| Renal artery stenosis: grading with image-directed Doppler US evaluation of renal resistive index. | |
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MedLine Citation:
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PMID: 8115628 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To determine the role of intrarenal Doppler ultrasound (US) in detection of moderate to severe (> 50%) renal artery stenosis (RAS). MATERIALS AND METHODS: In 72 patients, 142 kidneys were examined with conventional angiography and color duplex US. Renal size, mean intrarenal-arterial resistive index (RI), and difference of mean RIs between both kidneys (delta RI) were determined and compared with severity of RAS as determined with quantitative angiography. RESULTS: In 32 patients, angiography showed mild RAS < or = 50% in 13, moderate RAS in 10, and severe RAS in nine. Both renal size and mean RI values were decreased significantly (P < .001) only for severe RAS compared with values in 40 control subjects. For delta RI, no significant difference was noted between controls and patients with mild RAS; highly significant differences, however, were noted for both moderate and severe RAS (P < .001). Sensitivity and specificity of a cutoff delta RI of > 5% were 82% and 92% for RAS > 50% and 100% and 94% for moderate RAS and RAS > 60%. CONCLUSION: Color Doppler US and analysis of intrarenal Doppler spectra are recommended as a useful method for noninvasive diagnosis and grading of RAS. In bilateral RAS > 50%, however, calculation of delta RI is potentially biased by undergrading of stenosis. |
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Authors:
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W B Schwerk; I K Restrepo; M Stellwaag; K J Klose; C Schade-Brittinger |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Radiology Volume: 190 ISSN: 0033-8419 ISO Abbreviation: Radiology Publication Date: 1994 Mar |
Date Detail:
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Created Date: 1994-03-25 Completed Date: 1994-03-25 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 785-90 Citation Subset: AIM; IM |
Affiliation:
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Department of Internal Medicine, Philipps-University, Marburg, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Angiography Blood Flow Velocity / physiology Double-Blind Method Female Humans Male Middle Aged Prospective Studies Renal Artery / physiopathology, radiography, ultrasonography* Renal Artery Obstruction / epidemiology, radiography, ultrasonography* Sensitivity and Specificity Signal Processing, Computer-Assisted Ultrasonics Vascular Resistance / physiology |
| Comments/Corrections | |
Comment In:
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Radiology. 1994 Oct;193(1):280-1
[PMID:
8090910
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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