患者,女,30岁。双眼因患病毒性角膜炎,用2%利多卡因作为结膜下注射前表面麻醉剂。药液点入眼内2～3分钟后病人出现口干、全身搔痒,面部潮红。5分钟后出现四肢发凉、大汗淋漓,继之晕倒在床不省人事。体查:结膜充血、瞳孔对光反应迟钝,血压60/40mmHg,脉快细弱,全身布满片状皮疹,边界清,以面部明显。诊断:过敏性休克。立即给皮下注射1∶1000肾上腺素1ml,地塞米 Patient, female, 30 years old. Eyes due to viral keratitis, with 2% lidocaine as a subconjunctival topical anesthetic injection. Liquid into the eye 2 to 3 minutes after the patient appeared dry mouth, systemic itching, facial flushing. 5 minutes after the emergence of cold limbs, sweating, then fainted unconscious in bed. Physical examination: Conjunctival hyperemia, pupil light reaction slow, blood pressure 60 / 40mmHg, pulse fast weak, full body covered with sheet rash, border clear to the obvious. Diagnosis: Anaphylactic shock. Subcutaneous injection immediately 1: 1000 epinephrine 1ml, dexamethasone