A resection device

Abstract

This invention discloses a resection device, relating to the field of medical devices, comprising a handle and a cutting assembly connected to the handle for resection of intravascular emboli. The cutting assembly includes a torque shaft and a cutting element disposed distal to the torque shaft. The handle contains a drive mechanism and a transmission mechanism connecting the drive mechanism and the torque shaft. The drive mechanism drives the torque shaft to rotate via the transmission mechanism, and the transmission mechanism is adjustable in the direction of rotation of the torque shaft. This resection device can change the overall rotation direction of the torque shaft, enabling timely clearing of blockages in the cutting assembly and preventing distal embolism caused by plaque or thrombus buildup due to failure to drain from the blood vessel in time.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a resection device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Interventional therapy is a rapidly developing emerging discipline that integrates imaging diagnosis and clinical treatment. It has now become one of the three pillars of clinical medicine, alongside traditional internal medicine and surgery. The peripheral plaque resection system primarily targets stenosis or occlusion of the femoral, popliteal, and below-knee arteries. Interventional therapy offers advantages such as being minimally invasive, simple to operate, having definite efficacy, and being repeatable, making it a promising direction for the diagnosis and treatment of vascular diseases. As an instrument used in interventional procedures, the peripheral plaque resection system can rapidly reduce local thrombus burden and decrease the need for balloon dilation. Its basic principle is to use a rotating blade to remove emboli, such as plaques or thrombi, from the blood vessel and deliver them out of the body.

[0004] In clinical practice, doctors can choose to use a rotary cutting catheter to treat peripheral vascular lesions based on the patient's condition. During the cutting process, as plaque is continuously expelled along the catheter towards the handle, plaque or thrombus may become lodged in the catheter. If plaque or thrombus becomes lodged inside the catheter, it will affect the efficiency of the procedure. Furthermore, if plaque or thrombus cannot be expelled from the catheter in a timely manner, there is a high probability that the plaque or thrombus excised from the catheter tip will cause distal embolism due to not being promptly removed from the blood vessel, endangering the patient's life. Summary of the Invention

[0005] Based on this, the present invention proposes a resection device that can solve the problem of thrombi or plaques getting stuck and unable to be expelled.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The present invention provides a resection device, including a handle and a cutting assembly connected to the handle for resection of intravascular emboli, wherein the cutting assembly includes a torque shaft and a cutting element disposed at the distal end of the torque shaft; the handle is provided with a drive mechanism and a transmission mechanism connecting the drive mechanism and the torque shaft, the drive mechanism drives the torque shaft to rotate through the transmission mechanism, and the transmission mechanism can adjust the rotation direction of the torque shaft.

[0008] The resection device of the present invention can change the rotation direction of the entire torque shaft, avoiding the internal blockage of the cutting component that could cause plaque or thrombus to cause distal embolism due to failure to drain the blood vessels in time, thus improving the safety of the operation; in addition, the resection device can continue to be used after unblocking without replacement, so the resection device of the present invention can also improve the efficiency of the operation.

[0009] In some embodiments of the cutting device of the present invention, the transmission mechanism includes an adjusting component for adjusting the rotation direction of the torque shaft, and the driving mechanism includes a driving gear connected to the torque shaft. The driving gear is in transmission engagement with the adjusting component to drive the torque shaft to rotate the cutting element.

[0010] In some embodiments of the cutting device of the present invention, the handle includes a first housing for assembling the drive mechanism and the transmission mechanism, the transmission mechanism further includes a speed regulating component connected to the drive mechanism and the steering component, the steering component engaging with the speed regulating component to form different transmission ratios, thereby adjusting the rotational speed of the torque shaft.

[0011] In some embodiments of the resection device of the present invention, the driving mechanism includes a support platform, a drive motor disposed on the support platform, and a support assembly for adjusting the position of the drive motor. The drive motor is connected to the speed regulating assembly, and the support assembly controls the transmission state of the speed regulating assembly by adjusting the position of the drive motor.

[0012] In some embodiments of the cutting device of the present invention, the speed regulating component includes a drive shaft connected to the output end of the drive motor and a first transmission gear and a second transmission gear spaced apart on the drive shaft, wherein one of the first transmission gear and the second transmission gear is adapted to the steering component to form a different transmission ratio.

[0013] In some embodiments of the resection device of the present invention, the support assembly is movably connected to the handle; a slide groove is provided on the first housing, the support assembly includes a first control lever slidably connected to the slide groove, the first control lever is used to drive the drive motor to move, and a locking assembly is provided on the handle, the locking assembly is used to fix the first control lever at a specific position in the slide groove.

[0014] In some embodiments of the cutting device of the present invention, the locking assembly includes a first locking key and a second locking key disposed on the handle. The first locking key and the second locking key are respectively located at both ends of the slide groove. When the first control lever is fixed by the first locking key, the first control lever is located at one end of the slide groove. When the first control lever is fixed by the second locking key, the first control lever is located at the other end of the slide groove.

[0015] In some embodiments of the cutting device of the present invention, the directional assembly includes a connecting rod and a connecting gear and a steering gear assembly disposed on the connecting rod and adapted to the speed regulating assembly. The connecting gear is rotatably connected to the connecting rod via a connecting bearing. The transmission direction of the connecting gear is opposite to that of the steering gear assembly. The handle also includes a stop assembly for controlling the movement state of the connecting rod.

[0016] In some embodiments of the cutting device of the present invention, the stop assembly includes a limiting seat disposed in the handle, a limiting hole disposed in the limiting seat, and a second control lever passing through the limiting hole. One end of the second control lever is disposed on the outside of the handle, and the other end of the second control lever is connected to the connecting rod to drive the connecting rod to move so as to drive the connecting gear and the steering gear assembly to move, thereby adjusting the cooperation relationship between the steering assembly and the speed regulating assembly.

[0017] In some embodiments of the cutting device of the present invention, the stop assembly further includes a first limiting block and a second limiting block disposed on the second control lever, and a locking key for locking the second control lever is movably connected to the handle. The first limiting block and the second limiting block cooperate with the locking key to restrict the movement of the second control lever. A guide hole for insertion into the connecting rod is provided in the handle, and a fixing groove is provided axially in the guide hole. A fixing key adapted to the fixing groove is provided on the connecting rod.

[0018] In some embodiments of the cutting device of the present invention, the steering gear assembly includes a flange fixedly connected to the connecting rod and a first steering gear and a second steering gear rotatably connected to the flange, wherein the first steering gear and the second steering gear are connected to the speed regulating assembly and the drive gear respectively after meshing.

[0019] In some embodiments of the cutting device of the present invention, the cutting assembly further includes an outer tube and a conveying threaded portion, the outer tube being connected to the handle, the outer tube being sleeved on the outside of the torque shaft, the conveying threaded portion being disposed on the torque shaft, and a conveying cavity being formed between the outer tube and the torque shaft. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the cutting device in Embodiment 1 of the present invention;

[0021] Figure 2 This is a partial structural diagram of the distal end of the cutting device in Embodiment 1 of the present invention;

[0022] Figure 3 for Figure 1 Enlarged view of the proximal end A of the resection device.

[0023] Figure 4 for Figure 1 A BB-direction sectional view of the cutting device in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of the cutting component in Embodiment 1 of the present invention when it does not penetrate the thrombus plaque;

[0025] Figure 6 This is a schematic diagram of the structure of the cutting component passing through the thrombus plaque and the balloon being inflated in Embodiment 1 of the present invention;

[0026] Figure 7 The balloon in Embodiment 1 of the present invention is spherical in its inflated state;

[0027] Figure 8 The balloon in Embodiment 1 of the present invention has a protrusion when inflated;

[0028] Figure 9 This is a schematic diagram of the resection device with a suction component in Embodiment 2 of the present invention;

[0029] Figure 10 This is a schematic diagram of the suction assembly in Embodiment 2 of the present invention;

[0030] Figure 11 for Figure 9 A magnified view of a portion of the resection device at point C proximal to the resection device.

[0031] Figure 12 for Figure 9 A sectional view of the cutting device in the DD direction;

[0032] Figure 13 This is a schematic diagram of the structure of the cutting component of the resection device with a suction component in Embodiment 2 of the present invention when it does not penetrate the thrombus plaque;

[0033] Figure 14 This is a schematic diagram of the structure of the cutting component of the resection device with a suction component in Embodiment 2 of the present invention when it passes through the thrombus plaque and the balloon is inflated;

[0034] Figure 15 This is a schematic diagram of the overall structure of the cutting device in Embodiment 3 of the present invention;

[0035] Figure 16 This is a partial structural diagram of the distal end of the cutting device in Embodiment 3 of the present invention;

[0036] Figure 17 for Figure 15 A magnified view of a portion of the resection device at point E proximal to the thorax.

