Thrombus breaker

Abstract

The thrombus breaker comprises a polymer part, a cutting claw, a conveying core wire, a magnetic attraction block and a magnetic attraction control handle, the polymer part is of a hollow columnar structure, clamping claw mounting holes are formed in the two axial ends of the polymer part respectively, and clamping claw grooves are formed in the side wall of the polymer part in the axial direction; the two ends of the cutting claw penetrate through clamping claw mounting holes in the two axial ends of the macromolecule part respectively, the far end of the conveying core wire is fixedly connected with the near end of the macromolecule part and the near end of the cutting claw respectively, the magnetic attraction block is arranged at the far end in the macromolecule part, and the magnetic attraction control handle is connected with the control line and electrically connected with the magnetic attraction block to control the magnetic attraction block to magnetically attract the cutting claw. The far end of the cutting claw is driven to move in the axial direction of the high-molecular part, the high-molecular part and the cutting claw move front and back to cut thrombus in all directions, the diameter of the cutting claw can be reduced through the cutting claw after thrombus extraction cutting is completed, the conveying core wire drives the high-molecular part and the cutting claw to rotate or move in the axial direction, and the thrombus and the blood vessel wall are stripped. The thrombus is cut on the premise that the vascular wall is not scratched.

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 human 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 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, due to the long formation time of some thrombi and the high hardness of the thrombi, it is difficult for the thrombus suction catheter to suck the thrombus and output it outside 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 impossible to effectively cut and break the 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 opened at two axial ends, and a claw groove is opened along the axial direction on the side wall of the polymer part, the cutting claw is arranged in the claw groove, and the two ends respectively pass through the claw mounting holes at the two 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 and drive the distal end of the cutting claw to move axially along the polymer component.

[0008] In a 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 component, and the second claw mounting hole is located at the distal end of the polymer component and is spaced a preset distance from the distal end of the polymer component.

[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 more than two 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 remote magnetic connection between different magnetic blocks and the cutting claw respectively.

[0012] In a possible implementation, the cutting claw is arc-shaped and can be compressed to 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 manner, at least two cutting claws are disposed 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 annular structure;

[0020] There are two fixing rings, one of which is fixedly connected to the proximal ends of the multiple cutting claws and 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 component.

[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 component along the circumferential direction. The groove is annular, and there are multiple grooves that are evenly spaced along the axial direction of the polymer component.

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

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

[0025] In a possible implementation manner, two ends of the polymer component are in a conical structure.

[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 on the polymer part is axially provided with a long vertical claw groove, 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 are completed, the cutting claw can adjust the gear position in the blood vessel to make the distribution diameter of the cutting claw smaller. At this moment, the rotating conveying core wire drives the polymer part and the cutting claw to rotate or move axially, peeling the thrombus from the blood vessel wall, avoiding the thrombus remaining on the inner wall of the blood vessel, cutting the thrombus without scratching the blood vessel wall, and 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 present application and, together with the description, serve to explain the principles of the present application.

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

[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 breaker according to an embodiment of the present application;

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

[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 of the main structure showing the position of the limiting developing ring and the magnetic suction 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] Fig. 9 Another schematic diagram showing the main structure of the thrombus disruptor according to an embodiment of the present application;

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

[0039] Fig.11 Another schematic diagram showing the thrombus disruptor of an embodiment of the present application in a catheter;

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

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

[0042] Fig.14 Two schematic diagrams of 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 specified.

[0044] Among them, 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 indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and 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, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter 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, and claw mounting holes are respectively opened 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 both 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 arranged inside the magnetic control handle 7. By pressing different buttons, different magnetic blocks 4 can be controlled to be magnetically connected with the far end of the cutting claw 2 to complete the compression or expansion of the cutting claw 2.

[0050] Among them, in this application, the part close to the magnetic controller is called the proximal end, and the part far away from the magnetic controller is called 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 on the polymer part 1 is provided with a long vertical claw groove 14 along the axial direction, and the cutting claw 2 is 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 are completed, the cutting claw 2 can adjust the gear position in the blood vessel to reduce the distribution diameter of the cutting claw 2. At this moment, the rotating delivery core wire 6 drives the polymer part 1 and the cutting claw 2 to rotate or move axially, and the thrombus 9 is separated from the blood vessel wall, avoiding the thrombus 9 remaining on the inner wall of the blood vessel. The thrombus 9 is cut without scratching the blood vessel wall. Finally, after the thrombus 9 is completely cut, the suction catheter 8 is used to achieve successful thrombus removal.

