Abstract

With the advent of using an arteriovenous fistula for hemodialysis, the anastomosis built for such use has become a central point of study to help understand the flow and wall shear stresses in various parts of the hemodialysis system. Using the common creation site of an anastomosis and connecting the radial artery to the cephalic vein, a model is created to determine the wall shear stresses across various components of the system since wall shear stresses play an important role in evaluating the efficacy of the system. The model also includes the insertion of needles to simulate the hemodialysis procedure. Two 17 Gauge needles are inserted in the cephalic vein with a flow of 250 [mL/min]. ANSYS Fluent is employed in the simulations. Wall Shear stresses produced across the entire system are found to be in the range of 110 - 209 Pa based on the maximum values at the anastomosis and flow rate at the vein’s outlet of 0.008 [kg/s]. These are reasonable values also found by other investigators.

Document Type

Final Report

Author's School

McKelvey School of Engineering

Author's Department

Mechanical Engineering and Materials Science

Class Name

Mechanical Engineering and Material Sciences Independent Study

Date of Submission

7-11-2022

Available for download on Tuesday, July 11, 2023

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