[0037] Figure 18 for Figure 15 A cross-sectional view of the cutting device in the FF direction;

[0038] Figure 19 This is a schematic diagram of the structure of the cutting component in Embodiment 3 of the present invention when it does not penetrate the thrombus plaque;

[0039] Figure 20 This is a schematic diagram of the structure of the cutting component passing through the thrombus plaque and the protective net being in an expanded state in Embodiment 3 of the present invention;

[0040] Figure 21 This is a schematic diagram of the overall structure of the resection device in Embodiment 4 of the present invention;

[0041] Figure 22 This is a partial structural diagram of the distal end of the cutting device in Embodiment 4 of the present invention;

[0042] Figure 23 for Figure 21 A magnified view of a portion of the resection device at point G proximal to the resection device.

[0043] Figure 24 for Figure 21 HH direction cross-sectional view of the cutting device in the middle;

[0044] Figure 25 A schematic diagram of the structure of the cutting component in Embodiment 4 of the present invention when it does not penetrate the thrombus plaque;

[0045] Figure 26 A schematic diagram of the structure of the cutting component passing through the thrombus plaque and the protective net being in an expanded state in Embodiment 4 of the present invention;

[0046] Figure 27 This is a schematic diagram of the structure of the protective netting in Embodiment 4 of the present invention when a film is provided;

[0047] Figure 28 This is a schematic diagram of the outer tube and handle of the cutting device of the present invention;

[0048] Figure 29 This is a schematic diagram of the internal structure of the resection device of the present invention;

[0049] Figure 30 This is an assembly diagram of the bearing assembly of the cutting device of the present invention;

[0050] Figure 31 This is a schematic diagram of the transmission mechanism of the cutting device in Embodiment 5 of the present invention;

[0051] Figure 32 This is an embodiment of the present invention in which the cutting device is driven by a first transmission ratio in Embodiment 5;

[0052] Figure 33 This is an embodiment of the present invention in which the cutting device is driven by a second transmission ratio in Embodiment 5;

[0053] Figure 34 for Figure 33 A magnified view of a section at point K;

[0054] Figure 35 Embodiment 5 of the present invention describes an implementation method for adjusting the rotation direction of the torque shaft using a cutting device;

[0055] Figure 36 A schematic diagram of the structure of the first and second locking keys in Embodiment 5 of the present invention;

[0056] Figure 37 A schematic diagram of the locking key in Embodiment 5 of the present invention.

[0057] The attached figures are labeled as follows:

[0058] 100. Resection device; 110. Cutting assembly; 111. Torque shaft; 112. Cutting element; 113. Central cavity; 114. Delivery spiral section; 120. Catheter; 121. Guide head; 122. Filling cavity; 124. Guide wire cavity; 125. Filling port; 130. Balloon; 131. Protrusion; 132. Internal imaging element; 140. Aspiration assembly; 141. Aspiration cavity; 142. Aspiration port; 143. Aspiration imaging element; 150. Outer tube; 151. Delivery cavity; 160. Thrombus removal element; 200. Anchoring assembly; 210. Push tube 220. Inner tube; 221. First inner cavity; 230. Protective net; 231. Mesh; 240. End imaging element; 250. Cover; 300. Handle; 310. Base; 320. Bearing assembly; 321. Bearing; 322. Bearing housing; 342. Filling seat; 343. Aspiration seat; 344. Guide wire seat; 351. Connector; 352. Filling connector; 353. Aspiration connector; 354. Guide wire connector; 410. Push handle; 420. Slider; 500. Thrombus tissue; 600. Transmission mechanism; 610. Speed ​​control assembly; 611. Main... 612. Drive shaft; 613. First transmission gear; 614. Second transmission gear; 625. Adjustment assembly; 626. Connecting rod; 621. Fixing key; 627. Connecting gear; 628. Connecting bearing; 629. Steering gear assembly; 620. First steering gear; 621. Second steering gear; 621. Flange; 621. First steering shaft; 621. Second steering shaft; 622. Second control lever; 630. Drive gear; 700. Drive mechanism; 710. Drive motor; 721. Support platform; 722. First position; 7 22. Second position; 730. Support assembly; 731. First fixing plate; 732. Second fixing plate; 733. Elastic element; 734. Slide rail; 735. Guide rod; 736. First control lever; 737. Slide groove; 740. First housing; 750. Engaging assembly; 751. First locking key; 752. Second locking key; 760. Stop assembly; 761. Guide hole; 762. Fixing groove; 763. Limit seat; 764. Limit hole; 765. First limit block; 766. Second limit block; 767. Second control lever; 770. Locking key. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this disclosure and to fully convey the scope of this disclosure to those skilled in the art.

[0060] 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 “described” as used herein may also include 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.

[0061] 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.

[0062] For ease of description, spatial relative terms can 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, it would be described as "below other elements or features."

[0063] Alternatively, a component "below other components or features" will subsequently be oriented "above other components or features".

[0064] Or "above other elements or features". Therefore, the example term "below" can include both above and below orientations. The device may also be oriented (rotated 90 degrees or in other directions) and the blank spaces used in the text...

[0065] The relative relation descriptors are interpreted accordingly.

[0066] Additionally, it should be noted that in the field of interventional medical devices, the end of a medical device implanted in the human or animal body, or the delivery system that delivers the medical device, that is closer to the operator is generally referred to as the "proximal end."

[0067] The term "proximal end" refers to the end furthest from the operator, and based on this principle, the "proximal end" and "distal end" of any component of a medical device or delivery system are defined. "Axial direction" generally refers to the length of the medical device during delivery.

[0068] In terms of direction, "radial" generally refers to the direction of a medical device that is perpendicular to its "axial" direction, and the "axial" and "radial" directions of any component of a medical device are defined based on this principle.

[0069] Example 1

[0070] Embodiment 1 of the present invention provides a resection device 100, such as Figures 1 to 8 As shown, the resection device 5 100 is used to remove emboli, such as thrombi or plaque tissue, from blood vessels. The resection device 100 includes a handle 300 and a cutting assembly 110 and an anchoring assembly 200 connected to the handle 300. The anchoring assembly 200 includes a catheter 120 and a balloon 130. The cutting assembly 110 includes a torque shaft 111 and a cutting element 112 disposed at the distal end of the torque shaft 111. In this embodiment, the cutting element 112 is a helical blade. The torque shaft 111 is axially arranged...

[0071] There is a central cavity 113, and a catheter 120 passes through the central cavity 113 of the torque shaft 111, with the distal end of the catheter 120 extending out of the distal end of the torque shaft 111. The distal end of the catheter 120 is provided with a guide head 121, and the balloon 130 and the guide head 121 are connected.

[0072] The head 121 is connected, wherein the guide head 121 is tapered and the hardness of the guide head 121 is less than that of the catheter 120, so as to guide and buffer when the catheter 120 passes through the blood vessel.

[0073] Combination Figure 1 and Figure 4 As shown, the cutting device 100 also includes an outer tube 150 connected to the handle 300.

[0074] The tube 150 is sleeved on the outside of the torque shaft 111, forming a transmission cavity 151 between the outer tube 150 and the torque shaft 111. A portion of the torque shaft 111 is provided with a conveying spiral portion 114. In this embodiment, the conveying thread portion 114...

[0075] This includes a spiral spring wound and fixed to the torque shaft 111. The conveying spiral 114 follows the torque shaft 111.

[0076] The thrombus or plaque cut off by the cutting element 112 during rotation is transported through the delivery chamber along the outer tube 150.

[0077] 151 is conveyed towards the proximal end of the handle 300.

[0078] Please combine Figures 28 to 30 As shown, the handle 300 contains a bearing assembly 320 and a drive gear 630. The drive gear 630 engages with the proximal end of the torque shaft 111. Driven by a power source, the drive gear 630 rotates the torque shaft 111 and can also rotate the cutting element 112 to cut thrombi or plaques. The bearing assembly 320 includes a bearing 321 for connecting the drive gear 630. The bearing 321 is fixed to a bearing seat 322 and supports the drive gear 630 and the torque shaft 111. In this embodiment, a bearing 321 is provided at both ends of the drive gear 630.

[0079] The resection device 100 also includes a thrombus discharge member 160 disposed on the handle 300. The thrombus discharge member 160 is hollow and connected to the outer tube 150. The thrombus discharge member 160 is provided with a thrombus discharge outlet 161, which is connected to the external space of the handle 300. The thrombus discharge member 160 collects the thrombus or plaque conveyed by the conveying thread portion 114 and discharges it outside the handle 300 through the thrombus discharge outlet 161.

