1病例资料患儿,女,1岁2个月,腹泻3个月余。大便7~8次/天,量多,为黄色水样便,无黏液血丝;无发热、抽搐。当地医院多次就诊,查血钾低至1.27 mmol/L,给予抗生素、蒙脱石、消旋卡多曲(杜拉宝)、益生菌、补液等治疗,并换用无乳糖奶粉、水解蛋白奶粉喂养,腹泻无缓解。体质量由起病前的8.5 kg降至6.5 kg。查体:T 37.5℃,P 124次/分,R 26次/分,BP 88/58 mm 1 case information in children, female, 1 year old 2 months, diarrhea more than 3 months. Stool 7 to 8 times / day, the amount of more than for the yellow watery stool, no mucus bloodshot eyes; no fever, convulsions. Visit the local hospital several times, check the potassium as low as 1.27 mmol / L, given antibiotics, montmorillonite, racecadotril (Dura, probiotics, rehydration and other treatment, and replaced with lactose-free milk powder, hydrolyzed protein Breastfeeding, no diarrhea relief. Body mass decreased from 8.5 kg before onset to 6.5 kg. Examination: T 37.5 ℃, P 124 beats / min, R 26 beats / min, BP 88/58 mm