Effect Of Sand Therapy On Curved And Conical Femoral Artery Pulsation Hemodynamics Based On Bidirectional Coupling

In this paper,the effects of sand therapy on femoral artery hemodynamics were studied.On the basis of theoretical analysis and experiments,the hemodynamic characteristics of curved femoral artery and conical femoral artery under sand therapy were numerically simulated.Thirty-five patients with knee osteoarthritis hospitalized in the Uygur Hospital of Turpan,Xinjiang,were treated with sand embedding every day at the prescribed time.The results of knee joint function evaluation and hemorheological indexes of each patient before and after sand therapy were collected and analyzed statistically.The results showed that sand therapy had a good effect on the treatment of knee osteoarthritis.The effect has been improved not only in terms of intuitive pain perception,but also in terms of changes in hemorheological indicators.The femoral artery curved blood vessel was selected,and the two-way coupled movement of blood and vessel wall was adopted.The pulsating blood flow velocity of human femoral artery was taken as the entry boundary condition under the condition of sand therapy.The blood flow in the femoral artery curved blood vessel before and after sand therapy was simulated by ANSYS software.The results showed that the maximum velocity increased by 22.76% after sand therapy,and the bending segment of femoral artery was low after sand therapy.The wall shear stress increased by 12.32%.After sand therapy,the blood flow near the vascular wall accelerated and the phenomenon of secondary flow weakened,which indicated that sand therapy could effectively prevent atherosclerosis diseases.Then the femoral artery conical vessels were selected for hemodynamic study.The blood flow in the femoral artery conical vessels before and after sand therapy was simulated by using ANSYS software.The results showed that the blood flow velocity increased gradually with the increase of the conicity,but it was lower at the bend.After sand therapy,the wall shear stress of the vessels increased gradually.The maximum value of Von Mises Stress decreased by 8.32%.The change of Von Mises Stress stress in conical vascular bend was obvious.With the increase of conicity,the Von Mises Stress stress increased gradually,which played a positive role in preventing and improving vessel wall thickening,atherosclerosis and thrombosis.