[0080] like Figures 2 to 4 As shown, the catheter 120 has an axially arranged filling cavity 122, and the distal end of the catheter 120 has an filling port 125 communicating with the filling cavity 122. The proximal end of the filling cavity 122 is used to connect to an filling device. A balloon 130 is located at the distal end of the catheter 120 and at least partially covers the catheter 120. The inner lumen of the balloon 130 is connected to the filling cavity 122 through the filling port 125. The filling device controls the inflation state of the balloon 130. When the proximal end of the filling cavity 122 of the catheter 120 is connected to an external filling device, an filling medium can be injected into the filling cavity 122 of the catheter 120, and the filling medium is eventually delivered to the lumen of the balloon 130, causing the balloon 130 to inflate. When the balloon 130 is inflated, its outer surface can adhere to the inner wall of the blood vessel.

[0081] As described above, the balloon 130 of the resection device 100 of the present invention is located at the distal end of the catheter 120, and the outer surface of the balloon 130 when it is inflated can fit against the inner wall of the blood vessel, thereby sealing the blood vessel. When the resection device 100 removes thrombi or plaques in the blood vessel, it can prevent the fragmented thrombi or plaque tissue generated during the resection process from escaping to the distal end of the blood vessel, thus avoiding secondary embolism of the blood vessel caused by the escaped thrombi, improving the success rate of the operation, and reducing the occurrence of complications.

[0082] Because surgical risks must be considered in clinical applications, doctors often conservatively perform a single plaque removal procedure during plaque excision to reduce the risk of vascular perforation. This results in residual plaque remaining after surgery, and the size of the lumen after excision is not ideal. Furthermore, since it is difficult for the cutting element 112 to maintain good alignment with the blood vessel, the risk of vascular injury remains relatively high. If the alignment between the cutting device 100 and the blood vessel is poor during the removal of thrombus plaque, vascular perforation can easily occur.

[0083] In this embodiment, the balloon 130 and the catheter 120 are coaxially arranged. When the torque shaft 111 rotates, it drives the cutting element 112 to rotate and cut off the thrombus or plaque in the blood vessel. If the cutting element 112 deflects unexpectedly during rotation, it may easily cut the side wall of the blood vessel; if the cutting assembly 100 pushes too fast during the removal process, it may easily cut the inner wall of the blood vessel on the opposite side when removing the thrombus at the bend of the blood vessel.

[0084] In this application, the central cavity 113 of the torque shaft 111 is used to insert the catheter 120, and the catheter 120 can extend beyond the distal end of the torque shaft 111. An inflatable balloon 130 is disposed at the distal end of the catheter 120. Since the balloon 130 circumferentially surrounds the catheter 120, and the catheter 120 and balloon 130 are coaxially arranged, the catheter 120 and the torque shaft 111 have better alignment under the anchoring effect of the balloon 120. In other words, after inflation, the balloon 130 adheres tightly to the inner wall of the blood vessel. Because the catheter 120 and balloon 130 are coaxially arranged, after the balloon 130 inflates and anchors within the blood vessel, the catheter 120 can be centered within the blood vessel under the anchoring effect of the balloon 130. When the torque shaft 111 is pushed along the catheter 120, it can prevent the cutting element 112 from accidentally deviating and cutting the blood vessel wall. This allows for better protection of blood vessels within the body. In clinical use, the cutting element 112 remains parallel to the blood vessel axis, reducing the risk of scratching or perforating blood vessels.

[0085] Furthermore, through the above design, the cutting assembly 100 can also be equipped with a cutting element 112 with a larger shaft diameter, thereby obtaining a larger lumen after resection. With the torque shaft 111 centrally anchored between the catheter 120 and the balloon 130, accidental deflection of the distal cutting element 112 can be avoided, thus providing greater safety for the cutting element 112 when removing thrombi or plaques. Compared to the prior art, this application, due to the excellent centering of the torque shaft 111, allows for the use of a cutting element 112 with a larger shaft diameter while ensuring surgical safety. The outer edge of the cutting element 112 is closer to the inner wall of the blood vessel, thereby enabling maximum removal of thrombi within the blood vessel or plaques attached to the inner wall of the blood vessel.

[0086] Based on the above analysis, firstly, the structural form of the resection device 100 of this application enables the removal of the vast majority of thrombus tissue from blood vessels, allowing for a more thorough removal of thrombi or plaques at the site of vascular lesions in a single cut. This reduces the amount of thrombi or plaques remaining on the inner wall of the blood vessel after surgery and enhances safety. Secondly, the balloon 130 located at the distal end of the resection device 100 acts as a suffocating vessel, fundamentally preventing the escape of excised thrombus fragments to the distal end. This further prevents escaped thrombus fragments and small plaque tissues from remaining in the body during the resection process, thus reducing the risk of embolism.

[0087] Specifically, such as Figure 2 and 3 As shown, a connector 351 is provided at the proximal end of the catheter 120. The connector 351 is used to connect to external devices, including filling devices, extraction devices, and vacuum devices. A filling medium can be injected into the balloon 130 to inflate it, or a vacuum can be evacuated from the balloon 130 to bring it into a contracted state.

[0088] The resection device 100 also includes an internal imaging element 132, which is disposed on the catheter 120 and covered by a balloon 130. The internal imaging element 132 can be an imaging ring or an imaging point. In this embodiment, the internal imaging element 132 is an imaging ring, which can be fixed to the catheter 120 by forging or bonding. The balloon 130 completely covers the internal imaging element 132, allowing the balloon 130 to be detected in external devices, and also allowing the morphology of the distal end of the catheter 120 to be detected.

[0089] In this embodiment, three internal imaging elements 140 are axially spaced at the distal end of the catheter 120. An internal imaging element 132 is provided at both the proximal and distal ends of the balloon 130 to display the positions of the proximal and distal ends of the balloon 130. Furthermore, an internal imaging element 132 is also provided in the middle of the balloon 130. Thus, the orientation of the distal end of the catheter 120 is indicated by the three spaced internal imaging elements 132, assisting the physician in identifying the orientation of the distal end of the catheter 120 and the degree of vascular curvature. If the internal imaging element 132 located in the middle is significantly offset, it indicates that the area where the balloon 130 at the distal end of the catheter 120 is anchored is a curved blood vessel. The physician should adjust the surgery promptly to prevent the cutting piece 112 of the resection device 100 from cutting the blood vessel wall when passing through the curved blood vessel area.

[0090] like Figure 5 and Figure 6 As shown, the application process of the resection device 100 of the present invention is as follows.

[0091] Combination Figure 5After the resection device 100 penetrates the blood vessel, it gradually approaches the thrombus 500 within the vessel. When the resection device 100 is a certain distance away from the thrombus 500, the control catheter 120 extends from the distal end of the torque shaft 111. At this time, the balloon 130 at the distal end of the catheter 120 is in a deflated state, making it easier to approach the lesion site in the blood vessel and pass through the thrombus 500. Furthermore, the guide head 121 at the distal end of the balloon 130 is tapered, which also facilitates the passage of the catheter 120 through the thrombus 500. Then, the catheter 120 is pushed forward to allow the balloon 130 to pass through the thrombus 500.

[0092] Combination Figure 6 After the balloon 130 passes through the thrombus 500 under the push of the catheter 120, an inflation medium is injected into the balloon 130 through the inflation device, causing the balloon 130 to inflate. The inflated balloon 130 can adhere to the inner wall of the blood vessel. Because the balloon 130 adheres to the inner wall of the blood vessel, the cutting element 112 of the cutting assembly 100 also has good alignment with the blood vessel, thereby reducing the risk of scratching the blood vessel and vascular perforation. At this time, the cutting assembly 110 is pushed forward, and the cutting element 112 is rotated by the torque shaft 111, so that the cutting element 112 removes the thrombus tissue during the forward movement.

[0093] In other embodiments, such as Figure 7 As shown, the balloon 130 at the distal end of the catheter 120 of the resection device 100, after inflation, has a spherical structure. The outer surface of the spherical balloon 130, during anchoring, can adhere to the inner wall of the blood vessel in a line-contact manner. The spherical structure of the balloon 130 is more suitable for anchoring to tortuous segments of blood vessels in the human body, better conforming to the vessel wall at the tortuous location, and increasing the pressure between the balloon 130 and the inner wall of the blood vessel. This increases the anchoring force at the tortuous location, making the resection device 100 safer when removing thrombi or plaques from tortuous blood vessels.

