Cutting piece of thrombus breaker

Abstract

The cutting piece comprises a polymer piece and a cutting claw, the polymer piece is of a hollow columnar structure, clamping claw mounting holes are formed in the two axial ends of the polymer piece respectively, clamping claw grooves are formed in the side wall of the polymer piece in the axial direction, and the near end of the polymer piece is suitable for being fixedly connected with the far end of a core wire of the thrombus breaker; the cutting claw is arranged in the clamping claw groove, the two ends of the cutting claw penetrate through clamping claw installation holes formed in the two ends of the macromolecule piece respectively, the near end of the cutting claw is fixedly connected with the far section of a core wire of the thrombus breaker, the far end of the cutting claw is located in the macromolecule piece in a sliding mode, and the cutting claw is driven to be unfolded or compressed. The macromolecule part and the cutting claw move back and forth to cut thrombus in all directions, the metal alloy cutting claw can adjust gears in a blood vessel after thrombectomy cutting is completed so that the distribution diameter of the cutting claw can be decreased, the conveying core wire is rotated to drive the macromolecule part and the metal alloy cutting claw to rotate, and the thrombus and the blood vessel wall are stripped.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a cutting component of a thrombus breaker. Background Technology

[0002] Thrombosis can occur in human blood vessels for various reasons, involving both the arterial and venous systems. When drug treatment fails to eliminate the thrombus, medical instruments are needed to break it up and remove it. Currently, a hollow catheter is often inserted into the blood vessel at the site of thrombus formation, and then a suction device is used to draw the thrombus into the catheter and remove it from the body. However, because some thrombi have been formed for a long time and are quite hard, the suction catheter may not be able to draw the thrombus in and remove it from the body. For these harder thrombi, a cup-shaped thrombectomy guidewire is used to cut the thrombus. In existing techniques, the cutting direction may deviate and damage the blood vessel wall, potentially prolonging the operation time, making the procedure more difficult, and thus increasing the difficulty and risk of the surgery. Utility Model Content

[0003] In view of this, this application proposes a cutting element for a thrombus breaker that efficiently cuts thrombi while avoiding damage to the inner wall of blood vessels.

[0004] According to one aspect of this application, a cutting element for a thrombus breaker is provided, comprising: a polymer component and a cutting claw;

[0005] The polymer component is a hollow columnar structure with claw mounting holes at both ends along the axial direction. The sidewall of the polymer component has claw grooves along the axial direction, and the proximal end of the polymer component is suitable for fixing and connecting the distal end of the core wire of the thrombus breaker.

[0006] The cutting claw is disposed in the claw groove, and its two ends pass through the claw mounting holes opened at both ends of the polymer component. The proximal end of the cutting claw is fixedly connected to the distal end of the core wire of the thrombus breaker, and the distal end is slidably located inside the polymer component, which drives the cutting claw to unfold or compress.

[0007] In one possible implementation, the jaw mounting hole includes a first jaw mounting hole and a second jaw mounting hole;

[0008] The first claw mounting hole is formed on the proximal sidewall of the polymer component and communicates with the interior of the polymer component;

[0009] The second claw mounting hole is formed on the distal sidewall of the polymer component, communicates with the interior of the polymer component, and is spaced at a predetermined distance from the distal end of the polymer component.

[0010] In one possible implementation, the opening length of the jaw groove is greater than the cross-sectional length of the cutting jaw in a compressed state.

[0011] In one possible implementation, there are two or more claw grooves, spaced apart circumferentially along the polymer component.

[0012] In one possible implementation, each of the said claw grooves has at least one or more said cutting claws inside.

[0013] In one possible implementation, the sidewall of the polymer component is provided with a groove along the circumferential direction. The groove has an annular cross-section, and there are two or more grooves spaced apart along the axial direction of the polymer component.

[0014] In one possible implementation, the cutting claw is arc-shaped and can be compressed into a straight line.

[0015] In one possible implementation, the proximal bending angle of the cutting claw is smaller than the distal bending angle of the cutting claw.

[0016] In one possible implementation, the polymer component has tapered ends.

[0017] In one possible implementation, the opening depth of the claw groove is greater than the opening depth of the groove;

[0018] The plurality of said claw grooves separate the grooves, and the plurality of said grooves are serrated.

