Biomechanical experiment simulation device for implantation of intravascular stent

Abstract

The invention discloses a biomechanical experiment simulation device for implantation of intravascular stent, which consists of an artificial cardiovascular system, an artificial blood and pulsatile blood flow field control system and a mechanical experiment observation device. The upper part of a liquid storage box of the artificial cardiovascular system is soaked in a silica gel ventriculus sinister model geometrically similar to the ventriculus sinister; the inlet end of the silica gel ventriculus sinister model is connected with the open liquid storage box through a silica gel hollow round ball simulating the right atrium; the outlet end of the silica gel ventriculus sinister model is connected with an aortic arch model; a microcomputer of the artificial blood and pulsatile blood flow field control system is connected with a power amplifier, a linear step motor and a piston in turn; and artificial blood with similar blood viscosity and specific gravity and containing simulated thrombus particles polystyrene microspheres is arranged in a closed-loop blood flow field model. Through the device, a simulated operation for stent implantation can be effectively and visually preformed between the clinical experiments and animal experiments on the intravascular stent, and effective biochemical evaluation on the flexibility, strength and stability of the stent can be realized.

Description

technical field [0001] The invention relates to a percutaneous puncture implantation type stent implantation operation, belongs to the technical field of medical device performance testing, and particularly relates to an experimental simulation device for biomechanical property testing of vascular stent implantation. Background technique [0002] According to the "Global Burden of Disease 2004" released by the World Health Organization, cardiovascular disease is the main cause of death in the world. In 2004, about 7.2 million patients died of ischemic heart disease worldwide, accounting for 12.2% of the total mortality rate. It ranks first among the 20 common mortality diseases. In the "2008 China Health Statistical Yearbook", the Ministry of Health of China analyzed the main disease mortality rate of Chinese urban residents in 2007 and showed that the mortality rate of heart disease was 16.29%, ranking third only after malignant tumors and cerebrovascular diseases. Cardiov...

AI Technical Summary

Problems solved by technology

In the wide clinical application, some disadvantages of intravascular stents have emerged. Thrombus formation in the stent causes vascular restenosis. In addition to the patient itself and the cause of the disease, there are mainly many technical problems, such as poor expansion of the stent, poor apposition, Stent overlap, stent collapse, too small final lumen after stent implantation and poor material biocompatibility, etc.

Images