近年来,我们收治医源性水电解质紊乱并菌群失调患儿30例,现总结分析如下。一、临床资料;患儿年龄1个月至5岁,其中1～18月者27例。主要诊断依据为: 1.水电解质紊乱:①有长期不恰当输液史;②水电解质紊乱的临床表现(主要为精神症状、循环衰竭);③血清电解质、CO_2CP及pH改变(以低血钠、低血钾为主)。2.菌群失调:①有长期滥用抗生素及激素 In recent years, we treated iatrogenic electrolyte imbalance and flora in children with 30 cases, are summarized as follows. First, the clinical data; children aged 1 month to 5 years old, of which 1 to 18 months in 27 cases. The main diagnosis based on: 1. Water and electrolyte disorders: ① history of improper infusion for a long time; ② clinical manifestations of water and electrolyte disorders (mainly mental symptoms, circulatory failure); ③ serum electrolytes, CO_2CP and pH changes (hyponatremia, Hypokalemia-based). 2. Dystrophy: ① long-term abuse of antibiotics and hormones