Thrombectomy device

Abstract

The invention provides a thrombectomy device, and belongs to the field of medical instruments. The rotor is rotatably connected to the first end of the guide pipe; the stator is mounted at the first end of the guide pipe, and the stator is arranged around the rotor; the rotor comprises at least one first shearing fin group, and when the number of the first shearing fin group is at least two, the at least two first shearing fin groups are arranged at intervals in the axial direction of the rotor; each first shearing fin group comprises a plurality of first shearing fins, and the plurality of first shearing fins of each first shearing fin group are arranged at intervals along the circumferential direction of the rotor. The purpose is to solve the problem that it is difficult to guarantee the thrombus extraction success rate and safety while guaranteeing the thrombus extraction efficiency through a thrombus extraction device in the prior art. The technical effect is that the thrombus extraction efficiency is guaranteed, and the thrombus extraction success rate and safety are guaranteed at the same time.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a thrombectomy device. Background Technology

[0002] In the treatment of vascular obstructive diseases, thrombectomy devices are the core instruments for achieving rapid recanalization of blood vessels. Existing thrombectomy devices mainly include three types: stent-type mechanical thrombectomy catheters, aspiration catheter devices, and mechanical thrombectomy devices. The stent-type mechanical thrombectomy catheter uses a retrievable, self-expanding braided metal mesh stent as its core. Guided by a guidewire, the stent is delivered through the catheter to the obstruction site. After the stent expands, it embeds the thrombus. Then, by pulling the stent, the thrombus is brought back into the catheter and withdrawn, thereby achieving vascular recanalization. Although this device can quickly relieve obstruction, the operation requires a guidewire to guide the stent to penetrate the thrombus. The effectiveness of thrombus retrieval during the traction process directly affects the thrombectomy efficiency. Thrombectomy catheter devices rely on negative pressure suction to remove thrombi. They come in two forms: manual syringe suction and dedicated suction pump systems. Their core limitation lies in the difficulty of precisely locating the suction catheter to the thrombus target, and the low success rate of the first thrombectomy for unstable thrombi, failing to effectively guarantee treatment outcomes. Mechanical thrombectomy devices break up thrombi through high-speed jet impact or rotating blade cutting, while simultaneously using strong suction to remove fragments. Although capable of handling stubborn thrombi, the fragmentation process is more invasive, easily generating a large number of thrombus fragments that can lead to secondary risks. Furthermore, the rigid core components have poor navigation flexibility within the blood vessel, increasing the difficulty of operation and the risk of vascular damage.

[0003] In summary, existing thrombectomy devices are insufficient to ensure both efficiency and success rate of thrombectomy, as well as safety. Summary of the Invention

[0004] This invention provides a thrombectomy device to address the shortcomings of existing thrombectomy devices in ensuring both thrombectomy efficiency and success rate, as well as safety.

[0005] This invention provides a thrombectomy device, comprising: catheter; The rotor is rotatably connected to the first end of the conduit. The stator is installed at the first end of the guide tube and is arranged around the rotor; The first shear fin group, at least one first shear fin group, when the number of first shear fin groups is at least two, the at least two first shear fin groups are spaced apart along the axial direction of the rotor; Each first shear fin group includes: Multiple first shear fins, with multiple first shear fins of each first shear fin group arranged at intervals along the circumferential direction of the rotor.

[0006] In addition, the thrombectomy device according to the present invention may also have the following additional technical features: In some embodiments of the present invention, it further includes: There are multiple second shear fins, which are spaced apart on the rotor.

[0007] In some embodiments of the present invention, each second shear fin is helical in shape.

[0008] In some embodiments of the present invention, the stator includes: Stator teeth, there are multiple stator teeth, multiple stator teeth are equally spaced along the circumference inside the guide tube, the number of stator teeth is an integer multiple, multiple stator teeth surround the outer circumference of the rotor.

[0009] In some embodiments of the present invention, the stator includes: The winding coil is installed at the first end of the conduit, and the rotor is located inside the winding coil.

[0010] In some embodiments of the present invention, the stator further includes: A connecting plate is located in the middle of the winding coil.

[0011] In some embodiments of the present invention, it further includes: The support is installed at the first end of the conduit, and the rotor is rotatably connected to the support.

