CN113491595A

CN113491595A - Blood vessel far-end protection device for filtering thrombus

Info

Publication number: CN113491595A
Application number: CN202110756720.0A
Authority: CN
Inventors: 田培华
Original assignee: Nanjing Maichuang Medical Technology Co ltd
Current assignee: Nanjing Maichuang Medical Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-10-12

Abstract

The invention discloses a blood vessel far-end protection device for filtering thrombus, which comprises: the outer tube, the inside of outer tube is provided with the left side of inner tube and is provided with the mount pad, the side of mount pad is provided with telescopic connection between support frame and the mount pad, the outside of support frame is provided with blocks the filter screen and blocks that the filter screen passes through telescopic connection between support frame and the outer tube. According to the invention, the inner tube is arranged in the outer tube, the mounting seat is arranged on the left side of the inner tube, the support frame is arranged on the side surface of the mounting seat, the blocking filter screen is arranged outside the support frame, the blocking filter screen is supported by a plurality of groups of support rods arranged in the support frame and is contracted by the support rods, the blocking filter screen can block thrombus or plaque floating at the upstream during lesion treatment, and allows a small amount of blood to flow, so that the influence of blocking on a body is reduced, and the small amount of blood flow can not form large impact on the thrombus or plaque at the downstream.

Description

Blood vessel far-end protection device for filtering thrombus

Technical Field

The invention relates to the technical field of medical instruments, in particular to a blood vessel far-end protection device for filtering thrombus.

Background

In the process of vascular interventional therapy, thrombus or plaque at a lesion can fall off, and a downstream blood vessel can be embolized under the impact of blood flow, so that the far-end blood flow and tissue irrigation are influenced. The medical near end and the medical far end are based on the human body trunk, the near end is the end near the trunk, and the opposite end far from the trunk is the far end. At present, most of blood vessel protection devices adopt an umbrella-shaped filter to be placed at the far end of a lesion for collecting thrombus or plaque falling off from the lesion and preventing far-end embolism. Such filters must first traverse the lesion to reach the distal end when used, and are affected by the diameter of the filter itself, which can also cause thrombus or plaque to fall off when traversing the lesion, resulting in distal vessel embolization. At the same time, if the dislodged thrombus or plaque is more than the maximum filter loading, the filter recovery at the end of treatment will experience thrombus or plaque extravasation, resulting in distal vessel embolization.

When the existing distal end protection instrument is used for system recovery, the wide mouth cannot be narrowed, or the narrowing process is difficult. In addition, most of the existing distal end protectors are self-expanding structures, the shapes of the distal end protectors can be fixed only by extruding the distal end protectors with the blood vessel walls, and the sizes of opening and closing angles cannot be adjusted according to different blood vessel diameters. Therefore, a new technical solution needs to be provided.

Disclosure of Invention

The invention aims to provide a blood vessel distal end protection device for filtering thrombus, which solves the problems that the wide mouth can not be narrowed or the narrowing process is difficult when the conventional distal end protection device is recycled. In addition, most of the existing distal end protectors are self-expanding structures, the shapes of the distal end protectors can be fixed only by extruding the distal end protectors with the blood vessel walls, and the sizes of opening and closing angles cannot be adjusted according to different blood vessel diameters.

In order to achieve the purpose, the invention provides the following technical scheme: a distal vascular protection device for thrombus filtration, comprising: the outer tube, the inside of outer tube is provided with the left side of inner tube and is provided with the mount pad, the side of mount pad is provided with telescopic connection between support frame and the mount pad, the outside of support frame is provided with blocks the filter screen and blocks that the filter screen passes through telescopic connection between support frame and the outer tube, the left side of blocking the filter screen is provided with the little structure setting in big both ends in the middle of telescopic bracket and telescopic bracket are, telescopic bracket is made for spiral elastic material and the same and with the pipe wall between when the outer tube is inside each other contact, telescopic bracket's both ends all are conical structure setting and the right-hand member extends to inside the separation filter screen.

As a preferred embodiment of the present invention, the supporting frame is composed of a plurality of groups of supporting rods, the plurality of groups of supporting rods are distributed at equal intervals, and the blocking screen forms an umbrella-shaped blocking surface through the supporting rods.

As a preferred embodiment of the invention, the surface of the inner tube is provided with a plurality of groups of marking lines which are distributed at equal intervals.

In a preferred embodiment of the present invention, a ball head is disposed at the right end of the inner tube, a plunger is disposed on a side surface of the ball head, the plunger and the outer tube are engaged with each other, and a plurality of sets of vent holes are disposed in the ball head and communicated with the inner tube.

In a preferred embodiment of the present invention, the blocking screen surface is provided with a plurality of groups of openings therein, and the openings are disposed on the surface of the blocking screen between the groups of supporting frames.

In a preferred embodiment of the present invention, the meshes of the blocking screen are arranged in a hexagonal structure, and the meshes on the surface of the blocking screen are distributed in a fish scale shape.

