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Cardiac valve prosthesis

A heart valve and prosthesis technology, applied in the field of medical devices, can solve the problems of increasing the difficulty of delivery and the risk of vascular damage, tricuspid valve outflow tract obstruction, poor fatigue resistance, etc., to save crimping space and prevent conduction. The effect of retarding and improving fatigue resistance

Pending Publication Date: 2020-10-16
SHANGHAI TRULIVE MEDTECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The tricuspid valve also has the problem of outflow tract obstruction. Most of the existing valve stents have a single-layer structure. The stent with a single-layer structure corresponds to a larger leaflet area, and the larger the leaflet area, the worse the fatigue resistance.
At the same time, the size of the valve leaflet is large, and the size of the stent is correspondingly large, and the diameter of the catheter used to deliver the valve prosthesis will also be large, which increases the difficulty of delivery and the risk of vascular injury

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0055] This embodiment provides a mitral heart valve prosthesis, see Figure 1-Figure 10 , is a schematic diagram of the valve prosthesis of this embodiment, and the valve prosthesis includes a valve and a stent 100 .

[0056] The stent 100 includes a main body part 110 for supporting the valve and a frame part 210 for fixing the main body part 110, the main body part 110 is connected with the frame part 210; The valve ring segment 212 and the ventricular segment 213 deployed in the ventricle, the valve ring segment 212 is located between the atrial segment 211 and the ventricular segment 213 . The ventricular segment 213 includes a first ventricular segment 2131 and a second ventricular segment 2132 , the first ventricular segment 2131 is located on a side close to the left ventricular outflow tract, and the second ventricular segment 2132 is located on a side far from the left ventricular outflow tract.

[0057] On the side close to the left ventricular outflow tract, the a...

Embodiment 2

[0078] This embodiment provides a valve prosthesis, which is an improvement on the basis of Embodiment 1, wherein the frame part 210 and the main body part 110 are arranged side by side.

[0079] see Figure 11 , is a schematic diagram of the overall structure of the stent 100 of this embodiment, Figure 12 is a schematic perspective view of the stent 100 . Wherein, the main body 110 is a cylinder, the main body 110 is located outside the frame 210 , the outer peripheral side of the frame 210 abuts against the outer peripheral side of the main body 110 , and is connected at the abutment. With such a structure, the frame part 210 and the main body part 110 can produce more connection points, so that the contact area between the frame part 210 and the main body part 110 is larger, so the connection between the two will be more stable; further, the main body part 110 can be maximized. As far as possible away from the left ventricular outflow tract. Moreover, the left and right...

Embodiment 3

[0082] This embodiment provides a valve prosthesis, which is an improvement on the basis of Embodiment 1 or Embodiment 2, wherein the frame part 210 is configured as a non-closed structure.

[0083] Such as Figure 13 As shown, it is a top view of the frame part 210, the frame part 210 is a non-closed structure, and its cross section is semicircular or C-shaped. The non-closed structure can further save the material of the frame part 210, making the valve prosthesis easier to hold and transport.

[0084] Such as Figure 14 As shown, it is a schematic perspective view of the bracket of this embodiment. The frame part 210 and the main body part 110 are side by side structures, wherein the frame part 210 is an opening structure along the axial direction, and the frame part 210 is connected to the main body part at the opening. 110 peripherals are connected.

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Abstract

The invention discloses cardiac valve prosthesis. The cardiac valve prosthesis comprises a stent and a valve, wherein the stent comprises a main body part used for supporting the valve and a frame part used for fixing the main body part. According to the cardiac valve prosthesis, the main body part and the valve are fixed to a valve ring through the frame part to replace an original valve, functions of opening and closing the blood channel are realized, at the outflow tract, a first ventricular section of the frame part is away from the outflow tract, the longitudinal size of the frame part propped against the atrium and the valve ring is small, so that influence of the valve prosthesis on cardiac functions can be reduced, and conduction block can be prevented; a valve leaflet is located in the main body part of the stent, the radial size of the main body part is smaller, therefore, the size of an artificial valve leaflet is smaller, and fatigue resistance of the valve leaflet is improved; and meanwhile, the whole size of the valve prosthesis becomes small, the pressing and holding space of the outflow tract is saved, size of a needed delivery system is reduced, and loading and transportation are easy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a heart valve prosthesis for implanting in the heart. Background technique [0002] The heart has four chambers, the left atrium and left ventricle are on the left side of the heart, and the right atrium and right ventricle are on the right side of the heart. The atrium and ventricle form the ventricular inflow tract, the left ventricle and the aorta form the left ventricular outflow tract, and the right ventricle and the pulmonary artery form the right ventricular outflow tract. There are valves with the function of "one-way valve" at the left ventricular inflow tract and left ventricular outflow tract to ensure the normal flow of blood in the heart chamber. When there is a problem with this valve, the hemodynamics of the heart are altered and the heart functions abnormally, which is called valvular heart disease. [0003] Mitral regurgitation leads to myocardial remod...

Claims

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Application Information

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IPC IPC(8): A61F2/24
CPCA61F2/24A61F2/2412A61F2/2418A61F2/2442A61F2/2466A61F2220/0025A61F2220/005A61F2220/0058A61F2220/0075
Inventor 不公告发明人
Owner SHANGHAI TRULIVE MEDTECH CO LTD
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