CN217390962U

CN217390962U - Filter plug device

Info

Publication number: CN217390962U
Application number: CN202220376590.8U
Authority: CN
Inventors: 张福先; 王昊飞; 王海军; 林龑
Original assignee: Baiwei Wuhan Medical Technology Co ltd
Current assignee: Baiwei Wuhan Medical Technology Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-09-09
Anticipated expiration: 2032-02-23

Abstract

The embodiment of the disclosure discloses a filter plug device, which comprises a filter body, wherein the filter plug body comprises a collecting part, a supporting part and a filtering part, the collecting part and the filtering part are oppositely arranged, the supporting part is positioned between the collecting part and the filtering part, the supporting part comprises a plurality of beams, the beams are arranged at intervals along the circumferential direction of the filter body, one end of each beam is connected with the collecting part, and the other end of each beam is connected with the filtering part; the binding structure comprises at least one binding end, the binding end is fixedly connected with the end part of the supporting part and/or the filtering part, and the binding end is of a columnar structure; wherein the converging end is a degradable material and the end of the filter body is configured to radially expand upon degradation of the converging end.

Description

Filter plug device

Technical Field

The disclosure relates to the technical field of medical equipment, in particular to a thrombus filtering device.

Background

Embolectomy device placement is one of the main approaches to endoluminal treatment.

The thrombus filter insertion operation has the characteristics of small wound and lower requirement on the physical condition of a patient compared with the traditional surgical operation, and in recent years, with the development of medical materials and imaging technology, the intracavity treatment has been widely applied to the treatment of peripheral arterial vascular embolic diseases.

At present, after the thrombus is collected by the thrombus filter device, the thrombus filter device needs to be taken out, and secondary trauma needs to be caused to the blood vessel in the process of taking out the thrombus filter device.

Disclosure of Invention

An object of the present disclosure is to provide a new technical solution of a filter plug device.

In one embodiment of the present disclosure, a filter plug device is provided, comprising

The filter plug comprises a filter body, wherein the filter plug body comprises a collecting part, a supporting part and a filtering part, the collecting part and the filtering part are oppositely arranged, the supporting part is positioned between the collecting part and the filtering part, the supporting part comprises a plurality of beams, the beams are arranged at intervals along the circumferential direction of the filter body, one end of each beam is connected with the collecting part, and the other end of each beam is connected with the filtering part; and

the binding structure comprises at least one binding end, the binding end is fixedly connected with the end part of the supporting part and/or the filtering part, and the binding end is of a columnar structure; wherein the content of the first and second substances,

the converging end is a degradable material, and the end of the filter body is configured to radially expand upon degradation of the converging end.

Optionally, a connection part is arranged at an end of the converging end, which is away from the filter body, and a magnetic element is arranged on the connection part.

Optionally, the connecting part is of a concave structure, a thread is arranged on the inner wall of the concave structure, and the magnetic element is located at the bottom end of the concave structure; or

The connecting part is of an annular structure, and the magnetic element is located on the inner wall of the annular structure.

Optionally, a barb structure is provided on the beam, a portion of the beam being contactable with an inner surface of the side wall of the blood vessel in an expanded state of the embolus filtering device, the barb structure being configured to pierce the side wall of the blood vessel.

Optionally, on the roof beam with the corresponding position of barb structure is provided with the pit, the pit with barb structure phase-match strain the bolt body under the state of shrink, barb structure is held in the pit.

Optionally, in the expanded state of the filter body, the collecting portion and the filter portion each have a mesh, and the mesh size of the collecting portion is larger than the mesh size of the filter portion.

Optionally, the meshes of the collecting part and the filtering part are arranged in parallel along the circumferential direction, and the number of the meshes of the collecting part is smaller than that of the meshes of the filtering part.

Optionally, the filter portion includes a first rib extending from one end of the beam, the collecting portion includes a third rib extending from the other end of the beam, and end portions of the first rib and the third rib are in a chamfered structure;

the end part of the first rib and/or the end part of the third rib is fixedly connected with the binding end.

Optionally, the filter portion includes a plurality of first ribs that extend from one end of the beam, the collecting portion includes at least one third rib that extends from the other end of the beam, a second rib extends from a position of connection of two adjacent first ribs, a fourth rib extends from a position of connection of two adjacent third ribs, and the bundling end is fixedly connected with an end of the second rib and/or fixedly connected with an end of the fourth rib.

