为避免婴儿晚发性维生素Ｋ缺乏症的发生，现对晚发性维生素Ｋ缺乏症１８例进行分析，并提出对所有新生儿生后常规补充维生素Ｋ，以预防本病发生。临床资料 一、一般资料近２ ａ来的住院病人 １８例，男 １１例，女７例。起病年龄：２５ ｄ～５个月，其中 ? In order to avoid the occurrence of late-onset vitamin K deficiency in infants, 18 cases of late onset vitamin K deficiency are analyzed, and all newborns are suggested to be supplemented with vitamin K routinely to prevent the occurrence of this disease. Clinical data First, the general information of nearly 2 a inpatient 18 cases, 11 males and 7 females. Age of onset: 25 d ~ 5 months, of which?