Numerical simulation of the branching blood flow in a model of the femoral artery-graft junction

Abstract

Annotation The results of numerical simulation of pulsating blood flow in a three-dimensional model of the femoral artery-graft junction are presented. The study is focused on the influence of the flow rates ratio in two branches of the branching flow on the location and size of the recirculation flow areas in the shunt and in the common femoral artery, with an emphasis on the analysis of the anastomotic zone. Areas with small values of the cycle-averaged shear stresses and increased values of the shear stress oscillation index, potentially dangerous from the point of view of the neointima growth in the shunt, are identified.

V Flow Measurements of Pulsatile Flow in Femoral-Popliteal Bypass Proximal Anastomosis Compared with CFD Simulation

“…The simplified geometric model of a proximal anastomosis section after the femoral popliteal bypass surgery used in this work was developed based on the averaging of 15 personalized models obtained by slice-by-slice segmentation of multispiral computed angiography images [16]. For the processed personalized models, the diameter of the CFA was 7.5 ± 1.2 mm, the diameter of the graft was 9.5 ± 1.2 mm, the diameter of DFA was 4.2 ± 1.1 mm, the angle of the graft branch from the CFA was 45 ± 25 • , and from the DFA was 44 ± 25 • .…”

“…personalized models obtained by slice-by-slice segmentation of multispiral computed angiography images [16]. For the processed personalized models, the diameter of the CFA was 7.5 ± 1.2 mm, the diameter of the graft was 9.5 ± 1.2 mm, the diameter of DFA was 4.2 ± 1.1 mm, the angle of the graft branch from the CFA was 45 ± 25°, and from the DFA was 44 ± 25°.…”

“…The computational grid generated for the personalized model consisted of 2 million elements. Using the procedures described in our previous reports [15][16][17], a personalized geometric model of the proximal anastomosis area of the patient, for whom an examination was carried out in the University clinic 7 months after the operation, was built based on data of MSCT angiography. This personalized model is illustrated in Figure 6a.…”

“…Ultrasound (US) methods for blood flow analysis are used mainly in clinical studies [13]. To obtain knowledge that is useful for the early prediction of dangerous postoperative complications, numerical calculations are performed for personalized anastomosis models based on magnetic resonance imaging (MRI) [14], US and multispiral computed tomography (MSCT) data [15][16][17].…”

“…The measurement results presented in the present work were obtained using the V Flow vector visualization program implemented in the Mindray Resona 7 scanner (Shenzhen Mindray Bio-Medical Electronics Co., Ltd., Shenzhen, China). The V Flow technique is based on multi-directional Doppler US using an interleaved plane wave and focused wave transmissions [16]. The blood flow structure after short-term scanning at high frame rates and short post-processing is presented in the form of a non-stationary 2D vector velocity field in the scanning window.…”