Mitral valve replacement prosthesis and outer support thereof

Abstract

The invention discloses a mitral valve replacement prosthesis and an outer support thereof, and belongs to the field of heart valve replacement prostheses. The outer stent comprises an atrium fixing section located in an atrium, a mitral valve annulus plugging section and a mitral valve replacement prosthesis inner stent connecting section located in a cardiac chamber, and the upper edge of the atrium fixing section and the lower edge of the inner stent connecting section are both circular or quasi-circular. The cross section of the mitral valve annulus plugging section is of a wavy D-shaped structure. The connecting rod in the inner support connecting section comprises at least one wavy connecting rod. At least two same or two different marking points are arranged on the petal structure of the atrium fixing section. Through the arrangement of the wavy D-shaped structure and the wavy rectangular structure, circumferential rotation and up-down displacement are effectively prevented, and the service life of the prosthesis is prolonged. And by arranging the elastic wavy connecting rod, the production and processing success rate is increased, the service life is prolonged, by adding the mark points, recognition is easier in the operation process, and the operation efficiency and success rate are improved.

Description

technical field [0001] The invention relates to the field of heart valve replacement prosthesis, in particular to a mitral valve replacement prosthesis and its outer support. Background technique [0002] Human valvular disease is a very serious heart disease with a large number of patients and a high fatality rate. Currently, there is no conservative treatment such as specific drugs. Surgical treatment is the best solution, such as surgical valve replacement or interventional Surgical repair or valve replacement. In surgical treatment, interventional surgery has been recognized by doctors and patients for its advantages of low surgical risk, minimally invasive, and good therapeutic effect. [0003] At present, well-known medical device manufacturers at home and abroad, such as Medtronic, Abbott, Edwards, Minimally Invasive, Qiming, Peijia, etc., have launched products for interventional valve replacement, and have achieved good therapeutic effects. Among them, Abbott's ten...

AI Technical Summary

Problems solved by technology

However, the design of the D-shaped anatomical structure has the following problems: first, because the two sides of the occlusion section B of the outer stent are straight sides, the outer stent can move up and down, so the fixation of the outer stent depends on being located in the atrium. The role of the petal-shaped atrial fixed segment A and the apical pad located at the apex of the heart

Second, although the outer stent has a D-shaped structure and has a certain anti-rotation effect, because the mitral valve annulus is relatively soft and the outer wall is relatively smooth, there is a problem whether the prosthesis is installed or used. possible circumferential rotation

In principle, the exact position of the valve prosthesis can be calculated as long as the marking point o is located on the straight side of the D shape. However, one marking point will make the doctor have to remember firstly whether the marking point is on the straight side or the round side , is it on the left or the right, is it the left and right side we see, or the left and right side of the prosthesis itself, it is very easy to remember

At the same time, one marking point will bring some troubles in production. The exact position of the marking point must be given. If you are not careful, it is easy to make mistakes in processing, resulting in an increase in the scrap rate. Once such waste products are misused, it may cause Failure of the operation, severe cases may lead to death of the patient

[0005] In addition, if the design is carried out according to the unfolded shape of the existing laser cutting diagram of the outer bracket, it will inevitably cause the mutual pulling and deformation of each unit cell of the outer bracket, and at the same time, a certain height change will occur, and even fracture will occur

If the design is not according to the expansion diagram, but if the connecting rods of the connecting section of the inner bracket are designed to be long and short, when the inner and outer brackets are assembled and shrink, the inner and outer brackets will be pulled due to the different lengths, and individual positions will be affected by stress. Excessive deformation, resulting in fracture

[0006] This shows that the above-mentioned existing mitral valve replacement prosthesis obviously still has inconvenience and defects in structure, method and use, and needs to be further improved urgently.

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