Thrombus disrupter

Abstract

The application relates to a thrombus breaker which comprises a polymer part, cutting claws, a delivery core wire, a magnetic attraction block and a magnetic attraction control handle. The polymer part is a hollow columnar structure, claw mounting holes are formed in the axial two ends of the polymer part, claw grooves are formed in the side wall of the polymer part along the axial direction, the two ends of the cutting claws pass through the claw mounting holes in the axial two ends of the polymer part, the distal end of the delivery core wire is fixedly connected with the proximal end of the polymer part and the proximal end of the cutting claws, the magnetic attraction block is arranged at the internal distal end of the polymer part, the magnetic attraction control handle is electrically connected with the magnetic attraction block through a control wire, the magnetic attraction block controls the cutting claws, the distal end of the cutting claws is driven to move along the axial direction of the polymer part, the polymer part and the cutting claws can move forward and backward to cut the thrombus in all directions, the cutting claws can reduce the diameter of the cutting claws after the thrombus is cut and removed, the polymer part and the cutting claws are driven by the delivery core wire to rotate or move axially, the thrombus is stripped from the blood vessel wall, and the thrombus is cut without scratching the blood vessel wall.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a thrombus disruptor. Background Art

[0002] There are various thrombi in the human body's blood vessels due to various reasons, involving the arterial system and the venous system. When drug treatment is difficult to eliminate the thrombi, medical devices are needed to break up and remove the thrombi. At present, a hollow catheter is often used to extend into the thrombus formation site in the blood vessel, and then a suction device is used to absorb the thrombus into the catheter and output it outside the human body. However, since some thrombi take a long time to form and the thrombus is relatively hard, it is difficult for the thrombus suction catheter to suck the thrombus out of the human body. For such harder thrombi, a bowl-shaped thrombus removal guide wire is used to cut the thrombus. However, because the thrombus removal guide wire is thin and has poor rigidity, it is unable to effectively cut and break up harder thrombi. The deviation of the guide wire tip causes damage to the blood vessel wall, which may prolong the operation time and make the operation more difficult, thereby increasing the difficulty and risk of the operation. Therefore, how to avoid the above-mentioned existing technical defects is still a problem that needs to be solved urgently. Summary of the Invention

[0003] In view of this, the present application proposes a thrombus breaker that will not damage the inner wall of the blood vessel when cutting the thrombus.

[0004] According to one aspect of the present application, there is provided a thrombus disruptor, comprising: a polymer component, a cutting claw, a delivery core wire, a magnetic block, and a magnetic control handle;

[0005] The polymer part is a hollow columnar structure, with claw mounting holes respectively formed at both axial ends, and claw grooves formed along the axial direction on the side wall of the polymer part. The cutting claws are arranged in the claw grooves, with both ends passing through the claw mounting holes at both axial ends of the polymer part.

[0006] The distal end of the delivery core wire is fixedly connected to the proximal end of the polymer component and the proximal end of the cutting claw respectively;

[0007] The magnetic block is arranged at the inner distal end of the polymer component and is spaced a preset distance from the claw mounting hole. The magnetic control handle is arranged at the proximal end of the core wire. The connecting control line is electrically connected to the magnetic block to control the magnetic block to magnetically attract the cutting claw, thereby driving the distal end of the cutting claw to move axially along the polymer component.

[0008] In one possible implementation, the claw mounting hole includes a first claw mounting hole and a second claw mounting hole, the first claw mounting hole is located at the proximal end of the polymer part, and the second claw mounting hole is located at the distal end of the polymer part, and is spaced a preset distance from the distal end of the polymer part.

[0009] In a possible implementation, the magnetic block is located between the second claw mounting hole and the distal end of the polymer component.

[0010] In a possible implementation, there are two or more magnetic blocks, which are spaced apart along the axial direction of the polymer component.

[0011] In a possible implementation, the magnetic control handle is electrically connected to two or more magnetic blocks respectively, and can control the magnetic connection between different magnetic blocks and the distal ends of the cutting claws respectively.

[0012] In a possible implementation, the cutting claws are arc-shaped and can be compressed into a straight state.

[0013] In a possible implementation, there are a plurality of claw grooves, which are spaced apart along the axial direction of the polymer component.

[0014] In a possible implementation, any two adjacent grooves are spaced at equal angles along the circumference of the polymer component.

[0015] In a possible implementation, at least two cutting claws are provided inside each of the claw grooves.

[0016] In a possible implementation, the plurality of deployed cutting claws are in a lantern-shaped structure;

[0017] The cross-sections of the multiple expanded cutting claws increase along the axial direction of the polymer component and then gradually decrease.