[0012] In some embodiments of the present invention, the support includes: The first connector, one end of which is connected to the conduit; The first connecting pipe is connected to the other end of the first connecting member, and the rotor is rotatably sleeved on the first connecting pipe.

[0013] In some embodiments of the present invention, the cross-sectional shape of each first shear fin is trapezoidal; Each second shear fin has a trapezoidal cross-sectional shape.

[0014] In some embodiments of the present invention, there are two supports, which are respectively installed at both ends of the rotor. The rotor can rotate relative to both supports, and each support is connected to a conduit.

[0015] In summary, this application includes the following beneficial technical effects: By combining the separate stator and rotor with multiple first shear fins, the stator can drive the rotor to rotate, and the rotation of the rotor drives the rotation of the multiple first shear fins, causing the blood around the thrombus to rotate. Due to the shearing force of the rotating blood, the thrombus can be gradually compressed. The vortex formed by the rotation of the first shear fins and the flow of blood draw the compressed thrombus into the catheter, thereby achieving thrombus removal. This improves the efficiency of thrombectomy and increases the success rate of thrombectomy. Since a rigid core structure is not used to directly break the thrombus, the difficulty of operation and the risk of vascular injury are reduced, thus increasing safety. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A perspective view schematically illustrates a first structure of a thrombectomy device according to some embodiments of the present invention.

[0017] Figure 2 A perspective view schematically illustrates a second structure of a thrombectomy device according to some embodiments of the present invention.

[0018] Figure 3 A perspective view schematically illustrates a first structure of a thrombectomy device according to some embodiments of the present invention, without a catheter.

[0019] Figure 4 A perspective view schematically illustrates a first structure of a thrombectomy device according to some embodiments of the present invention, without the catheter and stent.

[0020] Figure 5 A perspective view of the rotor of a bolt remover according to some embodiments of the present invention is shown schematically.

[0021] Figure 6 A perspective view schematically illustrating a second configuration of a thrombectomy device according to some embodiments of the present invention, showing a winding coil mounted on a catheter.

[0022] Figure 7 A partially enlarged perspective view of a second configuration of a thrombectomy device according to some embodiments of the present invention, showing a winding coil mounted on a catheter, is schematically illustrated.

[0023] Figure 8 A perspective view schematically illustrates a first structure of a support for a thrombectomy device according to some embodiments of the present invention.

[0024] Figure 9 A perspective view schematically illustrates a second structure of the support for a thrombectomy device according to some embodiments of the present invention.

[0025] Figure label: 1. Conduit; 2. Rotor; 21. First shear fin; 22. Second shear fin; 23. Shear hole; 3. Stator tooth; 31. First electrode; 32. Second electrode; 33. Third electrode; 34. First conductor; 35. Second conductor; 36. Third conductor; 37. Connection point; 4. Support; 41. First connecting pipe; 42. First connector; 43. Second connecting pipe; 44. Second connector; 5. Winding coil; 6. Connecting plate. Detailed Implementation

[0026] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0027] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0028] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0029] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may also be rotated 90 degrees or in other orientations, and the spatial relative descriptors used in the text will be interpreted accordingly.

[0030] like Figures 1 to 9 As shown, according to an embodiment of the first aspect of the present invention, a thrombectomy device is provided, comprising a conduit 1, a rotor 2, a first shearing fin group, and a stator. The stator is mounted on a first end of the conduit 1, and the rotor 2 is rotatably connected to the first end of the conduit 1. The stator is arranged around the rotor 2. At least one first shearing fin group is provided on the rotor 2. The at least one first shearing fin group is spaced apart along the axial direction of the rotor 2. Each first shearing fin group includes a plurality of first shearing fins 21. The plurality of first shearing fins 21 of each first shearing fin group are spaced apart along the circumferential direction of the rotor 2.

[0031] In the above embodiments, it should be noted that each first shear fin 21 is made of an elastic material. Preferably, each first shear fin 21 is made of a shape memory material. When the thrombectomy device enters the blood vessel and is subjected to the squeezing resistance of the blood vessel wall, the first shear fin 21 can deform to pass through. When the thrombectomy device reaches the designated position and during the process of entering the blood vessel, if the squeezing resistance of the blood vessel wall on the first shear fin 21 disappears, the first shear fin 21 can restore its original shape. The stator and rotor 2 are connected in a cooperative manner.

