Spectral analysis criteria in duplex scanning of aortoiliac and femoropopliteal arterial disease

D. A. Legemate, C. Teeuwen, H. Hoeneveld, R. G. Ackerstaff, B. C. Eikelboom

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To validate the use of duplex scanning in the detection of lesions in the aortoiliac and femoropopliteal arteries, duplex scanning was prospectively compared to intra-arterial digital subtraction angiography in 61 patients with peripheral atherosclerotic disease. Based on a peak systolic velocity ratio greater than or equal to 2.5 or the absence of a Doppler signal, the overall sensitivity and specificity to detect lesions of greater than or equal to 50% diameter reduction was 84% and 96%, although some segments in the femoropopliteal arteries showed a sensitivity of only 60%-70%. Occlusions were detected with an overall sensitivity of 92% and specificity of 99%. The existence of a bi/triphasic Doppler signal, a window in the systolic spectral waveform and an end diastolic velocity greater than or equal to 60 cm/s has additional value in further grading of stenoses. This study shows that duplex scanning is highly comparable to angiography in the detection greater than or equal to 50% diameter reducing lesions in the aortoiliac arteries. Further evaluation is needed for the femoropopliteal arteries
Original languageEnglish
Pages (from-to)769-776
JournalUltrasound in Medicine & Biology
Issue number8
Publication statusPublished - 1991

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