患者,男,30岁,工人。患龋牙4年,疼痛加剧10天。经本厂牙科医师治疗后,预约于1992年9月8日上午到门诊行龋牙摘除术。注射盐酸利多卡因2毫升(含4毫克)局麻,药液刚注完,患者突感头晕、胸闷,随即不省人事,脸色苍白、唇色青紫、大汗淋漓,双手轻度抽搐、脉沉细、血压7/3.5kPa,心律齐但 Patient, male, 30 years old, worker. 4 years suffering from dental caries, pain intensified 10 days. After the factory dentist treatment, appointment in the morning of September 8, 1992 to the clinic for caries removal surgery. Injection of lidocaine hydrochloride 2 ml (including 4 mg) of local anesthesia, liquid injection just finished, the patient suddenly felt dizzy, chest tightness, then unconscious, pale, lip color purple, sweating, his hands mild convulsions, pulse Subtle, blood pressure 7 / 3.5kPa, Qi Qi Qi