CN-224220290-U - Tectorial membrane support

CN224220290UCN 224220290 UCN224220290 UCN 224220290UCN-224220290-U

Abstract

The utility model provides a covered stent which is of a tubular structure with two open ends, wherein the covered stent comprises a main body stent, the surface of the main body stent is provided with a surface covered film, the main body stent comprises a plurality of supporting frameworks, the supporting frameworks are arranged at intervals along the axial direction of the covered stent, two adjacent supporting frameworks are connected through the surface covered film, the covered stent also comprises a bare stent, the proximal end side of the main body stent comprises a connecting stent, the bare stent is connected with the connecting stent through a connecting rod, the arrangement of the bare stent can ensure that the two stents are parallel to each other in a straight tube section blood vessel at the bifurcation position of a bifurcated blood vessel, the generation of a closed residual cavity is avoided when the two stents are aligned in parallel, and further, when the bare stent is pressed in the radial direction, at least one circumferential side of the bare stent can deform, and after the deformation, the two bare stents can form a complete circular structure by being attached to the tube wall of the straight tube section blood vessel, the radial supporting force of the position is enhanced while the formation of the closed residual cavity is avoided.

Inventors

CHEN YINGZHEN
LU HONGXIANG
ZHU ZHIJIE

Assignees

先健科技(深圳)有限公司

Dates

Publication Date: 20260512
Application Date: 20241230

Claims (10)

1. A tectorial membrane support is characterized by being of a tubular structure with openings at two ends, the tectorial membrane support comprises a main body support, surface tectorial membranes are arranged on the surface of the main body support, the main body support comprises a plurality of supporting frameworks, the supporting frameworks are arranged at intervals along the axial direction of the tectorial membrane support, two adjacent supporting frameworks are connected through the surface tectorial membrane, the tectorial membrane support further comprises a bare support, the proximal end side of the main body support comprises a connecting support, the bare support is connected with the connecting support through a connecting rod, and at least one circumferential side of the bare support can deform when the bare support is radially pressed.
2. The stent graft of claim 1, wherein said support framework and said bare stent each comprise a plurality of hexagonal cells disposed in series in a circumferential direction, said hexagonal cells comprising at least one pair of circumferentially symmetrically disposed connecting sides, two circumferentially adjacent hexagonal cells being connected by said connecting sides.
3. A stent graft according to claim 2, wherein the two interconnecting connecting sides are connected by at least two support bars, the two support bars circumscribing the two connecting sides to form a transition grid.
4. A stent graft according to claim 2, wherein the hexagonal lattice comprises two triangular waves arranged symmetrically in the axial direction, the triangular waves comprising wave bars on both sides and connected to the connecting sides, respectively, and a shoulder for connecting the two wave bars, the shoulder comprising a dome and a transition bar for connecting the dome and the two wave bars, the width of the dome in the circumferential direction and the width of the wave bars in the circumferential direction being greater than the width of the transition bar in the circumferential direction.
5. The stent graft of claim 4, wherein said arc crown has a circumferential width greater than a circumferential width of said waver rod.
6. The covered stent of claim 1, wherein the surface covering comprises an inner surface covering and an outer surface covering, the inner surface covering being provided on the inner surface of the main body stent, the outer surface covering being provided on the outer surface of the main body stent, the inner surface covering and the outer surface covering forming a first spaced covering portion between two adjacent support frames.
7. The stent graft of claim 6, wherein said stent graft comprises struts embedded within said first spaced stent graft portion and disposed circumferentially continuously or at intervals.
8. The stent graft of claim 7, wherein the radial support force of said support member is greater than the radial support force of said first spaced stent graft.
9. The stent graft of claim 1, wherein said bare stent comprises a first support portion and a second support portion in the circumferential direction, wherein the radial support force of said first support portion is greater than the radial support force of said second support portion.
10. The stent graft of claim 9, wherein said first support portion and said second support portion each comprise half of the circumference of said bare stent.

Description

Tectorial membrane support Technical Field The utility model relates to the technical field of medical instruments, in particular to a covered stent. Background With the development of modern medical technology, implantation of endoprostheses has become a treatment for most cardiovascular diseases, and balloon-expandable stents have also become a common and important surgical treatment. The existing balloon expandable stent is required to be implanted into a blood vessel at a bifurcation part, and then the stent is required to be placed in double-side kissing by extending upwards at a bifurcation opening for obtaining a certain anchoring area in a straight opening area, so that the stent is prevented from being shifted, and at the moment, if no bare wave area exists, two stents are aligned in parallel and kissed in a lumen, a residual cavity is generated, and the residual cavity occupies the space in the cavity, and the risk of thrombosis and re-embolism is easily caused. Disclosure of utility model Based on this, it is necessary to provide a new stent graft, which can provide a bare stent at least on the proximal side to avoid the generation of a closed residual lumen when two stents are kissed in parallel. The tectorial membrane support is of a tubular structure with openings at two ends, the tectorial membrane support comprises a main body support, surface tectorial membranes are arranged on the surface of the main body support, the main body support comprises a plurality of supporting frameworks, the supporting frameworks are arranged at intervals along the axial direction of the tectorial membrane support, two adjacent supporting frameworks are connected through the surface tectorial membrane, the tectorial membrane support further comprises a bare support, the proximal end side of the main body support comprises a connecting support, the bare support is connected with the connecting support through a connecting rod, and at least one circumferential side of the bare support can deform when the bare support is radially compressed. In one embodiment, the support skeleton and the bare stent each comprise a plurality of hexagonal grids arranged continuously along the circumferential direction, each hexagonal grid comprises at least one pair of connecting sides symmetrically arranged along the circumferential direction, and two adjacent hexagonal grids in the circumferential direction are connected through the connecting sides. In one embodiment, the two connecting sides connected with each other are connected by at least two support bars, and the two support bars and the two connecting sides enclose to form a transition grid. In one embodiment, the hexagonal grid comprises two triangular waves symmetrically arranged along the axial direction, the triangular waves comprise wave rods which are positioned at two sides and are respectively connected with the connecting side edges, and shoulders for connecting the two wave rods, the shoulders comprise arc tops and transition rods for connecting the arc tops and the two wave rods, and the width of the arc tops in the circumferential direction and the width of the wave rods in the circumferential direction are larger than the width of the transition rods in the circumferential direction. In one embodiment, the width of the arc crown in the circumferential direction is greater than the width of the wave rod in the circumferential direction. In one embodiment, the surface coating includes an inner surface coating and an outer surface coating, the inner surface coating being provided on the inner surface of the main body stent, the outer surface coating being provided on the outer surface of the main body stent, the inner surface coating and the outer surface coating forming a first spaced coating portion between adjacent two of the support backbones. In one embodiment, the stent graft includes a support embedded within the first spaced stent graft and disposed circumferentially continuously or at intervals. In one embodiment, the radial support force of the support is greater than the radial support force of the first spaced apart membrane covering portion. In one embodiment, the bare stent comprises a first support portion and a second support portion in the circumferential direction, the radial support force of the first support portion being greater than the radial support force of the second support portion. In one embodiment, the first support portion and the second support portion each occupy half of the circumference of the bare stent. The utility model has the beneficial effects that compared with the prior art, the utility model provides the tectorial membrane bracket which is in a tubular structure with two open ends, the tectorial membrane bracket comprises a main body bracket, the surface of the main body bracket is provided with a surface tectorial membrane, the main body bracket comprises a plurality of supporting frameworks, the supporting frameworks