Bent push handle and pulsed electric field ablation catheter

Abstract

The application relates to a bending-adjusting and pushing handle and a pulse electric field ablation catheter. The bending-adjusting and pushing handle comprises a shell, a bending-adjusting assembly and a pushing assembly; the bending-adjusting assembly comprises a bending-adjusting wheel, a damping shaft, a bending-adjusting disc and a pull rope connecting piece, the bending-adjusting wheel is rotationally connected with the shell through the damping shaft, the bending-adjusting disc is arranged on the bending-adjusting wheel, and the pull rope connecting piece is arranged on the bending-adjusting disc; the pushing assembly comprises a base, a dial, a transmission device and a sliding block, the base is arranged on the shell, the dial is rotationally connected with the base, the sliding block is slidingly connected with the base, the dial is connected with the sliding block through the transmission device, and when the dial rotates, the sliding block can be driven to slide relative to the base through the transmission device, so that the sliding block pushes the inner tube of a catheter assembly to move. The scheme provided by the application can facilitate operation and simplify the structure.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a bending push handle and a pulsed electric field ablation catheter. Background Technology

[0002] Interventional cardiac therapy is a novel technique for diagnosing and treating cardiovascular diseases. It does not require open-chest surgery. Guided by imaging methods, a catheter is inserted through a superficial blood vessel and, using certain instruments, delivered to the lesion site. Specific cardiac catheterization techniques are then employed to diagnose and treat heart disease. Some interventional catheters are adjustable and maneuverable, such as pulsed electric field ablation catheters. The operator can bend the distal end of the catheter by adjusting the handle, and can change the shape of the ablation component by pushing it, thus adapting to the surgical situation.

[0003] In related technologies, the bending structure in the bending push handle uses a rotating component to pull the guide head to bend, and the push structure uses a button to push the electrode to contract and expand linearly. This bending structure is complex, and some anti-rebound locking parts need to be set up to achieve the suspension during the bending process, which increases reliability and cost. When pressing the button to push, if the push stroke is large, it exceeds the finger flicking distance during use, and the hand grip posture needs to be adjusted back and forth to meet the stroke, which is inconvenient to operate.

[0004] Therefore, there is an urgent need in this field for a bending push handle that is easy to operate and has a simple and reliable structure. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a bending push handle and a pulsed electric field ablation catheter, which facilitates operation and simplifies the structure.

[0006] The first aspect of this application provides a bending push handle, including: a housing, a bending component, and a push component; The bending assembly includes a bending wheel, a damping shaft, a bending disc, and a pull rope connector. The bending wheel is rotatably connected to the housing via the damping shaft. The bending disc is mounted on the bending wheel, and the pull rope connector is mounted on the bending disc. The pushing component includes a base, a dial, a transmission device, and a slider. The base is disposed on the housing. The dial is rotatably connected to the base. The slider is slidably connected to the base. The dial is connected to the slider through the transmission device. When the dial rotates, it can drive the slider to slide relative to the base through the transmission device, so that the slider pushes the inner tube of the conduit assembly to move.

[0007] Furthermore, the pull rope connector is provided with a first through hole for the pull rope to pass through, and the bending disc is provided with a receiving hole for accommodating the pull rope connector, and the side wall of the receiving hole is provided with a clearance groove for the pull rope to pass through.

[0008] Furthermore, the housing is provided with a bushing for abutting the pull rope, the bushing is rotatably connected to the housing, and the bushing is located on one side of the bending assembly.

[0009] Furthermore, the transmission device includes a gear set and a rack, the gear set being connected to the dial and the rack respectively, and the rack being connected to the slider.

[0010] Furthermore, the gear set includes a first gear and a second gear. The first gear is connected to the dial, and the second gear is a double gear. The second gear meshes with the first gear and the rack respectively, and the second gear is rotatably connected to the base.

