本文将1986年～1994年,我院诊治的小儿肾脏病并发的64例低钠血症(血清钠135mmol/L)中,资料较完整的中、重度低钠血症21例分析如下,并对其原因及诊治措施进行探讨。1　临床资料1.1　原发病类型　急性肾炎3例(男2例,女1例,年龄7～13岁);单纯性肾病8例(男2例,女6例,年龄3～10岁); This article from 1986 to 1994, pediatric nephropathy diagnosed in our hospital of 64 cases of hyponatremia (serum sodium 135mmol / L), data more complete and moderate hyponatremia in 21 cases analyzed as follows, and Its causes and diagnosis and treatment measures to explore. 1 clinical data 1.1 primary type of acute nephritis in 3 cases (2 males and 1 female, aged 7 to 13 years); simple nephropathy in 8 cases (2 males and 6 females, aged 3 to 10 years);