Mechanical Damage Evaluation of Living Tissue in Vascular Therapy

摘要

Cardiovascular system plays an important role in medical diagnosis and disease therapy, yet mechanical vascular injury in clinical treatment may cause serious medical accident. In present paper, stress-strain behavior of blood vessel and surrounding tissues is analyzed, and damage criterion based on equivalent strain and damage function is employed to evaluate the capacity of vessel wall subjected to external mechanical loads during the course of clinical treatment. The results illustrate the gradual experience and evolution process of vascular failure at damage stage, which are significantly different from nonlinear elastic simulation. It can thus be concluded that mechanical damage assessment need be considered for the vascular disease therapy to the scheme of treatment protocols and design of medical equipments.