本综合征临床上系指由于摄取普通量的乳糖而引起腹痛、腹鸣、腹胀以及腹泻等症状,从生化学定义看系指肠粘膜的乳糖分解酶活性缺陷或低下的状态。一、生理生化学乳糖分解酶存在于小肠粘膜细胞表面的刷状边缘,其作用机制与乳糖消化有关,即将乳糖水解为葡萄糖和半乳糖二种单糖,使机体易于吸收。经口的活组织检查取得小肠粘 The syndrome in clinical means due to the normal intake of lactose caused by abdominal pain, abdominal pain, abdominal distension and diarrhea and other symptoms, from the biochemical definition refers to the intestinal mucosa lactase activity defects or low status. First, the physiological and biochemical lactase enzymes exist in the brush border of the intestinal mucosal cell surface, its mechanism of action and lactose digestion, lactose hydrolysis is about to glucose and galactose two kinds of monosaccharides, the body easy to absorb. Oral biopsy made small intestinal sticky