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- Title
Noninvasive Evaluation of Carotid Artery Stenosis -- Comparison of Direct and Indirect Techniques.
- Authors
Van Baalen, Jary M.; Jakimowicz, Jack J.; Reneman, Robert S.
- Abstract
In a prospective study of 50 consecutive patients the results of invasive and noninvasive investigations were compared. As noninvasive examinations the OPG-Gee, periorbital Doppler examination and direct Doppler examination of the carotid arteries were performed. Both Doppler examinations used audio spectrum analysis. In severe stenosis (70% diameter reduction or more) the diagnostic accuracy of the OPG was 91% and of the periorbital examination 90%. Direct Doppler examination diagnosed all lesions. In moderate stenoses (30 to 69%) the indirect techniques proved to be inadequate to diagnose the lesions, while the direct Doppler examination showed spectral broadening in 7 out of 8 stenosed internal carotid arteries. Spectral frequency analysis may be used to grade stenotic lesions. Severe stenoses and total occlusion could be distinguished by direct cervical Doppler examination, which appeared to be impossible with the indirect techniques. The findings of this study indicate that direct Doppler examination of the certival carotid arteries is superior to indirect techniques.
- Subjects
CAROTID artery; SPECTRUM analysis; DOPPLER ultrasonography; DIAGNOSIS; PATIENTS
- Publication
Vascular Surgery, 1984, Vol 18, Issue 2, p88
- ISSN
0042-2835
- Publication type
Article
- DOI
10.1177/153857448401800204