[0094] In other embodiments, such as Figure 8 As shown, multiple protrusions 131 are provided on the outer wall of the balloon 130, allowing the balloon 130 to fit against the inner wall of the blood vessel through the protrusions 131. Because the balloon 130 has protrusions 131 within its effective length range, the inflated balloon 130 can still maintain good contact with the blood vessel even when the blood vessel is in a tortuous state in the human body, and can better fit against the blood vessel wall. Furthermore, the balloon 130 with protrusions 131 has stronger anchoring properties, and can prevent the balloon 130 from shifting due to insufficient anchoring force under the pushing force of the catheter 120 during the pushing process of the outer tube 150.

[0095] Additionally, it should be noted that the resection device 100 provided by this invention is used to capture and remove thrombus tissue 500 from blood vessels, and the catheter 120, balloon 130, and guide head 121 therein are all biocompatible. In this embodiment, the catheter 120 or guide head 121 can be made of Pebax. The internal imaging element 132 is made of tantalum alloy or platinum-iridium alloy, and the balloon 130 can be made of any one of PEBAX, nylon, TPU, or silicone.

[0096] Example 2

[0097] Embodiment 2 of the present invention provides a resection device 100. The similarities between Embodiment 2 and Embodiment 1 will not be repeated. The differences between Embodiment 2 and Embodiment 1 are as follows: Figures 9 to 14 As shown, the resection device 100 also includes an aspiration assembly 140, which includes an aspiration chamber 141 and an aspiration port 142. The aspiration chamber 141 is arranged along the axial direction of the catheter 120, and the aspiration port 142 is located on the outer side of the catheter 120. The aspiration port 142 is connected to the aspiration chamber 141 and is located at the proximal end of the balloon 130. When the aspiration chamber 141 is connected to an external aspiration device, a negative pressure is formed in the aspiration chamber 141 under the action of the aspiration device, thereby drawing out the residual thrombus fragments in the blood vessel and preventing the residual thrombus fragments from causing embolism in downstream branch vessels.

[0098] Therefore, by providing an aspiration port 142 on the catheter 120 for aspirating small thrombi or plaques, this application ensures that if the cutting component 110 fails to remove all the cut thrombi from the blood vessel, the aspiration action of the aspiration port 142 can promptly remove the cut fragments of thrombus from the blood vessel, minimizing the possibility of the cut thrombus tissue 500 escaping to other locations within the blood vessel. This is especially important when there are many cut thrombus tissues 500 within the blood vessel, or when the thrombus plaques 500 are small, timely removal from the blood vessel is of great significance. Secondly, after timely removal of the cut thrombus tissue 500, the resection effect of the cutting component 112 on the thrombus tissue can also be checked, preventing the inability to effectively remove thrombi or plaques during the operation.

[0099] Among them, such as Figure 10 As shown, the aspiration assembly 140 also includes an aspiration imaging element 143 disposed near the aspiration port 142. The aspiration imaging element 143 is used to display the position of the aspiration port 142, thereby assisting the doctor in observation and operation.

[0100] like Figure 11 and Figure 12 As shown, the catheter 120 also includes a guidewire lumen 124 for inserting the guidewire. In clinical use, the guidewire is inserted into the guidewire lumen 124, and the guidewire establishes the path for the outer tube 150 of the resection device 100 to extend into the blood vessel.

[0101] In other embodiments, a guidewire may be inserted through the central cavity 113 of the torque shaft 111 to establish a path for the outer tube 150 of the resection device 100 to extend into the blood vessel. When the outer tube 150 is inserted into the designated location of the blood vessel along the path established by the guidewire, the guidewire is withdrawn, and then the catheter 120 is inserted into the central cavity 113 and exits through the torque shaft 111.

[0102] Combination Figure 13 and Figure 14 This illustration shows the application process of the resection device 100 with a suction port 142 in this embodiment. The resection device 100 is inserted into the lesion site of the blood vessel. The catheter 120 approaches the thrombus 500 but does not penetrate it. After the balloon 130 extends from the distal end of the outer tube 150 of the resection device 100, the guide head 121 at the distal end of the balloon 130 approaches the thrombus 500 in the blood vessel. At this time, the balloon 130 is in a deflating state, making it easier for the catheter 120 to approach and penetrate the thrombus 500 to reach its distal end. Subsequently, the catheter 120 is pushed to allow the balloon 130 to penetrate the thrombus 500.

[0103] Once the balloon 130 at the distal end of the catheter 120 passes through the thrombus 500, and the aspiration port 142 is located distal to the thrombus 500 as determined by the aspiration imaging element 143, the balloon 130 is inflated using an inflation device, allowing it to conform to the inner wall of the blood vessel. At this point, the cutting component 110 is advanced to remove the thrombus 500 from the blood vessel, and thrombus aspiration is performed simultaneously through the aspiration port 142. While the cutting component 110 removes the thrombus 500, the aspiration component 140 aspirates the fragmented thrombus, preventing the escape of the removed thrombus plaque, reducing the risk of distal vascular embolism, decreasing surgical complexity, and shortening the operation time.

[0104] The resection device 100 provided in this embodiment can prevent the thrombus plaque removed from the blood vessel by the cutting component 110 from escaping through the balloon 130, and capture the thrombus plaque that was not removed by the cutting component 110 and transported to the handle 300 through the suction component 140. The fragmented thrombus is discharged from the blood vessel through the suction chamber 141 under negative pressure, thereby reducing the risk of distal vascular embolism, reducing surgical complexity, and shortening surgical time.

[0105] The resection device 100 provided by the present invention, in clinical use, reduces the risk of scraping blood vessels and perforation because the cutting component 110 is kept parallel to the blood vessel axis. At the same time, it can remove plaque in diseased blood vessels multiple times, thereby obtaining a larger lumen.

[0106] like Figure 11As shown, the handle 300 is connected to the proximal end of the outer tube 150. In this embodiment, the connector 351 is a base 310 disposed at the proximal end of the handle 300, and the handle 300 is connected to an external device through the base 310. The base 310 includes an filling seat 342 that communicates with the proximal end of the filling cavity 122, and an filling connector 352 is disposed at the proximal end of the filling seat 342. The base 310 also includes a suction seat 343 that communicates with the proximal end of the suction cavity 141, and a suction connector 353 is disposed at the proximal end of the suction seat 343. The base 310 also includes a guide wire seat 344 that communicates with the proximal end of the guide wire cavity 124, and a guide wire connector 354 can be disposed at the proximal end of the guide wire seat 344. The filling connector 352, suction connector 353, and guide wire connector 354 are all used to connect to external devices.

[0107] The guidewire can be inserted into the distal end of the guidewire lumen 124 of the catheter 120 through the guidewire connector 354 of the guidewire seat 344; the filling connector 352 of the filling seat 342 can inject a medium into the filling lumen 122 of the catheter 120 to inflate the cavity of the balloon 130 connected to the filling lumen 122, and the cavity of the balloon 130 can also be emptied through the filling connector 352 of the filling seat 342; the thrombus tissue that has entered the aspiration lumen 141 of the catheter 120 can be removed from the body through the aspiration connector 353 of the aspiration seat 343.

[0108] Additionally, it should be noted that the resection device 100 provided by the present invention is used to capture and remove thrombus tissue 500 in blood vessels. The aspiration imaging element 143 is made of tantalum alloy or platinum-iridium alloy; the guidewire connector 354, filling connector 352, aspiration connector 353, and base 310 are made of any one of PC, ABS, and PP.

[0109] Example 3

[0110] Embodiment 3 of the present invention provides a cutting device 100. The similarities between Embodiment 3 and Embodiment 1 will not be repeated. The differences between Embodiment 3 and Embodiment 1 are as follows: Figures 15 to 20 As shown, the cutting device 100 includes a cutting assembly 110 and an anchoring assembly 200. The anchoring assembly 200 includes a push tube 210, an inner tube 220, and a protective net 230. The cutting assembly 110 includes a torque shaft 111 and a cutting element 114 disposed at the distal end of the torque shaft 111. The torque shaft 111 has a central cavity 113. The push tube 210 passes through the central cavity 113 and extends out of the distal end of the torque shaft 111. The inner tube 220 passes through the cavity of the push tube 210. The protective net 220 is woven from braided yarn with shape memory properties. The protective net 230 is connected to the inner tube 220, and the push tube 210 and the inner tube 220 can slide relative to each other axially to control the release or retraction of the protective net 230.