[0011] Furthermore, the base is provided with a groove, and the slider is slidably disposed within the groove; and / or The slider has a second through hole inside, and a first tube is provided inside the second through hole. A connector is provided at the proximal end of the first tube.

[0012] Furthermore, the aforementioned bending push handle also includes a three-way assembly disposed on the housing, the three-way assembly being sleeved on the guide tube assembly, and the three-way assembly being connected to the base.

[0013] Furthermore, the tee assembly includes a tee pipe, a sealing ring, a tee cap, and a second pipe body. The tee cap is connected to one end of the tee pipe, the sealing ring is located between the end face of the tee pipe and the tee cap, and the second pipe body is connected to the end of the tee cap opposite to the tee pipe.

[0014] Furthermore, the bending wheel is provided with a first lever, the dial is provided with a second lever, and the housing is provided with a receiving cavity for accommodating the bending assembly and the pushing assembly. The first lever and the second lever are both located on the outside of the housing.

[0015] A second aspect of this application provides a pulsed electric field ablation catheter, comprising: a catheter assembly and a bending and pushing handle as described in any of the preceding claims. The catheter assembly includes an ablation component, an inner tube, and an outer tube sleeved on the inner tube. The inner tube is telescopically movable relative to the outer tube. A pull rope is provided inside the outer tube. The distal end of the inner tube extends beyond the distal end of the outer tube. The ablation component is connected to the distal ends of the inner tube and the outer tube, respectively.

[0016] The technical solution provided in this application may include the following beneficial results: by replacing the anti-rebound locking parts in related technologies with the rotational friction resistance of the damping shaft, the bending wheel can be suspended at any position, thereby eliminating the complex locking mechanism, reducing the number of parts, reducing the failure rate and cost. By converting the rotational motion of the dial into the linear displacement of the slider through the transmission device, a long stroke can be achieved by flicking with a single finger, without the need to repeatedly change grips, maintaining a stable hand grip posture, and facilitating operation.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure of the pulsed electric field ablation catheter shown in the embodiments of this application; Figure 2 This is an exploded schematic diagram of the pulsed electric field ablation catheter shown in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the catheter assembly, the three-way assembly, and the push assembly shown in the embodiments of this application; Figure 4 This is an exploded view of the push component shown in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the dial shown in the embodiments of this application; Figure 6 This is an exploded view of the bending assembly shown in an embodiment of this application; Figure 7 This is an exploded view of the three-way assembly shown in the embodiments of this application; Figure 8 This is a schematic diagram of the pulsed electric field ablation catheter shown in the embodiments of this application; Figure 9 This is a cross-sectional view of the pulsed electric field ablation catheter shown in an embodiment of this application; Figure 10 yes Figure 9 A magnified view of a section at point A in the middle; Figure 11 yes Figure 9 A magnified view of a section at point B in the middle; Figure 12 yes Figure 9 A magnified view of a section at point C.

[0020] Figure label: 1-Adjusting component, 11-Adjusting wheel, 111-First lever, 12-Damping shaft, 13-Adjusting disc, 131-Receiving hole, 14-Pull rope connector, 141-First through hole, 15-Screw, 2-Housing, 21-Lower cover, 22-Upper cover, 3-Tee assembly, 31-Tee pipe, 32-Sealing ring, 33-Tee cover, 34-Second tube body, 4-Conduit assembly, 41-Ablation component, 42-Inner tube, 43-Outer tube, 44-Pull rope, 5-Pushing component, 50-Screw, 51-Rack, 52-Slider, 521-Second through hole, 53-Second gear, 54-Pin, 55-Base, 551-Slide groove, 56-First gear, 57-Dial disc, 571-Second lever, 58-First tube body, 59-Connector, 7-Stress relief tube, 8-Fixing plate, 9-Shaft sleeve. Detailed Implementation

[0021] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0022] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In related technologies, the bending structure in the bending push handle uses a rotating component to pull the guide head to bend, and the push structure uses a button to push the electrode to contract and expand linearly. This bending structure is complex, and some anti-rebound locking parts need to be set up to achieve the suspension during the bending process, which increases reliability and cost. When pressing the button to push, if the push stroke is large, it exceeds the finger flicking distance during use, and the hand grip posture needs to be adjusted back and forth to meet the stroke, which is inconvenient to operate.

