Bipolar ablation electrode

Abstract

The utility model discloses a bipolar ablation electrode which comprises a handle mechanism, an electrode wire and a clamping mechanism. The handle mechanism comprises a handle and an outer sheath tube, a containing cavity is formed in the handle, the outer sheath tube is fixed to the handle, and a channel communicated with the containing cavity is formed. The electrode wires comprise the first electrode wire and the second electrode wire which are arranged in the containing cavity and extend out of the outer sheath tube through the outer sheath tube channel. The clamping mechanism comprises a first clamping plate, a second clamping plate and a driving assembly, and the first clamping plate and the second clamping plate are connected to an opening of the outer sheath tube in a pivoted mode, abut against the outer sides of the first electrode wire and the second electrode wire respectively and are close to the clamping ends of the first electrode wire and the second electrode wire respectively. The driving assembly is arranged in the containing cavity and connected with the first clamping plate and the second clamping plate and drives the first clamping plate and the second clamping plate to get close to each other and get away from each other, so that the clamping ends of the first electrode wire and the second electrode wire get close to each other. The bipolar ablation electrode can keep clamping stability and is not prone to being pulled, and the damage range is prevented from being too large.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a bipolar ablation electrode capable of maintaining clamping accuracy. Background Art

[0002] In the field of surgical operations, surgeons need to be extremely careful when grasping materials in the surgical area, especially in neurosurgical operations. Surgeons often need to move nerves or other sensitive materials. In spinal surgeries, such grasping may also be related to repairing herniated discs.

[0003] When using an electrosurgical forceps to grasp materials on the back and supply electrosurgical current to these materials, surgeons need to be extremely careful because after grasping, when applying electrosurgical current, only the desired materials need to be grasped. Failing to accurately grasp the correct materials may cause damage to the surrounding nerves and patients, especially when using electrosurgical current.

[0004] In actual operation, there are defects related to this accuracy. The movement of the tweezers may be accompanied by their actuation, or the movement of the surgeon's hand may interfere with accurate grasping.

[0005] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the utility model and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a bipolar ablation electrode to solve the problem of accuracy in actual operation in the prior art and reduce the operation difficulty of medical staff.

[0007] To achieve the above purpose, the utility model provides a bipolar ablation electrode, including a handle mechanism, electrode wires, and a clamping mechanism. The handle mechanism includes a handle and an outer sheath tube. The handle forms a receiving cavity, and the outer sheath tube is fixed to the handle and forms a channel communicating with the receiving cavity. The electrode wires include a first electrode wire and a second electrode wire disposed in the receiving cavity and extending outside the outer sheath tube through the channel of the outer sheath tube. The clamping mechanism includes a first clamping plate, a second clamping plate, and a driving component. The first clamping plate and the second clamping plate are pivotally connected to the opening of the outer sheath tube and respectively abut against the outer sides of the first electrode wire and the second electrode wire, and are respectively close to the clamping ends of the first electrode wire and the second electrode wire. The driving component is disposed in the receiving cavity, and is connected to and drives the first clamping plate and the second clamping plate to approach and separate from each other, so that the clamping ends of the first electrode wire and the second electrode wire approach each other.

[0008] In one or more embodiments, the handle mechanism further includes an operation button disposed on the handle. The driving assembly includes an operation slider, an operation rod, a first clamping link, and a second clamping link. The operation slider is movably disposed in the accommodation cavity and is controllably connected to the operation button. The operation rod is fixed to the operation slider and extends through the channel to the opening of the outer sheath tube. Both ends of the first clamping link are rotatably connected to the operation rod and the first clamping plate, and both ends of the second clamping link are rotatably connected to the operation rod and the second clamping plate.

[0009] In one or more embodiments, a protrusion is provided on the side wall of the operation slider. The protrusion is formed with an inclined guiding surface. A convex block is formed on the operation button and faces the protrusion. The convex block acts on the guiding surface and drives the operation slider to move in a direction away from the outer sheath tube through the guiding surface.

[0010] In one or more embodiments, the driving assembly further includes a return spring, which is pressed between the operation slider and the inner wall of the handle on the side away from the outer sheath tube.

[0011] In one or more embodiments, the operation slider is formed with through holes for the first electrode wire and the second electrode wire to pass through, and the through holes are coaxial with the channel.

[0012] In one or more embodiments, the aperture of the through hole is larger than the outer diameter of the outer sheath tube.

[0013] In one or more embodiments, a first limiting groove and a second limiting groove are provided on the inner wall of the outer sheath tube, and the operation rod moves along the extending direction of the first limiting groove and the second limiting groove.