[0032] The rotor 2 can be made of permanent magnet material, or it can be made of elastic material with shape memory function and then covered with flexible permanent magnet material on the outer periphery; the rotor 2 can also be made of elastic material with shape memory function in the middle and permanent magnet material at the ends.

[0033] Each first shear fin 21 can be connected to the rotor 2 by means of bonding, injection molding, or welding.

[0034] The conduit 1 is made of a metal braided mesh, and a flexible tube is wrapped around the metal braided mesh of the conduit 1.

[0035] It may also include a rotating shaft, which is arranged in a circular array and connected to multiple connecting ropes. Each connecting rope is connected to the metal braided mesh of the conduit 1 by binding or welding.

[0036] The number of first shear fins 21 in each first shear fin group can be 3, 4, 5, 6, 7, 8 or more, and the specific number can be set according to actual needs.

[0037] The number of the first shear fin group can be 1, 2, 3 or more, and the specific number can be set according to the actual situation.

[0038] Preferably, the number of the first shear fin group is 2.

[0039] Preferably, the number of first shear fins 21 in each first shear fin group is 3, 4, or 5.

[0040] Optionally, the number of first shear fins 21 in each first shear fin group can also be different, depending on the actual situation.

[0041] The surface of each first shear fin 21 facing away from the rotor 2 is parallel to the center of gravity axis of the rotor 2, and the central symmetry plane of each first shear fin 21 coincides with the center of gravity axis of the rotor 2.

[0042] It also includes shearing holes 23 and a negative pressure suction device. Multiple shearing holes 23 are spaced apart on the side wall of the rotor 2 to increase the shearing force of the rotor 2. The second end of the conduit 1 is connected to a negative pressure suction device. The negative pressure suction device can be an existing negative pressure suction device. The specific structure and working principle will not be discussed in detail here.

[0043] The working principle of this thrombectomy device is as follows: When a thrombectomy is required, a guidewire is first delivered through a blood vessel to the thrombus area to form a guiding path. Then, according to the guiding path of the guidewire, the catheter 1 is moved to guide the thrombectomy device to the thrombus area. The stator is energized to form an electric field that drives the rotor 2 to rotate. The rotation of the rotor 2 and the rotation of the first shear fin 21, combined with the setting of the shearing hole 23, can generate shearing force on the blood in the blood vessel, causing the blood to rotate. The shearing force of the rotating blood is used to gradually compress the thrombus. The rotation of the first shear fin 21 causes the blood to rotate, and the eddy current formed by the blood rotation, combined with the suction force given by the negative pressure suction device, draws the compressed thrombus into the catheter 1. After the thrombectomy device is withdrawn, the spray catheter 1 is placed in the thrombus area to spray platelet aggregation inhibitory drugs to prevent the risk of re-embolism. The thrombectomy is then completed.

[0044] The technical effects achieved by the above embodiments are as follows: By combining the separate stator and rotor 2 with the arrangement of multiple first shear fins 21, the stator can drive the rotor 2 to rotate, and the rotation of the rotor 2 drives the rotation of multiple first shear fins 21, causing the blood around the thrombus to rotate. Due to the shearing force of the rotating blood, the thrombus can be gradually compressed. The vortex formed by the rotation of the first shear fins 21 and the flow of blood will draw the compressed thrombus into the catheter 1, thereby realizing the removal of the thrombus. This improves the efficiency of thrombectomy and increases the success rate of thrombectomy. Since a rigid core structure is not used to directly break the thrombus, the difficulty of operation and the risk of vascular damage are reduced, and the safety is increased.

[0045] Optional, such as Figures 3 to 5 As shown, it also includes a plurality of second shear fins 22, which are spaced apart on the rotor 2.

[0046] In the above optional embodiments, it should be noted that, specifically, when the number of first shear fin groups is greater than or equal to two, a plurality of second shear fins 22 are provided between each two adjacent first shear fin groups. The plurality of second shear fins 22 between each two adjacent first shear fin groups are arranged at intervals along the circumferential direction of the rotor 2, or the plurality of second shear fins 22 are arranged in two columns at intervals along the axial direction of the rotor 2, and each column has at least one second shear fin 22. The at least one second shear fin 22 in each column is arranged at intervals along the circumferential direction of the rotor 2.

[0047] The number of second shear fins 22 between two adjacent first shear fin groups can be 3, 4, 5, 6, 7, 8 or more, and the specific number can be set according to actual needs.

