| In vivo ultrasonic measurement of tissue vibration at a stenosis: a case study. | |
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MedLine Citation:
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PMID: 11527591 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It is known that bruits often can be heard downstream from stenoses. They are thought to be produced by disturbed blood flow and vessel wall vibrations. Our understanding of bruits has been limited, though, to analysis of sounds heard at the level of the skin. For direct measurements from the stenosis site, we developed an ultrasonic pulse-echo multigate system using quadrature phase demodulation. The system simultaneously measures tissue displacements and blood velocities at multiple depths. This paper presents a case study of a severe stenosis in a human infrainguinal vein bypass graft. During systole, nearly sinusoidal vessel wall vibrations were detected. Solid tissue vibration amplitudes measured up to 2 microm, with temporal durations of 100 ms and frequencies of roughly 145 Hz and its harmonics. Cross-axial oscillations were also found in the lumen that correlate with the wall vibrations, suggesting coupling between wall vibration and blood velocity oscillation. |
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Authors:
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M I Plett; K W Beach; B Dunmire; K G Brown; J F Primozich; E Strandness |
Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Ultrasound in medicine & biology Volume: 27 ISSN: 0301-5629 ISO Abbreviation: Ultrasound Med Biol Publication Date: 2001 Aug |
Date Detail:
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Created Date: 2001-08-30 Completed Date: 2001-10-25 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0410553 Medline TA: Ultrasound Med Biol Country: England |
Other Details:
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Languages: eng Pagination: 1049-58 Citation Subset: IM |
Affiliation:
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Department of Electrical Engineering, Seattle Pacific University, Seattle, WA 98119, USA. mplett@spu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity Constriction, Pathologic / ultrasonography Graft Occlusion, Vascular / ultrasonography Humans Peripheral Vascular Diseases / ultrasonography* Vibration |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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