[0018] In a possible implementation, the device further includes: a fixing ring;

[0019] The fixed annular hollow ring structure;

[0020] There are two fixing rings, one of which is fixedly connected to the proximal ends of the multiple cutting claws and is connected to the conveying core wire, and the other fixing ring is fixedly connected to the distal ends of the multiple cutting claws and is slidably arranged inside the polymer part.

[0021] In a possible implementation, the fixing ring is a developing ring.

[0022] In a possible implementation, a groove is formed on the side wall of the polymer part along the circumferential direction. The groove is annular, and there are multiple grooves that are evenly spaced along the axial direction of the polymer part.

[0023] In a possible implementation, the depth of the claw groove is greater than the depth of the groove;

[0024] A plurality of claw grooves separate the grooves, and the plurality of grooves are sawtooth-shaped.

[0025] In a possible implementation, both ends of the polymer component are tapered.

[0026] The beneficial effects of the thrombus breaker of the embodiment of the present application: The thrombus breaker of the present application will not cause damage to the wall of the blood vessel and can efficiently cut the thrombus. Specifically, the side wall of the polymer part is provided with a long vertical claw groove along the axial direction, and the cutting claws are distributed and installed in the claw groove. Driven by the conveying core wire, the polymer part and the cutting claw move back and forth to cut the thrombus in all directions, solving the problem that the thrombus cannot be cut in some tricky positions. After the thrombus removal and cutting is completed, the cutting claw can be adjusted in the blood vessel to reduce the distribution diameter of the cutting claw. At this time, the rotating conveying core wire drives the polymer part and the cutting claw to rotate or move axially, separating the thrombus from the blood vessel wall, avoiding the thrombus remaining on the inner wall of the blood vessel, and cutting the thrombus without scratching the blood vessel wall. Finally, after the thrombus is completely cut, the suction catheter is used to successfully remove the thrombus.

[0027] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0029] Figure 1 A schematic diagram showing the main structure of the thrombus disruptor according to an embodiment of the present application is shown;

[0030] Figure 2 A schematic cross-sectional view of a polymer material of a thrombus disruptor according to an embodiment of the present application is shown;

[0031] Figure 3 A schematic diagram showing the main structure of a polymer component of a thrombus disruptor according to an embodiment of the present application;

[0032] Figure 4 A schematic diagram showing the main structure of the cutting claw of the thrombus disruptor according to an embodiment of the present application is shown;

[0033] Figure 5 A schematic diagram showing the main structure of the cutting claw wire of the thrombus disruptor according to an embodiment of the present application is shown;

[0034] Figure 6 A partially enlarged schematic diagram showing a thrombus disruptor according to an embodiment of the present application;

[0035] Figure 7 A schematic diagram showing the main structure of the position limiting developing ring and the magnetic block of an embodiment of the present application;

[0036] Figure 8 A schematic diagram showing the magnetic blocks corresponding to the gear positions of the handle controller according to an embodiment of the present application;

[0037] Figure 9 Another schematic diagram showing the main structure of the thrombus disruptor according to an embodiment of the present application;

[0038] Figure 10 A schematic diagram showing the configuration of a thrombus disruptor in a catheter according to an embodiment of the present application;

[0039] Figure 11 Another schematic diagram showing the thrombus disruptor of an embodiment of the present application inside a catheter;

[0040] Figure 12 A schematic diagram showing the thrombus disruptor of an embodiment of the present application being deployed in a catheter;

[0041] Figure 13 A schematic diagram showing the thrombus disruptor of an embodiment of the present application rotating within a catheter;

[0042] Figure 14 Schematic diagrams of two polymer parts according to an embodiment of the present application are shown. DETAILED DESCRIPTION

[0043] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0044] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0046] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0047] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0048] Figure 1 A schematic diagram showing the main structure according to an embodiment of the present application is shown. Figure 1 As shown, the thrombus breaker of the embodiment of the present application includes: a polymer part 1, a cutting claw 2, a conveying core wire 6, a magnetic block 4 and a magnetic control handle 7. The polymer part 1 is a hollow columnar structure, with claw mounting holes at both axial ends, and a claw groove 14 is opened on the side wall of the polymer part 1 along the axial direction. The cutting claw 2 is arranged in the claw groove 14, and the two ends pass through the claw mounting holes at both axial ends of the polymer part 1 respectively. The distal end of the conveying core wire 6 is fixedly connected to the proximal end of the polymer part 1 and the proximal end of the cutting claw 2 respectively. The magnetic block 4 is arranged at the inner distal end of the polymer part 1, and is spaced a preset distance from the claw mounting hole. The magnetic control handle 7 is arranged at the proximal end of the core wire, and the connecting control line is electrically connected to the magnetic block 4 to control the magnetic block 4 to magnetically attract the cutting claw 2, thereby driving the distal end of the cutting claw 2 to move along the axial direction of the polymer part.