[0026] To address the aforementioned issues, this application provides a bending push handle and a pulsed electric field ablation catheter, which facilitates operation and simplifies the structure.

[0027] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 9 As shown, this application embodiment provides a pulsed electric field ablation catheter, including a catheter assembly 4 and a bending and pushing handle. The catheter assembly 4 includes an ablation component 41, an inner tube 42, and an outer tube 43 sleeved on the inner tube 42. The inner tube 42 can extend and retract relative to the outer tube 43. A pull rope 44 is provided inside the outer tube 43. The distal end of the inner tube 42 extends beyond the distal end of the outer tube 43. The ablation component 41 is connected to the distal end of the inner tube 42 and the distal end of the outer tube 43, respectively.

[0029] It should be noted that in this embodiment, "distal" and "proximal" are defined based on their axial distance from the operator (e.g., a physician) of the catheter assembly 4, with the end closer to the operator being the proximal end and the end farther from the operator being the distal end. Specifically, as shown... Figure 8 and Figure 9 As shown, in the embodiments of this application, the distal end of the inner tube 42 and the outer tube 43 refers to their left end in the figure, and the proximal end of the inner tube 42 and the outer tube 43 refers to their right end in the figure.

[0030] The bending push handle includes a housing 2, a bending assembly 1, and a push assembly 5. The bending assembly 1 includes a bending wheel 11, a damping shaft 12, a bending disc 13, and a pull rope connector 14. The bending wheel 11 is rotatably connected to the housing 2 via the damping shaft 12. The bending disc 13 is mounted on the bending wheel 11, and the pull rope connector 14 is mounted on the bending disc 13.

[0031] The proximal end of the pull rope 44 is connected to the pull rope connector 14. The operator rotates the bending wheel 11, causing it to rotate relative to the housing 2. The bending wheel 11 drives the damping shaft 12 to rotate, and simultaneously drives the bending disc 13 to rotate synchronously. The bending disc 13 drives the pull rope connector 14 to move, thereby pulling or releasing the pull rope 44 from the outer tube 43. When the pull rope 44 is pulled out or released, the degree of bending of the outer tube 43 can be changed, thus achieving the bending of the conduit assembly 4. The number of pull ropes 44 inside the outer tube 43 can be set to one, two, or more, thereby satisfying bending in multiple directions.

[0032] In this embodiment, the outer tube 43 is provided with two oppositely arranged pull ropes 44. When the bending assembly 1 pulls one of them toward the near end, the other moves toward the far end. Specifically, as shown in the figure... Figure 8 As shown, the bending assembly 1 can bend the distal end of the conduit assembly 4 in both upward and downward directions by means of two pull ropes 44. Correspondingly, there are two pull rope connectors 14, which are connected to the two pull ropes 44 one by one.

[0033] When the operator rotates the bending wheel 11 to a certain position to bend the distal end of the guide tube assembly 4 into place, the rotation of the bending wheel 11 is stopped. At this time, under the damping action of the damping shaft 12, the bending wheel 11 can be locked in this position, thereby realizing the bending wheel 11 can be suspended at any position. There is no need to set up a complex locking mechanism, which can reduce the number of parts, reduce the failure rate and cost, and improve reliability.

[0034] The damping shaft 12 can generate damping force in various ways, as long as it can provide damping force to the bending wheel 11. For example, the damping shaft 12 has a rotating shaft and a bushing sleeved on the rotating shaft. The damping shaft 12 can provide damping force by utilizing the friction generated when the rotating shaft and bushing rotate relative to each other through the interference fit between the rotating shaft and the bushing; or a damping grease with a certain viscosity can be placed between the rotating shaft and the bushing, and the damping force can be provided by the viscosity of the damping grease; or the damping shaft 12 can also be a plastic rod (such as a polyurethane rod or a nylon rod), and the bending wheel 11 is interference-fitted with the damping shaft 12, and the damping force can be provided by the friction between the bending wheel 11 and the damping shaft 12.