[0014] In one or more embodiments, a window communicating with the accommodation cavity is provided on the side wall of the handle. The operation button extends into the accommodation cavity through this window, and one end of the operation button is rotatably disposed on the side wall of the handle, and the other end is formed with a hook claw. The hook claw is located in the accommodation cavity and abuts against the inner wall of the handle when the operation button rotates out of the accommodation cavity.

[0015] In one or more embodiments, the operation button includes a first operation button and a second operation button oppositely disposed on both sides of the handle.

[0016] In one or more embodiments, insulating tubes are respectively sleeved outside the first electrode wire and the second electrode wire, and the clamping ends of the first electrode wire and the second electrode wire are exposed from the insulating tubes, and / or the clamping ends of the first electrode wire and the second electrode wire are respectively formed with tweezer tips.

[0017] Compared with the prior art, in the bipolar ablation electrode according to the present utility model, the clamping plate is arranged at a position close to the clamping end of the electrode wire and can be driven by a driving assembly, so as to maintain the accuracy of clamping, and it is not easy to pull the tissue during clamping, resulting in an overly large damage range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a bipolar ablation electrode according to an embodiment of the present utility model;

[0019] Figure 2 is an exploded view of the handle position of a bipolar ablation electrode according to an embodiment of the present utility model;

[0020] Figure 3 is an exploded view of the tip position of a bipolar ablation electrode according to an embodiment of the present utility model;

[0021] Figure 4 is a schematic diagram of the mouth of an outer sheath tube according to an embodiment of the present utility model.

[0022] MAIN REFERENCE NUMERAL DESCRIPTION:

[0023] 100 - bipolar ablation electrode, 10 - handle mechanism, 11 - handle, 111 - window, 112 - operation button, 1121 - hook claw, 1122 - convex block, 12 - outer sheath tube, 121 - limiting groove, 20 - electrode wire, 21 - tip, 22 - insulating tube, 23 - plug, 31 - clamping plate, 321 - operation slider, 3211 - protrusion, 322 - operation rod, 323 - clamping link, 324 - return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. However, it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

[0025] Unless otherwise clearly stated, throughout the specification and claims, the term "comprise" or its variations such as "comprises" or "comprising" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0026] As Figures 1 to 4As shown, a bipolar ablation electrode 100 according to an embodiment of the present utility model includes a handle mechanism 10, electrode wires 20, and a clamping mechanism. The handle mechanism 10 includes a handle 11 and an outer sheath tube 12. A receiving cavity is formed inside the handle 11. The hollow outer sheath tube 12 is fixed to the handle 11, and its internal channel communicates with the receiving cavity of the handle 11. Two electrode wires 20 are fixed inside the receiving cavity of the handle 11 and extend outside the outer sheath tube 12. The clamping mechanism includes two clamping plates 31 and a driving assembly disposed inside the handle 11 and connected to the clamping plates 31. As Figure 3 shown, the two clamping plates 31 are pivotally connected to the opening of the outer sheath tube 12 and respectively abut against the outer sides of the electrode wires 20. The driving assembly is connected to the clamping plates 31 and drives them to approach and separate from each other. When the clamping plates 31 approach each other, the electrode wires 20 are pressed by them and thus approach each other; when the clamping plates 31 separate from each other, the electrode wires 20 lose the pressure and reset under the action of their own elastic force.

[0027] In the above embodiment, since the clamping plates 31 are disposed close to the clamping ends of the electrode wires 20, a small displacement of the clamping plates 31 can drive a small displacement of the electrode wires 20, so that the distance between the clamping ends of the two electrode wires 20 can be contracted within a very small range, maintaining the accuracy of clamping the target part and not easily pulling the tissue to cause an excessive damage range during clamping.

[0028] In an embodiment, an operation button 112 is provided on the handle 11. The driving assembly includes an operation slider 321, an operation rod 322, and two clamping connecting rods 323. The operation slider 321 is disposed inside the handle 11 and is controllably connected to the operation button 112. That is, the movement of the operation button 112 can control the axial movement of the operation slider 321 inside the handle 11. The operation rod 322 is fixed to one end of the operation slider 321 and extends to the opening of the outer sheath tube 12. The two ends of the clamping connecting rod 323 are respectively pivotally connected to the clamping plate 31 and the end of the operation rod 322.