[0049] Among them, a control chip is provided inside the magnetic control handle 7. By pressing different buttons, different magnetic blocks 4 can be controlled to be magnetically connected to the distal end of the cutting claw 2 to complete the compression or expansion of the cutting claw 2.

[0050] In this application, the part close to the magnetic controller is referred to as the proximal end, and the part far from the magnetic controller is referred to as the distal end.

[0051] In this embodiment, the thrombus breaker of the present invention will not cause damage to the wall of the blood vessel, and can efficiently cut the thrombus 9. Specifically, the side wall of the polymer part 1 is provided with a long vertical claw groove 14 along the axial direction, and the cutting claws 2 are distributed and installed in the claw groove 14. Driven by the delivery core wire 6, the polymer part 1 and the cutting claw 2 move back and forth to cut the thrombus 9 in all directions, solving the problem that the thrombus 9 cannot be cut in some tricky positions. After the thrombus removal and cutting is completed, the cutting claw 2 can adjust the gear position in the blood vessel to make the distribution diameter of the cutting claw 2 smaller. At this moment, the rotating delivery core wire 6 drives the polymer part 1 and the cutting claw 2 to rotate or move axially, peeling the thrombus 9 from the blood vessel wall, avoiding the thrombus 9 from remaining on the inner wall of the blood vessel, cutting the thrombus 9 under the premise of ensuring that the blood vessel wall will not be scratched, and finally, after the thrombus 9 is completely cut, the suction catheter 8 is used to successfully remove the thrombus.

[0052] In one embodiment, the jaw mounting holes include a first jaw mounting hole and a second jaw mounting hole. The first jaw mounting hole is located at the proximal end of the polymer component 1, and the second jaw mounting hole is located at the distal end of the polymer component 1, spaced a predetermined distance from the distal end of the polymer component 1. The proximal end of the cutting jaw 2 passes through the first jaw mounting hole and is fixedly connected to the distal end of the delivery core wire 6. The distal end passes through the second jaw mounting hole and slides between the second jaw mounting hole and the distal end of the polymer component 1.

[0053] Furthermore, the magnetic controller can control the magnetic attraction of the magnetic block 4, and further control the cutting claws 2 to be in an expanded state or a compressed state.

[0054] Furthermore, the second claw mounting hole is spaced a preset distance from the distal end of the polymer part 1, ensuring that the distal end of the cutting claw 2 can slide between the second claw mounting hole and the distal end of the polymer part 1, and then the state of the cutting claw 2 is controlled by the magnetic block 4 and the magnetic controller.

[0055] In one embodiment, there are two or more magnetic blocks 4, which are spaced apart along the axial direction of the polymer part 1. The two or more magnetic blocks 4 are all disposed inside the polymer part 1, and are all located between the second jaw mounting hole and the distal end of the polymer part 1. Since the magnetic blocks 4 are controlled by a magnetic controller to control whether they have magnetic force, the distal end of the cutting jaw 2 is magnetically attracted to a specific magnetic block 4 and connected thereto.

[0056] The plurality of magnetic blocks 4 are spaced apart along the axial direction of the polymer component 1 , and the cutting claws 2 are connected to different magnetic blocks 4 . The cutting claws 2 have different bending angles and different degrees of expansion.

[0057] When the distal end of the cutting claw 2 is closer to the distal end of the polymer part 1, the deployment range of the cutting claw 2 is smaller; when the distal end of the cutting claw 2 is closer to the second clamping claw mounting hole, the deployment range of the cutting claw 2 is larger.

[0058] Furthermore, in this embodiment, the magnetic control handle 7 is electrically connected to two or more magnetic blocks 4 respectively, and can control the magnetic connection between different magnetic blocks 4 and the distal ends of the cutting claws 2 respectively.

[0059] Specifically, there are three magnetic blocks 4. The magnetic blocks 4 are connected to the magnetic control handle 7 by means of a connecting line 71 to adjust the gear position of the cutting claw 2. Two or more gear positions can be configured, so that the distal claw ring changes position, thereby changing the outer diameter of the cutting claw 2, which is suitable for blood vessels of different diameters or different surgical needs. The three magnetic blocks 4 at the proximal, middle and distal ends of each claw groove 14 are respectively connected to the first, second and third gears of the magnetic control handle 7. The initial position of the magnetic control handle 7 is the first gear, that is, the proximal magnetic block 4 acts to make the cutting claw 2 naturally expanded; when the handle is moved to the second gear, the middle magnetic block 4 acts, and the distal claw ring of the cutting claw 2 is attracted, making the cutting claw 2 semi-compressed; similarly, the third gear is when the cutting claw 2 becomes straight and completely fits the delivery core wire 6. If there are multiple groups of vertical grooves 13 of the polymer component 1, the proximal, middle and distal magnetic blocks 4 of each group are connected separately.

