CN211583280U

CN211583280U - Coated plugging device

Info

Publication number: CN211583280U
Application number: CN201921569046.XU
Authority: CN
Inventors: 王梓曼
Original assignee: Zhuhai Yixin Medical Technology Co ltd
Current assignee: Zhuhai Radisson Medical Technology Co.,Ltd.
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-09-29
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a coated plugging device, which comprises a left disc and a right disc, wherein a waist is arranged between the left disc and the right disc, and the edge position of the left disc is bent towards the waist to form an arc-shaped bent edge and an inner side flanging; the left disc extends to the inner side flanging edge from the center of one side of the right disc in a reverse direction and is defined as the outer surface of the left disc, the joint of the left disc and the waist extends to the inner side flanging edge and is defined as the inner surface of the left disc, and the outer surface of the left disc is coated with a flow resistance film; through the left disc of the coating of the current-resisting film, endothelium can be adhered to and climb on the outer surface of the left disc more easily, endothelialization time of the plugging device is shortened, direct contact between metal wires of the left disc and blood is avoided, release of metal ions can be effectively slowed down, the current-resisting film can be reduced in abrasion of the current-resisting film when the current-resisting film is in a conveying state in cooperation with arc bending edges and inner side flanging, and integrity of the current-resisting film is protected.

Description

Coated plugging device

Technical Field

The utility model relates to a medical appliance, in particular to a coated occluder.

Background

Common congenital heart diseases comprise structural heart diseases such as patent foramen ovale, patent ductus arteriosus, ventricular septal defect and atrial septal defect, and the like, and the traditional treatment modes such as surgical operation and the like are generally adopted, so that great trauma is brought to a patient. At present, there are minimally invasive treatment methods, and there are many corresponding types of heart septal defect occluders for treating corresponding congenital heart diseases, and such occluders are generally delivered to specific positions of heart septal defects of patients through femoral veins or femoral arteries by catheters and guide wires.

At present, the heart septal defect occluder used in clinic is a common occluder with a left-right double-disc structure. The anatomical structures of the defect positions of different congenital heart diseases are different in shape and thickness, the left disc and the right disc after the occluder is released cannot be well attached to the left side and the right side of the heart interval position generally, the disc surface of the occluder is made of metal, a plurality of grids or gaps are formed on the surface of the occluder, the adhesion and creeping covering of endothelial cells on the occluder are difficult, and the endothelialization process after the occluder is finally implanted is not ideal in a short term and a long term; in addition, the metal wire exposed on the disk surface of the occluder is in direct contact with blood, so that the metal wire can be corroded and the release of metal ions is accelerated.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a cladding type plugging device.

The utility model provides a technical scheme that its technical problem adopted is:

the coated occluder comprises a left disc and a right disc, wherein a waist is arranged between the left disc and the right disc, and the edge of the left disc is bent towards the waist to form an arc-shaped bent edge and an inner side flanging;

the left disc is reverse, the outer surface of the left disc is defined by the position where the center of one side of the right disc extends to the edge of the inner side flanging, the inner surface of the left disc is defined by the position where the left disc is connected with the waist part and extends to the edge of the inner side flanging, and the outer surface of the left disc is coated with a flow resistance film.

According to some embodiments of the invention, the left side dish the right side dish the waist is for weaving the mesh tubular structure that forms through weaving the silk.

According to some embodiments of the utility model, the near-end center department of right side dish is provided with central round hole, be provided with connection structure on the central round hole and be used for being connected with conveying system.

According to some embodiments of the invention, the edge position of the left disc is inclined towards the waist position forming a conical structure.

According to the utility model discloses a some embodiments, connection structure is including round platform head steel bushing and round platform head connecting piece, be provided with round platform head on the round platform head connecting piece, open at the border of round platform head has the depressed groove.

According to some embodiments of the utility model, connection structure is including round platform head steel bushing and round platform head connecting piece, be provided with round platform head on the round platform head connecting piece, it has interior screw thread to open on the round platform head connecting piece.

According to some embodiments of the present invention, the central circular hole is formed by the coil traction of the circle the closing-up of the right disc.

According to some embodiments of the invention, the waist is formed by heat treatment after pressing the mesh tubular structure by a mold.

According to some embodiments of the invention, the braided wire is a nickel titanium wire.

