title: Ð§Ð¸ÑÐ»ÐµÐ½Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÑÑÐºÑÑÑÑ ÐºÑÐ¾Ð²Ð¾ÑÐ¾ÐºÐ° Ð² Ð¿ÐµÑÑÐ¾Ð½Ð¸ÑÐ¸ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÑ Ð¼Ð¾Ð´ÐµÐ»ÑÑ Ð¾ÑÐ²ÐµÑÐ²Ð»ÐµÐ½Ð¸Ñ ÑÑÐ½ÑÐ° Ð¾Ñ Ð±ÐµÐ´ÑÐµÐ½Ð½Ð¾Ð¹ Ð°ÑÑÐµÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Numerical analysis of the blood flow structure in personalized models of the shunt branch from the femoral artery
Creators: name: ÐÐ°ÑÐ¸Ð½Ð¾Ð²Ð°, ÐÐ»ÐµÐºÑÐ°Ð½Ð´ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐÐ¾Ð¼Ð¿ÑÑÑÐµÑÐ½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
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Ð¾ÑÑÐµÐ´Ð½ÐµÐ½Ð½ÑÐµ ÑÐ´Ð²Ð¸Ð³Ð¾Ð²ÑÐµ Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð½Ð° ÑÑÐµÐ½ÐºÐµ
Ð¸Ð½Ð´ÐµÐºÑ ÐºÐ¾Ð»ÐµÐ±Ð°Ð½Ð¸Ð¹ ÑÐ´Ð²Ð¸Ð³Ð¾Ð²ÑÑ Ð½Ð°Ð¿ÑÑÐ¶ÐµÐ½Ð¸Ð¹
femoral-popliteal bypass
proximal anastomosis
personalized models
patient-specific numerical simulation
time-average wall shear stress
oscillatory shear index

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description: According to MSCT and ultrasound velocity measurements, five personalized models of the proximal anastomosis area of the femoral artery after femoral-popliteal bypass surgery were built. Calculations of the pulsating laminar flow of an incompressible Newtonian fluid were carried out. Comparison of the calculated velocity vector field for one of the models with the data of clinical measurements by ultrasonic high-frequency vector imaging showed satisfactory agreement of the results. Postoperative hemodynamic changes were analyzed: - A significant narrowing of the femoral artery (FA) before the anastomosis and the shunt behind it due to the neointima overgrowth led to a more disturbed and heterogeneous flow; the values of the time-average wall shear stresses (TAWSS) near the anastomosis increased, and the value of oscillatory shear index (OSI) decreased throughout the model. - As a result of the expansion of the flow section of the anastomosis after plastic re-surgery with the application of a patch the TAWSS values significantly decreased near the anastomosis; at the same time, an intensive vortex flow was formed and the OSI values increased. - A decrease of the ratio of the shunt flow rate due to an increase in the peripheral resistance of the shunt branch with a slight change in geometry did not lead to significant changes in hemodynamics. In all models, an area with high TAWSS and low OSI values was identified in the lower part of the shunt branch from FA. Using the LNH helicity parameter, the formation of a single-vortex flow in the shunt was revealed, which direction is determined by the individual geometry of the anastomosis region.