CN111973325B

CN111973325B - Intracranial arterial plaque recycling and cutting stent

Info

Publication number: CN111973325B
Application number: CN202010814404.XA
Authority: CN
Inventors: 邓一鸣; 缪中荣; 高峰; 陈端端
Original assignee: Beijing Tiantan Hospital
Current assignee: Beijing Tiantan Hospital
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2023-04-07
Anticipated expiration: 2040-08-13
Also published as: CN111973325A

Abstract

The invention discloses an intracranial arterial plaque recovery cutting stent, which relates to the technical field of medical instruments and comprises a stent body, an adjusting pull tube, an adjusting wire drawing, a support drawing component and a plaque cutting component, wherein an adjusting cavity is arranged in the stent body, an installation step is arranged at the front end of the stent body, a driving component is arranged in the adjusting cavity, a connector is arranged at the front end of the adjusting wire drawing, the plaque cutting component comprises a cutting net, a support drawing air bag and two support drawing nets, two ends of the cutting net are respectively and fixedly connected with the adjusting pull tube and a connecting block, the other ends of the two support drawing nets are fixedly connected with the adjusting wire drawing, the support drawing air bag is annular and is arranged in the middle of the adjusting wire drawing, and the support drawing air bag is positioned in the middle of the two support drawing nets. The bracket ensures the radial cutting force of the cutting net on the thrombus plaque, is convenient to control, improves the cleaning effect of the thrombus plaque, and can effectively fix the bracket body by the support assembly, thereby avoiding secondary damage to a patient.

Description

Intracranial arterial plaque recycling and cutting stent

Technical Field

The invention relates to the technical field of medical instruments, in particular to an intracranial arterial plaque recovery cutting stent.

Background

The intracranial arterial plaque recovery cutting stent is common medical equipment for treating intracranial thrombus, and thrombus plates are mainly cut and recovered through an elastic cutting net.

Chinese patent No. CN109350180A discloses a bracket-shaped bolt extractor, which comprises a bracket body; the stent body comprises a distal end structure, a middle structure and a proximal end structure; the distal structure, the middle structure and the proximal structure are sequentially connected together; the distal structure is formed as a first cage comprising a plurality of first cells on a circumferential surface thereof; the distal structure is used for remaining outside the thrombus after passing through the thrombus; the diameter of the distal structure is larger than the diameter of the central structure and the proximal structure. Because the diameter of the far-end structure is larger than that of the near-end structure, the stent-shaped thrombus remover disclosed by the invention can be used for rapidly fixing thrombus without waiting for the fusion of the stent and the thrombus, small thrombus fragments are not easily formed when the thrombus is fixed, and the thrombus can be prevented from escaping when the thrombus is withdrawn.

However, the above patent has the following technical problems in use; first, the above patent uses a wire to pull the distal structure to move during the cutting process to cut the thrombus, and the distal structure recovers the cutting state in the blood vessel through the memory metal to cut the thrombus. 1. The size of the thrombus cutting machine cannot be accurately controlled, so that the thrombus on the side wall of the blood vessel cannot be cut cleanly, 2, the radial cutting force cannot be controlled, and if the thrombus is cut only in the axial direction, the resistance can be increased when the thrombus is large, and even the blood vessel is affected. Second, the above patent divides the stent body into a plurality of structures, a distal structure, a middle structure and a proximal structure, and thus, it is difficult to control them to form different diameters, and it is even impossible to precisely control the sizes of different arteries.

Disclosure of Invention

The invention aims to provide an intracranial arterial plaque recovery cutting stent, and aims to solve the technical problems that the radial cutting force of the intracranial arterial plaque recovery cutting stent cannot be controlled and the cutting effect is poor in the prior art.

The invention provides an intracranial arterial plaque recovery cutting stent which comprises a stent body, an adjusting pull tube, an adjusting pull wire, a support drawing assembly and a plaque cutting assembly, wherein an adjusting cavity is arranged in the stent body, the adjusting pull tube is arranged in the adjusting cavity, the adjusting pull wire is arranged in the adjusting pull tube, the front end of the stent body is provided with an installation step, the support drawing assembly is installed on the installation step, a driving assembly used for controlling the support drawing assembly to work is arranged in the adjusting cavity, the front end of the adjusting pull wire is provided with a connector, the plaque cutting assembly is arranged between the connector and the stent body, the plaque cutting assembly comprises a cutting net, a support drawing air bag and two support drawing nets, two ends of the cutting net are fixedly connected with the adjusting pull tube and the connecting block respectively, one ends of the two support drawing nets are fixedly connected with the middle of the cutting net, the other ends of the two support drawing nets are fixedly connected with the adjusting pull wire, the support drawing air bag is annular and is installed in the middle of the adjusting pull wire, and the support drawing air bag is located in the middle of the two support drawing nets.