[0060] In a specific embodiment, the three magnetic blocks 4 are spaced at equal distances, including a first magnetic block 4, a second magnetic block 4 and a third magnetic block 4, and the first magnetic block 4, the second magnetic block 4 and the third magnetic block 4 are arranged in sequence along the second claw mounting hole to the far end of the polymer part 1, and correspond to the first gear, the second gear and the third gear of the magnetic control handle 7 respectively.

[0061] Among them, when the magnetic control handle 7 is in the first gear, the first magnetic block 4 is electrically connected to the first gear of the magnetic control handle 7 through the connecting line 71, the second magnetic block 4 and the third magnetic block 4 are disconnected from the magnetic control handle 7, and the first magnetic block 4 generates a magnetic function to magnetically attract the distal end of the cutting claw 2. Since the first magnetic block 4 is closest to the second claw mounting hole, the cutting claw 2 can be in an expanded state, and the thrombus 9 can be cut by pulling or rotating the delivery core wire 6.

[0062] Among them, when the magnetic control handle 7 is in the second gear, the first magnetic block 4 is electrically connected to the second gear of the magnetic control handle 7 through the connecting line 71, the first magnetic block 4 and the third magnetic block 4 are disconnected from the magnetic control handle 7, and the second magnetic block 4 generates a magnetic function to magnetically attract the distal end of the cutting claw 2. Since the second magnetic block 4 is located between the first magnetic block 4 and the third magnetic block 4, the cutting claw 2 can be in a semi-expanded-semi-compressed state to cut the thrombus 9 located in the middle position.

[0063] Among them, when the magnetic control handle 7 is in the third gear, the third magnetic block 4 is electrically connected to the first gear of the magnetic control handle 7 through the connecting line 71, the second magnetic block 4 and the first magnetic block 4 are disconnected from the magnetic control handle 7, and the third magnetic block 4 generates a magnetic function, magnetically attracting the distal end of the cutting claw 2. Since the third magnetic block 4 is the farthest away from the second claw mounting hole, the cutting claw 2 can be retracted into the claw groove 14. At this time, the cutting claw 2 is in a compressed state, and is used to transport the cutting claw 2 and the polymer part 1 to the position of the thrombus 9, or to recover the polymer part 1 and the cutting claw 2 after the thrombus 9 is cut. The retracted cutting claw 2 can avoid scratching the inner wall of the blood vessel.

[0064] In one embodiment, the cutting claws 2 are naturally curved and can be compressed into a straight line. Cutting claws 2 are constructed from a metal tube, laser-cut longitudinally, and then heat-treated to form a lantern-like shape. When compressed, they can be stretched into straight strips. The proximal end of the cutting claws 2 has a relatively gentle angle, making it easier to insert into the catheter 8. The distal end of the cutting claws 2 has a larger angle, increasing contact area with the thrombus 9 and facilitating thrombus cutting.

[0065] Furthermore, in this embodiment, the length of the claw groove 14 opened axially on the polymer part 1 is greater than the straight length of the cutting claw 2 in the compressed state, so that the cutting claw 2 can be completely retracted in the claw groove 14. When the cutting claw 2 and the polymer part 1 are transported to the position of the thrombus 9 to cut the thrombus 9, or when the cutting claw 2 and the polymer part 1 are taken out after the thrombus 9 is cut, since the cutting claw 2 is in a compressed straight state and is located inside the claw groove 14, the inner wall of the blood vessel will not be damaged.

[0066] Among them, the thickness and width of the cutting claw 2 are both smaller than the claw groove 14 opened on the polymer part 1, ensuring that the claw groove 14 can completely cover the cutting claw 2, so that the cutting claw 2 will not exceed the top opening of the claw groove 14, and ensuring that the cutting claw 2 can still be fully accommodated in the claw groove 14 in a 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 process of expanding or compressing 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 falling out or being damaged, thereby ensuring the safe progress of the operation.

[0067] In one embodiment, a claw recess 14 is formed on the exterior of the columnar polymer component 1 and extends axially along the component 1, providing a location for the cutting claws 2 to be stowed and installed. The claw recess 14 is provided for stowing and retracting the compressed claws, providing a location for the compressed claws. The cutting claws 2 are distributed and mounted within the claw recess 14. Driven by the delivery core wire 6, the polymer component 1 and the cutting claws 2 move back and forth to cut the thrombus 9 in all directions, resolving the problem of being unable to cut thrombi 9 in some difficult locations.

[0068] Among them, the cross-section of the claw groove 14 along the axial direction is fan-shaped, that is, the side length gradually decreases toward the center position of the polymer part 1, and the cross-section side length at the opening position is the largest, which is convenient for retracting and unfolding the cutting claw 2, making the compression and unfolding of the cutting claw 2 smoother and more fluent.

