小肠吸收不良是指小肠的消化、吸收功能分别或同时受损,以致肠腔内的营养物质不能顺利透过肠粘膜转运入组织,而大量从粪便中排泄,引起营养缺乏的临床表现。由于小肠吸收不良病例有腹泻,粪便稀薄,量多,油腻多脂,症状产生与脂肪吸收障碍有关,故称为“脂肪泻”。小肠粘膜有许多独特的形态和功能特点,有利于营养物质的吸收。小肠粘膜有 Small intestine malabsorption refers to the digestion and absorption of the intestine, respectively, or impaired at the same time, resulting in intestinal nutrients can not be smoothly transported through the intestinal mucosa into the organization, and a large number of excretion from the feces, causing nutritional deficiencies in clinical manifestations. Due to poor absorption of small intestine cases of diarrhea, thin stools, quantity, greasy fat, symptoms and fat absorption disorders, it is called “steatorrhea.” Small intestinal mucosa has many unique morphological and functional characteristics, is conducive to the absorption of nutrients. Small intestinal mucosa