Hamzaini A H, Helmee M N, Masoud S, Suraya A, Nazri M S J, Das S
Department of Radiology, Faculty of Medicine, Universiti Kebangsaan, Malaysia.
Clin Ter. 2009;160(6):473-5.
Many patients who presented to Universiti Kebangsaan Malaysia Medical Centre (UKMMC) with signs and symptoms of urolithiasis had mild hydronephrosis with non visualization of calculus on ultrasound examination. These patients underwent an intravenous urogram (IVU) in order to determine the presence of urolithiasis and most of them had normal IVU. The main aim of this study was to determine the predictive value of urinalysis in this group of patients in determining the need for IVU examinations.
Retrospectively the ultrasound, urinalysis and intravenous urography reports of 53 patients were reviewed and evaluated.
The positive predictive and negative predictive value of urinalysis was found to be 68% and 96.4%, respectively. CONCLUSIONS; The results indicate that the urinalysis was an excellent negative predictor for IVU. In view of high radiation dose, risk of contrast reaction and contrast induced nephropathy of IVU, we suggest that it should not be performed in patient with non visualization of calculus mild hydronephrosis when the urinalysis is negative for blood.
许多因尿路结石症状就诊于马来西亚国民大学医学中心（UKMMC）的患者，超声检查显示有轻度肾积水且未发现结石。这些患者接受了静脉肾盂造影（IVU）以确定是否存在尿路结石，其中大多数IVU结果正常。本研究的主要目的是确定在这类患者中尿液分析对于判断是否需要进行IVU检查的预测价值。
回顾性分析53例患者的超声、尿液分析和静脉肾盂造影报告并进行评估。
尿液分析的阳性预测值和阴性预测值分别为68%和96.4%。
结果表明尿液分析是IVU检查出色的阴性预测指标。鉴于IVU存在高辐射剂量、造影剂反应风险及造影剂诱发肾病的问题，我们建议当尿液分析潜血阴性时，对于结石未显影且有轻度肾积水的患者不应进行IVU检查。
