Intrusive type heart valve prosthesis and preparation method thereof

An artificial heart valve, interventional technology, applied in the direction of heart valves, etc., can solve the problems of short occurrence time and unsatisfactory use effect, and achieve the effect of preventing paravalvular leakage, small resistance, and avoiding blood reflux

Active Publication Date: 2015-07-15
SHANGHAI NEWMED MEDICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively short time of this technology, there are still many problems, and the use effect is not ideal.

Method used

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  • Intrusive type heart valve prosthesis and preparation method thereof
  • Intrusive type heart valve prosthesis and preparation method thereof
  • Intrusive type heart valve prosthesis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An interventional prosthetic heart valve, comprising a radially stretchable elastic support, a covering film and at least two leaflets, the covering film is sutured on the inner or outer wall of the support, and the leaflets are arranged on the support In the cavity of the valve leaflet, the lower edge of the valve leaflet is sutured on the membrane, and the adjacent side edges of two adjacent valve leaflets are stitched together, and the side edges are sutured on the support. This structure can well replace the function of the natural valve and effectively avoid blood reflux. The elastic bracket is not only easy to load into the delivery device, but also easy to be quickly released to the target position and tightly combined with the surrounding tissue of the target position. It is convenient for installation and delivery. The stent is tightened and packed into a delivery device with limited volume, and it can be quickly stretched after being released from the delivery ...

Embodiment 2

[0091] An interventional prosthetic heart valve, comprising a radially stretchable elastic support, a covering film and at least two leaflets, the covering film is sutured on the inner or outer wall of the support, and the leaflets are arranged on the support In the cavity of the valve leaflet, the lower edge of the valve leaflet is sutured on the membrane, and the adjacent sides of two adjacent valve leaflets are stitched together, and the side edges are sutured on the bracket. The elastic bracket is as follows: Figure 1 to Figure 3 As shown, the stent structure 6 is composed of a closed grid support unit, and the stent 6 includes: a delivery connection part 1, a support unit 7, a leaflet suture hole 2, a leaflet nadir developing hole 3, an upper suture hole 4, and a lower suture hole 5. Developing ball 8; bracket 6 is made of a nickel-titanium tube through laser cutting and heat treatment. After the stent 6 is shaped, it consists of two parts, one part is a tubular structur...

Embodiment 3

[0101] In the interventional heart valve described in Example 2, a barb structure is added to the elastic stent, and the barb extends from the tubular structure part to the skirt-shaped opening structure part and is inclined to the outside of the stent, such as Figure 6~8 shown.

[0102] As an optional manner, the included angle between the barb and the outer surface of the bracket is 10-80 degrees, and further the included angle is 45 degrees.

[0103] As an optional manner, the barbs are arranged at the junction between the bottom row of mesh structure units in the tubular structure portion.

[0104] As an option, the end of the barb is wedge-shaped or needle-shaped.

[0105] As an optional manner, the barbs are straight, "V" or "U". Such as Figure 9 shown.

[0106] As an optional manner, the barb is provided with a developing site. Such as Figure 9 mentioned.

[0107] As an optional manner, the developing site includes a developing hole and a developing medium fil...

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PUM

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Abstract

The invention discloses an intrusive type heart valve prosthesis and a preparation method thereof, and belongs to the technical field of intrusive type medical apparatuses. The intrusive type heart valve prosthesis comprises an elastic bracket, a covering film and at least two valves, wherein the elastic bracket can extend and retract along the radial direction, the covering film is sewed onto the inner wall or the outer wall of the bracket, the valves are arranged in a cavity of the bracket, the lower edge of each valve is sewed onto the covering film, the adjacent sides of the two adjacent valves are mutually spliced, and the side edges of the valves are sewed onto the bracket. The intrusive type heart valve prosthesis has the advantages that the function of natural valves can be well replaced; by adopting the elastic bracket, the valve structure can be conveniently loaded into a conveying device, and can also be conveniently released to the target position to be tightly combined with the surrounding tissues of the target position; the bracket is coated by the covering film, so the surrounding leakage of the valves is effectively prevented; the bionic degree of the sewing structure of the valve and the covering film is high, the natural valves can be well simulated, and the function of the natural valves is replaced; the structure is stable and firm, the durability and firmness are realized, the elastic extending and retracting requirements in the loading and release processes can be met, and the damage is avoided.

Description

technical field [0001] The invention belongs to the technical field of interventional medical devices, and in particular relates to an interventional artificial heart valve and a preparation method thereof. Background technique [0002] The heart is a very important organ of the human body, which provides power for the blood circulation of the human body. The heart is divided into two parts, the left and the right. Each part contains a ventricle and an atrium. There are valves between the atria, ventricles, and arteries that prevent blood from flowing back. The valve between the left atrium and left ventricle is the mitral valve, the valve between the right atrium and right ventricle is the tricuspid valve, the valve between the left ventricle and the aorta is the aortic valve, and the valve between the right ventricle and the aorta is the aortic valve. The valve between the pulmonary arteries is the pulmonary valve. [0003] The above-mentioned valves will open and close ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/24
Inventor 虞奇峰王海山秦涛
Owner SHANGHAI NEWMED MEDICAL CO LTD
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