Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Evaluation of Hemolytic Potential by Eulerian Approach in Central Venous Access for Hemodialysis
Submission Author:
Matheus Carvalho Barbosa Costa , MG
Co-Authors:
Matheus Carvalho Barbosa Costa, Saulo Gonçalves, Mário Silva, Thabata Lucas, Rudolf Huebner
Presenter: Matheus Carvalho Barbosa Costa
doi://10.26678/ABCM.COBEM2021.COB2021-1459
Abstract
Despite some advantages over others vascular access methods, the use of central venous catheter (CVC) has been associated with risks for patient health, such as hemolysis. The aim of the present work is to evaluate the hemolytic potential of the blood flow by numerical simulations in central venous catheter for hemodialysis by Eulerian approach. The simulations were carried out in transient regime covering two cardiac cycles. The geometry of central veins was obtained by computed tomography images of a healthy 74-year-old male patient. It was used a CVC MedCOMP/HEMO-CATH model with a dialysis flow of 0.0053 kg/m3. The K-ω SST (Shear Stress Transport) was used to model turbulence and the Carreau-Yasuda model of non-Newtonian fluid for blood behavior was adopted. Linear hemolysis index (HIL) power law model was implemented as a transport equation. It was observed that the HIL was critical close to the venous orifices of the catheter due to disturbances in the blood flow, such as increased shear stress and recirculation, generated by the outflow jets and the presence of the catheter. The Eulerian approach proved to be a qualitatively useful tool in the development of central venous catheter design.
Keywords
hemodialysis, Central Venous Access, central venous catheter, Hemolytic Potential, Computational Fluid Dynamics, Blood flow
