| Doppler ultrasound assessment of posterior tibial artery size in humans. | |
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MedLine Citation:
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PMID: 16673363 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The difference between structural remodeling and changes in tone of peripheral arteries in the lower extremities has not been evaluated. The purpose of this study was to (1) evaluate the day-to-day reproducibility and interobserver reliability (IOR) of posterior tibial artery (PTA) diameter measurements and (2) evaluate the effect of posture on PTA diameter at rest (Drest), during 10 minutes of proximal cuff occlusion (Dmin), and after the release of cuff occlusion (Dmax), as well as range (Dmax - Dmin) and constriction [(Dmax - Drest)/(Dmax - Dmin) x 100] in vivo. METHODS: We used B-mode sonography to image the PTA during each condition. RESULTS: Day-to-day reliability was good for Drest (intraclass correlation coefficient [ICC] 0.95; mean difference 4.2%), Dmin (ICC 0.93; mean difference 5.4%), and Dmax (ICC 0.99; mean difference 2.2%). The coefficient of repeatability for IOR was 70.5 microm, with a mean interobserver error of 4.7 microm. The seated position decreased Drest (2.6 +/- 0.2 to 2.4 +/- 0.3 mm; p = 0.002), increased Dmin (2.1 +/- 0.2 to 2.4 +/- 0.2 mm; p = 0.001), and decreased Dmax (3.1 +/- 0.4 to 2.8 +/- 0.3 mm; p < 0.001) compared with the supine position. The seated position also decreased arterial range (Dmax - Dmin) from 0.9 +/- 0.2 to 0.5 +/- 0.1 mm (p = 0.003) and increased basal arterial constriction from 57 +/- 19% to 105 +/- 27% (p = 0.007). CONCLUSIONS: The system employed for measuring PTA diameter yields unbiased and consistent estimates. Furthermore, lower extremity arterial constriction and range change with posture in a manner consistent with known changes in autonomic activity. |
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Authors:
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Manning J Sabatier; Lee Stoner; Matt Reifenberger; Kevin McCully |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: Journal of clinical ultrasound : JCU Volume: 34 ISSN: 0091-2751 ISO Abbreviation: J Clin Ultrasound Publication Date: 2006 Jun |
Date Detail:
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Created Date: 2006-05-11 Completed Date: 2006-11-24 Revised Date: 2007-12-03 |
Medline Journal Info:
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Nlm Unique ID: 0401663 Medline TA: J Clin Ultrasound Country: United States |
Other Details:
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Languages: eng Pagination: 223-30 Citation Subset: IM |
Affiliation:
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Department of Exercise Science, University of Georgia, Athens, 30602, USA. msabat1@cellbio.emory.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Female Humans Image Processing, Computer-Assisted / methods Male Observer Variation Posture Reference Values Reproducibility of Results Tibial Arteries / anatomy & histology*, ultrasonography* Ultrasonography, Doppler / methods* |
| Grant Support | |
ID/Acronym/Agency:
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HL-65179/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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