[0019] The beneficial effects of the cutting component of the thrombus fragmentation device in this application embodiment are as follows: The polymer component has tapered ends, resulting in less resistance when passing through harder thrombi, and serrated grooves on the edges increase overall flexibility and bending ability, allowing it to reach more distant and tortuous vascular environments. The polymer component has long vertical grooves for the claws, within which metal alloy cutting claws are distributed. Driven by the delivery mandrel, the polymer component and cutting claws move back and forth, cutting the thrombus from all directions. After the thrombus is cut, the metal alloy cutting claws can be adjusted within the blood vessel to reduce their diameter. At this point, rotating the delivery mandrel drives the polymer component and metal alloy cutting claws to rotate, separating the thrombus from the vessel wall and preventing thrombus residue from remaining on the inner wall of the vessel, thus ensuring a thorough treatment. Finally, after the thrombus is completely cut, successful thrombectomy is achieved using a suction catheter. In this way, while efficiently cutting thrombi, damage to the inner wall of the blood vessel can be avoided.

[0020] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0022] Figure 1 This invention provides a schematic diagram of the main structure of a thrombus breaker according to an embodiment of this application.

[0023] Figure 2 A schematic diagram of the main structure of the cutting claw of the thrombus breaker according to an embodiment of this application is shown;

[0024] Figure 3 A schematic diagram of the main structure of the polymer component of the thrombus breaker according to an embodiment of this application is shown;

[0025] Figure 4 This diagram shows the main structure of the thrombus breaker outlet catheter according to an embodiment of this application;

[0026] Figure 5 This diagram shows a partially enlarged schematic of the main structure of the cutting component according to an embodiment of this application;

[0027] Figure 6 This diagram illustrates the main structure of the cutting element of the thrombus breaker, as shown in an embodiment of this application, located inside the catheter. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0032] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the cutting component of the thrombus breaker in this embodiment includes a polymer component 1 and a cutting claw 2. The polymer component 1 is a hollow columnar structure with claw mounting holes 4 at both ends along the axial direction. The sidewall of the polymer component 1 has a claw groove 14 along the axial direction. The proximal end of the polymer component 1 is suitable for fixedly connecting to the distal end of the core wire 6 of the thrombus breaker. The cutting claw 2 is disposed in the claw groove 14, with both ends passing through the claw mounting holes 4 at both ends of the polymer component 1. The proximal end of the cutting claw 2 is fixedly connected to the distal end of the core wire 6 of the thrombus breaker, and the distal end is slidably located inside the polymer component 1, causing the cutting claw 2 to unfold or compress.

[0034] The polymer component 1 has a claw groove 14 along its axial direction on its sidewall. The claw groove 14 acts like a track, providing the necessary space and guidance for the smooth movement of the cutting claw 2, enhancing the stability of the cutting claw 2 during operation, and making the cutting action more precise and efficient. The proximal end of the polymer component 1 is connected to the distal end of the core wire 6 of the thrombus 9 breaker for fixing the polymer component 1. The cutting claw 2 is placed in the claw groove 14, and its two ends pass through the claw mounting holes 4 at both ends of the polymer component 1. The distal end of the cutting claw 2 can slide flexibly inside the polymer component 1. This design mechanism allows the cutting claw 2 to quickly unfold when needed to cut the thrombus 9 with a sharp edge; when not needed, it can be tightly compressed to reduce potential damage to the blood vessel wall.

[0035] In this embodiment, the polymer component 1 has tapered ends, which reduces resistance when passing through harder thrombi 9. It also has serrated grooves 13 along its edges, increasing overall flexibility and bending ability, allowing it to reach more distant and tortuous vascular environments. The polymer component 1 has long, vertically oriented claw grooves 14, within which metal alloy cutting claws 2 are installed. Driven by the delivery wire 6, the polymer component 1 and cutting claws 2 move back and forth, cutting the thrombus 9 from all directions. After the thrombus removal and cutting are completed, the metal alloy cutting claws 2 can be adjusted within the blood vessel to reduce their diameter. At this point, rotating the delivery wire 6 causes the polymer component 1 and metal alloy cutting claws 2 to rotate, separating the thrombus 9 from the blood vessel wall, preventing thrombus 9 from remaining on the inner wall of the blood vessel, thus ensuring a thorough treatment. Finally, after the thrombus 9 is completely cut, the thrombus is successfully removed using the aspiration catheter 8.

