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维生素 K缺乏症亦称获得性凝血酶原降低症 ,是由于维生素 K的摄入或吸收不足 ,及肝脏功能障碍不能利用维生素 K合成凝血酶原所致。发生在出生后 1～ 3个月婴儿的维生素 K缺乏症 ,称为晚发性维生素 K缺乏症 ,常早期发生颅内出血 ,起病突然 ,病情来势凶猛 ,病死率高 ,存活者多有
Vitamin K deficiency, also known as acquired prothrombin lowering, is due to inadequate intake or absorption of vitamin K, and liver dysfunction can not be caused by the use of vitamin K for the production of prothrombin. Occurred in 1 to 3 months after birth, vitamin K deficiency in infants, known as late onset of vitamin K deficiency, often early onset of intracranial hemorrhage, sudden onset, the disease fierce, high mortality, survivors and more