Optionally, a ratio of the length of the second bead to the length of the first bead is less than or equal to 1: 2; a ratio of a length of the fourth bead to a length of the third bead is greater than or equal to 1: 2.

through being provided with degradable structure of restrainting, the both ends of filtering the body can open along the radial of blood vessel after the structure degradation is restrainted to the structure of restrainting to contact with the blood vessel inner wall, in order to form the support to the blood vessel. Thus, after the filter plug device filters the plug, the filter plug device does not need to be taken out.

Other features of the present description and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the specification.

FIG. 1 is a schematic structural diagram of a thrombectomy device according to an embodiment of the present disclosure;

FIG. 2 is a second schematic structural diagram of a thrombus removal device in an embodiment of the present disclosure;

fig. 3 is a second schematic structural diagram of a bolt removing device in the embodiment of the disclosure.

Description of reference numerals:

10. a collecting section; 11. a third rib; 12. a fourth rib; 20. a support portion; 21. a beam; 22. a barb structure; 23. a pit; 24. mesh openings; 30. a filtering part; 31. a first rib; 32. a second rib; 40. the vessel wall; 50. a first convergence end; 51. a connecting member; 60. and a second terminal.

Detailed Description

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.

The features of the terms first and second in the description and in the claims of the present disclosure may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specified.

In the description of the present disclosure, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present disclosure.

In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

According to one embodiment of the present disclosure, a filter plug device is provided. The plug device is capable of transitioning between a collapsed state and an expanded state. For example, the plug device is a memory alloy. When entering the blood vessel, the thrombus filtering device in a contraction state is placed in the catheter, and one end of the thrombus filtering device is connected with a push rod. When the catheter is at the set position, the thrombus filtering device can expand along the radial direction of the blood vessel and start to collect thrombus in the blood vessel by pushing the push rod to drive the thrombus filtering device to extend out of the catheter.

As shown in fig. 1, the filter plug device comprises a filter body, the filter plug body comprises a collecting part 10, a supporting part 20 and a filtering part 30, the collecting part 10 and the filtering part 30 are arranged oppositely, the supporting part 20 is arranged between the collecting part 10 and the filtering part 30, the supporting part 20 comprises a plurality of beams 21, the plurality of beams 21 are arranged at intervals along the circumferential direction of the filter body, one end of each beam 21 is connected with the collecting part 10, and the other end of each beam 21 is connected with the filtering part 30.

The filter plug device further comprises a binding structure, the binding structure comprises at least one binding end, the binding end is fixedly connected with the end part of the supporting part 20 and/or the filtering part 30, and the binding end is of a columnar structure. The converging end is of a degradable material, and the end of the filter body is configured to radially expand upon degradation of the converging end.

As shown in fig. 1, the support portion 20 is composed of a plurality of beams 21, and the support portion 20 can be expanded in the radial direction to form a support for the inner wall of the blood vessel. The plurality of beams 21 are arranged annularly in the circumferential direction. The plurality of beams 21 may be arranged in a circular ring shape or a square ring shape.

For example, the beam 21 can drive the filter body connected with the beam to expand radially in the expansion process, and the converging structure has a converging effect on one end of the filter body far away from the beam 21. In this way, the filter body in the expanded state has a conical structure.

In one example, the trap portion 10 of the filter body can function as a filter plug in an expanded state of the filter plug device. The collecting part 10 has a net structure.

For example, the collecting part 10 and the filtering part 30 of the filtering body can function as a filter plug. Alternatively, the collection portion 10 of the filter body is in an open state, and the filter portion 30 of the filter body is capable of filtering thrombus. The restriction structure is used for restricting one end of the filter plug body capable of filtering thrombus.

For example, the binding structure includes two binding ends, namely a first binding end 50 and a second binding end 60, the first binding end 50 binds an end of the collecting part 10 away from the supporting part 20, and the second binding end 60 binds an end of the filtering part 30 away from the supporting part 20.

As shown in FIG. 3, the present embodiment provides a plug device that is capable of transitioning from an expanded state to a stent state. The constricting structure may be degradable, such as a magnesium alloy.

In the actual use process, after thrombolysis is carried out on thrombus collected in the filtering body, the converging structure is slowly degraded. After the converging structure is degraded, the end part of the filtering body bound by the converging structure can be radially opened, and the filter plug device is of a drift diameter structure.