[0069] Among them, the claw groove 14 runs through the axial ends of the polymer part 1, and 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 in 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 expansion or compression of the cutting claw 2, even if unexpected resistance or improper operation is encountered, the extra length of the claw groove 14 can effectively prevent the cutting claw 2 from suddenly falling out or being damaged, thereby ensuring the safe progress of the operation.

[0070] In this embodiment, the polymer part 1 has an appropriate balance of toughness, elasticity and hardness, ensuring its stable performance and safety in complex medical procedures. At the same time, its unique material composition enables it to seamlessly integrate into and adapt to the natural physiological environment of the human body. A developable barium sulfate component is incorporated into the polymer part 1. This design allows the structure of the molded part to be clearly displayed under X-ray irradiation, providing doctors with a more intuitive and accurate surgical field of view, greatly improving the accuracy and success rate of surgical operations.

[0071] Furthermore, polymer component 1 is a hollow structure with openings at both ends. This hollow structure allows for the passage of a delivery core wire 6, which in turn controls whether the cutting claws 2 are deployed or compressed. This hollow structure reduces overall weight, reduces fatigue during surgery, and improves material utilization and economic benefits. Furthermore, the hollow structure gives polymer component 1 greater flexibility and adaptability, enabling it to better adapt to blood vessels of varying shapes and sizes.

[0072] In a specific embodiment, there are multiple claw grooves 14 , which are spaced apart along the circumference of the polymer component 1 .

[0073] The number of claw grooves 14 can be one, two, three, or four, depending on the specific surgery. Multiple claw grooves 14 are evenly spaced along the circumference of the polymer component 1, and each claw groove 14 is provided with a cutting claw 2. The magnetic block 4 simultaneously controls the expansion or compression of the cutting claws 2 within the multiple claw grooves 14, allowing the cutting claws 2 to be arranged along the circumference of the polymer component 1, thereby increasing the overall cutting range of the thrombus disruptor and improving the efficiency of cutting the thrombus 9.

[0074] Furthermore, in this embodiment, each claw groove 14 is provided with one, two, three or four cutting claws 2. By increasing the number of cutting claws 2 in each claw groove 14, the cutting range and the cutting efficiency of the thrombus 9 are further improved.

[0075] The shapes of the cutting claws 2 are the same, and the bending angles, lengths and widths are also the same.

[0076] In one embodiment, the multiple deployed cutting claws 2 are lantern-shaped. The cross-section of the multiple deployed cutting claws 2 increases and then gradually decreases along the axial direction of the polymer material 1. The multiple cutting claws 2 are lantern-shaped in the deployed state and can be stretched into straight strips in the compressed state. The proximal ends of the claws have a relatively gentle angle, making them easier to insert into the catheter 8. The distal ends have a larger angle, which increases the contact area with the thrombus 9 and facilitates the cutting of the thrombus 9.

[0077] Among them, a single cutting claw 2 is arc-shaped and can be compressed to a straight state. The number of cutting claws 2 is arranged according to the number of grooves 13, and the cutting claws 2 are not fixed at the distal end, so that they can conform to the delivery core wire 6 in the catheter 8 environment and expand in the vascular environment to complete recovery and release.

[0078] In one embodiment, the device further comprises a fixing ring 3, which is a hollow ring-shaped structure. Two fixing rings 3 are provided, one of which is fixedly connected to the proximal ends of the plurality of cutting claws 2 and is connected to the delivery core wire 6, and the other is fixedly connected to the distal ends of the plurality of cutting claws 2 and is slidably disposed within the polymer component 1. When there are multiple cutting claws 2, the fixing ring 3 is used to collect and fix the proximal ends or the distal ends of the cutting claws 2, thereby facilitating control of the plurality of cutting claws 2.

[0079] Furthermore, the fixing ring 3 includes a proximal fixing ring 1013 and a distal fixing ring 1023. The proximal fixing ring 1013 is used to fix the proximal ends of multiple cutting claws 2, and the distal fixing ring 1023 is used to fix the distal ends of multiple cutting claws 2. The proximal ends of the multiple cutting claws 2 are fixed at circumferential intervals along the proximal fixing ring 1013, and the distal ends of the multiple cutting claws 2 are fixed at circumferential intervals along the distal fixing ring 1023, completing the fixation of the proximal fixing ring 1013 and the distal fixing ring 1023 and the multiple cutting claws 2.

[0080] Among them, the proximal fixing ring 1013 and the distal fixing ring 1023 are both embedded in the interior of the polymer part 1, and the proximal fixing ring 1013 and the proximal end of the polymer part 1 are fixedly connected to the distal end of the delivery core wire 6, and the distal fixing ring 1023 can be magnetically fixed to the magnetic block 4 in the polymer part 1 under the control of the magnetic control handle 7.