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

[0053] Furthermore, the magnetic attraction controller can control the magnetic attraction of the magnetic attraction block 4, and then control the cutting claw 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 component 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 component 1, and then the state of the cutting claw 2 is controlled by the magnetic block 4 and the magnetic controller.

[0055] In a specific embodiment, there are more than two magnetic blocks 4, which are spaced apart along the axial direction of the polymer part 1. The more than two magnetic blocks 4 are all arranged inside the polymer part 1, and are all located between the second claw mounting hole and the distal end of the polymer part 1. Since the magnetic block 4 controls whether it has magnetic force through a magnetic controller, the distal end of the cutting claw 2 is magnetically connected to a specific magnetic block 4.

[0056] Among them, a plurality of magnetic blocks 4 are arranged at intervals 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 component 1, the deployment range of the cutting claw 2 is smaller, and 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 the present embodiment, the magnetic control handle 7 is electrically connected to more than two 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, which 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, so that the cutting claw 2 is semi-compressed; similarly, the third gear is when the cutting claw 2 becomes straight and completely fits the conveying 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 respectively connected.

[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 attraction 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 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 to magnetically attract the distal end of the cutting claw 2. Since the third magnetic block 4 is the farthest 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 component 1 to the position of the thrombus 9, or to recover the polymer component 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 a specific embodiment, the cutting claw 2 is arc-shaped in a natural state and can be compressed to a straight state. The cutting claw 2 is first longitudinally laser cut from a metal tube, and then heat-treated to be shaped like a lantern, and can be stretched into a straight strip in a compressed state. The proximal angle of the cutting claw 2 is relatively gentle, which is more convenient for receiving the catheter 8, and the distal angle of the cutting claw 2 is relatively large, so that the area contacting the thrombus 9 is larger, which is more conducive to cutting the thrombus 9.

[0065] Furthermore, in the present embodiment, the length of the claw groove 14 axially opened 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, and 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 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 conduct of the operation.

[0067] In a specific embodiment, the claw groove 14 is provided on the outside of the columnar polymer part 1 and is provided along the axial direction of the polymer part 1, providing a location for the cutting claw 2 to be folded and installed. The claw groove 14 is provided for folding the compressed claw and providing a location for the compressed claw. The cutting claw 2 is 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 forward and backward to cut the thrombus 9 in all directions, solving the problem that the thrombus 9 cannot be cut in some tricky 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 conduct of the operation.

[0070] In this embodiment, the polymer part 1 has a suitable balance of toughness, elasticity and hardness, ensuring its stable performance and safety in complex medical processes. 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, and 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, the polymer component 1 is a hollow structure with openings at both ends, wherein the hollow structure allows the delivery core wire 6 to pass through, thereby controlling whether the cutting claw 2 is in an expanded state or a compressed state. The polymer component 1 with a hollow structure reduces the overall weight, reduces fatigue during surgical operations, and improves the utilization efficiency and economic benefits of materials. In addition, the hollow structure also gives the polymer component 1 stronger flexibility and adaptability, allowing it to better adapt to blood vessel environments of different shapes and sizes.

[0072] In a specific embodiment, there are a plurality of claw grooves 14 , which are arranged at intervals along the circumference of the polymer component 1 .

[0073] The number of the claw grooves 14 can be one, two, three or four, etc., which needs to be selected according to the specific operation. The plurality of claw grooves 14 are arranged at equal intervals along the circumference of the polymer part 1, and a cutting claw 2 is arranged inside each claw groove 14. The cutting claws 2 inside the plurality of claw grooves 14 are simultaneously controlled to expand or compress by the magnetic block 4, so that the cutting claws 2 are arranged along the circumference of the polymer part 1, thereby improving the overall cutting range of the thrombus breaker and improving the cutting efficiency of the thrombus 9.

[0074] Furthermore, in the present embodiment, each claw groove 14 is provided with one, two, three or four cutting claws 2 in equal numbers. 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 a specific embodiment, the multiple expanded cutting claws 2 are in a lantern-like structure, and the cross-section of the multiple expanded cutting claws 2 increases and then gradually decreases along the axial direction of the polymer part 1. The multiple cutting claws 2 in the expanded state are in a lantern-like shape, and can be stretched into straight strips in the compressed state. The proximal angle of the claws is relatively gentle, which is more convenient for receiving the catheter 8, and the distal angle is relatively large, so that the contact area of ​​the thrombus 9 is larger, which is more conducive to cutting 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 blood vessel environment to complete recovery and release.

