| Blood flow in distal end-to-side anastomoses with PTFE and a venous patch: results of an in vitro flow visualisation study. | |
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MedLine Citation:
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PMID: 10479625 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: non-physiological flow behaviour plays a significant role in the development of distal anastomotic intimal hyperplasia. To investigate flow patterns in four anastomotic types of femoral end-to-side distal bypass graft anastomoses, a flow visualisation study was performed. METHODS: transparent 1:1 casted replicas of distal vascular graft anastomoses created by conventional technique, Miller-cuff, Taylor- and Linton-patch were fabricated. A pulsatile mock circulation with a high-speed video system was constructed. Flow pattern was determined at mean Reynolds numbers 100-500. Migrations of the stagnation points on the bottom of the anastomoses at mean Reynolds numbers 100, 230, and 350 were measured. RESULTS: a vortex forms during early systole and increases to maximum systole in all anastomoses. During the diastolic phase the vortex moves in the Miller-cuff distally to the toe of the anastomosis and remains standing, while in the other anastomotic types the vortex moves proximally to the heal of the junction and breaks down. The shift of the stagnation point in the Miller-cuff was considerably smaller than in the other anastomoses. CONCLUSION: conventional, Linton and Taylor anastomoses show similar flow patterns. The Miller-cuff with its wider cavity shows lower shift of the bottom stagnation point, but a persistent washout of the anastomotic cavity, which may contribute to its reported good clinical performance. |
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Authors:
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N Noori; R Scherer; K Perktold; M Czerny; G Karner; M Trubel; P Polterauer; H Schima |
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Publication Detail:
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Type: Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery Volume: 18 ISSN: 1078-5884 ISO Abbreviation: Eur J Vasc Endovasc Surg Publication Date: 1999 Sep |
Date Detail:
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Created Date: 1999-10-04 Completed Date: 1999-10-04 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9512728 Medline TA: Eur J Vasc Endovasc Surg Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 191-200 Citation Subset: IM |
Copyright Information:
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Copyright 1999 Harcourt Publishers Ltd. |
Affiliation:
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Department of Vascular Surgery, LBI of Cardiosurgical Research, Austria. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Anastomosis, Surgical
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methods* Animals Blood Vessel Prosthesis* Computer Simulation Femoral Artery / physiopathology, surgery Fibromuscular Dysplasia / physiopathology Hemodynamics / physiology* Models, Cardiovascular* Polytetrafluoroethylene* Pulsatile Flow / physiology Sheep Suture Techniques Veins / transplantation* |
| Chemical | |
Reg. No./Substance:
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9002-84-0/Polytetrafluoroethylene |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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