CN-224220291-U - Tectorial membrane support of cladding electrostatic spinning membrane

CN224220291UCN 224220291 UCN224220291 UCN 224220291UCN-224220291-U

Abstract

The utility model provides a film-covered stent coated with an electrostatic spinning film, which comprises a metal stent and a film, wherein the metal stent is composed of a spiral metal wire, the metal wire is provided with a plurality of bending parts which are uniformly arranged and connected end to end, two adjacent bending parts are respectively in a wave crest shape and a wave trough shape, the metal wire is in a wave shape by the bending parts, the film is coated on the surface of the metal stent to form a tubular structure, and the tubular structure can be kept shaped after bending deformation at a lesion position so as to adapt to the shape of the lesion position. The covered stent has high specific surface area and adjustable porous structure, the micron-sized pore diameter of the covered stent can effectively prevent blood permeation, the high porosity allows a proper amount of tissues or cells to penetrate, and vascularization and tissue integration of the covered stent after implantation are promoted, so that the covered stent is beneficial to reducing the risk of stent displacement or instability.

Inventors

LIU GUOZHONG

Assignees

上海金瀚腾科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250411

Claims (5)

1. A film covered bracket for covering electrostatic spinning film is characterized by comprising a metal bracket and a film, wherein the metal bracket is composed of a spiral metal wire, the metal wire is provided with a plurality of bending parts which are uniformly arranged and connected end to end, two adjacent bending parts are respectively in a wave crest shape and a wave trough shape, the metal wire is in a wave shape by the bending parts, the film is covered on the surface of the metal bracket to form a tubular structure, Wherein, the tubular structure can keep the shaping after bending deformation at the lesion position so as to adapt to the shape of the lesion position.
2. The electrospun membrane coated stent of claim 1 wherein: wherein the metal wire is made of nickel-titanium alloy material, cobalt-base alloy material or stainless steel material.
3. The electrospun membrane coated stent of claim 1 wherein: wherein the coating is an electrostatic spinning fiber membrane.
4. The electrospun membrane coated stent of claim 1 wherein: Wherein the coating film is coated on the surface of the metal bracket through an electrostatic spinning process.
5. The electrospun membrane coated stent of claim 1 wherein: Wherein the thickness of the coating film is 10-100 μm, and the aperture is 0.8-10 μm.

Description

Tectorial membrane support of cladding electrostatic spinning membrane Technical Field The utility model relates to the technical field of medical instruments, in particular to a film covered stent covered by an electrostatic spinning film. Background The covered vascular stent is a medical instrument for treating vascular lesions such as aneurysms, vascular stenosis or arterial dissection, combines a metal stent and an artificial membrane covered on the metal stent, wherein the metal stent is attached to the inner wall of a blood vessel to provide support for a lesion area, the covered artificial membrane can form a physical barrier to effectively prevent blood leakage, and meanwhile, good mechanical strength and toughness are provided for the stent, so that abrasion and stress concentration of a stent structure are reduced. For aneurysms, covered stents can prevent rupture of the tumor body, while for arterial stenosis, covered stents help to maintain blood flow. The existing covered stent is generally made of woven fabrics and then combined with a metal stent by means of stitching, hot pressing, adhesion, hot melting and the like, wherein stitching is the most commonly used process. A stent graft and its release device, as disclosed in the prior art with publication number CN118490414a, is formed by joining a metallic stent and a stent graft together by stitching. However, the manual suturing process is complex and it is difficult to ensure uniformity of the covering film, and particularly on a curved surface or a stent with a complex geometry, the problem of uneven covering or uneven suturing may occur. Second, the suture may cause blood to coagulate in a localized area, forming a thrombus. The prior art has certain limitations. Disclosure of utility model The present utility model has been made to solve the above-described problems, and an object of the present utility model is to provide a film-coated stent coated with an electrospun film. The utility model provides a film-covered stent coated with electrostatic spinning film, which is characterized by comprising a metal stent and a film, wherein the metal stent is composed of a spiral metal wire, the metal wire is provided with a plurality of bending parts which are uniformly arranged and connected end to end, two adjacent bending parts are respectively in a wave crest shape and a wave trough shape, the metal wire is in a wave shape by the bending parts, the film is coated on the surface of the metal stent to form a tubular structure, Wherein, the tubular structure can keep shaping after bending deformation at the lesion position so as to adapt to the shape of the lesion position. The film-coated stent coated with the electrostatic spinning film can also be characterized in that the metal wire is made of any one material of nickel-titanium alloy, cobalt-based alloy or stainless steel. The film-coated stent coated with the electrostatic spinning film can also be characterized in that the film is an electrostatic spinning fiber film. The film-coated stent coated with the electrostatic spinning film can also have the characteristic that the film is coated on the surface of the metal stent through an electrostatic spinning process. The film-coated stent coated with the electrospun film can also be characterized in that the thickness of the film is 10-100 mu m, and the aperture is 0.8-10 mu m. Effects and effects of the utility model According to the film covered stent coated with the electrostatic spinning film, because the film is the electrostatic spinning fiber film, the film covered stent has a high specific surface area and an adjustable porous structure, the micron-sized pore diameter of the film covered stent can effectively prevent blood permeation, the high porosity allows a proper amount of tissues or cells to penetrate, and vascularization and tissue integration of the stent after implantation are promoted, so that the risk of stent displacement or instability is reduced. And because the coating is coated on the surface of the metal bracket through an electrostatic spinning process, the coating can adapt to the bracket surface with a complex shape, can realize high-precision coating according to the complex shape of the metal bracket, and forms a uniform and compact coating on the bracket surface. Drawings Fig. 1 is a schematic structural view of a stent coated with an electrostatic spinning film according to the present utility model. Reference numerals illustrate: 1. and 2, a metal bracket and a coating film. Detailed Description In order to make the technical means, the creation features, the achievement of the purpose and the effect of the present utility model easy to understand, the present utility model is specifically described below with reference to the accompanying drawings. Examples Fig. 1 is a schematic structural view of a stent coated with an electrostatic spinning film according to the present utility model. As shown in fig. 1,