例１男，７个月。因急性胃肠炎在当地卫生室肌肉注射灭吐灵５ｍｇ、氨苄青霉素０．５ｇ，每天２次。第２天凌晨３时出现阵发性头后仰，两眼上翻，遂急诊入我院。查体：Ｔ３７℃，神清，呼吸平稳，前囟１．０ｃｍ×１．０ｃｍ、平坦，双瞳孔等大、等圆，光反射灵敏；颈无抵... Example 1 male, 7 months. Due to acute gastroenteritis in the local health room injection of methotrexate 5mg, ampicillin 0.5g, 2 times a day. At 3:00 on the second day there was paroxysmal head back, eyes turned up, then emergency department into our hospital. Physical examination: T37 ℃, Shen Qing, stable breathing, anterior fontanel 1.0cm × 1.0cm, flat, double pupil and so on, so round, light reflection sensitive;