In this way, the two ends of the filtering body can be expanded along the radial direction of the blood vessel after the constriction structure is degraded, so as to be in contact with the inner wall of the blood vessel to support the blood vessel. Thus, after the filter plug device filters the plug, the filter plug device does not need to be taken out.

In addition, since the thrombus-forming blood vessel wall 40 is easily deformed after the thrombus is removed, the thrombus device can be supported by the blood vessel at the site by replacing the thrombus filter device with a stent. Avoiding the formation of thrombus again.

In one example, a connection member 51 is provided at an end of the converging end facing away from the filter body, and a magnetic element is provided on the connection member 51.

For example, the connecting member 51 and the binding end are integrally formed, and both the connecting member 51 and the binding end are made of the same material and are degradable.

In actual use, the push rod is connected to the connecting member 51 to push the filter plug device. The magnetic element is arranged on the connecting part 51, so that the connecting strength of the push rod and the connecting part 51 is increased.

Furthermore, a situation in which the push rod is disengaged from the connecting member 51 in the blood vessel is avoided.

In one example, as shown in fig. 2, the coupling member 51 has a ring structure, and the magnetic element is located on an inner wall of the ring structure.

The push rod is in a hook-like configuration corresponding to the loop configuration so that the push rod can be coupled to the coupling member 51 to push the filter plug assembly.

Alternatively, the connecting part 51 has a concave structure, a thread is provided on the inner wall of the concave structure, and the magnetic element is located at the bottom end of the concave structure.

The push rod is connected with the connecting part 51 through threads, and the end part of the push rod can be attracted by the magnetic element. In this way, the strength of the connection between the connection member 51 and the push rod is further increased, and the push rod is further prevented from being detached from the connection member 51 in the blood vessel.

In one example, as shown in fig. 1 and 2, a barb structure 22 is provided on the beam 21, a portion of the beam 21 being contactable with an inner surface of the side wall of the blood vessel in an expanded state of the embolic device, the barb structure 22 being configured to pierce the side wall of the blood vessel.

Through such a mode, filter the body and can be fixed in the position of settlement, avoid filtering the self-movement of body in the blood vessel.

In one example, as shown in fig. 1 and 2, a recess 23 is provided on the beam 21 at a position corresponding to the barb structure 22, the recess 23 is matched with the barb structure 22, and the barb structure 22 is accommodated in the recess 23 when the filter plug body is in a contracted state.

For example, in the process of forming the barb, the shape of the barb structure is cut on the surface of the beam 21, and the cut portion penetrates through the height direction of the beam 21 to form the barb structure 22 having one end connected to the beam 21, and the edge of the barb structure 22 away from the end connected to the beam 21 forms a free end which can be moved relative to the recess 23. During expansion of the filter plug device, the barb structures 22 project from the recesses 23, and in the collapsed state of the filter plug device, the barb structures are located in the recesses.

In this way, the filter bolt device is prevented from contacting the outer wall of the beam 21 in the contracted state, and the barb structure 22 is damaged or the inclination angle between the barb structure 22 and the beam 21 is changed. By embedding the barb structures 22 in the recesses 23, an effective protection of the barb structures 22 is provided.

In one example, as shown in fig. 1 and 2, in a state where the filter body is expanded, both the collecting part 10 and the filtering part 30 have meshes 24, and the size of the meshes 24 of the collecting part 10 is larger than that of the meshes 24 of the filtering part 30.

The supporting portion 20 is located between the collecting portion 10 and the filtering portion 30, and during the radial expansion of the supporting portion 20, the collecting portion 10 and the filtering portion 30 are also expanded in the radial direction.

In one embodiment of the present application, the binding structure binds one end of the collecting section 10 and also binds one end of the filtering section 30. Thus, the collecting part 10 and the filtering part 30 are both tapered.

The collecting part 10 and the filtering part 30 are formed in a net structure. The collecting part 10 can filter the thrombus formation having a large volume, and the thrombus formation having a small volume is secondarily filtered by the filtering part 30 through the supporting part 20 and the filtering part 30.

In this way, the efficiency of the filter plug can be increased.

In one example, as shown in fig. 1 and 2, the collecting part 10 and the meshes 24 of the filtering part 30 are arranged side by side in the circumferential direction, and the number of the meshes 24 of the collecting part 10 is smaller than that of the meshes 24 of the filtering part 30.

By reducing the density of the meshes 24 of the collecting section 10, there is a difference in density between the collecting section 10 and the meshes 24 of the filtering section 30, so that thrombi of different sizes can be collected.