[0029] As Figure 2 shown, when a pressing force is applied to the operation button 112, the operation button 112 moves inward and acts on the operation slider 321, causing it to move downward along the axis of the handle 11 (in the direction away from the outer sheath tube 12). Since the operation rod 322 is fixedly connected to the operation slider 321, the operation rod 322 moves downward synchronously. Under the action of the operation connecting rod 323, the two clamping plates 31 approach each other and press the clamping ends of the electrode wires 20 to approach each other to complete the clamping of the target part.

[0030] Specifically, as Figure 2As shown, on the hollow pipe, the operation slider 321 can be provided with a polygonal protrusion 3211 which forms an inclined guiding surface, and a protrusion 1122 is arranged on the inner side of the operation button 112. After the operation button 112 is pressed, the protrusion 1122 contacts and abuts against the inclined guiding surface of the protrusion 3211, and the protrusion 1122 can move upward along the inclined guiding surface, thereby causing the axial downward movement of the operation slider 321.

[0031] In addition, the outer sheath tube 12 is used to provide limits for the electrode wire 20, the operating rod 322, etc., to ensure the moving direction, avoid moving or bending in other directions, and at the same time provide a pivoting fulcrum for the clamping plate 31.

[0032] To further improve stability and prevent short circuits, an insulating tube 22 is sleeved outside each electrode wire 20. And as Figure 3 shown, at the end of the electrode wire 20, it extends outside the outer sheath tube 12 and forms a forceps tip 21 structure. Compared with the situation without this structure, the forceps tip 21 can provide more operating space and can adapt to more clamping environments.

[0033] It can be imagined that in order to make the ends of the electrode wires 20 move away from each other to achieve reset after the pressing force is lost, a reset spring 324 is also arranged inside the handle 11, which is squeezed between the side of the operation slider 321 away from the outer sheath tube 12 and the inner wall of the handle 11. When the operation button 112 is pressed, the operation slider 321 moves backward, and the reset spring 324 is squeezed to store energy. After the pressing force is lost, the reset spring 324 releases the stored energy to push the operation slider 321 to move forward, and the operation connecting rod 323 pushes the ends of the clamping plate 31 to move away from each other. At this time, the electrode wire 20 resets under the action of its own elastic force.

[0034] A channel (not shown in the figure) can be opened on the operation slider 321, and this channel is coaxial with the inner channel of the outer sheath tube 31. Therefore, the electrode wire 20 can extend through the inside of the operation slider 321, avoiding the situation of messy lines caused by external extension.

[0035] The operating rod 322 is fixed at the end of the operation slider 321, and since it extends inside the outer sheath tube 12, the two electrode wires 20 can be separated to prevent short circuits. At the same time, the inner diameter of the channel of the operation slider 321 is larger than the outer diameter of the outer sheath tube 12, so the outer sheath tube 12 can extend into the channel of the operation slider 321.

[0036] To ensure the moving direction of the operating rod 322, two limiting grooves 121 are arranged on the inner wall of the outer sheath tube 12, and the operating rod 322 is clamped in the limiting grooves 121 to prevent it from rotating inside the outer sheath tube 12 and even affecting the operation connecting rod 323 and the clamping plate 31.

[0037] A window 111 communicating with the internal accommodation cavity is provided on the side wall of the handle 11. The operation button 112 is arranged within the range of the window 111. One end of the operation button 112 is rotatably arranged on the side wall of the handle 11, and the other end is provided with a hook claw 1121 structure. The hook claw 1121 can prevent the operation button 112 from detaching when the operation button 112 rotates, so as to improve stability.

[0038] As Figure 2 shown, the handle 11 has two operation buttons 112, which are oppositely arranged on both sides of the handle 11. Correspondingly, the handle 11 is composed of two parts with exactly the same structure, and the operation buttons 112 are respectively arranged on one of the parts. Such a setting form is convenient for production and assembly. The electrode wire 20 extends from the tail of the handle 11 and is energized through the plug 23.

[0039] Next, in combination with specific usage scenarios, the bipolar ablation electrode 100 provided by the present utility model will be further described.

[0040] When assembling the bipolar ablation electrode 100, first pass the electrode wire 20 through the insulating tube 22, then load the two together into the outer sheath tube 12 and pass them through the channel of the operation slider 321, and finally weld them to the cable. Subsequently, align the operating rod 322 with the limiting groove 121 and pass it through the outer sheath tube 12, and bond it to the operation slider 321. Hinge the clamping connecting rod 323 to the clamping plate 31 and the operating rod 322 to ensure that they can rotate, and hinge the clamping plate 31 to the outer sheath tube 12. Finally, install the operation button 112 and assemble the two parts of the handle 11.