[0036] In one specific embodiment, participants Figure 5 The claw mounting holes 4 include a first claw mounting hole 4 and a second claw mounting hole 4. The first claw mounting hole 4 is located on the proximal sidewall of the polymer component 1 and communicates with the interior of the polymer component 1. The second claw mounting hole 4 is located on the distal sidewall of the polymer component 1 and communicates with the interior of the polymer component 1. The second claw mounting hole 4 and the distal end of the polymer component 1 are spaced apart by a preset distance. The middle part of the cutting claw 2 is located on the outside of the polymer component 1 and corresponds to the claw groove 14. The proximal end of the cutting claw 2 passes through the first claw mounting hole 4 and is fixedly connected to the distal end of the core wire 6 together with the proximal end of the polymer component 1. The distal end of the cutting claw 2 passes through the second claw mounting hole 4 and can slide between the second claw hole and the distal end of the polymer component 1, or be fixed at a certain node, so that the cutting claw 2 is in an unfolded state or a compressed state.

[0037] Among them, the multiple cutting claws 2 in the unfolded state are lantern-shaped, and in the compressed state they can be stretched into straight strips. The angle of the proximal end of the claws is relatively gentle, making it easier to insert the catheter 8, while the angle of the distal end is larger, so that the contact area with the thrombus 9 is larger, which is more conducive to cutting the thrombus 9.

[0038] In one specific embodiment, the opening length of the claw groove 14 is greater than the cross-sectional length of the cutting claw 2 in the compressed state, ensuring that the cutting claw 2 can still be fully accommodated within the claw groove 14 in the fully compressed state, reducing the friction and potential damage between the cutting claw 2 and the blood vessel wall in the compressed state. The claw groove 14 provides sufficient buffer space for the movement of the cutting claw 2. During the unfolding or compression of the cutting claw 2, even if unexpected resistance or improper operation is encountered, the extra length of the groove 13 can effectively prevent the cutting claw 2 from suddenly dislodging or being damaged, ensuring the safe conduct of the operation.

[0039] In one specific embodiment, there are two or more claw grooves 14, which are spaced apart circumferentially along the polymer component 1, and each claw groove 14 has at least one cutting claw 2 inside. Each claw groove 14 is provided with a cutting claw 2, and there is at least one cutting claw 2 inside the claw groove 14. Multiple claw grooves 14 are opened circumferentially along the polymer component 1, and the opening direction of the multiple claw grooves 14 is the same.

[0040] Since each claw groove 14 has a cutting claw 2 inside, the area for cutting the thrombus 9 is increased.

[0041] Furthermore, each claw groove 14 is provided with one or more cutting claws 2, which can further increase the area of ​​cutting thrombus 9 and the efficiency of cutting thrombus 9.

[0042] In one specific embodiment, the sidewall of the polymer component 1 is provided with a groove 13 along the circumferential direction. The groove 13 has an annular cross-section, and there are two or more grooves 13, which are spaced apart along the axial direction of the polymer component 1 to improve the axial flexibility of the polymer component 1. The multiple grooves 13 arranged at equal intervals ensure that the flexibility of the polymer component 1 is the same at all positions along the axial direction.

[0043] In one specific embodiment, the cutting claw 2 is arc-shaped and can be compressed into a straight line. In its natural state, the cutting claw 2 bulges out in a lantern shape and is evenly distributed. The number of cutting claws 2 is arranged according to the number of grooves 13. The distal end of the cutting claw is not fixed, so that it can conform to the delivery core wire 6 in the environment of the catheter 8 and can expand in the vascular environment to complete the retrieval and release.

[0044] In one specific embodiment, the proximal bending angle of the cutting claw 2 is smaller than the distal bending angle of the cutting claw 2. The proximal angle of the cutting claw 2 is gentler, making it easier to insert the catheter 8, while the distal angle is larger, resulting in a larger contact area with the thrombus 9, which is more conducive to cutting the thrombus 9.

[0045] In one specific embodiment, the polymer component 1 has a tapered structure at both ends, which reduces resistance when passing through a harder thrombus 9, thus solving the problem that guide wires and other devices cannot pass through a harder thrombus 9.

[0046] In one specific embodiment, the opening depth of the claw groove 14 is greater than the opening depth of the groove 13. Multiple claw grooves 14 separate the groove 13, and the multiple grooves 13 are serrated. The mutual cooperation of the claw grooves 14 and the grooves 13 results in a serrated structure on the outer sidewall of the polymer component 1, thereby improving the overall flexibility and bending ability of the polymer component 1. This allows it to reach more distant and tortuous vascular environments, solving the problem of not being able to reach more distant and difficult blood vessels. The serrated grooves 13 increase the power transmission efficiency when the cutting claw 2 unfolds, making the thrombus fragmentation 9 more efficient. They also enhance the surface friction of the polymer component 11, helping to maintain positional stability in complex vascular environments.

