黄疸是由于血浆胆红素含量增高,超过2毫克%(高胆红素血症)而致胆红素在皮肤、粘膜、巩膜、体液等处广泛沉着使其黄染的一种体征。胆红素主要来源于血红蛋白,其代谢过程涉及从血红蛋白解裂产生,经肝脏处理,随胆汁入肠,肠肝循环和排出体外等多个环节。在正常情况下,胆红素的形成、排出处 Jaundice is a sign of the widespread yellowing of bilirubin at the skin, mucous membranes, sclera, body fluids, etc., due to an increase in plasma bilirubin levels exceeding 2 mg% (hyperbilirubinemia). Bilirubin mainly comes from hemoglobin, its metabolic process involves the production of hemoglobin cleavage, the liver treatment, with the bile into the intestine, enterohepatic circulation and excreted in vitro and other links. Under normal circumstances, the formation of bilirubin, discharge Department