[0041] When using the bipolar ablation electrode 100, after the tweezer tips 21 contact the human target site, press the operation button 112. The convex block 1122 acts on the inclined guiding surface of the protrusion 3211, driving the operation slider 321 to move backward. The operating rod 322 moves backward synchronously, thereby driving the distal clamping plates 31 to approach each other. The return spring 324 is compressed to store energy. The tweezer tips 21 approach each other and complete the clamping of the target site. After electrocision or electrocoagulation is completed, release the operation button 112. The return spring 324 releases the stored energy and pushes the operation slider 321 forward. Through the operating rod 322, the clamping plates 31 move away from each other. After the electrode wire 20 loses its limit, it resets under the action of its own elastic force, and the tweezer tips 21 move away from each other and disengage from the target site.

[0042] The foregoing description of specific exemplary embodiments of the present utility model is for purposes of illustration and exemplification. These descriptions are not intended to limit the present utility model to the precise forms disclosed, and it is apparent that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present utility model and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present utility model, as well as various different selections and changes. The scope of the present utility model is intended to be defined by the claims and their equivalents.

Claims

1. A bipolar ablation electrode, characterized in that: include: The handle mechanism comprises a handle and an outer sheath tube, wherein the handle is formed with a receiving cavity, and the outer sheath tube is fixed to the handle and is formed with a channel communicating with the receiving cavity; The electrode wires include a first electrode wire and a second electrode wire which are arranged in the accommodating cavity and extend to the outside of the outer sheath tube through the channel; as well as Clamping mechanism, comprising: A first clamping plate and a second clamping plate are pivotally connected to the opening of the outer sheath tube and respectively abut against the outer side of the first electrode wire and the second electrode wire, and the first clamping plate and the second clamping plate are respectively close to the clamping ends of the first electrode wire and the second electrode wire, and A driving assembly is arranged in the accommodating cavity and connects the first clamping plate and the second clamping plate. The driving assembly drives the first clamping plate and the second clamping plate to move toward and away from each other, so that the clamping ends of the first electrode wire and the second electrode wire move toward each other.

2. The bipolar ablation electrode according to claim 1, characterized in that: The handle mechanism also includes an operating button arranged on the handle, and the driving assembly includes an operating slider, an operating rod, a first clamping link and a second clamping link. The operating slider is movably arranged in the accommodating cavity and is controllably connected to the operating button. The operating rod is fixed to the operating slider and extends to the opening of the outer sheath tube through the channel. Both ends of the first clamping link are rotatably connected to the operating rod and the first clamping plate, and both ends of the second clamping link are rotatably connected to the operating rod and the second clamping plate.

3. The bipolar ablation electrode according to claim 2, characterized in that: A protrusion is arranged on the side wall of the operating slider, and the protrusion forms an inclined guide surface. A bump facing the protrusion is formed on the operating button, and the bump acts on the guide surface and drives the operating slider to move in a direction away from the outer sheath tube through the guide surface.

4. The bipolar ablation electrode according to claim 2, characterized in that: The driving assembly further comprises a return spring, and the return spring is pressed between the operating slider and the inner wall of the handle on the side away from the outer sheath tube.

5. The bipolar ablation electrode according to claim 2, characterized in that: The operating slider is formed with a through hole for the first electrode wire and the second electrode wire to pass through, and the through hole is coaxial with the channel.

6. The bipolar ablation electrode according to claim 5, characterized in that: The aperture of the through hole is larger than the outer diameter of the outer sheath tube.

7. The bipolar ablation electrode according to claim 2, characterized in that: A first limiting groove and a second limiting groove are arranged on the inner wall of the outer sheath tube, and the operating rod moves along the extending direction of the first limiting groove and the second limiting groove.

8. The bipolar ablation electrode according to claim 2, characterized in that: A window communicating with the accommodating cavity is provided on the side wall of the handle, and the operating button extends to the accommodating cavity through the window. One end of the operating button is rotatably arranged on the side wall of the handle, and a hook is formed on the other end. The hook is located in the accommodating cavity and abuts against the inner wall of the handle when the operating button rotates out of the accommodating cavity.

9. The bipolar ablation electrode according to claim 7, characterized in that: The operation buttons include a first operation button and a second operation button which are arranged opposite to each other on two sides of the handle.

10. The bipolar ablation electrode according to claim 1, characterized in that: The first electrode wire and the second electrode wire are respectively sheathed with insulating tubes, and the clamping ends of the first electrode wire and the second electrode wire are exposed from the insulating tubes, and / or the clamping ends of the first electrode wire and the second electrode wire are respectively formed with tweezer tips.

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