丁卡因是应用广泛的粘膜表面麻醉剂，它效力强，约为普鲁卡因１０倍。丁卡因虽然比较安全，但毒性反应仍有发生，重者可致死亡。微量丁卡因引起中毒反应临床较少见，现报告１例如下。患者，男性，４９岁。１９９７年４月２４日晚，一飞虫入右耳即感耳痛、耳鸣及耳搔动感，... Tetracaine is a widely used mucosal surface anesthetic, which is very potent and about 10 times as much as procaine. Although tetracaine is safer, toxic reactions still occur, and severe cases can cause death. Trace toxic effects of tetracaine clinical response is rare, a report is as follows. Patient, male, 49 years old. April 24, 1997 evening, a flying insects into the right ear that earache, tinnitus and ear scratching movement, ...