| Fistula size and hemodynamics: an experimental model in canine femoral arteriovenous fistulas. | |
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MedLine Citation:
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PMID: 17393369 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The objective was to evaluate the impact of anastomosis diameter on blood flow in an arteriovenous fistula (AVF), comparing two different anastomosis sizes with a modified side-to-side technique in canine femoral arteries. METHODS: Ten mongrel dogs were subjected to two AVFs each, both using a modified side-to-side technique. On one side, the anastomosis diameter was 1.5 times the arterial diameter and on the other side 3.0 times the arterial diameter. Mean proximal and caudal blood flow and mean venous flow were measured using an electronic flowmeter 15, 20 and 25 min after surgery. The Mann-Whitney, Friedman and Wilcoxon non-parametric tests were used for data analysis (alpha < or = 0.05). RESULTS: Femoral artery flow cranial to the fistula became 5.6 times greater in the 1.5 arterial diameter group, and 8.4 times greater in the 3.0 arterial diameter group, when compared to initial arterial flow. The mean flow in the cranial vein was greater in the 3.0 group (10.09 times greater vs. 6.46 times greater in the 1.5 group). Both in the proximal artery and in the vein there was a significantly greater flow in the group with the larger anastomosis diameter (Wilcoxon test). In the femoral artery caudal to the fistula, the flow in most of the animals was reversed: 3.5 times greater in the 1.5 group and 1.2 times greater in the 3.0 group, without statistical difference. CONCLUSIONS: These results suggest that 3.0 times the arterial diameter for the AVF size in dogs leads to greater venous flow than with 1.5 times the arterial diameter, without increasing the reversed flow. |
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Authors:
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E Ramacciotti; S J Galego; M Gomes; S Goldenberg; P De Oliveira Gomes; J Pinto Ortiz |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: The journal of vascular access Volume: 8 ISSN: 1129-7298 ISO Abbreviation: J Vasc Access Publication Date: 2007 Jan-Mar |
Date Detail:
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Created Date: 2007-03-29 Completed Date: 2007-11-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100940729 Medline TA: J Vasc Access Country: Italy |
Other Details:
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Languages: eng Pagination: 33-43 Citation Subset: IM |
Affiliation:
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Hospital e Maternidade Dr Christóvão da Gama, Santo André, São Paulo, Brazil. eramacciotti@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Arteriovenous Anastomosis / surgery* Arteriovenous Shunt, Surgical / methods* Disease Models, Animal Dogs Femoral Artery / physiology, surgery* Femoral Vein / physiology, surgery Male Regional Blood Flow |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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