[0035] like Figure 4 As shown, the pushing component 5 includes a base 55, a dial 57, a transmission device, and a slider 52. The base 55 is located on the housing 2. The dial 57 is rotatably connected to the base 55, and the slider 52 is slidably connected to the base 55. The slider 52 can slide relative to the base 55 along the axial direction of the conduit assembly 4. The dial 57 is connected to the slider 52 through the transmission device. When the dial 57 rotates, it can drive the slider 52 to slide relative to the base 55 through the transmission device, so that the slider 52 pushes the inner tube 42 of the conduit assembly 4 to move.

[0036] Specifically, the base 55 is fixedly installed in the housing 2, the proximal part of the inner tube 42 is fixedly connected to the slider 52, and the outer tube 43 is fixed relative to the housing 2. When the slider 52 slides, it can drive the inner tube 42 to extend and retract relative to the outer tube 43, thereby changing the length of the distal end of the inner tube 42 extending beyond the distal end of the outer tube 43, that is, changing the distance between the distal end of the inner tube 42 and the distal end of the outer tube 43, thereby changing the shape of the ablation component 41.

[0037] like Figure 8 As shown, when the length of the distal end of the inner tube 42 extending out of the outer tube 43 increases, the ablation component 41 can be extended, thereby reducing the vertical width of the ablation component 41 and improving the passability of the ablation component 41. When the length of the distal end of the inner tube 42 extending out of the outer tube 43 decreases, the ablation component 41 can be contracted, thereby increasing the vertical width of the ablation component 41 and increasing the ablation area of ​​the ablation component 41.

[0038] By converting the rotational motion of the dial 57 into the linear displacement of the slider 52 via a transmission device, for example, when the dial 57 is turned to the left, the dial 57 drives the slider 52 to move to the left, and when the dial 57 is turned to the right, the dial 57 drives the slider 52 to move to the right. In this way, a single finger can turn the dial 57 to achieve a long stroke of the inner tube 42 without having to repeatedly change grips. This keeps the hand holding the handle in a stable position and makes it easy to operate.

[0039] In some embodiments, such as Figure 6 As shown, the pull rope connector 14 has a first through hole 141 for the pull rope 44 to pass through, and the bending disc 13 has a receiving hole 131 for accommodating the pull rope connector 14. The side wall of the receiving hole 131 has a clearance groove for the pull rope 44 to pass through. After the proximal end of the pull rope 44 passes through the first through hole 141, the pull rope connector 14 is placed in the receiving hole 131 and the pull rope 44 passes through the clearance groove. Then, the pull rope connector 14 is rotated to displace the first through hole 141 from the clearance groove, preventing the pull rope 44 from falling out of the first through hole 141. The pull rope 44 is fastened to the bending disc 13 by the clamping between the pull rope connector 14 and the inner wall of the receiving hole 131.

[0040] In some embodiments, such as Figure 6 As shown, the bending disc 13 is fixedly connected to the bending wheel 11 by screws 15.

[0041] In some embodiments, such as Figure 2 and Figure 9 As shown, the housing 2 is provided with a bushing 9 for abutting the pull rope 44. The bushing 9 is rotatably connected to the housing 2 and is located on one side of the bending assembly 1. The pull rope 44 is connected to the bending assembly 1 after passing through the bushing 9. In this way, when the bending assembly 1 drives the pull rope 44 to move, the pull rope 44 abuts against the bushing 9 and drives the bushing 9 to rotate, thereby reducing the friction on the pull rope 44 and preventing damage to the pull rope 44.