Further, prop the subassembly including drawing together and prop ring, a plurality of and draw together vaulting pole and a plurality of and draw together and prop the piece, a plurality of draw together and prop the piece and encircle the front end at the support body, every draw together the lower extreme that props the piece and all be equipped with two one end rather than articulated and the connecting rod that is parallel to each other, every the other end of connecting rod all articulates with the support body, draw together to prop the ring cover and establish the front end at the support body and draw together and prop ring and support body sliding fit, all draw together the one end of vaulting pole all with draw together to prop the ring articulated, all draw together the other end of vaulting pole all with the middle part of the connecting rod that corresponds articulated.

Further, drive assembly includes drive ring, drive wire drawing, a plurality of drive block and a plurality of drive groove, the drive ring sets up in adjusting the intracavity and sliding fit between the two, a plurality of the drive groove all sets up on the support body and all drive grooves all are located the drive ring and draw between the support ring, all the both ends of drive block respectively with the drive ring with draw support ring fixed connection and every drive block all with its corresponding drive groove sliding fit.

Further, the front end and the rear end of each support drawing piece are respectively provided with an arc-shaped part bending towards the axis of the support body.

Further, the front end of each supporting sheet extends forwards until the front end of the bracket body is exceeded.

Further, the cutting net and the two holding nets are made of memory metal materials.

Further, head developing marks are arranged on the cutting nets.

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

firstly, the cutting net is propped up by the holding-up air bag through the holding-up net, as shown in figure 4, the cutting net firstly carries out radial cutting on the thrombus plaque when being propped up. Then, the cutting net is pulled to move towards the stent body through the adjusting pull tube, on one hand, the cutting net performs axial cutting on the plaque to enable the plaque to be separated from the vascular wall, on the other hand, the plaque cutting assembly moves towards the stent body to be recovered, and in the working process, the radial cutting force of the cutting net is ensured to be large enough through the control of the inflating and expanding degree of the stretching air bag. Compared with the prior art, the cutting device has better cutting effect on plaques, firstly performs radial cutting and then performs axial cutting, so that intracranial arterial plaques are cleaned more cleanly, and the condition that sequelae are left due to incomplete treatment is prevented.

Secondly, referring to the attached

drawings

4 and 5, the specific structure of the support-including component provided by the invention is that the support-including ring moves to pull the support-including rod to move, the support-including rod pushes the connecting rod to move, so that the support-including piece moves to support the vascular wall in a supporting manner, a good fixing effect on the stent body can be achieved, the stent body is prevented from moving when the cutting net is driven to move by adjusting the pull tube to cut plaques, and secondary damage to patients is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

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

FIG. 2 is a top view of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of the portion B in FIG. 3

FIG. 5 is a cross-sectional view of the present invention in use;

fig. 6 is an enlarged view at C in fig. 5.

Reference numerals are as follows:

support body 1, adjust trombone slide 2, adjust the wire drawing 3, draw together and prop subassembly 4, draw together and prop ring 41, draw together vaulting pole 42, draw together and prop piece 43, connecting rod 44, plaque cutting subassembly 5, cutting net 51, draw together and prop gasbag 52, draw together and prop net 53, adjust chamber 6, installation step 7, drive assembly 8, drive ring 81, drive wire drawing 82, drive block 83, drive groove 84, leak protection net 9, connector 10, arc portion 11.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, an embodiment of the invention provides an intracranial arterial plaque recovery cutting stent, which includes a stent body 1, an adjusting pull tube 2, an adjusting pull wire 3, a support component 4 and a plaque cutting component 5, wherein an adjusting cavity 6 is arranged in the stent body 1, the adjusting pull tube 2 is arranged in the adjusting cavity 6, the adjusting pull wire 3 is arranged in the adjusting pull tube 2, an installation step 7 is arranged at the front end of the stent body 1, the support component 4 is installed on the installation step 7, a driving component 8 for controlling the support component 4 to work is arranged in the adjusting cavity 6, a connector 10 is arranged at the front end of the adjusting pull wire 3, the plaque cutting component 5 is arranged between the connector 10 and the stent body 1, and the plaque cutting component 5 includes a cutting mesh 51, a support airbag 52 and two support meshes 53; the purpose of arranging the support including net 53 is to avoid that the support including air bag 52 directly supports the cutting net 51, otherwise, the outer wall of the support including air bag 52 is in direct contact with the cutting net 51, which may cause the meshes of the cutting net 51 to be completely blocked, and further, thrombus plaques cannot be radially cut, and only the thrombus plaques are extruded, so that the blood vessels are compressed and damaged, therefore, through the indirect work of the support including net 53, the cutting effect of the cutting net on the thrombus plaques can be ensured, and simultaneously, the radial cutting force of the cutting net is sufficient through the work of the support including air bag 52, two ends of the cutting net 51 are respectively and fixedly connected with the adjusting pull tube 2 and the connecting block, one end of each support including net 53 is fixedly connected with the middle part of the cutting net 51, the other end of each support including net 53 is fixedly connected with the adjusting pull wire 3, the support including air bag 52 is annular and is installed in the middle part of the adjusting pull wire 3, and the support including air bag 52 is located in the middle parts of the two support including nets 53; the specific working modes of the adjusting pull tube 2 and the adjusting pull wire 3 are the prior art, and are not described herein.