According to some embodiments of the present invention, the current blocking film is any one of a polyester film, a polytetrafluoroethylene film, and a polyethylene film, or a composite film of the polyester film, the polytetrafluoroethylene film, and the polyethylene film.

The utility model has the advantages that: through the left disc of the coating of the current-resisting film, endothelium can be adhered to and climb on the outer surface of the left disc more easily, endothelialization time of the plugging device is shortened, direct contact between metal wires of the left disc and blood is avoided, release of metal ions can be effectively slowed down, the current-resisting film can be reduced in abrasion of the current-resisting film when the current-resisting film is in a conveying state in cooperation with arc bending edges and inner side flanging, and integrity of the current-resisting film is protected.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of the present invention (embodiment 1);

FIG. 2 is a schematic view of the tubular structure of the grid of the present invention;

FIG. 3 is a schematic view of the tubular structure of the grid with a central circular hole of the present invention;

fig. 4 is an installation diagram of the connection structure in the present invention (embodiment 1);

FIG. 5 is a schematic view showing the operation of the present invention (example 1) in a conveying state;

fig. 6 is a schematic view of the release state of the present invention (embodiment 1);

FIG. 7 is a schematic structural view of another embodiment (embodiment 2) of the present invention;

fig. 8 is a schematic view showing the installation of a connection structure according to another embodiment (embodiment 2) of the present invention;

FIG. 9 is a schematic view showing the operation in the conveying state of the present invention (embodiment 2);

fig. 10 is an operation diagram in the release state of the present invention (embodiment 2).

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. In the following description, certain specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively describe the nature of their work to others skilled in the art using the description and illustrations herein.

Referring to fig. 1, the wrapping type occluder comprises a left disc 100 and a right disc 200, wherein a waist part 300 is arranged between the left disc 100 and the right disc 200. The left tray 100 and the right tray 200 are generally flat trays, and the specific shape of the trays can be adjusted according to the actual situation. And the waist 300 connects the left disc 100 and the right disc 200 into an occluder with certain elasticity. Specifically, when the plugging device is implanted, referring to fig. 5, a sheath tube is firstly extended into a diseased region, then the plugging device is connected with a conveying system of the plugging device, the plugging device is in a conveying state and is pushed to the diseased region from the inside of the sheath tube through the conveying system, and finally, referring to fig. 6, the plugging device is in a releasing state and is plugged.

Referring to fig. 1, the edge of the left disc 100 is bent toward the waist 300 to form an arc-shaped bent edge 110 and an inner side turned edge 120. For example, referring to fig. 1, the edge of the left tray 100 is bent to form a structure with a cross section similar to a J shape, and an arc-shaped bent edge 110 and an inner side flange 120 are formed.

The outer surface 130 of the left disc is defined as the position where the left disc 100 extends to the inner flange edge from the center of one side of the right disc 200, the inner surface of the left disc is defined as the position where the left disc 100 and the waist 300 are connected and extend to the inner flange edge, and the outer surface 130 of the left disc is coated with the flow-blocking film 400. Referring to fig. 6, the outer surface 130 of the left disc is completely coated with the flow blocking film 400, so that endothelium is more easily adhered to and covers the outer surface 130 of the left disc, and endothelialization time of the occluder can be greatly shortened. And the current-blocking film 400 only covers the outer surface 130 of the left disc, referring to fig. 5, when in a conveying state, the direct contact between the metal wires of the left disc 100 and blood can be avoided, and the release of metal ions can be effectively slowed down. And the flow-resisting membrane 400 of the occluder is guaranteed not to be damaged in the conveying process in the conveying catheter 40, so that the integrity of the flow-resisting membrane 400 can be effectively protected.

Referring to fig. 2, the left disc 100, the right disc 200, and the waist 300 are mesh tubular structures 500 woven by weaving yarns. The lattice tubular structure 500 has a lattice 510 distributed thereon. Specifically, the mesh tubular structure 500 with one end closed up can be pressed by a mold with a specific shape and then heat-treated to form, wherein the waist portion 300 is formed by heat-treatment after the mesh tubular structure 500 is pressed by the mold.

The braided wire is a nickel-titanium wire. The flow barrier film 400 is any one of a polyester film, a polytetrafluoroethylene film, and a polyethylene film, or a composite film of a polyester film, a polytetrafluoroethylene film, and a polyethylene film.

