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Effect of anastomosis angle on hemodynamic of side-to-end radiocephalic arteriovenous fistula (RCAVF)

Wan Hassan, Wan Anuar and Osman, Kahar and Abdul Kadir, Mohammed Rafiq and Wan Abdullah, Wan Ahmad Kamil and Haron, Juhara and Ngali, Mohd. Zamani (2012) Effect of anastomosis angle on hemodynamic of side-to-end radiocephalic arteriovenous fistula (RCAVF). AIP Conference Proceedings, 1440 . pp. 665-670. ISSN 0094-243X

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Official URL: http://dx.doi.org/10.1063/1.4704276

Abstract

Radiocephalic arteriovenous fistula (RCAVF) at wrist is the chosen access for hemodialysis. Most studies describe access complications without considering the effect of the anastomosis angle. In the present investigation, eighteen three-dimensional, simplified models of RCAVF were used to analyze the hemodynamic effect of anastomosis angle under fixed flow rate of 900 ml/min, corresponding to Reynolds number 950. EFD. Lab software was used in the flow simulation with steady flow conditions. The results show that high pressure drop was observed for RCAVF with smaller anastomosis angle. However, for cases with anastomosis angle larger than 45°, pressure drop became relatively constant. The results also show that large vortices appeared in cases with angle smaller than 30°. For cases with angle larger than 60°, low flow zone appeared at the inner wall that may lead to promotion of intimal thickening and formation of stenosis. Overall, for average flowrate, it is recommended that anastomosis angle should be maintained between 45° and 60° to minimize adverse effects.

Item Type:Article
Uncontrolled Keywords:AIP
Subjects:T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions:Mechanical Engineering
ID Code:46843
Deposited By: Haliza Zainal
Deposited On:22 Jun 2015 13:56
Last Modified:21 Sep 2017 13:03

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