In a preferred embodiment of the present invention, the blocking screen is a spindle-shaped screen with a hollow surface, which is formed by laser engraving or weaving a memory alloy.

In a preferred embodiment of the present invention, the mesh surface material of the blocking screen comprises one or more of nickel titanium wires, PTFE wires and PEEK wires; the mesh size of the blocking filter screen is less than or equal to 0.3mm²。

Compared with the prior art, the invention has the following beneficial effects:

the invention is provided with an inner tube in the outer tube, a mounting seat is arranged at the left side of the inner tube, a support frame is arranged at the side of the mounting seat, a separation filter screen is arranged at the outer part of the support frame, the separation filter screen is supported by a plurality of groups of support rods arranged in the support frame and is contracted by the support rods, the separation filter screen can intercept thrombus or plaque floating at the upstream during lesion treatment and allow a small amount of blood to flow so as to reduce the influence on the body, the small amount of blood flow can not form large impact on the downstream thrombus or plaque, a telescopic bracket is arranged at the side of the separation filter screen, the two ends of the telescopic bracket are small and the middle is large, when the telescopic bracket is arranged in the outer tube, the outer ring structure of the telescopic bracket is mutually attached to the outer tube, when the telescopic bracket extends out of the outer tube, the telescopic bracket is re-rounded due to the reduction effect of memory alloy, and a structure with the large middle and two small ends is formed, this kind of structure is convenient to walk at vascular inside, and can collect the thrombus, the blood clot of interception at the rotation in-process, and convenient to use separates the filter screen and is located vascular center department all the time when passing through telescopic bracket, reduces the damage of therapeutic equipment to blood vessel.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a blocking screen according to the present invention;

fig. 3 is a schematic view of the mesh structure of the screen of the present invention.

In the figure, 1, an outer tube; 2. an inner tube; 3. marking a line; 4. a ball head; 5. a plunger; 6. a vent hole; 7. a mounting seat; 8. blocking the filter screen; 9. a telescopic bracket; 10. opening a hole; 11. a support frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a distal vascular protection device for thrombus filtration, comprising: the pipe comprises an outer pipe 1, an inner pipe 2 is arranged in the outer pipe 1, a mounting seat 7 is arranged on the left side of the inner pipe 2, a support frame 11 is arranged on the side surface of the mounting seat 7, the support frame 11 is in telescopic connection with the mounting seat 7, a blocking filter screen 8 is arranged outside the support frame 11, the blocking filter screen 8 is in telescopic connection with the outer pipe 1 through the support frame 11, a telescopic support 9 is arranged on the left side of the blocking filter screen 8, the telescopic support 9 is in a structure with a large middle and small ends, the telescopic support 9 is made of spiral elastic materials and is identical when being arranged in the outer pipe 1 and is in contact with the pipe wall, the two ends of the telescopic support 9 are in a conical structure, the right end of the telescopic support extends into the blocking filter screen, the inner pipe 2 is arranged in the outer pipe 1, the mounting seat 7 is arranged on the left side surface of the inner pipe 2, the supporting frame 11 is arranged on the side surface of the mounting seat 7, and the blocking filter screen is arranged outside the support frame 11, the separation filter screen is supported by a plurality of groups of support rods arranged in the support frame 11 and is contracted by the support rods, the separation filter screen can intercept thrombus or plaque floating at the upstream during lesion treatment and allows a small amount of blood to flow so as to reduce the influence of the blockage on the body, the small amount of blood flow can not form large impact on the downstream thrombus or plaque, the side surface of the separation filter screen is provided with the telescopic support 9, the two ends of the telescopic support 9 are small and the middle of the telescopic support 9 is large, when the telescopic support 9 is arranged in the outer tube 1, the outer ring structure of the telescopic support 9 is mutually attached to the outer tube 1, when the telescopic support 9 extends out of the outer tube 1, the telescopic support 9 is rounded due to the reduction effect of the memory alloy so as to form a structure with the middle large and the two small ends, the structure is convenient to pass through the inside of a blood vessel, and can collect the intercepted thrombus and blood clots during the rotation process, and is convenient to use, when the telescopic support 9 is passed through, the blocking filter screen is always positioned in the center of the blood vessel, so that the damage of the therapeutic apparatus to the blood vessel is reduced.

Further improved, as shown in fig. 2: support frame 11 comprises a plurality of groups bracing piece and equidistant distribution between a plurality of groups bracing piece, the separation filter screen forms umbelliform through the bracing piece and hinders the section, and equidistant distribution makes support frame 11 atress more even between a plurality of groups bracing piece, and umbelliform blocks the face simultaneously and blocks effectually.

Further improved, as shown in fig. 1: the surface of inner tube 2 is provided with a plurality of groups of marking line 3 and equidistant distribution between the marking line 3, and the setting up of marking line 3 can audio-visually know inner tube 2 and stretch into length.