In one example, as shown in fig. 1-3, the filter portion 30 includes a first rib 31 extending from one end of the beam 21, the collecting portion 10 includes a third rib 11 extending from the other end of the beam 21, and the first rib 31 and the third rib 11 have a chamfered end.

For example, the end of the first rib 31 is fixedly connected with the constricted end. Optionally, the end of the third rib 11 is fixedly connected with the constricted end. Alternatively, the distal end of the first rib 31 and the end of the third rib 11 are both fixedly connected to the constricted end.

In this way, the collecting part 10 and the filtering part 30 are formed in a net structure.

Optionally, the filtering portion 30 includes a plurality of first ribs 31 extending from one end of the beam 21, the collecting portion 10 includes at least one third rib 11 extending from the other end of the beam 21, a second rib 32 extending from a position where two adjacent first ribs 31 are connected, a fourth rib 12 extending from a position where two adjacent third ribs 11 are connected, and a bundling end is fixedly connected to an end of the second rib 32 and/or an end of the fourth rib 12.

As shown in fig. 3, a third rib 11 extends from the end of the beam 21 close to the collecting part 10, and two first ribs 31 extend from the end of the beam 21 close to the filtering part 30.

In this way, the size of the meshes 24 of the collecting part 10 can be made larger than that of the meshes 24 of the filtering part 30.

Optionally, the number of the third ribs 11 extending from the end of the beam 21 near the collecting part 10 is 2 or 3, etc. The number of the first ribs 31 extending from the end of the beam 21 near the filter portion 30 is 4 or 5.

Here, the number of the first ribs 31 extending from one end of each beam 21 and the number of the third ribs 11 extending from the other end of each beam 21 are not specifically limited, and those skilled in the art can set the number according to the size and density of the mesh holes 24.

In this way, the number of ribs can be increased, and the density of the mesh 24 can be changed by adjusting the number of ribs.

In one example, the ratio of the length of the second ribs 32 to the length of the first ribs 31 is less than or equal to 1: 2; the ratio of the length of the fourth bead 12 to the length of the third bead 11 is greater than or equal to 1: 2.

in this ratio range, the size of the mesh 24 is more convenient for the filter plug part to form a net structure in the radial direction of the blood vessel, and the effect of the filter plug can be further increased.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A thrombus filter device, comprising:

2. A filter plug arrangement according to claim 1, wherein the end of the converging end facing away from the filter body is provided with a coupling member on which a magnetic element is provided.

3. The filter plug device according to claim 2, wherein the connecting part is a concave structure, threads are arranged on the inner wall of the concave structure, and the magnetic element is positioned at the bottom end of the concave structure; or

4. The embolic filtering device of claim 1, wherein a barb structure is provided on the beam, a portion of the beam being contactable with an inner surface of the side wall of the blood vessel in the expanded state of the embolic filtering device, the barb structure being configured to pierce the side wall of the blood vessel.

5. The filter plug device according to claim 4, wherein a concave pit is provided on the beam corresponding to the barb structure, the concave pit matches with the barb structure, and the barb structure is accommodated in the concave pit when the filter plug body is in a contracted state.

6. A filter plug arrangement according to claim 1, wherein in the expanded state of the filter body both the collecting portion and the filter portion have a mesh, the mesh size of the collecting portion being larger than the mesh size of the filter portion.

7. A filter plug arrangement according to claim 5, wherein the meshes of the collecting section and the filter section are circumferentially juxtaposed, the number of meshes of the collecting section being smaller than the number of meshes of the filter section.

8. The filter plug device according to claim 1, wherein the filter portion comprises a first rib extending from one end of the beam, the collecting portion comprises a third rib extending from the other end of the beam, and ends of the first rib and the third rib are in a chamfer structure;

9. A filter plug device according to claim 1, wherein the filter portion includes a plurality of first ribs extending from one end of the beam, the collection portion includes at least one third rib extending from the other end of the beam, a second rib extends from a position where two adjacent first ribs are connected, a fourth rib extends from a position where two adjacent third ribs are connected, and the constricted end is fixedly connected to an end of the second rib and/or an end of the fourth rib.

10. A filter plug arrangement according to claim 9, wherein the ratio of the length of the second ribs to the length of the first ribs is less than or equal to 1: 2; a ratio of a length of the fourth rib to a length of the third rib is greater than or equal to 1: 2.