漱口 6 Case Description A medical student, male, 21 years old, complained of gastric acid peptic ulcer symptoms, intended for outpatient line of esophagus, stomach, duodenal endoscopy. No previous history of smoking, no history of narcotic drugs, no respiratory disease and heart disease history. One night before surgery fasting, check the pulse of the day, blood pressure and breathing are normal. Tend to use 4% lidocaine solution 20 ml (lidocaine 80 0 mg) gargle 6