[0048] Preferably, the number of second shear fins 22 between two adjacent first shear fin groups is 3, 4, or 5.

[0049] Preferably, the number of first shear fins 21 in each first shear fin group is 3, 4, or 5.

[0050] When there is only one first shear fin group, the first shear fin group can be set in the middle of the rotor 2. Multiple second shear fins 22 are provided on both sides of the first shear fin group. The multiple second shear fins 22 on each side of the first shear fin group are arranged at intervals along the circumference of the rotor 2.

[0051] The first shear fin group can be disposed at one end of the rotor 2, and a plurality of second shear fins 22 are disposed at the middle of one end of the rotor 2 and the other end. The plurality of second shear fins 22 disposed at the middle of the rotor 2 are all arranged at intervals along the circumferential direction of the rotor 2; the plurality of second shear fins 22 disposed at the other end of the rotor 2 are all arranged at intervals along the circumferential direction of the rotor 2.

[0052] Each second shear fin 22 can be connected to the rotor 2 by means of bonding, injection molding, or welding.

[0053] Each second shear fin 22 is made of an elastic material. Preferably, each second shear fin 22 is made of a shape memory material. When the thrombectomy device enters the blood vessel and is subjected to the squeezing resistance of the blood vessel wall, the second shear fin 22 can deform to pass through. When the thrombectomy device reaches the designated position and during the process of entering the blood vessel, if the squeezing resistance of the blood vessel wall on the second shear fin 22 disappears, the second shear fin 22 can return to its original shape.

[0054] Each second shear fin 22 is tilted relative to the first shear fin 21.

[0055] The beneficial effects of the above optional embodiments are as follows: by using multiple second shear fins 22, each of which is inclined relative to the first shear fin 21, and in conjunction with the arrangement of the first shear fin 21, local shear force can be further generated to increase the shearing effect of the thrombus, increase the degree of thrombus compression, and further increase the efficiency and success rate of thrombectomy.

[0056] Optional, such as Figures 3 to 5 As shown, each of the second shear fins 22 is spiral in shape.

[0057] In the above optional embodiments, it should be noted that one of the two adjacent second shear fins 22 is spiraled clockwise, and the other second shear fin 22 is also spiraled clockwise.

[0058] In two adjacent rows of second shear fins 22 along the axial direction of rotor 2, one row of second shear fins 22 spirals clockwise and the other row of second shear fins 22 spirals counterclockwise.

[0059] The advantages of the above optional embodiments are as follows: by setting the spiral-shaped second shear fin 22, the shear force can be further optimized, the local shear stress during deformation in the path into the blood vessel can be dispersed, stress concentration can be avoided to prevent damage, and the force required for the initial rotation of the rotor 2 can be reduced, thereby indirectly reducing energy consumption.

[0060] Optional, such as Figure 1 and Figure 3As shown, the stator includes multiple stator teeth 3, which are equally spaced along the circumferential direction inside the guide tube 1. The number of stator teeth 3 is an integer multiple of 3, and the rotor 2 is located between the multiple stator teeth 3.

[0061] In the above optional embodiments, it should be noted that the multiple stator teeth 3 are at least one first electrode 31, at least one second electrode 32, and at least one third electrode 33. The number of first electrodes 31, second electrodes 32, and third electrodes 33 are the same. The multiple stator teeth 3 are arranged alternately in the order of first electrode 31, second electrode 32, third electrode 33, and first electrode 31. The multiple stator teeth 3 are evenly distributed along the circumferential direction at a degree of 360 degrees. Among them, the first electrode 31 is the A-phase electrode, the second electrode 32 is the B-phase electrode, and the third electrode 33 is the C-phase electrode.

[0062] It also includes electrical wires, which are braided on a metal braided mesh in conduit 1, with insulating and waterproof material between the electrical wires and the metal braided mesh.

[0063] Preferably, the number of stator teeth 3 can be 6, 9, 12, 15, 18, 24 or more, and the specific number can be set according to actual needs.

[0064] It also includes a first conductor 34, a second conductor 35, a third conductor 36, and a connection point 37. The first conductor 34 is wound around multiple first electrodes 31 in sequence and then extends to the connection point 37. The second conductor 35 is wound around multiple second electrodes 32 in sequence and then extends to the connection point 37. The third conductor 36 is wound around multiple third electrodes 33 in sequence and then extends to the connection point 37. The connection point 37 is located on the side wall of the conduit 1 and is used for connecting the electrical wires on the conduit 1. Each stator tooth 3 is coated with an insulating and waterproof material.

