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乳糖吸收不良(LM)和乳糖不耐症(LI)是由乳糖酶缺乏(LD)所引起的。获得性 LD 与遗传有关;继发性 LD 与小肠粘膜损伤有关。虽然诊断 LD 最准确的方法是直接空肠粘膜活检法,然而乙醇乳糖耐量试验(LTTE)和乳糖呼气氢试验(LBHT)法也为较可靠的间接诊断法。对 LD 的治疗以减少和禁止含乳糖食品或使用乳糖替代品等为主要手段。
Lactose malabsorption (LM) and lactose intolerance (LI) are caused by lactase deficiency (LD). Acquired LD and genetic related; secondary LD and intestinal mucosal injury. Although the most accurate method of diagnosing LD is direct jejunal biopsy, the LTTE and LBHT methods are also more reliable indirect diagnostics. The treatment of LD to reduce and prohibit lactose-containing foods or the use of lactose substitutes as the main means.