Referring to fig. 3 and 4, a central circular hole 600 is formed in the center of the proximal end of the right disc 200, and a connecting structure 700 is disposed on the central circular hole 600 for connecting with a delivery system, so as to facilitate implantation of the occluding body. The central circular hole 600 is formed by pulling the closing-in of the right disc 200 by a circle of coils 610, so that the position of the central circular hole 600 is firmer.

As an embodiment of the connection structure 700, the connection structure 700 includes a circular truncated cone head steel sleeve 710 and a circular truncated cone head connector 720, that is, the circular truncated cone head steel sleeve 710 and the circular truncated cone head connector 720 are detachable structures, and a compression connection manner between the circular truncated cone head steel sleeve 710 and the circular truncated cone head connector 720 may be a threaded connection or a welded connection. The circular truncated cone head connecting piece 720 is provided with a circular truncated cone head 721, and the edge of the circular truncated cone head 721 is provided with a concave groove 722. The circular truncated cone head 721 mounted on the circular truncated cone head connector 720 protrudes outward relative to the block body, and the concave groove 722 facilitates clamping the connecting structure 700 with a clamping tool of a conveying system.

As another embodiment of the connection structure 700, the connection structure 700 includes a round frustum head steel sleeve 710 and a round frustum head connector 720, a round frustum head 721 is disposed on the round frustum head connector 720, an internal thread 723 is disposed on the round frustum head connector 720, and the internal thread 723 is convenient for being in threaded connection with a conveying system.

Referring to fig. 7, as another embodiment, the edge position of the left disc 100 is inclined towards the waist 300 to form a tapered structure, which is beneficial to the closer attachment of the left disc 100 to the heart septal tissue during the attachment of the occlusion, and effectively improves the occlusion effect.

Here, taking the patent foramen ovale occluder as an example, in embodiment 1, referring to fig. 1, the edge position of the left disc 100 in the occluder is inclined towards the waist 300 position to form a tapered structure, referring to fig. 4, the frustum head connector 720 is a steel column-shaped component, the frustum head connector 720 is inserted into the central circular hole 600 from the proximal end side of the right disc 200 of the occluder, and then a frustum head steel sleeve 710 with a through hole is inserted into the central circular hole 600 from the distal end side of the right disc 200 of the occluder, as shown in the arrow direction in fig. 4, the frustum head connector 720 and the frustum head steel sleeve 710 are connected in a compression manner, the compression connection manner can be a screw thread screwing connection or a welding connection, and a connection manner combining the screw thread screwing and welding, and the through hole of the frustum head steel sleeve 710 is matched with the outer diameter of the frustum. The right disc 200 having the coupling structure 700 can be manufactured.

As shown in fig. 5, the concave groove 722 of the clip connecting structure 700 of the conveying forceps 30 can load the occluder into the conveying conduit 40, and the occluder loaded into the conveying conduit 40 is in a conveying state, at this time, the outer surface 130 of the left disc in a natural state is converted into a conveying state, the left disc 100 is folded, and at the same time, the flow-blocking film 400 is also converted so as to be included in the middle of the folded left disc 100 in the conveying state, only the arc-shaped bent edge 110 and the inner turned edge 120 are in more contact with the conveying conduit 40 outside, so that the flow-blocking film 400 of the occluder is ensured not to be damaged in the conveying process in the conveying conduit 40, and the integrity of the flow-blocking film 400 can be effectively protected.

After the heart septal defect position is reached, referring to fig. 6, the left disc 100 and the right disc 200 of the occluder 10 can be respectively released at two sides of the heart septal through the delivery catheter 40 and the delivery forceps 30, the waist 300 is positioned in the defect position, the disc surface of the right disc 200 is smoothly connected with the connecting structure 700, no bulge is formed on the disc surface, and endothelial cells can easily adhere to and cover the disc surface of the right disc 200; the outer surface 130 of the left disc is completely coated by the flow blocking film 400, so that endothelium is more easily adhered to and covers the outer surface 130 of the left disc, the endothelialization time of the occluder can be greatly shortened, the flow blocking film 400 prevents the metal wires of the left disc 100 from being in direct contact with blood, and the release of metal ions can be effectively slowed down. Also taking the patent foramen ovale occluder as an example, in example 2, referring to fig. 7, the edge position of the left disc 100 of the occluder is inclined towards the waist 300 position to form a conical structure, and the edge position of the conical structure is a round blunt structure 400. The right disc 200 of the occluder is made of a mesh tubular structure 500 woven by more than one nickel-titanium wire, the mesh tubular structure 500 comprises meshes 510, as shown in fig. 2, one end of the mesh tubular structure 500 is connected with the meshes 510 at the end part in series by one nickel-titanium wire to form a three-turn coil 610, and the mesh tubular structure 500 with one end closed can be obtained by tightening and closing the mesh tubular structure into a central circular hole 600, as shown in fig. 3. The mesh tubular structure 500 with one end closed up is pressed by a special shaped die and is shaped by heat treatment, the shape and the size of the waist 300 can be customized and shaped by the die according to the actual size of the heart septal defect,