[0065] Each stator tooth 3 can be connected to the guide tube 1 by means of bonding, welding or injection molding.

[0066] The advantages of the above optional embodiments are as follows: by directly connecting multiple stator teeth 3 to the catheter 1, the stator is a split structure, which allows the stator to have certain deformation conditions according to the deformation of the catheter 1, thereby increasing the convenience of the thrombectomy device entering the blood vessel and increasing the success rate of the thrombectomy surgery.

[0067] Optional, such as Figure 2 , Figure 6 and Figure 7 As shown, the stator includes a winding coil 5, which is mounted at the first end of the conduit 1, and the rotor 2 is located inside the winding coil 5.

[0068] In the above optional embodiments, it should be noted that the winding coil 5 is coated with an insulating and waterproof material, and the winding coil 5 is connected to the conductor for power supply; the winding coil 5 can be made of shape memory alloy or high elastic metal material such as beryllium bronze or elastic copper alloy; the outer periphery of the winding coil 5 is in contact with the conduit 1, and the winding coil 5 and the conduit 1 are connected by welding, bonding or winding on the metal braided mesh of the conduit 1.

[0069] The winding coil 5 can also be made of ordinary conductive metal, but an elastic constraint layer such as a fluororubber sleeve is provided on the winding coil 5 so that when the thrombectomy device enters the blood vessel, it can be deformed simply by deforming the winding coil 5, thus reducing the difficulty of the operation.

[0070] The advantages of the above optional embodiments are: by setting the winding coil 5, the stator can have a certain deformation ability, thereby increasing the convenience of the thrombectomy device entering the blood vessel and increasing the success rate of the thrombectomy surgery.

[0071] Optional, such as Figure 6 and Figure 7 As shown, the stator also includes a connecting plate 6, which is located in the middle of the winding coil 5.

[0072] In the above optional embodiments, it should be noted that the connecting plate 6 can be made of an elastic material with shape memory function; the connecting plate 6 is connected to the conduit 1 by means of bonding or welding around its perimeter.

[0073] The advantages of the above optional embodiments are: the connection between the winding coil 5 and the conduit 1 is increased by the setting of the connecting plate 6, while the difficulty of restoring the winding coil 5 to its original state after deformation is relatively reduced.

[0074] Optional, such as Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, it also includes a support 4, which is installed at the first end of the conduit 1, and the rotor 2 is rotatably connected to the support 4.

[0075] In the above optional embodiments, it should be noted that the stent 4 can be wound and connected to the metal braided mesh of the conduit 1, or it can be connected by bonding or welding to the metal braided mesh.

[0076] Optional, such as Figure 8 As shown, the bracket 4 includes a first connecting pipe 41 and a first connecting member 42. One end of the first connecting member 42 is connected to the conduit 1, and the other end of the first connecting pipe 41 is connected to the first connecting member 42. The rotor 2 is rotatably sleeved on the first connecting pipe 41.

[0077] In the above optional embodiments, it should be noted that the cross-sectional shape of the first connecting tube 41 is annular, and multiple first connecting members 42 are connected to both ends of the first connecting tube 41. The multiple first connecting members 42 at each end of the first connecting tube 41 are arranged at equal intervals in the circumferential direction of the first connecting tube 41. Each first connecting member 42 is made of flexible rope or shape memory material. The first connecting tube 41 is made of shape memory material or elastic material. When the thrombectomy device enters the blood vessel and is subjected to the squeezing resistance of the blood vessel wall, the first connecting tube 41 can deform to achieve passage. The first connecting members 42 at both ends of the first connecting tube 41 can effectively limit the axial displacement of the rotor 2.

[0078] The advantages of the above optional embodiments are that the arrangement of the first connecting pipe 41 and the first connecting member 42 can increase the reliability and stability of the rotor 2 rotation while limiting the axial displacement of the rotor 2.

[0079] Optional, such as Figures 3 to 5 As shown, the cross-sectional shape of each first shear fin 21 and the cross-sectional shape of each second shear fin 22 are trapezoidal.