Further improved, as shown in fig. 1: the right-hand member of inner tube 2 is provided with bulb 4 and the side of bulb 4 is provided with plunger 5, mutual gomphosis between plunger 5 and the outer tube 1, be provided with between a plurality of groups of air vent 6 and the inner tube 2 and be linked together, the setting of bulb 4 can avoid inner tube 2 to stretch into the overlength, conveniently is connected with external device simultaneously.

Further improved, as shown in fig. 2: the inside of blocking the wire side is provided with a plurality of groups of trompils 10 and trompil 10 sets up the surface of blocking filter screen 8 between a plurality of groups of support frames 11, and trompil 10 can supply therapeutic instrument such as thrombectomy catheter to pass through to use therapeutic instrument treatment distal end pathological change department blood vessel, the thrombectomy catheter that will intercept through trompil 10 is clear away to the external after absorbing to the plaque.

In a further improvement, as shown in fig. 3: the mesh that blocks filter screen 8 is the hexagon structure setting, the surface mesh that blocks filter screen 8 is the ichthyoid and distributes, and the surface mesh that blocks filter screen 8 is the ichthyoid and distributes, makes it remove more smoothly in the blood vessel, reduces the damage to the blood vessel simultaneously.

Further improved, as shown in fig. 1: the mesh surface material of the blocking filter screen 8 comprises one or more of nickel titanium wires, PTFE wires and PEEK wires; the mesh size of the blocking filter screen 8 is less than or equal to 0.3mm²。

The invention is provided with an inner tube 2 in an outer tube 1, a mounting seat 7 is arranged at the left side of the inner tube 2, a support frame 11 is arranged at the side surface of the mounting seat 7, a separation filter screen is arranged at the outer part of the support frame 11, the separation filter screen is supported by a plurality of groups of support rods arranged in the support frame 11 and is contracted by the support rods, the separation filter screen can intercept thrombus or plaque floating at the upstream in the pathological change treatment and allows a small amount of blood to flow so as to reduce the influence on the body, the small amount of blood flow can not form large impact on the downstream thrombus or plaque, a telescopic bracket 9 is arranged at the side surface of the separation filter screen, the two ends of the telescopic bracket 9 are small and the middle is large, when the telescopic bracket 9 is arranged in the outer tube 1, the outer ring structure of the telescopic bracket 9 is mutually jointed with the outer tube 1, when the telescopic bracket 9 extends out of the outer tube 1, the telescopic bracket 9 is made to be round due to the reduction effect of memory alloy, the structure that big both ends are little in the middle of forming, this kind of structure is convenient to walk in intravascular portion, and can collect the thrombus, the blood clot of interception at the rotation in-process, and convenient to use, separation filter screen are located vascular center department all the time when through telescopic bracket 9, reduce the damage of therapeutic equipment to blood vessel.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A distal vascular protection device for thrombus filtration, comprising: the method comprises the following steps: outer tube (1), the inside of outer tube (1) is provided with inner tube (2) and the left side of inner tube (2) is provided with mount pad (7), the side of mount pad (7) is provided with telescopic connection between support frame (11) and mount pad (7), the outside of support frame (11) is provided with blocks filter screen (8) and pass through telescopic connection between support frame (11) and outer tube (1), the left side of blocking filter screen (8) is provided with telescopic bracket (9) and is the little structure setting in middle big both ends, telescopic bracket (9) make for spiral elastic material and between outer tube (1) when inside same and with the pipe wall between the mutual contact, the both ends of telescopic bracket (9) all are conical structure setting and the right-hand member extends to the separation filter screen inside.

2. A distal vascular protection device for thrombus filtration according to claim 1, wherein: support frame (11) comprise a plurality of groups bracing piece and equidistant distribution between a plurality of groups bracing piece, the separation filter screen forms umbelliform through the bracing piece and hinders the section.

3. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the surface of the inner pipe (2) is provided with a plurality of groups of marking lines (3), and the marking lines (3) are distributed at equal intervals.

4. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the ball head (4) is arranged at the right end of the inner pipe (2), the plunger (5) is arranged on the side face of the ball head (4), the plunger (5) and the outer pipe (1) are mutually embedded, and a plurality of groups of vent holes (6) are arranged in the ball head (4) and communicated with the inner pipe (2).

5. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the inside of blocking the wire side is provided with a plurality of groups of openings (10) and the openings (10) are arranged on the surface of the blocking filter screen (8) among a plurality of groups of support frames (11).

6. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the net holes of the blocking filter screens (8) are arranged in a hexagonal structure, and the net holes in the surfaces of the blocking filter screens (8) are distributed in a fish scale shape.

7. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the blocking filter screen (8) is a spindle-shaped filter screen with a hollow surface and formed by laser engraving or weaving of memory alloy.

8. A distal vascular protection device for thrombus filtration according to claim 1, wherein: the mesh surface material of the blocking filter screen (8) comprises one or more of nickel titanium wires, PTFE wires and PEEK wires; the mesh size of the blocking filter screen (8) is less than or equal to 0.3mm²。