[0081] In one embodiment, the limiting ring is a radiopaque metal ring with an outer diameter larger than the outer diameter of the cutting claw 2 ring. This ring not only positions the cutter but also effectively limits the movement of the distal end of the cutting claw 2 ring, preventing the cutting claw 2 from over-expanding beyond its range. It is positioned on the delivery core wire 6 between the center and distal ends of a set of jaw recesses 14 in the polymer component 1.

[0082] In a specific embodiment, a groove 13 is provided on the side wall of the polymer part 1 along the circumferential direction. The groove 13 is annular, and there are multiple grooves 13, which are evenly spaced along the axial direction of the polymer part 1. The serrated grooves 13 are provided on the outer side wall of the polymer part 1 to increase the overall flexibility and bending ability, so that it can reach farther and more tortuous blood vessel environments, solving the problem of being unable to reach farther and more difficult blood vessels.

[0083] Furthermore, in this specific embodiment, there are multiple claw grooves 14, which are arranged at axial intervals along the polymer part 1. The claw grooves 1414 are opened to retract the compressed claws and provide a position for the compressed cutting claws 2. The cutting claws 2 are distributed and installed in the claw grooves 14. The rotation angle arrangement of multiple polymer material parts can make the cutting claws 2 arranged circumferentially. Driven by the conveying core wire 6, the polymer part 1 and the cutting claws 2 move back and forth to cut the thrombus 9 in all directions, solving the problem that the thrombus 9 cannot be cut in some tricky positions.

[0084] In a specific embodiment, the depth of the claw groove 14 is greater than the depth of the groove 13, so that the multiple grooves 13 on the side wall of the polymer part 1 have a serrated structure. The opening of multiple grooves 13 increases the overall toughness, solves the problem that the polymer part 1 has low rigidity and the guide wire cannot pass through the thrombus 99 from the optimal path, reduces the difficulty of the operation, and improves the efficiency of the operation.

[0085] Furthermore, in this embodiment, the plurality of grooves 13 are arranged at equal intervals along the axial direction of the polymer component 1 to ensure that the axial flexibility of the polymer component 1 is the same.

[0086] In a specific embodiment, the spacing angles of any two adjacent grooves 13 along the circumferential direction of the polymer component 1 are equal, ensuring that the flexibility of the polymer component 1 in the circumferential direction is the same.

[0087] In a specific embodiment, the opening direction of the claw groove 14 is perpendicular to the opening direction of the groove 13, and the claw groove 14 separates multiple grooves 13, and the multiple grooves 13 are serrated. The claw groove 14 cooperates with the groove 13 so that the outer side wall of the polymer part 1 has a serrated structure, thereby improving the overall flexibility and bending ability of the polymer part 1, and can reach farther and more tortuous blood vessel environments, solving the problem of being unable to reach farther and more difficult blood vessels.

[0088] Furthermore, in this embodiment, the multiple serrated grooves 13 increase the power transmission efficiency when the cutting claws 2 are deployed, making the thrombus 9 more efficiently broken, and also enhance the surface friction of the polymer component 1, which helps to maintain a stable position in a complex vascular environment.

[0089] In a specific embodiment, both ends of the polymer part 1 are tapered, which creates less resistance when passing through a harder thrombus 9 , thereby solving the problem that a guidewire or the like cannot pass through a harder thrombus 9 .

[0090] In a specific embodiment, in a specific embodiment, the polymer part 1 includes a first polymer part 11 and a second polymer part 12. The first polymer part 11 is a columnar structure with claw mounting holes at both ends of the axial direction, suitable for passing the cutting claw 2 of the thrombus breaker. The side wall of the polymer part 1 is provided with two or more first claw grooves 14 along the axial direction. The first claw groove 13 matches the cutting claw 2. The cutting claw 2 can be retracted inside the first claw groove 14. The side wall of the first polymer part 11 is provided with a first groove 13 along the circumferential direction. The first groove 13 is annular. The second polymer part 12 is a columnar structure with claw mounting holes at both ends of the axial direction. , suitable for passing through the cutting claw 2 of the thrombus breaker, the side wall of the polymer part 1 is provided with more than two second claw grooves 14 along the axial direction, the second claw groove 13 matches the cutting claw 2, and the cutting claw 2 can be retracted inside the second claw groove 14, and the side wall of the second polymer part 12 is provided with a second groove 13 along the circumferential direction, the second groove 13 is annular, and the axial end of the first polymer part 11 is connected to the circumferential end of the second polymer part 12, and is integrally formed, the opening direction of the first claw groove 14 is parallel to the opening direction of the second claw groove 14 and does not overlap, and the two each have independent claw grooves 14 and circumferential grooves 13.

