晚发性维生素 K 缺乏症,易导致严重出血倾向,特别是颅内出血,且常被误诊致严重后果,故应早期诊断,以期合理治疗。命名:本病命名尚未统一,有人称婴儿获得性维生素 K 依赖因子缺乏症、新生儿期后婴儿维生素 K 缺乏症、晚发性维生素 K 缺乏症、婴儿晚发性出血症等,笔者认为以晚发性维生素 K 缺乏症为好。病因:综合有以下可能: Late vitamin K deficiency, easily lead to severe bleeding tendency, especially intracranial hemorrhage, and often misdiagnosed as a serious consequence, it should be early diagnosis, with a view to reasonable treatment. Naming: The disease has not been named after the unity, some people claim that infant acquired vitamin K-dependent deficiency, neonatal vitamin K deficiency in infants, late onset of vitamin K deficiency, infantile bleeding, etc., I believe that late Hair vitamin K deficiency as well. Etiology: Synthesis has the following possibilities: