Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
FLOW ANALYSIS IN RIGID AND FLEXIBLE ARTERIOVENOUS FISTULA MODELS
Submission Author:
Jonhattan Ferreira Rangel , RN
Co-Authors:
Jonhattan Ferreira Rangel, Willyam Brito de Almeida Santos, Kleiber Lima de Bessa, Thercio Costa
Presenter: Jonhattan Ferreira Rangel
doi://10.26678/ABCM.COBEM2019.COB2019-0747
Abstract
Arteriovenous fistula (AVF) is the most commonly used vascular access (VA) for the treatment of hemodialysis. Even though AVF is the most used VA it can suffer problems due to its construction and use. High shear stresses and recirculation zones (related to the change in geometry and flow parameters in the vessels after the creation of the AVF) contribute to the appearance of pathologies that may render the VA unusable. In order to relate the flow conditions and the geometry of the VA with the possible appearance of pathologies the work proposes to analyze experimentally the flow in rigid and flexible AVF models constructed from real data of a patient. From the computed tomography of the patient the cleaning and selection of the VA region were performed from which AVFs rigid and molds were manufactured for the production of silicone AVFs. As a result, the rigid AVFs and the mold for the manufacture of the flexible AVFs were obtained besides the construction of the experimental bench where, through analysis and adjustments, the cardiac pulses were obtained with their maximum and minimum values ranging from 80 mmHg to 120 mmHg and average periods of 1s values close to the physiological ones.
Keywords
Arteriovenous Fistula, Shear Stress, experimental analysis, pressure field.
