| Flow visualization analysis in a model of artery-graft anastomosis. | |
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MedLine Citation:
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PMID: 1483119 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Flow characteristics near the end-to-end anastomosis of vascular graft were studied in model tubes by flow visualization techniques. Artery and vascular graft were modelled by an elastic tube fabricated from an elastomeric polymer and a rigid plastic tube, respectively. Anastomotic models were made by connecting these two tubes, which had compliance mismatch at their anastomoses. These model tubes were installed into a mock circulatory loop and flow was visualized using hydrogen bubbles and aluminum powder as the tracer. Flow disturbances including flow separation and eddies were observed near the modelled distal anastomosis (graft-to-artery anastomosis). Peak values of the wall shear rate were high in the proximal anastomotic area (artery-to-graft anastomosis) and low in the distal region. These phenomena were enhanced in the models with increased compliance mismatch. The local abnormal flow observed in the anastomotic zone might cause thrombus formation and subintimal hyperplasia. To improve the patency in small-calibered arterial grafts, it is important to match their compliance to that of natural arteries. |
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Authors:
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T Matsumoto; T Naiki; K Hayashi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Bio-medical materials and engineering Volume: 2 ISSN: 0959-2989 ISO Abbreviation: Biomed Mater Eng Publication Date: 1992 |
Date Detail:
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Created Date: 1993-02-17 Completed Date: 1993-02-17 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9104021 Medline TA: Biomed Mater Eng Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 171-83 Citation Subset: IM |
Affiliation:
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Department of Scientific Instrumentation and Control, Hokkaido University, Sapporo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Anastomosis, Surgical* Arteries / physiology* Blood Vessel Prosthesis* Compliance Elasticity Graft Occlusion, Vascular / etiology, physiopathology Hemodynamics Humans Materials Testing Models, Cardiovascular* Rheology* Stress, Mechanical |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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