[0047] In one specific embodiment, participants Figure 4 and Figure 6 1. Polymer material molded parts are fixed to the delivery core wire 6 using processes such as dispensing, in three or more sets. 2. Compressible metal alloy cutting claws 2 are distributed within the vertical grooves 13 of the polymer material molded parts. The proximal claw rings pass through the delivery core wire 6 and reach the interior of the polymer material molded parts, with a distance between their proximal ends and the proximal ends of the polymer material molded parts until they are visible within the gaps of the proximal vertical grooves 13. They are fixed to the core wire 6 using processes such as laser welding. In their natural state, the cutting claws 2 are lantern-shaped and evenly distributed; the number of cutting claws 2 is determined by the number of grooves 13. The distal ends of the cutting claws 2 are not fixed, allowing them to conform to the delivery core wire 6 within the catheter 8 environment and expand within the vascular environment for retrieval and release. 3. A limiting imaging ring is made of radiopaque material and is fixed to the delivery core wire 6 in the middle position of a set of vertical grooves 13 of the polymer material molded parts, as shown in the figure, using processes such as laser welding. While providing imaging, it limits the distal claw ring from excessive expansion beyond its effective position. 4. Magnetic blocks are distributed along the movement path of the distal claw ring and fixed to the conveying core wire 6. A magnetic control handle connected to the near end of the conveying guide wire is attached to these blocks, allowing control of the distal claw ring's position along its movement path. Specifically, the outer diameter of the cutting claw 2 ring can be adjusted via the stop block on the control handle. 5. The distal developing flexible section is made of radiopaque metal wire, with its distal end flush with and welded to the distal end of the conveying core wire 6 to form a ball head. Its near end is connected to a polymer material molded part.

[0048] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A cutting component for a thrombus breaker, characterized in that, include: Polymer components and cutting claws; The polymer component is a hollow columnar structure with claw mounting holes at both ends along the axial direction. The sidewall of the polymer component has claw grooves along the axial direction, and the proximal end of the polymer component is suitable for fixing and connecting the distal end of the core wire of the thrombus breaker. The cutting claw is disposed in the claw groove, and its two ends pass through the claw mounting holes opened at both ends of the polymer component. The proximal end of the cutting claw is fixedly connected to the distal end of the core wire of the thrombus breaker, and the distal end is slidably located inside the polymer component, which drives the cutting claw to unfold or compress.

2. The cutting component of the thrombus breaker according to claim 1, characterized in that, The jaw mounting holes include a first jaw mounting hole and a second jaw mounting hole. The first claw mounting hole is formed on the proximal sidewall of the polymer component and communicates with the interior of the polymer component; The second claw mounting hole is formed on the distal sidewall of the polymer component, communicates with the interior of the polymer component, and is spaced at a predetermined distance from the distal end of the polymer component.

3. The cutting component of the thrombus breaker according to claim 2, characterized in that, The interior of the claw groove is provided with at least two cutting claws.

4. The cutting component of the thrombus breaker according to any one of claims 1-3, characterized in that, The cutting claw is arc-shaped and can be compressed into a straight line.

5. The cutting component of the thrombus breaker according to claim 4, characterized in that, The proximal bending angle of the cutting claw is smaller than the distal bending angle of the cutting claw.

6. The cutting component of the thrombus breaker according to claim 4, characterized in that, The claw grooves are two or more, and are spaced apart along the circumference of the polymer component; The cross-sections of the multiple unfolded cutting claws increase along the axial direction of the polymer component and then gradually decrease.

7. The cutting component of the thrombus breaker according to claim 4, characterized in that, The opening length of the jaw groove is greater than the cross-sectional length of the cutting jaw in the compressed state.

8. The cutting component of the thrombus breaker according to claim 6, characterized in that, The sidewall of the polymer component has a groove along the circumference. The groove has an annular cross-section and there are two or more grooves, which are spaced apart along the axial direction of the polymer component.

9. The cutting component of the thrombus breaker according to claim 8, characterized in that, The polymer component has a tapered structure at both ends.

10. The cutting component of the thrombus breaker according to claim 9, characterized in that, The depth of the claw groove is greater than the depth of the groove itself; The plurality of said claw grooves separate the grooves, and the plurality of said grooves are serrated.

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