Tublin M E, Dodd G D, Verdile V P
Department of Radiology, University of Pittsburgh Medical Center, Pa.
Radiology. 1994 Dec;193(3):697-701. doi: 10.1148/radiology.193.3.7972809.
To determine the sensitivity of renal duplex Doppler sonography in the detection of patients with acute renal colic.
The authors correlated results of renal duplex Doppler sonography with those of urography in 32 patients presenting with symptoms of urinary colic. The mean resistive index (RI) of each kidney and the difference between the mean RIs (delta RI) of both kidneys were calculated for all patients. The nonpaired two-tailed Student t test was used to determine if there was a significant difference in parameters between patients with and without obstruction. The sensitivity and specificity of the mean RI and the delta RI for the diagnosis of acute renal colic were calculated.
Nineteen patients had obstruction. The differences in the mean RI and delta RI for the patients with and without obstruction were statistically significant. When the published discriminatory thresholds for obstruction (mean RI > or = 0.7, delta RI > or = 0.1) were applied, however, the sensitivity and specificity of the Doppler examination were only 44% and 82%, respectively.
Duplex Doppler sonography is highly insensitive for the detection of acute renal colic.
确定肾双功多普勒超声检查对急性肾绞痛患者的检测敏感性。
作者将32例有尿绞痛症状患者的肾双功多普勒超声检查结果与尿路造影结果进行了对比。计算了所有患者每个肾脏的平均阻力指数（RI）以及双肾平均RI之间的差值（ΔRI）。采用非配对双尾Student t检验来确定梗阻患者与无梗阻患者之间参数是否存在显著差异。计算了平均RI和ΔRI对急性肾绞痛诊断的敏感性和特异性。
19例患者存在梗阻。梗阻患者与无梗阻患者的平均RI和ΔRI差异具有统计学意义。然而，当应用已公布的梗阻鉴别阈值（平均RI≥0.7，ΔRI≥0.1）时，多普勒检查的敏感性和特异性分别仅为44%和82%。
双功多普勒超声检查对急性肾绞痛的检测高度不敏感。
