| Measurement of steady-flow instability and turbulence levels in Dacron vascular grafts. | |
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MedLine Citation:
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PMID: 1487906 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Fluid dynamic properties of Dacron vascular grafts were studied under controlled steady-flow conditions over a Reynolds number range of 800 to 4500. Knitted and woven grafts having nominal diameters of 6 mm and 10 mm were studied. Thermal anemometry was used to measure centerline velocity at the downstream end of the graft; pressure drop across the graft was also measured. Transition from laminar flow to turbulent flow was observed, and turbulence intensity and turbulent stresses (Reynolds normal stresses) were measured in the turbulent regime. Knitted grafts were found to have greater pressure drop than the woven grafts, and one sample was found to have a critical Reynolds number (Rc) of less than one-half the value of Rc for a smooth-walled tube. |
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Authors:
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D G Shombert |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Journal of biomechanical engineering Volume: 114 ISSN: 0148-0731 ISO Abbreviation: J Biomech Eng Publication Date: 1992 Nov |
Date Detail:
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Created Date: 1993-02-25 Completed Date: 1993-02-25 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7909584 Medline TA: J Biomech Eng Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 521-6 Citation Subset: IM |
Affiliation:
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Division of Physical Sciences, Food and Drug Administration, Rockville, MD 20857. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biomechanics Blood Flow Velocity / physiology Blood Pressure / physiology Blood Vessel Prosthesis* Blood Viscosity / physiology Hemodynamics / physiology* Humans Models, Cardiovascular* Polyethylene Terephthalates* Prosthesis Design Vascular Resistance / physiology |
| Chemical | |
Reg. No./Substance:
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0/Polyethylene Terephthalates |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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