Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
NUMERICAL AND ANALYTICAL ANALYSES OF THE PLATELET LYSIS INDEX AND HEMOLYSIS FOR EFFICIENCY EVALUATION OF CENTRAL VENOUS CATHETERS
Submission Author:
Raphael Machado Cezar , RS
Co-Authors:
Raphael Machado Cezar, Guilherme Henrique Fiorot
Presenter: Raphael Machado Cezar
doi://10.26678/ABCM.COBEM2021.COB2021-2217
Abstract
Hemodialysis is a procedure applied mainly to patients with kidney diseases and consists of filtering the blood with external equipment. One of the most widely used forms of access is the Central Venous Catheter (CVC), which has different geometries from each manufacturer. The objective of this study is to evaluate the efficiency of a catheter through the platelet lysis index (PLI) and the particle’s percentage under high shear stress which can increase the blood cell lysis. In this study, numerical simulations were performed on catheters with different side holes geometries for comparison with a no side holes model considering blood as a non-Newtonian fluid. The analyses were performed with ANSYS Fluent and post-processed with MATLAB to obtain the velocity and shear stress contour, as well the effects of these parameters on the particles inside the domain to simulate the blood cells and to evaluate the PLI and blood cell lysis. The best results were obtained for the no side holes, straight side holes, and conical side holes 1 catheters, with low PLI. The lowest efficiency was observed for the oblique side holes 1 and conical side holes 2 catheters.
Keywords
CFD, Simulation, Blood flow, central venous catheter, Hemolysis, Platelet lysis Index, PLI, Shear Stress, Residence Time
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