[0042] Specifically, a column is provided on one side of the housing 2, and the bushing 9 is rotatably fitted on the column. A fixing piece 8 is provided at the end of the column that is not connected to the housing 2. The fixing piece 8 limits the bushing 9 and prevents the bushing 9 from falling off the column.

[0043] In some embodiments, such as Figure 4 As shown, the transmission device includes a gear set and a rack 51. The gear set is connected to the dial 57 and the rack 51 respectively, and the rack 51 is connected to the slider 52. The rotational motion of the dial 57 is converted into the linear motion of the slider 52 through the transmission of gears and rack 51, which facilitates operation. The transmission ratio of the gear set can be changed to change the movement efficiency of the slider 52 and improve the user experience.

[0044] In some embodiments, such as Figure 4 and Figure 5 As shown, the gear set includes a first gear 56 and a second gear 53. The first gear 56 is connected to the dial 57. The second gear 53 is a double gear. The second gear 53 meshes with the first gear 56 and the rack 51 respectively. The second gear 53 is rotatably connected to the base 55.

[0045] Specifically, the double gear has two coaxially arranged teeth, one of which meshes with the first gear 56 and the other meshes with the rack 51. The diameters of the two teeth can be different, with the smaller diameter tooth meshing with the first gear 56 and the larger diameter tooth meshing with the rack 51. This allows the slider 52 to move a longer stroke when the dial 57 rotates at a small angle, making it easier to operate.

[0046] In some embodiments, such as Figure 4 As shown, rack 51 is fixedly connected to slider 52 by screw 50, second gear 53 is rotatably connected to base 55 by pin 54, first gear 56 is rotatably connected to base 55 by another pin 54, and dial 57 is coaxially fixedly connected to first gear 56.

[0047] In some embodiments, such as Figure 4 As shown, a groove 551 is provided on the base 55, and a slider 52 is slidably disposed in the groove 551. The right end of the groove 551 has an opening, and the end of the slider 52 can extend out of the opening of the groove 551.

[0048] In some embodiments, such as Figure 4 As shown, the slider 52 has a second through hole 521 inside, and a first tube 58 is provided inside the second through hole 521. A connector 59 is provided near the proximal end of the first tube 58. Please refer to the following: Figures 9 to 12The first tube 58 passes through the second through hole 521. The first tube 58 is fixedly connected to the right end of the slider 52. The inner tube 42 extends into the first tube 58. The proximal end of the inner tube 42 and the proximal end of the first tube 58 are both fixedly connected to the connector 59. When sliding, the first tube 58 is moved, and the first tube 58 moves the inner tube 42 synchronously.

[0049] The connector 59 allows a guide wire to pass through, extending into the inner tube 42. It also allows liquid to be injected into the inner tube 42 or air to be flushed through the inner tube 42 channel.

[0050] In some embodiments, such as Figure 2 , Figure 3 and Figure 7 As shown, the bending push handle also includes a three-way assembly 3 disposed on the housing 2. The three-way assembly 3 is sleeved on the conduit assembly 4 and is fixedly connected to the base 55. Specifically, liquid can be injected into the outer tube 43 through the three-way assembly 3. The inner tube 42 passes through the three-way assembly 3, and the three-way assembly 3 is connected to the proximal end of the outer tube 43.

[0051] In some embodiments, such as Figure 2 , Figure 3 , Figure 7 and Figure 10 As shown, the tee assembly 3 includes a tee pipe 31, a sealing ring 32, a tee cap 33, and a second pipe body 34. The tee cap 33 is connected to one end of the tee pipe 31, the sealing ring 32 is located between the end face of the tee pipe 31 and the tee cap 33, and the second pipe body 34 is connected to the end of the tee cap 33 that is away from the tee pipe 31.

[0052] The sealing ring 32 is fitted onto the inner tube 42 to prevent the liquid injected from the three-way pipe 31 from leaking along the inner tube 42 to the proximal end. The second tube body 34 is located inside the second through hole 521 and is fitted onto the first tube body 58. In this way, even if a small amount of liquid leaks, the leaked liquid can exist between the first tube body 58 and the second tube body 34, preventing direct overflow.

