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最近维生素K缺乏及预防再度引起国际学术界的重视,并开展了相应的研究,因为由于维生素K缺乏造成出血在纯母乳喂养儿中占极大比例,此种出血致死率高,后遗症棘手,不仅影响存活儿的生理健康,而且累及日后智力发育和行为发展,引发一系列社会问题,所以,这也是推广母乳喂养、创建爱婴医院必需加以解决的问题.生后2周至1岁的婴儿由于维生素K(Vk)缺乏而致出血称为晚发性Vk缺乏症,1980年日本报告了晚发性婴儿Vk缺乏出血病发生率为1/4000,其中87％的患儿为单纯母乳喂养儿.国内近些年来也有大量病历报道此病.发展中国家此病发生率估计为0.6～3/1000,其中单纯母乳喂养儿占87～98％.
Recently, the lack of vitamin K and prevention have once again attracted the attention of international academic circles, and the corresponding research has been carried out because bleeding due to vitamin K deficiency accounts for a large proportion of exclusively breastfeeding children. Such hemorrhage mortality is high and the after-effects are difficult. Not only Affecting the physical health of surviving children, but also involves the development of intellectual and behavioral development in the future, triggering a series of social problems, therefore, it is also necessary to solve the problem of promoting breastfeeding and creating a baby-friendly hospital.Since birth 2 weeks to 1 year old infants due to vitamins Lack of K (Vk) causes bleeding called late-onset Vk deficiency, and in 1980 Japan reported an incidence of 1 in 4,000 Vk-deficient hemorrhage in late-onset infants, 87% of whom were exclusively breastfed In recent years, there are also a large number of medical records of the disease.The incidence of the disease in developing countries is estimated at 0.6 ~ 3/1000, of which only breastfeeding children accounted for 87 ~ 98%.