Abstract:
The three-dimensional unsteady-state periodic flow of blood in xenogenic vascular bioprostheses is simulated using computational fluid dynamics methods. The geometry of the computational domain is based on microtomographic scanning of bioprostheses. To set a variable pressure gradient causing a non-stationary flow in the prostheses, personal-specific data of the Doppler-echography of the blood flow of a particular patient are used. A comparative analysis of the velocity fields in the flow areas corresponding to three real samples of bioprostheses with multiple stenoses is carried out. In the zones of stenosis and outside of them, the distribution of the near-wall shear stress, which influences the risk factors for thrombosis in the prostheses, is analyzed. An algorithm for predicting the hemodynamic effects arising in vascular bioprostheses, based on the numerical modeling of a blood flow in them, is proposed.
This work was supported by the Complex Program of Basic Research of the Siberian Branch of the
Russian Academy of Sciences (project no. 26 “Biodegradable small-diameter vascular graft modified by
functionally active peptides”) and by the Complex Program of Basic Research of the Siberian Branch
of the Russian Academy of Sciences within the framework of the fundamental topic of the Kemerovo
Cardiology Center no. 0546-2015-0011 “Pathogenetic justification of the development of implants for
cardio-vascular surgery on the basis of biocompatible materials with implementation of the patientoriented approach involving mathematical modeling, tissue engineering, and genome predictors.”
Citation:
V. G. Borisov, Yu. N. Zakharov, Yu. I. Shokin, E. A. Ovcharenko, K. Y. Klyshnikov, I. N. Sizova, A. V. Batranin, Y. A. Kudryavtseva, P. S. Onishchenko, “A numerical method for predicting hemodynamic effects in vascular prostheses”, Sib. Zh. Vychisl. Mat., 22:4 (2019), 399–414; Num. Anal. Appl., 12:4 (2019), 326–337