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heart valve prosthesis

A heart valve and prosthesis technology, applied in the field of medical devices, can solve difficult problems and achieve the effects of easy operation, easy delivery and release, and high compressibility

Active Publication Date: 2022-05-10
CHENGDU SILARA MEDTECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, during surgery, for patients with severe aortic stenosis and small annulus opening, it is more difficult to pull the proximal end of the aortic valve implant from the left ventricle through the aortic annulus and into the aorta

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0209] The material for making the proximal annular channel 8011 includes elastic material, so that the proximal annular channel 8011 has self-shrinkage.

[0210] When the proximal annular cavity 807a is in a filling state, the filling medium in the proximal annular cavity 807a generates an outward expansion force on the proximal annular cavity 807a, and the expansion force is transmitted to the proximal annular channel 8011, which can overcome the proximal annular The elastic force of the pipeline 8011 itself. The heart valve prosthesis 800 can be formed as Figure 7A The outer contour of the proximal annular duct 8011 shown is close to and slightly larger than the outer contour of the distal annular duct 8012, and can also be formed as Figure 8A The outer profile of the proximal annular duct 8011 is shown equal to the outer profile of the distal annular duct 8012 .

[0211] If both the proximal annular duct 8011 and the proximal annular cavity 807a are made of flexible ma...

Embodiment approach

[0220] Usually, the extending direction of the warp 8022 is perpendicular to the extending direction of the weft 8021 . As another embodiment, the fabric of the material for making the proximal annular duct 8011 includes a plurality of weft threads 8021 and a plurality of warp threads 8022, the weft threads 8021 extend around the circumferential direction of the annular cuff 802, and the extending direction of the warp threads 8022 is the same as that of the weft threads 8021. The included angle between the extension directions is less than 90°; and the plane surrounded by the latitude 8021 is parallel to the cross-sectional direction 882 of the annular cuff; the warp 8022 extends helically along the axial direction of the annular cuff 802, among the plurality of warp 8022 at least One is an elastic woven thread, and the elastic force of the warp thread 8022 has a circumferential component force, which can drive the weft thread 8021 to move together, so as to shrink the proxima...

Embodiment 2

[0230] Such as Figure 14A with Figure 14B As shown, the heart valve prosthesis 800 also includes an elastic band 400, which is connected to the proximal annular duct 8011 and extends along the circumferential direction of the annular cuff 802, so that the proximal annular duct 8011 has a tendency to contract inward to reduce the The circumference of the outer contour of the small proximal annular duct 8011. When the proximal annular cavity 807a is in a filled state, the elastic band 400 is in an elongated state, and has a tendency to shorten and drive the proximal annular duct 8011 to shrink together.

[0231] When the proximal annular cavity 807a is in a filled state, the filling medium in the proximal annular cavity 807a generates an outward expansion force on the proximal annular cavity 807a, and the expansion force is transmitted to the proximal annular channel 8011, which can overcome the elastic band 400 of elasticity. The heart valve prosthesis 800 can be formed as...

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PUM

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Abstract

The present invention provides a heart valve prosthesis, the heart valve prosthesis comprises: an annular cuff, which has an inner surface defining a blood flow path, and the annular cuff is provided with a proximal annular duct and a distal annular duct; the valve, which Positioned in the blood flow path and connected to the annular cuff, the valve is capable of allowing flow in the blood flow path along the direction of the distal annular duct to the proximal annular duct and preventing flow in the opposite direction in the blood flow path; connected to the annular The fillable structure of the cuff has a proximal ring cavity and a distal ring cavity, the proximal ring tube wraps the proximal ring cavity, and the distal ring tube wraps the distal ring cavity; the elastic band is connected to the proximal ring tube, And extending along the circumferential direction of the annular cuff, the proximal annular duct has a tendency to shrink inward, so as to reduce the circumference of the outer contour of the proximal annular duct.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a heart valve prosthesis. Background technique [0002] Aortic stenosis (AS) is a common cardiovascular disease, and its incidence gradually increases with age. Once symptoms appear in AS patients, the prognosis is very poor. If not intervened in time, the median survival time of patients is 2 to 3 years. [0003] Surgical Aortic Valve Replacement (SAVR) is the standard treatment for severe AS patients with indications. However, patients with advanced age and comorbidities have high surgical risks and slow postoperative recovery. According to statistics, more than one-third of severe AS patients cannot perform SAVR. [0004] Transcatheter Aortic Valve Replacement (TAVR for short) or Transcatheter Aortic Valve Implantation (TAVI for short) has the advantages of less trauma and has become a new treatment for the above patients. choose. More and more clinical studies ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/24
CPCA61F2/2442A61F2/2466
Inventor 吕守良徐磊
Owner CHENGDU SILARA MEDTECH INC