[0111] In this embodiment, the proximal end of the protective net 230 is connected to the distal end of the push tube 210, and the distal end of the protective net 230 is connected to the distal end of the inner tube 220. The protective net 230 is controlled to be in a contracted or expanded state by the axial relative movement of the inner tube 220 and the push tube 210, and the expanded protective net 230 can fit against the inner wall of the blood vessel.

[0112] As the inner tube 220 moves axially toward the distal end of the push tube 210, the protective net 230 is gradually stretched under the pulling force of the inner tube 220 and eventually adheres to the inner tube 220. At this time, the push tube 210 can be moved so that the anchoring assembly 200 is entirely housed within the central cavity 113 of the torque shaft 111. As the inner tube 220 moves axially toward the proximal end of the push tube 210, the pulling force of the inner tube 220 on the protective net 230 gradually decreases, and the protective net 230 unfolds under its own elastic restoring force and eventually adheres to the inner wall of the blood vessel.

[0113] At least a portion of the inner tube 220 extends out of the cavity of the push tube 210. The protective net 230 is fully covered by the inner tube 220 and is in a straight state. The inner tube 220 moves proximally relative to the push tube 210 to inflate the protective net 230. Because the protective net 230 is provided at the distal end of the resection device 100, it can be delivered when it is in a contracted state, and it can adhere to the inner wall of the blood vessel when it is in an inflated state, capturing the resected thrombus or plaque and preventing the resected thrombus or plaque from escaping distally.

[0114] Since the protective net 230 in this embodiment is formed by weaving yarn, the protective net 230 has mesh openings 231, combined with... Figure 20 Even if the protective net 230 expands and adheres to the blood vessel wall during the operation, blood flow can still pass through the mesh 231 of the protective net 230. However, the removed thrombus or plaque is trapped due to the obstruction of the protective net 230. Therefore, the resection device 100 in this embodiment can not only remove the thrombus or plaque, but also ensure timely replenishment of blood to the tissues distal to the thrombus tissue 500, thereby improving the safety of the operation.

[0115] like Figure 18 As shown, the inner tube 220 also has a first inner cavity 221, which is used to insert a guide wire. The guide wire can establish a path for the outer tube 150 of the resection device 100 to extend into the blood vessel. In other embodiments, the inner cavity for inserting the guide wire can also be located in the push tube 210 or the torque shaft 111.

[0116] like Figure 16 , Figure 19 and Figure 20As shown, the protective net 230 is also provided with end developing elements 240. The end developing elements 240 are provided on the protective net 230. At least one end developing element 240 is provided at both the proximal end and the distal end of the protective net 230. For example, two end developing elements 240 are provided at the proximal end of the protective net 230 and two end developing elements 240 are provided at the distal end of the protective net 230.

[0117] This application provides end imaging elements 240 at the proximal and distal ends of the protective net 230, thereby enabling the determination of the distance between the proximal and distal ends of the protective net 230 during the movement of the inner tube 220, and thus the determination of the unfolded state of the protective net 230, ensuring that the protective net 230 has been unfolded before the cutting assembly 110 removes the thrombus tissue 500.

[0118] In this embodiment, the end developing element 240 is a developing point fixedly installed on the protective net 230.

[0119] In specific implementation, such as Figure 19 and Figure 20 As shown, when the resection device 100 is inserted into the lesion site of the blood vessel, the protective net 230 of the resection device 100 has not yet penetrated the thrombus 500. At this time, the inner tube 220 moves to the distal end relative to the push tube 210 so that the protective net 230 is in a contracted state and adheres to the inner tube 220. Since the protective net 230 is located at the distal end of the resection device 100, it is easier to approach the lesion site in the blood vessel when the protective net 230 is in a contracted state. After the protective net 230 penetrates the thrombus 500, the inner tube 220 moves proximally relative to the push tube 210 so that the protective net 230 expands under its own elastic restoring force and adheres to the blood vessel wall. The expanded protective net 230 can adhere to the inner wall of the blood vessel. At this time, the cutting component 110 is pushed along the push tube 210 to control the cutting element 112 to remove the thrombus.

[0120] Through the above-described technical solution of this embodiment, since the protective net 230 can expand and conform to the inner wall of the blood vessel, the cutting component 110 located near the proximal end of the protective net 230 is well aligned with the blood vessel. This not only allows for the removal of thrombus plaques or thrombus tissue but also reduces the risk of damage to the blood vessel. Furthermore, since the protective net 230 is woven from shape-memory braided yarns, it has mesh openings 231 that allow blood flow, thus facilitating blood circulation during surgery.

[0121] In other embodiments, one end of the protective net 230 can be fixed to the inner tube 220 by welding, and the other end of the protective net 230 can be fixed to the push tube 210 by adhesive bonding or welding.

[0122] When the protective net 230 is provided with end developing elements 240, the material of the end developing elements 240 can be tantalum alloy or platinum-iridium alloy. Preferably, there are four end developing elements 240 provided on the protective net 230, located at the near end and far end of the protective net 230 respectively. Such a setting allows the position and specific status of the protective net 230 to be observed through external devices.

[0123] The materials of the push tube 210, inner tube 220 and protective net 230 should be biocompatible. For example, the material of the push tube 210 or inner tube 220 can be PEBAX or nylon, and the material of the protective net 230 can be stainless steel or nickel-titanium alloy.

[0124] Example 4

[0125] Embodiment 4 of the present invention provides a cutting device 100. The similarities between Embodiment 4 and Embodiment 3 will not be repeated here. The differences between Embodiment 4 and Embodiment 3 are as follows: Figures 21 to 27 The protective net 230 can also be located at the distal end of the inner tube 220. The inner tube 220 and the push tube 210 are slidably connected along the axial direction, so that the protective net 230 is contained within the push tube 210 or extends out of the push tube 210. When the protective net 230 extends out of the push tube 210, it unfolds under its own elastic restoring force, thereby conforming to the inner wall of the blood vessel.

[0126] When the protective net 230 is housed within the cavity of the push tube 210, it is in a straightened state. The push tube 210 moves proximally relative to the inner tube 220 to allow the protective net 230 to extend out of the cavity of the push tube 210 and become in an expanded state. In this embodiment, placing the straightened protective net 230 within the push tube 210 avoids damage to the protective net 230 due to misoperation. The push tube 210 is then axially moved proximally relative to the inner tube 220 until the straightened protective net 230 passes through the distal end of the thrombus 500 within the blood vessel. This causes the contracted protective net 230 to extend out of the push tube 210, and the protective net 230 returns to its expanded state, allowing it to conform to the inner wall of the blood vessel.

[0127] Combination Figure 23As shown, a push handle 410 and a slider 420 disposed on the push handle 410 can be provided at the proximal end of the handle 300. The push tube 210 and the inner tube 220 are respectively inserted through the push handle 410. The push tube 210 is fixed to the push handle 410, and the inner tube 220 extends out of the push tube 210 and is fixedly connected to the slider 420. The slider 420 is disposed in the push handle 410 and can move axially within the push handle 410. At the distal end of the resection device 100, by operating the slider 420 to move axially within the push handle 410, the inner tube 220 is driven to move axially relative to the push tube 210, thereby allowing the protective net 230 disposed at the distal end of the push tube 210 and the inner tube 220 to contract or expand. In this embodiment, by providing a push handle 410 at the proximal end of the handle 300, the doctor's operation is facilitated, and the surgical efficiency and success rate are improved.

[0128] In other embodiments, the push handle 410 is connected to the proximal end of the handle 300, the slider 420 is fixedly connected to the push tube 210, and the inner tube 220 is fixedly disposed inside the push handle 410. When the slider 420 is moved, the push tube 210 moves along with the slider 420. When the slider 420 is driven to move toward the proximal end of the push handle 410, the push tube 210 moves toward the proximal end relative to the inner tube 220. The protective net 230 disposed at the distal end of the inner tube 220 is gradually released from the push tube 210 and unfolds under its own elastic restoring force, and finally adheres to the wall.

[0129] In other embodiments, the cutting device 100 may not have a push handle 410, and the doctor may directly push or pull the inner tube 220 during surgery to cause the protective net 230 to contract or expand.

[0130] In other embodiments, such as Figure 27 As shown, a covering film 250 can also be installed on the protective net 230 when the protective net is in use.

[0131] When a covering film 250 is installed on the protective net 230, the covering film 250 can cover the mesh openings 231 on the protective net 230, thereby preventing fragmented thrombi smaller than the mesh openings 231 from passing through the mesh openings 231 and thus preventing branch vessel embolism.