[0053] In some embodiments, such as Figure 6 As shown, the bending wheel 11 is equipped with a first lever 111, which is arranged perpendicular to the radial direction of the bending wheel 11, facilitating the operator to rotate the bending wheel 11. Specifically, the bending wheel 11 has two first levers 111 arranged vertically opposite each other, allowing the operator to rotate the bending wheel 11 clockwise and counterclockwise using two fingers while holding the handle. Figure 5As shown, the dial 57 is provided with a second lever 571, which is arranged perpendicular to the radial direction of the dial 57, making it convenient for the operator to rotate the dial 57. The housing 2 is provided with a receiving cavity for accommodating the bending assembly 1 and the pushing assembly 5. The first lever 111 and the second lever 571 are both located on the outside of the housing 2, so that the operator can easily move the first lever 111 and the second lever 571 with their fingers when holding the housing 2.

[0054] Specifically, the housing 2 includes a lower cover 21 and an upper cover 22, which are detachably connected and form a receiving cavity. The distal end of the housing 2 is provided with a stress-relieving tube 7, which is sleeved on the lower cover 21 and the upper cover 22. The stress-relieving tube 7 is used to reduce the stress generated by the bending of the conduit assembly 4 and prevent damage to the conduit assembly 4.

[0055] In some embodiments, the outer tube 43 is further provided with a wire, one end of which is electrically connected to the electrode on the ablation component 41, and the other end of which is electrically connected to the PCBA board. The PCBA board supplies power to the electrode on the ablation component 41 through the wire. The PCBA board can be fixedly installed on the base 55 and waterproofed by potting.

[0056] The assembly process of the pulsed electric field ablation catheter in this embodiment of the application is as follows: First, put the sealing ring 32 into the tee cover 33, then rotate and fix the tee cover 33 and the tee pipe 31. Fix the second pipe body 34 onto the tee cover 33 with glue. Then, put the assembled tee assembly 3 into the conduit assembly 4 and fix it with glue to the outer pipe 43.

[0057] When assembling the push component 5, first place the dial 57 into the first gear 56 and fix it with hot melt or glue. Then, place the whole assembly into the base 55 and insert the pin 54. Place the slider 52 into the base 55. Next, align the rack 51 and press it into the slider 52 and fix it with the screw 50 so that it can slide in the slide groove 551 of the base 55. Then, press in another pin 54. When placing the second gear 53, push the assembled slider 52 and the first gear 56 to the same side. Then, make sure the second gear 53 meshes smoothly with both the rack 51 and the first gear 56. Slide the right end cylinder of the assembled slider 52 out of the base 55, insert the first tube 58 and fix it with glue.

[0058] Secure the assembled tee assembly 3 and conduit assembly 4 together onto the push assembly 5. Insert the tee assembly 3 into the base 55 from the side. Insert the inner tube 42 of the conduit assembly 4 into the first tube body 58 and fix it with glue. Then, fit the connector 59 and fix it with glue. Finally, place them together into the lower cover 21 for fixation.

[0059] Next, press the damping shaft 12 into the lower cover 21, and then press the bending wheel 11 into the damping shaft 12 to form a basic bending structure. Place the two bushings 9 into the lower cover 21, with the pull rope 44 on the guide tube assembly 4 positioned between the two bushings 9. Place the fixing piece 8 and fix the fixing piece 8 to the lower cover 21 together using hot melt or adhesive. Align the bending disc 13 with the mounting holes on the bending wheel 11 and place it onto the bending wheel 11, securing it with two screws 15. Arrange the pull ropes 44 on both sides of the guide tube assembly 4 and wind them around the bending disc 13. The pull ropes 44 on both sides of the guide tube assembly 4 should pass through the first through hole 141 of the pull rope connector 14. Press the pull rope connector 14 into the receiving holes 131 on both sides of the bending disc 13, and use a flathead screwdriver to rotate the pull rope connector 14 to secure it, ensuring that the pull ropes 44 on the guide tube assembly 4 are taut and without any play. Finally, cover the upper cover 22, install the stress relief tube 7, and complete the assembly.

