OBJECTIVE: The aim of the study was to determine if the degree of hydronephrosis on focused emergency renal ultrasound correlates with kidney stone size on computed tomography. METHODS: A retrospective study was performed on all adult patients in the emergency department who had a focused emergency renal ultrasound and ureterolithiasis on noncontrast computed tomography. Severity of hydronephrosis was determined by the performing physician. Ureteral stone size was grouped into 5 mm or less and larger than 5 mm based on likelihood of spontaneous passage. RESULTS: One hundred seventy-seven ultrasound scans were performed on patients with ureteral calculi. When dichotomized using test characteristic analysis, patients with none or mild hydronephrosis (72.9%) were less likely to have ureteral calculi larger than 5 mm than those with moderate or severe hydronephrosis (12.4% vs 35.4%; P < .001) with a negative predictive value of 0.876 (95% confidence interval, 0.803-0.925). CONCLUSION: Patients with less severe hydronephrosis were less likely to have larger ureteral calculi.
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机译：目的：本研究的目的是确定在急诊聚焦超声检查中肾积水的程度是否与计算机体层摄影术中的肾结石大小相关。方法：对急诊科所有成年患者进行了回顾性研究，这些患者在非对比计算机体层摄影术中进行了重点急诊肾脏超声检查和输尿管结石。肾积水的严重程度由执行医师确定。根据自发通过的可能性，将输尿管结石的大小分为5mm以下和大于5mm。结果：对输尿管结石患者进行了177次超声扫描。如果使用测试特征分析将其分为两部分，则无中度肾积水或轻度肾积水的患者（72.9％）较中度或重度肾积水的患者输尿管结石的可能性大于5 mm（12.4％vs 35.4％; P <.001）预测值为0.876（95％置信区间0.803-0.925）。结论：严重肾积水较少的患者输尿管结石的可能性较小。
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