In-vitro performance testing system and testing method of transcatheter bicuspid valve valved stent

Abstract

In vitro performance testing system and testing methods for transcatheter mitral valve stents, involving implantable prostheses, in particular testing devices and testing methods for performance testing of heart valves, including valves with built-in mitral valve stents Test parts, liquid circulation device and monitoring device; the first test part is a heart sample with a circulation inlet at the apex of the left ventricle, and the second test part is a section of artificial blood vessel or blood vessel sample for suturing the tested mitral valve stent; liquid circulation device It is connected with the first test part to form a first test circulation path of steady flow circulation or a second test circulation path that simulates human ventricular pulsation; the liquid circulation device is connected to the second test part to form a third test circulation path connected by circulation side branches, It can realize the in vitro test of the hydrodynamic performance of the mitral valve stent, stent fixation state, valve regurgitation, paravalvular leakage, and the impact on the surrounding important tissue structure, and complete the durability test of the mitral valve stent.

Description

technical field [0001] The invention relates to a prosthesis that can be implanted in the body, in particular to a test device and a test method for testing the performance of heart valves. Background technique [0002] Mitral valve disease is one of the major heart diseases at present. It has various causes such as rheumatic, degenerative and congenital. Surgical valve replacement is the main means of treatment for patients with mitral valve disease. The technology of valve replacement surgery is mature, reliable and The effect is certain. However, the trauma is large and the risk is high. With the gradual promotion and use of percutaneous aortic valve replacement in clinic, the research on percutaneous mitral valve replacement has also aroused great interest. The anatomical structure of the mitral valve is complex, the positioning and fixation of the interventional artificial valve is difficult, and it is easy to injure the chordae or papillary muscles. Postoperative comp...

AI Technical Summary

Problems solved by technology

However, the trauma is large and the risk is high. With the gradual promotion and use of percutaneous aortic valve replacement in clinic, the research on percutaneous mitral valve replacement has also aroused great interest.

The anatomical structure of the mitral valve is complex, the positioning and fixation of the interventional artificial valve is difficult, and it is easy to injure the chordae or papillary muscles. Postoperative complications such as paravalvular leakage and left ventricular outflow tract stenosis are easily formed. research is relatively difficult

[0008] 1. Interventional pulmonary valve stents and interventional aortic valve stents are circular in design, while the overall shape of mitral valve stents is often a saddle-shaped design, which does not fully conform to the circular structure of blood vessels; the test site is artificial The design of the left ventricle, aorta, and coronary artery can only be used to test the characteristics of the aortic valve stent at the aortic valve position, and cannot be used for the implantation site at the junction of the left atrium and the left ventricle (ie, the mitral valve location) of mitral valve stents for testing

[0009] 2. Since

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