[0091] In this embodiment, a claw can be placed on each of the first polymer member 11 and the second polymer member 12, so that the fixedly connected first polymer member 11 and the second polymer member 12 are connected to form a columnar structure. In this way, the columnar polymer member 1 having the first polymer member 11 and the second polymer member 12 can be equipped with two claws, further improving the thrombus 9 cutting ability of the thrombus disruptor.

[0092] Furthermore, the grooves 13 of the first polymer component 11 and the second polymer component 12 do not overlap in the axial direction, so that the cross-section or coverage area of ​​the two claws in the axial direction of the polymer component 1 is larger, further improving the cutting effect of the thrombus breaker.

[0093] Furthermore, a first connecting portion is provided at one axial end of the first polymer member 11, and a second connecting portion is provided at one axial end of the second polymer member 12. The first and second connecting portions are bolted together, forming a cylindrical structure with tapered ends. Thus, because the claw recesses 14 on the first and second polymer members 11, 12 are axially parallel and non-overlapping, the thrombus disruptor's effectiveness in cutting the thrombus 9 is enhanced.

[0094] In a specific embodiment, it also includes: a distal developing soft section 5, which is wound with a radiopaque metal wire, the distal end of which is flush with the distal end of the delivery core wire 6 and welded together to form a ball head, and the proximal end is connected to the polymer part 1. The distal developing soft section 5 usually has an excellent developing effect, which helps the doctor to clearly see the position of the catheter 8 in the blood vessel during the operation, so as to perform more precise surgical operations. Through the developing effect, the doctor can avoid the catheter 8 from entering non-target blood vessels or tissues by mistake, reducing surgical risks. The distal developing soft section 5 is made of a soft material with good softness and compliance, and can more easily pass through tortuous and narrow blood vessels, reducing vascular damage. Some catheters 8 also adopt a multi-level hardness gradient design, which provides the necessary support force to overcome the resistance in the blood vessels while maintaining softness.

[0095] The combination of the flexibility and visualization properties of the distal soft imaging section 5 helps the surgeon quickly position the catheter 8 at the target location, shortening surgical procedures. The distal soft imaging section 5 is generally resistant to flexing, maintaining the shape of the catheter 8 during surgery and avoiding surgical risks associated with flexing. During procedures such as suctioning, the distal soft imaging section 5 resists negative pressure, maintaining the normal function of the catheter 8.

[0096] According to the above embodiment, the polymer part 1 is fixed to the delivery core wire 6 by a process such as dispensing glue, and three or more groups of compressible cutting claws 2 are respectively distributed in the vertical grooves 13 of the polymer part 1. The proximal claw ring is passed through the delivery core wire 6 to reach the interior of the polymer part 1, and its proximal end is a distance away from the proximal end of the polymer molding part until it can be seen in the gap of the proximal vertical groove 13. It is fixed to the core wire by a process such as laser welding. The cutting claws 2 are bulging and evenly distributed in a lantern shape in the natural state. The number of cutting claws 2 is arranged according to the number of grooves 13. The distal claw ring 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 blood vessel environment to complete recovery and release. The limiting development ring is made of non-radiopaque material and is fixed to the delivery core wire 6 in the middle position of a group of vertical grooves 13 of the polymer molding part by a process such as laser welding. While developing, it limits the distal claw ring from expanding too much and exceeding the effective position. Magnetic blocks 4 are positioned along the distal claw ring's travel path and fixed to the delivery core wire 6. They are wired to a magnetic control handle 7 at the proximal end of the delivery guidewire, controlling the distal claw ring's position along its travel path. The outer diameter of the cutting claw 2 can be adjusted using a shift knob on the control handle. The distal, imaging-resistant flexible segment 5 is wound from radiopaque metal wire. Its distal end is flush with the distal end of the delivery core wire 6 and welded together to form a ball head. The proximal end is connected to the polymer component 1.

[0097] Use of thrombus disruptor:

[0098] 1. The thrombus breaker pushes out the catheter 8. Inside the blood vessel, the cutting claws 2 recover from the compressed state to the claw shape.

[0099] 2. The transport core wire 6 moves back and forth, which can drive the polymer component 1 and the cutting claws 2 to cut the thrombus 9 back and forth. When the resistance of the transport core wire 6 gradually decreases, the thrombus 9 is completely cut into vertical strips, and the cutting claws 2 are completely attached to the inner wall of the cell.

[0100] 3. Adjust the gear position to make the distribution diameter of the cutting claws 2 smaller. If necessary, rotate the delivery core wire 6 at a low angle to drive the polymer component 1 and the cutting claws 2 to rotate and peel off the thrombus 9 on the inner wall of the blood vessel. The suction catheter 8 cooperates with the suction at the proximal end to complete the thrombus removal work.