[0132] Risk. Specifically, the membrane 250 may completely cover the protective netting 230, or the membrane 250 may partially cover the protective netting 230. When the membrane 250 partially covers the protective netting 230, the membrane 250 may be positioned at the near end or far end of the protective netting 230.

[0133] Combination Figure 24 It should be noted that the inner tube 220 used in the cutting device of the present invention can be either a hollow inner tube 220 or a solid inner tube 220. The purpose of setting the inner tube 220 is...

[0134] Therefore, one end of the protective net 230 is connected to the distal end of the inner tube 220, and the protective net 230 is adjusted to a contracted or expanded state by the axial relative movement of the inner tube 220 and the push tube 210. Thus, depending on the actual application requirements, an inner tube 220 with a first inner cavity 221 can be used, through which the guide wire passes.

[0135] Blood vessels; a thin guidewire can also replace the inner tube 220, with the distal end of the thin guidewire connected to one end of the protective net 5230 and inserted into the push tube 210. It can be moved axially relative to the push tube 210 to achieve...

[0136] The current protective netting 230 is in both its contracted and expanded states.

[0137] Example 5

[0138] Embodiment 5 of the present invention provides a cutting device 100. The similarities between Embodiment 5 and Embodiment 1 will not be repeated. The differences between Embodiment 5 and Embodiment 1 are as follows: Figures 31 to 37 As shown, cut

[0139] The device 100 includes a drive mechanism 700, a transmission mechanism 600, and a torque shaft 111 connected to the transmission mechanism 600. An outer tube 150 is sleeved on the outside of the torque shaft 111. The drive mechanism 700 is connected to the transmission mechanism 600 and provides power to the transmission mechanism 600. The drive mechanism 700 controls the rotational speed and direction of the torque shaft 111 through the transmission mechanism 600.

[0140] 5. In this invention, the outer tube 150 is sleeved on the outside of the torque shaft 111. After the cutting element 120, located at the distal end of the torque shaft 111, cuts the thrombus in the blood vessel, the cut thrombus is collected in the outer tube 150 and discharged from the body by the transport screw 114 through the rotation of the torque shaft 111. However, when a blockage occurs between the torque shaft 111 and the outer tube 150, it is difficult to discharge the thrombus from the outer tube 150. If the thrombus is not discharged in time, it can easily cause blockage of the transport cavity 151 in the outer tube 150, thereby causing the resection device 100 to malfunction and affecting the normal progress of the surgery. The resection device 100 provided by this invention can promptly clear the blockage between the torque shaft 111 and the outer tube 150 by changing the rotation speed and direction of the torque shaft 111, and promptly discharge the thrombus.

[0141] like Figure 31 and Figure 32As shown, the transmission mechanism 600 includes a speed regulating component 610, a direction adjusting component 620, and a drive gear 630. The speed regulating component 610 and the direction adjusting component 620 are in transmission cooperation and can form transmission ratios of different values. Therefore, the transmission mechanism 600 can transmit power at different transmission ratios. When the drive gear 630 is mounted on the torque shaft 111 of the cutting device 100, the transmission mechanism 600 transmits power to the drive gear 630 at different transmission ratios through the speed regulating component 610 and the direction adjusting component 620, thereby driving the torque that cooperates with the drive gear 630. Since shaft 111 rotates at different speeds, the drive mechanism 700 of the resection device 100 transmits power to the transmission mechanism 600. Through the transmission mechanism 600, different torques can be output to the torque shaft 111, causing the torque shaft 111 to rotate at different speeds. This allows the cutting element 120, located at the distal end of the torque shaft 111, to cut thrombi or plaques at different rotational speeds. The transmission mechanism 600 provided in this embodiment is connected to the resection device 100, achieving the technical effect that the cutting element 120 in the resection device 100 cuts thrombus tissue at different rotary cutting speeds.

[0142] The speed regulating component 610 includes a drive shaft 611, which is connected to the output shaft of the drive mechanism 700. A first transmission gear 612 and a second transmission gear 613 are arranged on different sections of the drive shaft 611. The first transmission gear 612 and the second transmission gear 613 can be configured with different numbers of teeth and different tooth diameters. The first transmission gear 612 and the second transmission gear 613 respectively mesh with the reversing component 620 to form different transmission ratios. For example, the first transmission gear 612 meshes with the reversing component 620 to form a first transmission ratio, and the second transmission gear 613 meshes with the reversing component 620 to form a second transmission ratio. Since the first transmission gear 612 and the second transmission gear 613 are spaced apart on the drive shaft 611, the switching of the engagement between the first transmission gear 612 and the second transmission gear 613 and the reversing component 620 can be achieved by moving the drive shaft 611.

[0143] The directional assembly 620 in the transmission mechanism includes a connecting rod 621, on which a connecting gear 622 and a connecting bearing 624 are disposed. The connecting gear 622 is rotatably connected to the connecting rod 621 via the connecting bearing 624. The connecting gear 622 simultaneously meshes with the first transmission gear 612 and the drive gear 630 connected to the torque shaft 111, or simultaneously meshes with the second transmission gear 613 and the drive gear 630 connected to the torque shaft 111, thereby driving the rotation of the torque shaft 111 and the cutting element 120.

[0144] The drive shaft 611 and the connecting rod 621 are arranged in parallel. The relative movement between the drive shaft 611 and the connecting rod 621 can realize the switching of the engagement between the first transmission gear 612 and the second transmission gear 613 on the drive shaft 611 and the connecting gear 622 on the connecting rod 621.

[0145] In this embodiment, the second transmission gear 613 mounted on the drive shaft 611 is a primary gear, and the first transmission gear 612 mounted on the drive shaft 611, the connecting gear 622 rotatably connected to the connecting rod 621, and the drive gear 630 cooperating with the torque shaft 111 are secondary gears. The size of the primary gear is smaller than that of the secondary gear. For example, the transmission ratio formed by the first transmission gear 612, the connecting gear 622, and the drive gear 630 is 1:1:1, and the transmission ratio formed by the second transmission gear 613, the connecting gear 622, and the drive gear 630 is 1.5:1:1 or 2:1:1.

[0146] During the removal of thrombi or plaques by the resection device 100, the thrombi or plaques are continuously discharged towards the handle 300 along the delivery chamber 151 in the outer tube 150 under the action of the delivery spiral 114. If the thrombi or plaques being removed simultaneously are hard or numerous, they are prone to getting stuck in the outer tube 150. Once the thrombi or plaques are stuck in the outer tube 150, it will affect the normal removal of the thrombi or plaques by the cutting element 112.

[0147] Therefore, in this embodiment, when a thrombus or plaque is stuck inside the outer tube 150 and affects the normal cutting of the cutting element 112, the torque of the torque shaft 111 can be adjusted by controlling the transmission mechanism 600, so that the conveying spiral part 114 can convey the thrombus or plaque with a greater torque, so that the thrombus or plaque stuck in the outer tube 150 can be conveyed into the handle 300. At the same time, the rotary cutting speed of the cutting element 112 is also adjusted, so that the cutting element 112 can adapt to the harder thrombus or plaque by changing the rotary cutting speed. When it is necessary to cut the thrombus or plaque at a lower cutting speed, a two-stage gear can be selected for driving, that is, the transmission ratio between the first transmission gear 612, the connecting gear 622 and the driving gear 630 is 1:1:1; when it is necessary to cut the thrombus tissue at a higher cutting speed, a first-stage gear and a second-stage gear can be selected for driving, that is, the transmission ratio between the second transmission gear 613, the connecting gear 622 and the driving gear 630 is 1.5:1:1 or 2:1:1. In this embodiment, spur gears are used for transmission.

[0148] In other embodiments, multiple gears with different transmission ratios can be arranged on the drive shaft 611 to form various different transmission ratios to drive the torque shaft 111 to rotate. Other gear structures can also be used for transmission, such as helical cylindrical gears, bevel gears, or herringbone gears, which can achieve smooth power transmission.

[0149] like Figure 31 As shown, a steering gear assembly 623 is provided on the connecting rod 621 in the steering assembly 620. The steering gear assembly 623 can be located at the shaft end of the connecting rod 621, or it can be located on a portion of the shaft of the connecting rod 621. This embodiment uses a method where the steering gear assembly 623 is located at the shaft end of the connecting rod 621.

[0150] Specifically, a flange 6233 is fixedly mounted on the shaft end of the connecting rod 621. A first steering shaft 6234 and a second steering shaft 6235 are rotatably connected to the flange 6233. A first steering gear 6231 and a second steering gear 6232 mesh with each other. The first steering gear 6231 and the second steering gear 6232 are rotatably connected to the flange 6233 via the first steering shaft 6234 and the second steering shaft 6235, respectively. The meshing first steering gear 6231 and the second steering gear 6232, as a whole, simultaneously mesh with a first transmission gear 612 mounted on the drive shaft 611 and a drive gear 630 cooperating with the torque shaft 111, or simultaneously mesh with a second transmission gear 613 mounted on the drive shaft 611 and a drive gear 630 cooperating with the torque shaft 111.

