生后2周～1岁的婴儿因维生 K 缺乏致出血称为晚发性维生素缺乏症。1991年以来,我科收治22例分析报告如下。1 临床资料1.1 一般资料:年龄28天～6月,其中<20月20例。男17例,女5例,母乳喂养21例,混合喂养1例。发病前有腹泻史5例,上感史2例。1.2 临床表现:发热、尖叫、呻吟、嗜唾、拒食、呼吸浅表、眼睑下垂各1例,颈抵抗、精神萎糜、两眼凝 2 weeks after birth ~ 1 year old baby due to lack of vitamin K caused by bleeding known as late onset vitamin deficiency. Since 1991, our department received 22 cases of analysis as follows. 1 Clinical data 1.1 General Information: Age 28 days to 6 months, of which 20 cases in 20 months. 17 males and 5 females, 21 breastfeeding and 1 mixed feeding. Before the onset of a history of diarrhea in 5 cases, the sense of history in 2 cases. 1.2 Clinical manifestations: fever, screaming, moaning, addicted to saliva, antifeedant, superficial breathing, ptosis in 1 case, neck resistance, spiritual wilt, eyes condensate