金××,男,9岁。因右下牙残冠要求拔除,于1992年5月21日下午来我科就诊。全身体检无异常发现,口腔内检查:残冠。否认有药物过敏史。术者用2％利多卡因3ml加1滴0.1％肾上腺素行左下齿槽神经、舌神经、颊神经传导麻醉。注射麻醉药2.5ml时患儿突然感到头晕,心慌,随后出现颜面部紫钳,呼吸困难,面部表情肌及四肢抽搐,口吐白 Gold × ×, male, 9 years old. Due to the removal of the crown of the right lower tooth residual crown, on the afternoon of May 21, 1992 to our department. No abnormal physical examination found, oral examination: residual crown. Denied a history of drug allergies. Surgery with 2% lidocaine 3ml plus 1 drop 0.1% epinephrine line lower left alveolar nerve, lingual nerve, buccal nerve conduction anesthesia. 2.5ml anesthetic injection when the child suddenly felt dizzy, palpitation, followed by facial pliers, breathing difficulties, facial muscles and limbs convulsions, vomiting white