[0078] In a specific embodiment, it further includes: a fixing ring 3; a fixing ring 3-shaped hollow ring structure, two fixing rings 3, one fixing ring 3 is fixedly connected to the proximal ends of the multiple cutting claws 2 and connected to the delivery core wire 6, and the other fixing ring is fixedly connected to the distal ends of the multiple cutting claws 2, and is slidably arranged inside the polymer part 1. When there are multiple cutting claws 2, the fixing ring 3 is used to collect and fix the proximal ends of the cutting claws 2 or the distal ends of the cutting claws 2, so as to facilitate the control of the multiple 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 the multiple cutting claws 2, and the distal fixing ring 1023 is used to fix the distal ends of the 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, thereby 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 both 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 a specific embodiment, the limiting ring is a developing ring, which is a radiopaque metal, and its outer diameter is larger than the outer diameter of the cutting claw 2 ring, which can determine the position of the cutter and effectively limit the movement of the distal end of the cutting claw 2 ring to prevent the cutting claw 2 from over-expanding and exceeding the range of action. It is located on the delivery core wire 6 at the middle and distal position of a group of claw grooves 14 of the polymer part 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. A serrated groove 13 is provided on the outer side wall of the polymer part 1 to increase the overall flexibility and bending ability, so as to reach a farther and more tortuous vascular environment, thereby 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 positions 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, thereby 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 the multiple grooves 13 increases the overall toughness, thereby solving the problem that the guide wire cannot pass through the thrombus 99 from the optimal path due to the low rigidity of the polymer part 1, reducing the difficulty of the operation and improving the efficiency of the operation.

[0085] Furthermore, in this embodiment, a 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, any two adjacent grooves 13 are spaced at equal angles along the circumferential direction of the polymer component 1 , thereby ensuring that the polymer component 1 has the same flexibility in the circumferential direction.

[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 a plurality of grooves 13, and the plurality of grooves 13 are serrated. The claw groove 14 cooperates with the groove 13 so that the outer side wall of the polymer component 1 has a serrated structure, thereby improving the overall flexibility and bending ability of the polymer component 1, and can reach a farther and more tortuous vascular environment, thereby 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, so that the resistance to passing through the harder thrombus 9 is smaller, thereby solving the problem that the guide wire cannot pass through the 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, and claw mounting holes are opened at both ends of the axial direction, which is suitable for passing through the cutting claw 2 of the thrombus breaker, and the side wall of the polymer part 1 is provided with more than two first claw grooves 14 along the axial direction, and the first claw installation groove 13 matches the cutting claw 2, and the cutting claw 2 can be retracted inside the first claw groove 14, and the side wall of the first polymer part 11 is provided with a first groove 13 along the circumferential direction, and the first groove 13 is annular, and the second polymer part 12 is a columnar structure, and claw mounting holes are opened 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 axially opened with more than two second claw grooves 14, the second claw groove 13 matches the cutting claw 2, the cutting claw 2 can be retracted inside the second claw groove 14, and the side wall of the second polymer part 12 is circumferentially opened with a second groove 13, 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 part 11 and the second polymer part 12, so that the first polymer part 11 and the second polymer part 12 that are fixedly connected are connected to form a columnar structure. In this way, the columnar polymer part 1 having the first polymer part 11 and the second polymer part 12 can be equipped with two claws, further improving the thrombus 9 cutting ability of the thrombus breaker.

[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 connection portion is provided at one axial end of the first polymer component 11, and a second connection portion is provided at one axial end of the second polymer component 12. The first connection portion and the second connection portion are bolt structures, forming a columnar structure with both ends being tapered. In this way, since the claw grooves 14 on the first polymer component 11 and the second polymer component 12 are provided in parallel in the axial direction and do not overlap, the effect of the thrombus breaker in cutting the thrombus 9 is improved.

[0094] In a specific embodiment, it also includes: a distal soft developing section 5, which is wound with radiopaque metal wire, and its distal end 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 soft developing 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 soft developing section 5 is made of soft material, has good softness and compliance, can more easily pass through tortuous and narrow blood vessels, and reduce blood vessel 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 vessel while maintaining softness.