The working principle of the invention is as follows: in operation, the plaque cutting assembly 5 is moved out of the stent body 1 and moved to the position of the intracranial arterial plaque by adjusting the operation of the pull tube 2, and then the bracket body 1 is fixed by operating the driving assembly 8 to enable the bracket assembly 4 to bracket. Subsequently, the bracketing air bag 52 is inflated and expanded by adjusting the cooperation of the pull tube 2 and the bracketing air bag 52, the bracketing air bag 52 props up the cutting net 51 through the bracketing net 53, and as shown in fig. 4, the cutting net 51 is propped up and simultaneously the thrombus plaque is cut radially. And then, the cutting net 51 is pulled to move towards the inside of the stent body 1 by adjusting the pull tube 2, the cutting net 51 performs axial cutting on the plaque on one hand to enable the plaque to be separated from the blood vessel wall, and on the other hand, the plaque cutting assembly 5 moves towards the inside of the stent body 1 to be recovered, and in the working process, the radial cutting force of the cutting net 51 is ensured to be large enough by controlling the inflation and swelling degree of the support air bag 52. Compared with the prior art, the cutting device has better cutting effect on plaques, performs radial cutting and then performs axial cutting, so that intracranial arterial plaques are cleaned more cleanly, and sequelae caused by incomplete treatment are prevented.

Specifically, the support drawing component 4 includes a support drawing ring 41, a plurality of support drawing rods 42 and a plurality of support drawing plates 43, the plurality of support drawing plates 43 surround the front end of the support body 1, each lower end of the support drawing plates 43 is provided with two connecting rods 44, one end of each connecting rod 44 is hinged to the corresponding connecting rod 44 and is parallel to the corresponding connecting rod, the other end of each connecting rod 44 is hinged to the support body 1, the support drawing ring 41 is sleeved at the front end of the support body 1 and is in sliding fit with the support drawing ring 41 and the support body 1, one end of each support drawing rod 42 is hinged to the support drawing ring 41, and the other end of each support drawing rod 42 is hinged to the middle of the corresponding connecting rod 44; concrete structure refers to fig. 4 and fig. 5, draws together vaulting pole 42 through drawing together the pulling of the removal of supporting ring 41 and removes, draws together vaulting pole 42 and promotes the connecting rod 44 and remove, and then makes to draw together the piece 43 and remove and draw together the vascular wall and prop, can play good fixed effect to support body 1, avoids leading to support body 1 to remove when removing to cut the plaque through adjusting trombone slide 2 drive cutting net 51, avoids causing secondary damage to the patient.

Specifically, the driving assembly 8 comprises a driving ring 81, a driving wire 82, a plurality of driving blocks 83 and a plurality of driving grooves 84, the driving ring 81 is arranged in the adjusting cavity 6 and is in sliding fit with the adjusting cavity, the plurality of driving grooves 84 are all arranged on the bracket body 1, all the driving grooves 84 are located between the driving ring 81 and the supporting ring 41, two ends of all the driving blocks 83 are respectively fixedly connected with the driving ring 81 and the supporting ring 41, and each driving block 83 is in sliding fit with the corresponding driving groove 84; the specific operating principle of drive wire drawing 82 is the same as the principle of adjusting trombone slide 2 and adjusting wire drawing 3, and the description is omitted here, and the during operation drives drive ring 81 through drive wire drawing 82 and moves, and drive ring 81 drives through drive block 83 and includes that backing ring 41 moves, and then drives and include that backing assembly 4 carries out work.

