Simulation of blood flow into the popliteal artery to explain the effect of peripheral arterial disease: Investigation the conditions and effects of different foot states during the daily activity of the patient

Aliakbar Karimipour; Hamed Mokhtari; Mohammad Akbari; Davood Toghraie; Arash Karimipour

doi:10.1016/j.cmpb.2020.105638

Simulation of blood flow into the popliteal artery to explain the effect of peripheral arterial disease: Investigation the conditions and effects of different foot states during the daily activity of the patient

Comput Methods Programs Biomed. 2020 Oct:195:105638. doi: 10.1016/j.cmpb.2020.105638. Epub 2020 Jul 2.

Authors

Aliakbar Karimipour¹, Hamed Mokhtari², Mohammad Akbari³, Davood Toghraie², Arash Karimipour⁴

Affiliations

¹ Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.
² Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran.
³ Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
⁴ Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam. Electronic address: arashkarimipour@tdtu.edu.vn.

PMID: 32645626
DOI: 10.1016/j.cmpb.2020.105638

Abstract

Background and objective: Peripheral artery disease, one type of atherosclerosis, is a common medical condition in the world that results from plaque build-up in the peripheral blood vessels. The symptoms of this disease are the senses of pain and weakness in outer muscles.

Methods: The artery under consideration is called the popliteal artery. In this model, the blood flow is considered as pulsating. Therefore the inlet boundary condition is taken as unsteady velocity, and the outlet boundary condition is taken the outflow. The inlet boundary condition represents the increasing systole flow and the decreasing diastole flow, which occur naturally in blood flow. Systolic flow occurs when the heart contracts and pumps blood into the arteries. The inlet blood flow is in the form of a sine-cosine parabolic profile.

Results: The artery bends from the middle at an angle of 45°. As the bending of the artery begins, the flow field also takes a bent form. At this point, the flow bends from the outside of the top wall and enfolds the bottom wall in its bending. For different periods, the popliteal flow is closer to the lower bend when the inlet velocity is more significant. While the top wall experiences a low-intensity region along the bend, the bottom wall experiences the same effect just before and after the bend. As the blood flows along the bend, the flow path becomes significantly curved near the bend, similar to the model. The clotted artery exhibits a large increase in flow due to a reduction in the cross-section as a result of the clotting in half of the artery. The flow before the clotting is not considerably different from the main model of the straight artery.

Conclusions: Like shear stress, the pressure drop has a linear relationship with the blood HCT and, hence, the viscosity. The pressure drop decreases with the inlet velocity reaching its maximum value and then increases with the start of the acceleration reduction in the second and third-time steps. This indicates that the pressure drop has a stronger relationship with the acceleration than the inlet velocity.

Keywords: Clotted artery; Popliteal flow; Pressure drop; Sine-cosine parabolic profile.

MeSH terms

Blood Flow Velocity
Computer Simulation
Hemodynamics
Humans
Models, Cardiovascular
Peripheral Arterial Disease*
Popliteal Artery
Stress, Mechanical