[0095] The combination of the softness and the development effect of the distal development soft section 5 helps the doctor to quickly place the catheter 8 at the target position and shorten the operation time. The distal development soft section 5 usually has good anti-bending ability and can keep the shape of the catheter 8 stable during the operation to avoid the surgical risks caused by bending. During the suction operation, the distal development soft section 5 can resist the influence of negative pressure and maintain the normal function of the catheter 8.

[0096] According to the above embodiment, the polymer part 1 is fixed on the conveying core wire 6 by a process such as dispensing glue, three or more groups, and the 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 conveying core wire 6 to reach the inside 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, and is fixed on the core wire by laser welding and other processes. The cutting claws 2 are bulging in a lantern shape and evenly distributed in the natural state, and 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 conveying core wire 6 in the environment of the catheter 8, and can expand in the blood vessel environment to complete the recovery and release. The limiting development ring is a non-radiopaque material, and is fixed on the conveying core wire 6 in the middle position of a group of vertical grooves 13 of the polymer molding part by laser welding and other processes, and the distal claw ring is limited from expanding too much and exceeding the action position while developing. The magnetic blocks 4 are distributed on the movement path of the distal claw ring and fixed on the delivery core wire 6. The magnetic control handle 7 connected to the proximal end of the delivery guide wire can control the position of the distal claw ring in the movement path. The outer diameter of the cutting claw 2 ring can be adjusted by the gear block on the control handle. The distal imaging soft section 5 is wound with non-radiopaque metal wire material, and its distal end 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 component 1.

[0097] Use of thrombus disruptor:

[0098] 1. The thrombus breaker pushes out the catheter 8, and inside the blood vessel, the cutting claw 2 recovers 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 claw 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 claw 2 also completely fits the inner wall of the cell.

[0100] 3. Adjust the gear position to reduce the distribution diameter of the cutting claws 2. 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.

[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 best path due to low rigidity, reduces the difficulty of surgery, and improves surgical efficiency. The two ends of the polymer part 1 are tapered structures, and the resistance through the harder thrombus 9 is smaller, 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, can reach a farther and more tortuous vascular environment, and solves the problem that it cannot reach farther and more difficult blood vessels. A long vertical claw groove 14 is provided on the polymer part 1, and the cutting claw 2 is distributed and installed in the groove 13. The rotation angle arrangement of multiple polymer parts 1 can make the cutting claw 2 arranged in one circle. Driven by the conveying 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 some tricky positions cannot cut the thrombus 9. The magnetic suction control method is novel and reliable, and the diameter of the cutting claw 2 can be accurately controlled only by the handle, and the operator is easy to operate.

[0102] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill 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 suction block and magnetic suction control handle; The polymer part is a hollow columnar structure, with claw mounting holes respectively opened at two axial ends, and a claw groove is opened along the axial direction on the side wall of the polymer part, the cutting claw is arranged in the claw groove, and the two ends respectively pass through the claw mounting holes at the two 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 and drive the distal end of the cutting claw to move axially along the polymer component.

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 component, and the second claw mounting hole is located at the distal end of the polymer component and is spaced a preset distance from the distal end of the polymer component.

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

4. The thrombus disruptor according to claim 3, characterized in that: There are more than two magnetic blocks, which are spaced apart along the axial direction of the polymer component.

5. The thrombus disruptor according to any one of claims 1 to 4, characterized in that: The magnetic control handle is electrically connected to more than two magnetic blocks respectively, and can control the magnetic connection between different magnetic blocks and the distal ends of the cutting claws respectively.

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

7. The thrombus disruptor according to claim 6, characterized in that: There are a plurality of claw grooves, which are arranged at intervals along the axial direction of the polymer component.

8. The thrombus disruptor according to claim 7, characterized in that: Any two adjacent grooves are spaced at equal angles along the circumference of the polymer component.

9. The thrombus disruptor according to claim 8, characterized in that: At least two cutting claws are arranged inside each of the claw grooves.

10. The thrombus disruptor according to claim 9, 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.

11. The thrombus disruptor according to claim 10, characterized in that: Also includes: Fixed ring; The fixed annular hollow annular structure; There are two fixing rings, one of which is fixedly connected to the proximal ends of the multiple cutting claws and 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 component.

12. The thrombus disruptor according to claim 11, characterized in that: The fixed ring is a developing ring.

13. The thrombus disruptor according to any one of claims 1 to 4, 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.

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

15. The thrombus disruptor according to any one of claims 1 to 4, characterized in that: The two ends of the polymer part are in a cone structure.

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