referring to fig. 8 and 9, the conveying steel cable 50 is connected by the threads of the internal threads 723 on the connecting structure 700 of the right disc 200, as shown in fig. 9, the occluder can be loaded into the conveying conduit 40, after reaching the heart septal defect position, the left disc 100 and the right disc 200 of the occluder can be respectively released at the two sides of the heart septal by the conveying conduit 40 and the conveying steel cable 50, the lumbar disc 23 is located in the defect position, as shown in fig. 10, after release, the occluder 20 is in a natural state, the disc surface of the right disc 200 is smoothly connected with the connecting structure 700, no bulge is formed on the disc surface, and endothelial cells can easily adhere to and cover the disc surface of the right disc 200; the conical design of the left disc 100 can be more closely attached to the heart septal tissue, better playing a role in plugging; in addition, the outer surface 130 of the left disc is completely coated by the flow blocking film 400, so that endothelium is more easily adhered to and covers the outer surface 130 of the left disc, the endothelialization time of the occluder can be greatly shortened, the flow blocking film 400 prevents the metal wires of the left disc 100 from being in direct contact with blood, and the release of metal ions can be effectively slowed down.

According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. Cladding type plugging device, including left side dish (100), right side dish (200), left side dish (100) with be provided with waist (300), its characterized in that between right side dish (200):

the edge position of the left disc (100) is bent towards the waist (300) to form an arc-shaped bent edge (110) and an inner side flanging (120);

the left disc (100) is opposite to the position where the center of one side of the right disc (200) extends to the inner side flanging edge to define as the outer surface (130) of the left disc, the joint of the left disc (100) and the waist part (300) extends to the inner side flanging edge to define as the inner surface of the left disc, and the outer surface (130) of the left disc is coated with a flow resistance film (400).

2. The coated occluder of claim 1, wherein: the left disc (100), the right disc (200) and the waist part (300) are of a mesh tubular structure (500) formed by weaving braided wires.

3. The coated occluder of claim 1, wherein: the center of the near end of the right disc (200) is provided with a central round hole (600), and the central round hole (600) is provided with a connecting structure (700) for being connected with a conveying system.

4. The coated occluder of claim 1, wherein: the edge position of the left disc (100) is inclined towards the waist part (300) position to form a conical structure.

5. The coated occluder of claim 3, wherein: the connecting structure (700) comprises a circular truncated cone head steel sleeve (710) and a circular truncated cone head connecting piece (720), a circular truncated cone head (721) is arranged on the circular truncated cone head connecting piece (720), and a concave groove (722) is formed in the edge of the circular truncated cone head (721).

6. The coated occluder of claim 3, wherein: the connecting structure (700) comprises a circular truncated cone head steel sleeve (710) and a circular truncated cone head connecting piece (720), a circular truncated cone head (721) is arranged on the circular truncated cone head connecting piece (720), and an inner screw thread (723) is arranged on the circular truncated cone head connecting piece (720).

7. The coated occluder of claim 3, wherein: the central circular hole (600) is formed by pulling the closing-in of the right disc (200) by a circle of coils (610).

8. The coated occluder of claim 2, wherein: the waist part (300) is formed by heat treatment after the mesh tubular structure (500) is pressed by a mould.

9. The coated occluder of claim 2, wherein: the braided wire is a nickel-titanium wire.

10. The coated occluder of claim 1, wherein: the flow-resistant film (400) is any one of a polyester film, a polytetrafluoroethylene film and a polyethylene film, or a composite film of the polyester film, the polytetrafluoroethylene film and the polyethylene film.