与其他常见的儿科疾病比较 ,我们认识晚发型维生素Ｋ缺乏性出血 (ｌａｔｅｖｉｔａｍｉｎＫｄｅｆｉｃｉｅｎｃｙｂｌｅｅｄｉｎｇ)的历史还不长 ,８０年代初期这类疾病的报道才见诸文献［１］。晚发型维生素Ｋ缺乏性出血因其恶劣的预后正日益受到我国儿科界的关注。自１９８１ Compared with other common pediatric diseases, we have not seen a long history of late-onset vitamin K deficiency-forming bleeding. The reports of such diseases in the early 1980s were reported [1]. Delayed onset of vitamin K deficiency due to its poor prognosis of bleeding is increasingly the concern of our pediatric community. Since 1981