title: Spectral analysis criteria in duplex scanning of aortoiliac and femoropopliteal arterial disease.
abstract: 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.
authors.affiliation: Department of Vascular Surgery, St. Antonius Hospital, Nieuwegein, The Netherlands.
authors.forename: D A
authors.initials: DA
authors.lastname: Legemate
authors.forename: C
authors.initials: C
authors.lastname: Teeuwen
authors.forename: H
authors.initials: H
authors.lastname: Hoeneveld
authors.forename: R G
authors.initials: RG
authors.lastname: Ackerstaff
authors.forename: B C
authors.initials: BC
authors.lastname: Eikelboom
mesh_terms: D015901:Angiography, Digital Subtraction; D001018:Aortic Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology; D001161:Arteriosclerosis / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005263:Femoral Artery / Q000000981:diagnostic imaging*; D006801:Humans; D007083:Iliac Artery / Q000000981:diagnostic imaging*; D009426:Netherlands / Q000453:epidemiology; D011150:Popliteal Artery / Q000000981:diagnostic imaging*; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis; D014465:Ultrasonics; D014463:Ultrasonography