Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ANALYSIS OF THE PRESSURE FIELD IN RIGID ARTERIOVENOUS FISTULA WITH VARIATION IN THE AREA OF THE ANASTOMOSIS
Submission Author:
Alexsandra Tomé dos Santos , RN
Co-Authors:
Alexsandra Tomé dos Santos, Willyam Brito de Almeida Santos, Everton Guedes de Lima, Jonhattan Ferreira Rangel, Kleiber Lima de Bessa
Presenter: Alexsandra Tomé dos Santos
doi://10.26678/ABCM.COBEM2021.COB2021-0884
Abstract
In recent years, the number of patients with chronic renal failure (CRF) has increased. For the treatment of these patients, hemodialysis is performed. Arteriovenous fistula (AVF) is an access that provides continuous and long-term treatment, however, failure in maturation of the AVF and thrombosis in mature fistulas has been the main cause of morbidity and mortality in hemodialysis patients. This work aims to analyze the pressure field in a rigid wall arteriovenous fistula with variation in the anastomotic area, trying to establish a relationship between pathological regions and pressure values. From the computational modeling and 3D printing, three AVFs were made with variation in the anastomotic area, the anastomosis width (W) was fixed at 4 mm while the anastomosis length value (L) was varied by 5 mm, 6 mm and 7 mm, resulting in a cross-sectional area (AST) of 15.7 mm², 18.8 mm² and 22.0 mm² respectively. From the results obtained, it was observed that the variation in the size of the anastomosis considerably influences the pressures upstream of the anastomosis, with greater energy dissipation the shorter the anastomosis length.
Keywords
FAV, Anastomotic width, Anastomotic length, energy dissipation, pressure drop
