Tiselius H G
Urol Res. 1985;13(6):297-300. doi: 10.1007/BF00262660.
The risk of calcium crystallization (CaOx-CR) in urine was analyzed by means of crystal counting following standardized addition of oxalate. CaOx-CR was determined in 24 h urine samples from 21 stone formers and 26 normal subjects following dilution of urine to a creatinine concentration of 5 mumol per ml. The mean (+/- SD) CaOx-CR was in stone formers 1.42 +/- 0.57 and in normal subjects 1.29 +/- 0.40. CaOx-CR was also analyzed in 16 fresh urine samples diluted to 80 per cent of the original concentration whereby values between 0.36 and 3.6 were recorded. There was a good correlation between CaOx-CR and estimates of the ion-activity product of CaOx, both in urine diluted to 5 mumol of creatinine per ml and in 80 per cent diluted urine. It ist suggested that the method described is of value for evaluation and follow up of patients with CaOx urolithiasis.
通过在草酸盐标准化添加后进行晶体计数来分析尿液中草酸钙结晶（CaOx-CR）的风险。在将21名结石形成者和26名正常受试者的24小时尿液样本稀释至肌酐浓度为每毫升5微摩尔后，测定CaOx-CR。结石形成者的平均（±标准差）CaOx-CR为1.42±0.57，正常受试者为1.29±0.40。还对16份稀释至原始浓度80%的新鲜尿液样本进行了CaOx-CR分析，记录的值在0.36至3.6之间。在稀释至每毫升肌酐5微摩尔的尿液以及80%稀释尿液中，CaOx-CR与草酸钙离子活性产物的估计值之间存在良好的相关性。建议所描述的方法对于草酸钙尿路结石患者的评估和随访具有价值。
