Stenosis At The Wall Deformation And Stress Analysis

Cardiovascular fluid mechanics to cardiovascular system in the flow of blood andblood vessel wall deformation as the research object, is a used in blood circulationsystem coupling mechanics. Home and abroad of this research field in cardiac cycle ismainly for blood in veins of the flow velocity and flow rate, nonlinear dynamic analysisand numerical simulation of fluid flow in a local narrow tube, and mechanical propertiesof blood vessels. Most of these researches are not involved in the research of the bloodvessels to narrow wall deformation, stress analysis, and blood vessel wall deformationand stress analysis on the narrow part of stent after being implanted. Therefore, the localstricture formation, development, the effects on blood flow and correct installation of thecardiovascular artery, are important parts of fluid mechanics researchThis paper focuses on the narrow wall vessels to solve deformation and hoop stressstate with elementary theory knowledge of cardiovascular fluid mechanics. The objectiveof the study is that for cardiovascular disease in the clinical treatment to providescientific theory.According to the theory of knowledge, the arteries of the pulse derived flow basicequations is studied based ob simplifying Navier-Stokes equation and the artery wallmotion equation. Through analyzing the solution of the equation, blood flow velocity andpulse pressure formula are observed. This paper discussed in detail the blood vessel walldeformation and the change of hoop stress, while before and after stent, and the pulsewave in a cardiac cycle with various stenosis degrees. A series of relation curves aremapped by using MATLB. In different narrow degree, the calculation method and theresults of support are gained,and also discussed the conditions and parameters ofcorrectly stent.Through this research, influence reason on narrow vascular wall deformation and tothe size of hoop stress is studied as follows: the factors of the blood vessel wall elasticmodulus, thickness, blood vessels, and the extent of the local stricture radius, localpatches of hardness, etc. The results studied in this paper are for clinical research of blood vessels deformation and stress analysis after stent, and correct installation ofsupport, thus can avoid serious blocking or vascular rupture, which dues to improperstent when vascular calcification.