[0151] By engaging the first transmission gear 612, the steering gear assembly, and the drive gear 630, the drive gear 630 can be rotated in the opposite direction, which in turn can cause the torque shaft 111 connected to the drive gear 630 to rotate in the opposite direction.

[0152] The resection device 100 of the present invention can enable the torque shaft 111 to rotate at different speeds and can change the rotation direction of the torque shaft 111. When a thrombus or plaque is stuck in the outer tube 150, if the speed regulating component 610 cannot clear the outer tube 150 in time, the connecting rod 621 can be manipulated to control the connecting gear 622 to disengage from the first transmission gear 612 or the second transmission gear 613, and the direction adjusting component 620 is used as an intermediate transmission component to change the rotation direction of the torque shaft 111, thereby clearing the blocked part of the outer tube 150.

[0153] The directional component 620 of this application can be used in conjunction with the suction component 140 when changing the rotation direction of the torque shaft 111. Since the torque shaft 111 may push out the thrombus or plaque in the outer tube 150 from the distal end of the outer tube 150 when it rotates in the opposite direction, the thrombus or plaque discharged when the outer tube 150 is cleared by the suction component 140 is discharged out of the blood vessel through the suction port 142.

[0154] In this embodiment, when the orientation component 620 is used to change the selected mounting direction of the torque shaft 111, the orientation component 620 is driven by the first transmission gear 612. When the transmission is driven by the first transmission gear 612, the transmission mechanism 600 can obtain a large torque, which facilitates clearing the blockage in the cutting component 110.

[0155] Combination Figures 32 to 35 As shown, the drive mechanism 700 includes a first housing 740, within which a support platform 720 is provided. The support platform 720 has a first position 721 and a second position 722 for supporting the drive motor 710. Figure 32 The first position 721 of the drive motor 710 is shown, where the drive motor 710 is fixed to the support platform 720. In order to ensure that the drive motor 710 can be stably fixed in the first position 721, a support component 730 connected to the drive motor 710 is also provided.

[0156] The support assembly 730 includes a first fixing plate 731 and a second fixing plate 732 disposed opposite to each other, and an elastic element 733 disposed between the first fixing plate 731 and the second fixing plate 732. The first fixing plate 731 is connected to the drive motor 710, and the second fixing plate 732 is connected to the inner wall of the first housing 740. Under the elastic force of the elastic element 733, the first fixing plate 731 fixes the drive motor 710 to the first position 721 of the support platform 720, and the second fixing plate 732 presses against the inner wall of the first housing 740, so that the drive motor 710 can be stably fixed to the first position 721 of the support platform 720. The output shaft of the drive motor 710 is connected to the drive shaft 611 of the speed regulating assembly 610, thereby stably outputting power to drive the transmission mechanism 600. In this embodiment, the elastic element 733 is a spring.

[0157] Combination Figure 32 and Figure 33As shown, a slide rail 734 is provided between the first fixing plate 731 and the inner wall of the first housing 740. The slide rail 734 is fixed to the inner wall of the first housing 740, and the first fixing plate 731 is slidably connected to the slide rail 734. The support assembly 730 also includes a first control lever 736, which extends out of the first housing 740. A locking assembly 750 is provided on the handle 300, which includes a first locking key 751 and a second locking key 752. The first locking key 751 and the second locking key 752 are respectively disposed on the first housing 740 and are used to fix the first control lever 736. The first control lever 736 is locked and fixed with the first locking key 751 and the second locking key 752. Figure 36 As shown.

[0158] A slide groove 737 is provided on the first housing 740, and a first control lever 736 is disposed within the slide groove 737. A first locking key 751 and a second locking key 752 are respectively disposed at both ends of the slide groove 737. The first control lever 736 moves along the slide groove 737 to move the drive motor 710 between a first position 721 and a second position 722. Figure 33 The second position 722 of the drive motor 710 is shown, where the drive motor 710 is fixed to the support platform 720.

[0159] The output shaft of the drive motor 710 is connected to the drive shaft 611 in the speed regulating assembly 610. The first transmission gear 612, which is mounted on the drive shaft 611, meshes with the connecting gear 622, which is mounted on the connecting rod 621. The connecting gear 622 also meshes with the drive gear 630. The transmission ratio between the first transmission gear 612, the connecting gear 622, and the drive gear 630 is 1:1:1. The drive mechanism can stably output power to the transmission mechanism, ultimately driving the torque shaft 111 to rotate stably. When it is necessary to increase the speed of the torque shaft 111, the first control lever 736 can be moved within the slide groove 737, causing the support assembly 730 and the drive motor 710 connected to the first control lever 736 to move in the second direction toward the support platform 720, and fixing the drive motor 710 in the second position 722.

[0160] like Figure 32 and Figure 33 As shown, the stop assembly 760 also includes a limiting seat disposed within the first housing 740. A second control lever 767, connected to the connecting rod 621, is disposed within the limiting seat 763. The second control lever 767 passes through a limiting hole 764. A first limiting block 765 on the connecting rod 621 abuts against one end face of the limiting seat 763 to restrict the axial movement of the second control lever 767 to the distal end. Figure 37As shown, a locking key 770 is slidably connected to the first housing 740. The locking key 770 is inserted and fixed into the insertion hole (not shown) on the second control lever 767. When the locking key 770 on the first housing 740 fixes the second control lever 767, it restricts the axial movement of the second control lever 767. After the axial movement of the second control lever 767 is restricted, the connecting rod 621 and the connecting gear 622 connected to the second control lever 767 can stably mesh with the first transmission gear 612 and the drive gear 630. When it is necessary to change the rotation direction of the torque shaft 111, the steering gear assembly 623 on the connecting rod 621 can be meshed with the speed regulating assembly 610 and the drive gear 630 by operating the second control lever 767.

[0161] Combination Figure 34 As shown, the cutting device 100 also includes a stop assembly 760. The stop assembly 760 includes a guide hole 753 disposed in the first housing 740. One end of the connecting rod 621 is disposed in the guide hole 761 and can move axially along the guide hole 761. By moving axially within the guide hole 761, the connecting rod 621 can change the relative position between the connecting rod 621 and the drive shaft 611, so that the connecting gear 622 or the steering gear assembly 623 on the connecting rod 621 can cooperate with the speed regulating assembly 610 for transmission.

[0162] The resection device 100 of the present invention can change the direction of rotation of the torque shaft 111 as a whole. When there is a blockage between the torque shaft 111 and the outer tube 150, or when other factors cause poor rotation effect, the rotation direction of the torque shaft 111 can be adjusted in time to clear the blockage of the outer tube 150. This avoids the plaque or thrombus from being discharged from the blood vessel in time due to the blockage of the outer tube 150, which could endanger the patient's life. Therefore, the resection device 100 of the present invention can improve the efficiency of surgery.

[0163] In addition, the present invention enables the adjustment of the rotary cutting speed of the torque shaft 111, which can adapt to thrombus tissue of different hardness. By operating the first control lever 736, the meshing relationship between the speed regulating component 610 and the direction adjusting component 620 is adjusted, and power is output to the drive gear 630 and the torque shaft 111 at a higher transmission ratio. Ultimately, the rotational speed of the torque shaft 111 is increased, so that the thrombus tissue is fully crushed and discharged from the outer tube 150.

[0164] Combination Figure 33By operating the first control lever 736, the first control lever 736 is disengaged from the first locking key 751 and moves along the slide groove 737 toward the second locking key 752, and is finally fixed in the second locking key 752. At the same time, the support component 730 and the drive motor 710 connected to the first control lever 736 move toward the second position 722 of the support platform 720 under the drive of the first control lever 736, and finally fix the drive motor 710 on the second position 722. Furthermore, the movement of the drive motor 710 is further restricted by the limiting position of the first control lever 736 in the second locking key 752 and the clamping force provided by the support component 730 to the drive motor 710.

