| Duplex and color Doppler flow sonography of occlusion and near occlusion of the carotid artery. | |
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MedLine Citation:
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PMID: 8871711 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To determine whether color Doppler flow imaging with the use of slow-flow sensitivity improves sensitivity and specificity in the differentiation of occlusion and near occlusion of the internal carotid artery. METHODS: Color Doppler and duplex sonography were performed in symptomatic patients who had angiographically confirmed occlusion and/or near occlusion of the internal carotid artery. The study consisted of two phases: in the first, we assessed the usefulness of color Doppler flow imaging by retrospectively reviewing the records of 35 patients with 36 angiographically confirmed occlusions or near occlusions of the internal carotid artery who were examined with color Doppler flow imaging at our institution during a period of 4 years; in the second phase, we incorporated color Doppler sonography into the routine scanning protocols of 39 patients with 41 occluded or nearly occluded internal carotid arteries seen over a period of 2 1/2 years. RESULTS: Overall, color Doppler imaging correctly showed all 34 of the near occlusions (sensitivity, 100%) and 36 of the 43 occlusions (specificity, 84%). Seven patients with angiographically confirmed occlusion had sonographic findings that suggested near occlusion. In the first phase, eight near occlusions were misinterpreted as occlusions with conventional duplex sonography, but were correctly shown with color Doppler flow imaging. In the second phase, sensitivity increased from 50% to 100% (18 or 18) because of better detection of the nearly occluded lumen. This was at the expense of a decrease in specificity (from 100% to 78%). owing to identification of apparent flow in the internal carotid artery on color Doppler flow images in five of 23 occlusions. CONCLUSION: Because of its ability to depict slow flow, color Doppler imaging with slow-flow sensitivity is superior to conventional duplex sonography for the noninvasive discrimination of occlusion from near occlusion of the internal carotid artery. |
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Authors:
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D H Lee; F Q Gao; R N Rankin; D M Pelz; A J Fox |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: AJNR. American journal of neuroradiology Volume: 17 ISSN: 0195-6108 ISO Abbreviation: AJNR Am J Neuroradiol Publication Date: 1996 Aug |
Date Detail:
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Created Date: 1997-01-10 Completed Date: 1997-01-10 Revised Date: 2008-02-14 |
Medline Journal Info:
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Nlm Unique ID: 8003708 Medline TA: AJNR Am J Neuroradiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1267-74 Citation Subset: IM |
Affiliation:
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Department of Diagnostic Radiology, University Hospital, University of Western Ontario, London, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arterial Occlusive Diseases
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radiography,
ultrasonography* Carotid Artery Diseases / radiography, ultrasonography* Carotid Artery, Internal / radiography, ultrasonography Cerebral Angiography Female Humans Male Middle Aged Retrospective Studies Sensitivity and Specificity Ultrasonography, Doppler, Color* Ultrasonography, Doppler, Duplex* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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