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90％的健康新生儿生后第一周出现黄疸,这种黄疸是暂时性、自限性的而且完全是良性的现象。另一方面,在相同的年龄,血清胆红素浓度高于20mg/dl(340μmol/l)的严重黄疸可能引起脑损伤而需紧急处理的全身性疾病如溶血性贫血、尿道感染、甲状腺功能亢进、半乳糖血症、肝脏疾病或胆道闭锁可能使生理性黄疸恶化。有下列五种情况时需做进一步检查。第一,是出生后24小时内出现黄疸。这常表明具有严重贫血或脑损伤极大危险性的严重溶血过程。第二,有其他疾病的新生儿黄疸,这可能意味着婴儿喂养差,出现过度嗜睡或肌张力低或
Jaundice occurs in the first week after birth in 90% of healthy newborns, which are transient, self-limiting and perfectly benign. On the other hand, severe jaundice with a serum bilirubin concentration higher than 20 mg / dl (340 μmol / l) at the same age may cause general brain diseases such as hemolytic anemia, urinary tract infection, hyperthyroidism , Galactosemia, liver disease or biliary atresia may aggravate physiological jaundice. In the following five cases need further examination. First, there is jaundice within 24 hours after birth. This often indicates severe haemolysis with severe risk of severe anemia or brain damage. Second, neonatal jaundice with other illnesses may mean poor infant feeding, excessive sleepiness or low muscle tone or