[0165] When the drive motor 710 is fixed at the second position 722 of the support platform 720, the second transmission gear 613 on the drive shaft 611 meshes with the connecting gear 622 on the connecting rod 621. Since the outer diameter of the second transmission gear 613 is larger than the outer diameter of the first transmission gear 612, a ramp connects the second position 722 and the first position 721 to ensure that the second transmission gear 613 can properly mesh and transmit power with the connecting gear 622. Under the action of the first control lever 736, the second fixing plate 732 slides on the slide rail 734, moving the drive motor 710 along the ramp to the second position 722. At this time, the elastic element 733 between the first fixing plate 731 and the second fixing plate 732 is in a compressed state. The greater elastic force generated by the elastic element 733 acts on the drive motor 710, fixing the drive motor 710 in the second position 722. When the drive motor 710 moves to the second position 722 of the support platform 720, the first housing 740 is provided with a second locking key 752 to fix the first control lever 736, so as to prevent the first control lever 736 from moving.

[0166] In this embodiment, the elastic element 733 is a spring, and a guide rod 735 is provided on the second fixing plate 732. The guide rod 735 is sleeved inside the elastic element 733 and passes through the first fixing plate 731, thereby guiding the first fixing plate 731 and the second fixing plate 732. At the same time, it can also prevent the first fixing plate 731 and the second fixing plate 732 from misaligning when pushing the drive motor 710, thus improving the overall strength of the structure.

[0167] After the drive motor 710 is fixed in the second position 722, the second transmission gear 613 on the drive shaft 611 meshes with the connecting gear 622 on the connecting rod 621. The transmission ratio that the second transmission gear 613 and the connecting gear 622 can form is 1.5:1 or 2:1. Therefore, power can be transmitted to the drive gear 630 at a higher transmission ratio, so that the drive gear 630 and the torque shaft 111 have a higher rotational speed. The increased rotational speed of the torque shaft 111 in the outer tube 150 can break up the thrombus tissue contained in the outer tube 150 and discharge it out of the outer tube 150 in time.

[0168] In other embodiments, the second transmission gear 613 and the connecting gear 622 may also adopt other transmission ratios, as long as the rotational speed and torque of the adjusting torque shaft 111 can be guaranteed to adapt to thrombi or plaques of different hardness and effectively clear the outer tube 150.

[0169] like Figure 34 As shown, a fixing key 6211 can be provided on the connecting rod 621. The stop assembly 760 also includes a fixing groove 762 provided in the guide hole 761. The fixing groove 762 is used to cooperate with the fixing key 6211. Through the sliding cooperation between the fixing key 6211 and the fixing groove 762, the rotation of the connecting rod 621 can be prevented. This arrangement can make the connecting rod 621 more stably supported. The connecting gear 622 is rotatably connected to the connecting rod 621 through the connecting bearing 624. The first steering gear 6231 and the second steering gear 6232, which mesh with each other, are rotatably engaged with the connecting rod 621 through the flange 6233.

[0170] Combination Figure 31 and Figure 35 By operating the second control lever 767, the second control lever 767 is moved axially proximally along the limiting hole 764 until the second limiting block 766 on the second control lever 767 abuts against one end face of the limiting seat 763. Simultaneously, the connecting rod 621 connected to the second control lever 767 moves axially proximally. The first steering gear 6231 and the second steering gear 6232 in the steering gear assembly 623 on the connecting rod 621 mesh with the first transmission gear 612 on the drive shaft 611 and also mesh with the drive gear 630. Through the cooperation between the first transmission gear 612, the first steering gear 6231, the second steering gear 6232, and the drive gear 630, the torque shaft 111 connected to the drive gear 630 rotates in different directions. At this time, the drive motor 710 is located in the first position 721 of the support platform 720, and the second control lever 767 cooperates with the locking key 770 on the first housing 740 to limit the axial movement of the second control lever 767.

[0171] In summary, the resection device 100 of this embodiment can adjust the rotational cutting speed of the torque shaft 111 to adapt to thrombus tissue of different hardness. It can also adjust the torque of the torque shaft 111 to clear blockages in the outer tube 150. Furthermore, it can change the overall rotational cutting direction of the torque shaft 111. When blockage occurs between the torque shaft 111 and the outer tube 150, or when other factors cause poor rotational cutting, the rotational cutting direction of the torque shaft 111 can be adjusted in time to clear the blockage in the outer tube 150, preventing plaque or thrombus from failing to exit the blood vessel in time and causing distal embolism. Simultaneously, the anchoring component 200 seals the distal end of the blood vessel to prevent thrombus or plaque from escaping to the distal end. When clearing the outer tube 150, the suction component 140 is used in conjunction to promptly aspirate the thrombus or plaque and remove it from the blood vessel through the suction chamber 141, thus preventing thrombus or plaque from causing embolism in downstream branch vessels.

[0172] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A resection device, comprising a handle and a cutting assembly connected to the handle for resection of intravascular emboli, characterized in that, The cutting assembly includes a torque shaft and a cutting element disposed at the distal end of the torque shaft; the handle is provided with a drive mechanism and a transmission mechanism connecting the drive mechanism and the torque shaft, the drive mechanism drives the torque shaft to rotate through the transmission mechanism, and the transmission mechanism can adjust the rotation direction of the torque shaft; The transmission mechanism includes a speed regulating component and a direction adjusting component for adjusting the rotation direction of the torque shaft. The direction adjusting component includes a connecting rod and a connecting gear and a steering gear assembly disposed on the connecting rod and adapted to the speed regulating component. The connecting gear is rotatably connected to the connecting rod through a connecting bearing, and the transmission direction of the connecting gear is opposite to that of the steering gear assembly. The drive mechanism includes a drive gear connected to the torque shaft, and the drive gear is in transmission engagement with the steering assembly to drive the torque shaft to rotate the cutting piece; the steering gear assembly includes a flange fixedly connected to the connecting rod and a first steering gear and a second steering gear rotatably connected to the flange, and the first steering gear and the second steering gear are connected to the speed regulating assembly and the drive gear respectively after meshing.

2. The resection device according to claim 1, characterized in that, The handle includes a first housing for assembling the drive mechanism and the transmission mechanism. The speed regulating component is connected to the drive mechanism and the steering component. The steering component and the speed regulating component are in a transmission cooperation to form different transmission ratios, thereby adjusting the rotational speed of the torque shaft.

3. The resection device according to claim 2, characterized in that, The drive mechanism includes a support platform, a drive motor mounted on the support platform, and a support assembly for adjusting the position of the drive motor. The drive motor is connected to the speed regulating assembly, and the support assembly controls the transmission state of the speed regulating assembly by adjusting the position of the drive motor.

4. The resection device according to claim 3, characterized in that, The speed regulating component includes a drive shaft connected to the output end of the drive motor and a first transmission gear and a second transmission gear spaced apart on the drive shaft. One of the first transmission gear and the second transmission gear is adapted to the steering component to form a different transmission ratio.

5. The resection device according to claim 3, characterized in that, The support assembly is movably connected to the handle; the first housing is provided with a slide groove, the support assembly includes a first control lever slidably connected to the slide groove, the first control lever is used to drive the drive motor to move, and the handle is provided with a locking assembly, the locking assembly is used to fix the first control lever at a specific position in the slide groove.

6. The resection device according to claim 5, characterized in that, The locking assembly includes a first locking button and a second locking button disposed on the handle. The first locking button and the second locking button are respectively located at both ends of the slide groove. When the first control lever is fixed by the first locking button, the first control lever is located at one end of the slide groove. When the first control lever is fixed by the second locking button, the first control lever is located at the other end of the slide groove.

7. The resection device according to claim 2, characterized in that, The handle also includes a stop assembly for controlling the movement of the connecting rod.

8. The resection device according to claim 7, characterized in that, The stop assembly includes a limit seat disposed in the handle, a limit hole disposed in the limit seat, and a second control lever passing through the limit hole. One end of the second control lever is disposed on the outside of the handle, and the other end of the second control lever is connected to the connecting rod to drive the connecting rod to move, thereby driving the connecting gear and the steering gear assembly to move, thereby adjusting the cooperation relationship between the steering assembly and the speed regulating assembly.

9. The resection device according to claim 8, characterized in that, The stop assembly further includes a first limiting block and a second limiting block disposed on the second control lever. A locking key for locking the second control lever is movably connected to the handle. The first limiting block and the second limiting block cooperate with the locking key to restrict the movement of the second control lever. A guide hole for insertion into the connecting rod is provided in the handle. A fixing groove is provided axially in the guide hole. A fixing key adapted to the fixing groove is provided on the connecting rod.

10. The resection device according to claim 1, characterized in that, The cutting assembly also includes an outer tube and a feed threaded portion. The outer tube is connected to the handle and is sleeved on the outside of the torque shaft. The feed threaded portion is disposed on the torque shaft, and a feed cavity is formed between the outer tube and the torque shaft.

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