Specifically, the front end and the rear end of each support-stretching piece 43 are provided with arc parts 11 which are bent towards the axis of the bracket body 1; the arrangement is such that the inner wall of the blood vessel is not scratched when the bracketing piece 43 bracketing the inner wall of the blood vessel.

Specifically, the front end of each of the supporting pieces 43 extends forward to exceed the front end of the bracket body 1; with reference to fig. 4, the detailed structure mainly includes that the supporting component 4 extends the front end of the supporting piece 43 beyond the front end of the stent body 1 in the supporting state, so that the supporting component 4 supports the front blood vessel in a supporting manner, on one hand, the supporting component can play a good role in fixing the stent body 1, and on the other hand, the plaque cutting component 5 can be conveniently recycled.

Specifically, the cutting net 51 and the two support nets 53 are both made of memory metal material; the cutting net 51 and the two holding nets 53 can be conveniently restored to the working shape after being separated from the stent body 1, and the thrombus plaque can be conveniently cut.

Specifically, the cutting net 51 and the leakage-proof net 9 are both provided with head developing marks; the positions of all corresponding parts can be observed conveniently during work, so that the adjustment is convenient.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cutting stent for recovering intracranial arterial plaque is characterized in that: comprises a bracket body (1), an adjusting pull pipe (2), an adjusting wire drawing (3), a support component (4) and a patch cutting component (5), wherein the bracket body (1) is internally provided with an adjusting cavity (6), the adjusting pull pipe (2) is arranged in the adjusting cavity (6), the adjusting wire drawing (3) is arranged in the adjusting pull pipe (2), the front end of the bracket body (1) is provided with an installation step (7), the support component (4) is arranged on the installation step (7), the adjusting cavity (6) is internally provided with a driving component (8) for controlling the support component (4) to work, the front end of the adjusting wire drawing (3) is provided with a connector (10), the patch cutting component (5) is arranged between the connector (10) and the bracket body (1), the patch cutting component (5) comprises a cutting net (51), a support air bag (52) and two support nets (53), two ends of the cutting net (51) are respectively fixedly connected with the adjusting pull pipe (2) and the bracket body (10), one end of the two support nets (53) is fixedly connected with the adjusting pull pipe (2), and the middle of the two support nets (53), and the middle of the two support nets (51) is connected with the adjusting wire drawing net (3), the support-drawing air bag (52) is located in the middle of two support-drawing nets (53), the support-drawing air bag (52) supports the cutting net (51) through the support-drawing nets (53), the cutting net (51) and the two support-drawing nets (53) are both made of memory metal materials, the support-drawing assembly (4) comprises support-drawing rings (41), a plurality of support-drawing rods (42) and a plurality of support-drawing sheets (43), the support-drawing sheets (43) encircle the front end of the support body (1), the lower end of each support-drawing sheet (43) is provided with two connecting rods (44) with one ends hinged to each other and parallel to each other, the other ends of the connecting rods (44) are hinged to the support body (1), the support-drawing rings (41) are sleeved at the front end of the support body (1) and the support-drawing rings (41) are in sliding fit with the support body (1), and the other ends of the support-drawing rods (42) are hinged to the middle of the connecting rods (44).

2. The intracranial arterial plaque recovery cutting stent as defined in claim 1, wherein: drive assembly (8) are including driving ring (81), drive wire drawing (82), a plurality of drive piece (83) and a plurality of drive groove (84), drive ring (81) set up in adjusting chamber (6) and sliding fit between the two, a plurality of drive groove (84) all set up on support body (1) and all drive groove (84) all are located drive ring (81) and draw between backing ring (41), all the both ends of drive piece (83) respectively with drive ring (81) with draw backing ring (41) fixed connection and every drive piece (83) all with its drive groove (84) sliding fit who corresponds.

3. The intracranial arterial plaque recovery cutting stent of claim 1, wherein: the front end and the rear end of each support drawing sheet (43) are respectively provided with an arc part (11) which is bent towards the axis of the support body (1).

4. The intracranial arterial plaque recovery cutting stent of claim 1, wherein: the front end of each supporting sheet (43) extends forwards until the front end of the bracket body (1) is exceeded.

5. The intracranial arterial plaque recovery cutting stent as defined in claim 1, wherein: the cutting nets (51) are all provided with head developing marks.