Kohler T R, Nance D R, Cramer M M, Vandenburghe N, Strandness D E
Department of Surgery, University of Washington School of Medicine, Seattle.
Circulation. 1987 Nov;76(5):1074-80. doi: 10.1161/01.cir.76.5.1074.
We compared ultrasonic duplex scanning and angiography for the localization and classification of arterial stenoses and occlusions in 32 patients. The criteria for the detection of a greater than 50% diameter reducing stenosis was an increase in peak systolic velocity of greater than 100%, loss of reverse flow, and spectral broadening. Duplex studies and angiograms were evaluated in a blinded fashion. The agreement between duplex scanning and angiography for the 383 arterial segments studied was not significantly different than the previously reported agreement between two different radiologists reading the same angiograms (kappa of 0.55 vs 0.63). For detecting stenoses that were greater than 50% diameter reducing by angiography, duplex scanning had a sensitivity of 82%, a specificity of 92%, a positive predictive value of 80%, and a negative predictive value of 93%. These results are as good as previously reported comparisons between two different radiologists' readings of the same angiograms.
我们对32例患者的动脉狭窄和闭塞进行了超声双功扫描和血管造影，以进行定位和分类。检测直径缩小超过50%的狭窄的标准是收缩期峰值速度增加超过100%、反向血流消失和频谱增宽。双功扫描研究和血管造影以盲法进行评估。在研究的383个动脉节段中，双功扫描与血管造影之间的一致性与之前报道的两位不同放射科医生阅读同一血管造影的一致性无显著差异（kappa值分别为0.55和0.63）。对于血管造影显示直径缩小超过50%的狭窄，双功扫描的敏感性为82%，特异性为92%，阳性预测值为80%，阴性预测值为93%。这些结果与之前报道的两位不同放射科医生阅读同一血管造影的比较结果一样好。
