| Boundary layer separation in models of side-to-end arterial anastomoses. | |
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MedLine Citation:
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PMID: 160777 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We performed an investigation of boundary layer separation in models of side-to-end anastomoses, used clinically in axillofemoral and femorofemoral grafting. Boundary layer separation occurs when momentum causes a fluid to flow against a local pressure gradient. Models of side-to-end anastomoses were constructed from Dacron grafting material and from clear plastic blocks and tubing. Fluid energy loss across the anastomosis was small and physiologically insignificant. Local adverse pressure gradients were demonstrated near the anastomosis. Flow visualization studies demonstrated characteristic areas of boundary layer separation in the region of the adverse pressure gradients. The separation region involved both the main limb and the side arm. The separation forms a shell or ring of slow-moving fluid around the mainstream. Preliminary studies with pulsatile flow and with blood demonstrate that boundary layer separation occurs under clinical flow conditions. Boundary layer separation may play a role in the development of anastomotic hyperplasia and atherosclerotic deposits in the vicinity of surgical anastomoses. |
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Authors:
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F W LoGerfo; T Soncrant; T Teel; C F Dewey |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Archives of surgery (Chicago, Ill. : 1960) Volume: 114 ISSN: 0004-0010 ISO Abbreviation: Arch Surg Publication Date: 1979 Dec |
Date Detail:
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Created Date: 1980-03-24 Completed Date: 1980-03-24 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9716528 Medline TA: Arch Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1369-73 Citation Subset: AIM; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Arteriosclerosis
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etiology Blood Flow Velocity* Blood Vessel Prosthesis* Femoral Artery / surgery* Humans Models, Biological* Polyethylene Terephthalates Postoperative Complications / etiology |
| 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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