[0101] Among them, the polymer part 1 increases the overall toughness, solves the problem that the guide wire cannot pass through the thrombus 9 from the optimal path due to its low rigidity, reduces the difficulty of surgery, and improves surgical efficiency. The two ends of the polymer part 1 are tapered structures, which have less resistance to passing through the harder thrombus 9, solving the problem that the guide wire cannot pass through the harder thrombus 9. The edge of the polymer part 1 is provided with a serrated groove 13, which increases the overall flexibility and bending ability, and can reach farther and more tortuous vascular environments, solving the problem of being unable to reach farther and more difficult blood vessels. Long vertical claw grooves 14 are provided on the polymer part 1, and cutting claws 2 are distributed and installed in the grooves 13. The rotation angle arrangement of multiple polymer parts 1 can make the cutting claws 2 arranged in a circle. Driven by the conveying core wire 6, the polymer part 1 and the cutting claws 2 move back and forth to cut the thrombus 9 in all directions, solving the problem that the thrombus 9 cannot be cut in some tricky positions. The magnetic control method is novel and reliable. The diameter of the cutting claw 2 can be accurately controlled only by the handle, and the operator can operate it simply.

[0102] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not 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 selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A thrombus disruptor, characterized in that: include: Polymer parts, cutting claws, conveying core wire, magnetic block and magnetic control handle; The polymer part is a hollow columnar structure, with claw mounting holes respectively formed at both axial ends, and claw grooves formed along the axial direction on the side wall of the polymer part. The cutting claws are arranged in the claw grooves, with both ends passing through the claw mounting holes at both axial ends of the polymer part. The distal end of the delivery core wire is fixedly connected to the proximal end of the polymer component and the proximal end of the cutting claw respectively; The magnetic block is arranged at the inner distal end of the polymer component and is spaced a preset distance from the claw mounting hole. The magnetic control handle is arranged at the proximal end of the core wire. The connecting control line is electrically connected to the magnetic block to control the magnetic block to magnetically attract the cutting claw, thereby driving the distal end of the cutting claw to move axially along the polymer component. There are two or more magnetic blocks, which are spaced apart along the axial direction of the polymer component; The magnetic control handle is electrically connected to two or more magnetic blocks respectively, and can control the distal magnetic connection between different magnetic blocks and the cutting claws respectively. After the thrombectomy and cutting are completed, the cutting claws can adjust the gear position in the blood vessel to reduce the distribution diameter of the cutting claws.

2. The thrombus disruptor according to claim 1, characterized in that: The claw mounting hole includes a first claw mounting hole and a second claw mounting hole. The first claw mounting hole is located at the proximal end of the polymer part, and the second claw mounting hole is located at the distal end of the polymer part and is spaced a preset distance from the distal end of the polymer part.

3. The thrombus disruptor according to claim 2, characterized in that: The magnetic block is located between the second claw mounting hole and the distal end of the polymer component.

4. The thrombus disruptor according to any one of claims 1 to 3, characterized in that: The cutting claws are arc-shaped and can be compressed into a straight state.

5. The thrombus disruptor according to claim 1, characterized in that: There are a plurality of claw grooves, which are arranged at intervals along the axial direction of the polymer component.

6. The thrombus disruptor according to claim 5, characterized in that: The spacing angles between any two adjacent grooves along the circumference of the polymer component are equal.

7. The thrombus disruptor according to claim 6, characterized in that: At least two cutting claws are provided inside each of the claw grooves.

8. The thrombus disruptor according to claim 7, characterized in that: The plurality of expanded cutting claws are in a lantern-like structure; The cross-sections of the multiple expanded cutting claws increase along the axial direction of the polymer component and then gradually decrease.

9. The thrombus disruptor according to claim 8, characterized in that: Also includes: Fixed ring; The fixed annular hollow ring structure; There are two fixing rings, one of which is fixedly connected to the proximal ends of the multiple cutting claws and is connected to the conveying core wire, and the other fixing ring is fixedly connected to the distal ends of the multiple cutting claws and is slidably arranged inside the polymer part.

10. The thrombus disruptor according to claim 9, characterized in that: The fixed ring is a developing ring.

11. The thrombus disruptor according to any one of claims 1 to 3, characterized in that: A groove is formed on the side wall of the polymer part along the circumferential direction. The groove is annular, and there are a plurality of grooves which are arranged at equal intervals along the axial direction of the polymer part.

12. The thrombus disruptor according to claim 10, characterized in that: The depth of the claw groove is greater than the depth of the groove; A plurality of claw grooves separate the grooves, and the plurality of grooves are sawtooth-shaped.

13. The thrombus disruptor according to any one of claims 1 to 3, characterized in that: Both ends of the polymer part are in a tapered structure.

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