[0060] In summary, the bending push handle and pulsed electric field ablation catheter provided in this application embodiment employ a gear propulsion structure that allows for long-stroke movement of the lever, significantly improving speed and efficiency. This also enhances the user experience, resolving the issue of insufficient finger travel requiring frequent adjustments to the handle grip when using button operation, and addressing the problems of low efficiency and easy misalignment associated with knob-based long-stroke propulsion due to increased rotation counts. The bending structure in this application embodiment utilizes a damping shaft 12 design, and the bending wheel 11 provides smooth operation and good force application, enabling arbitrary hovering. It is simple, reliable, reduces the number of parts, increases reliability, and lowers costs.

[0061] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0062] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A bent push handle, characterized in that include: Housing, bending assembly, and pushing assembly; The bending assembly includes a bending wheel, a damping shaft, a bending disc, and a pull rope connector. The bending wheel is rotatably connected to the housing via the damping shaft. The bending disc is mounted on the bending wheel, and the pull rope connector is mounted on the bending disc. The pushing assembly includes a base, a dial, a transmission device, and a slider. The base is disposed on the housing. The dial is rotatably connected to the base. The slider is slidably connected to the base. The dial is connected to the slider through the transmission device. When the dial rotates, it can drive the slider to slide relative to the base through the transmission device, so that the slider pushes the inner tube of the conduit assembly to move.

2. The bending push handle according to claim 1, characterized in that: The pull rope connector is provided with a first through hole for the pull rope to pass through, and the bending disc is provided with a receiving hole for accommodating the pull rope connector. The side wall of the receiving hole is provided with a clearance groove for the pull rope to pass through.

3. The bending push handle according to claim 1, characterized in that: The housing is provided with a bushing for abutting the pull rope. The bushing is rotatably connected to the housing and is located on one side of the bending assembly.

4. The bending push handle according to claim 1, characterized in that: The transmission device includes a gear set and a rack, the gear set being connected to the dial and the rack respectively, and the rack being connected to the slider.

5. The bending push handle according to claim 4, characterized in that: The gear set includes a first gear and a second gear. The first gear is connected to the dial, and the second gear is a double gear. The second gear meshes with the first gear and the rack respectively, and the second gear is rotatably connected to the base.

6. The bending push handle according to claim 1, characterized in that: The base is provided with a groove, and the slider is slidably disposed within the groove; and / or The slider has a second through hole inside, and a first tube is provided inside the second through hole. A connector is provided at the proximal end of the first tube.

7. The bending push handle according to claim 1, characterized in that: It also includes a tee assembly disposed on the housing, the tee assembly being sleeved on the conduit assembly, and the tee assembly being connected to the base.

8. The bending push handle according to claim 7, characterized in that: The tee assembly includes a tee pipe, a sealing ring, a tee cap, and a second pipe body. The tee cap is connected to one end of the tee pipe, the sealing ring is located between the end face of the tee pipe and the tee cap, and the second pipe body is connected to the end of the tee cap opposite to the tee pipe.

9. The bending push handle according to claim 1, characterized in that: The bending wheel is provided with a first lever, the dial is provided with a second lever, and the housing is provided with a receiving cavity for accommodating the bending assembly and the pushing assembly. The first lever and the second lever are both located on the outside of the housing.

10. A pulsed electric field ablation catheter, comprising: include: The catheter assembly comprises an ablation component, an inner tube and an outer tube sleeved on the inner tube, the inner tube is capable of telescopic movement relative to the outer tube, a pull rope is arranged in the outer tube, a distal end of the inner tube extends out of a distal end of the outer tube, and the ablation component is connected with the distal end of the inner tube and the distal end of the outer tube respectively.

Images