Document Detail

Doppler ultrasound assessment of posterior tibial artery size in humans.
MedLine Citation:
PMID:  16673363     Owner:  NLM     Status:  MEDLINE    
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.
Manning J Sabatier; Lee Stoner; Matt Reifenberger; Kevin McCully
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of clinical ultrasound : JCU     Volume:  34     ISSN:  0091-2751     ISO Abbreviation:  J Clin Ultrasound     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-05-11     Completed Date:  2006-11-24     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  0401663     Medline TA:  J Clin Ultrasound     Country:  United States    
Other Details:
Languages:  eng     Pagination:  223-30     Citation Subset:  IM    
Department of Exercise Science, University of Georgia, Athens, 30602, USA.
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MeSH Terms
Analysis of Variance
Image Processing, Computer-Assisted / methods
Observer Variation
Reference Values
Reproducibility of Results
Tibial Arteries / anatomy & histology*,  ultrasonography*
Ultrasonography, Doppler / methods*
Grant Support

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