[0080] In the above optional embodiments, it should be noted that the cross-sectional shape of each first shear fin 21 and the cross-sectional shape of each second shear fin 22 are both isosceles trapezoids.

[0081] The beneficial effects of the above optional embodiments are as follows: by setting the cross-sectional shape of each first shear fin 21 and the cross-sectional shape of each second shear fin 22 to be trapezoidal, the area of ​​the cross-section in contact with the rotor 2 can be increased, while the resistance experienced by the rotor 2 during rotation is reduced, thereby increasing the reliability of the rotor 2 rotation operation.

[0082] Optional, such as Figure 9 As shown, there are two supports 4, which are respectively installed at both ends of the rotor 2. The rotor 2 can rotate relative to both supports 4, and each support 4 is connected to the conduit 1.

[0083] In the above optional embodiments, it should be noted that each stent 4 includes a second connecting tube 43 and a second connecting member 44. Each second connecting tube 43 has multiple second connecting members 44 connected to one end away from the rotor 2. The multiple second connecting members 44 are arranged at equal intervals in the circumferential direction of the second connecting tube 43. Each second connecting member 44 is made of flexible rope or shape memory material. The second connecting tube 43 is made of shape memory material or elastic material. When the thrombectomy device enters the blood vessel and is subjected to the squeezing resistance of the blood vessel wall, the second connecting tube 43 can deform to pass smoothly. Each second connecting tube 43 is rotatably connected to the rotor 2. The second connecting tube 43 can also be made of rigid metal material, but in this case, the length of the second connecting tube 43 is smaller and needs to be less than one-fifth of the length of the rotor.

[0084] The advantages of the above optional embodiments are as follows: by setting two stents 4, the length of the stents 4 can be set to be shorter, which increases the convenience of the thrombectomy device entering the blood vessel, thereby indirectly increasing the success rate of the operation and the efficiency of thrombectomy.

[0085] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A thrombectomy device, characterized in that, include: Catheter (1); Rotor (2), which is rotatably connected to the first end of the conduit (1); A stator, which is mounted at the first end of the conduit (1) and is arranged around the rotor (2); A first shear fin group, at least one of the first shear fin groups; when the number of the first shear fin groups is at least two, the at least two first shear fin groups are spaced apart along the axial direction of the rotor (2); Each of the first shear fin groups includes: Multiple first shear fins (21), with multiple first shear fins (21) of each first shear fin group arranged at intervals along the circumferential direction of the rotor (2).

2. The thrombectomy device according to claim 1, characterized in that, Also includes: Second shear fins (22), there are multiple second shear fins (22), and multiple second shear fins (22) are arranged at intervals on the rotor (2).

3. The thrombectomy device according to claim 2, characterized in that, Each of the second shear fins (22) is spiral in shape.

4. The thrombectomy device according to claim 1, characterized in that, The stator includes: Stator teeth (3), there are multiple stator teeth (3), the multiple stator teeth (3) are equally spaced along the circumferential direction in the guide tube (1), the number of stator teeth (3) is an integer multiple of 3, and the multiple stator teeth (3) surround the outer periphery of the rotor (2).

5. The thrombectomy device according to any one of claims 1 to 3, characterized in that, The stator includes: The winding coil (5) is installed at the first end of the conduit (1), and the rotor (2) is located inside the winding coil (5).

6. The thrombectomy device according to claim 5, characterized in that, The stator also includes: A connecting plate (6) is disposed in the middle of the winding coil (5).

7. The thrombectomy device according to claim 1, characterized in that, Also includes: The bracket (4) is installed at the first end of the conduit (1), and the rotor (2) is rotatably connected to the bracket (4).

8. The thrombectomy device according to claim 7, characterized in that, The support (4) includes: A first connector (42) is connected at one end to the conduit (1); The first connecting pipe (41) is connected to the other end of the first connecting piece (42), and the rotor (2) is rotatably sleeved on the first connecting pipe (41).

9. The thrombectomy device according to claim 2, characterized in that, The cross-sectional shape of each of the first shear fins (21) is trapezoidal; Each of the second shear fins (22) has a trapezoidal cross-sectional shape.

10. The thrombectomy device according to claim 7, characterized in that, There are two supports (4), and the two supports (4) are respectively installed at both ends of the rotor (2). The rotor (2) can rotate relative to the two supports (4). Each support (4) is connected to the conduit (1).

Images