BACKGROUND:The prevalence of lithiasis is increasing at all ages. This study aimed to assess the crystallization risk in urine from healthy school children and to determine urinary parameters that are most associated with it. METHODS:Urine samples were obtained from 184 children aged 5-12 years: a spot sample collected in the afternoon, and a 12-h overnight sample. Information was obtained regarding family histories of lithiasis. Urine volume, pH, and biochemical parameters of stone risk were measured. Crystallization risk was defined by the presence of specific urine conditions that had previously been associated with stone formation in vitro. RESULTS:Crystallization risk was observed in 15 % of spot urine samples and 54 % of 12-h samples. Metabolic abnormalities and a low urinary volume were more frequently detected in children with crystallization risk. Calcium excretion and calcium/citrate ratio were higher in children with a family history of lithiasis. CONCLUSIONS:We observed a high prevalence of crystallization risk in urine, especially in children with a family history of the disease. Low urinary volume was the factor most associated with increased risk. Adequate fluid intake at an early age may be a simple and effective measure to reduce the incidence of nephrolithiasis.

译文

背景:石斑症的患病率在各个年龄段都在增加。这项研究旨在评估健康学童尿液中结晶的风险,并确定与其最相关的尿液参数。
方法:从184名5至12岁的儿童获得尿液样本:下午收集现场样本,并收集12小时的过夜样本。获得了有关石尿症家族史的信息。测量尿液体积,pH值和结石风险的生化参数。结晶风险是由以前与体外结石形成有关的特定尿液条件定义的。
结果:在15%的现货尿液样本和54%的12小时样本中观察到结晶风险。具有结晶风险的儿童更经常检测到代谢异常和尿量低。有结石病家族史的儿童的钙排泄和钙/柠檬酸比更高。
结论:我们观察到尿液中结晶风险的患病率很高,尤其是在有该病家族史的儿童中。低尿量是与增加风险最相关的因素。早期摄入足够的液体可能是减少肾结石症发生率的一种简单有效的措施。

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