Ablation electrode

Abstract

The utility model discloses an ablation electrode which comprises a handle assembly and an electrode wire. The handle assembly comprises a handle main body, an adjustable operation handle and an outer sheath tube which are axially connected, the outer sheath tube is fixed to the adjustable operation handle, the outer sheath tube extends in the direction away from the handle main body, and the adjustable operation handle can move in the axial direction relative to the handle main body; the electrode wires comprise a first electrode wire and a second electrode wire which are arranged in parallel, the first electrode wire and the second electrode wire are fixed to the handle body, one ends of the first electrode wire and the second electrode wire penetrate through the adjustable operation handle and the outer sheath tube and extend out of the outer sheath tube, and clamping parts are formed at the ends, exposed out of the outer sheath tube, of the first electrode wire and the second electrode wire correspondingly; when the adjustable operation handle moves in the axial direction of the handle body, the outer sheath tube drives the clamping part of the first electrode wire and the clamping part of the second electrode wire to be close to or away from each other. According to the ablation electrode, the clamping action of the tail end of the electrode wire is controlled through movement of the adjustable operation handle instead of button operation, and stability is higher.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly to an ablation electrode with a variable working length. Background Art

[0002] An ablation electrode is an electrical stimulation device used to achieve tissue ablation. By delivering high-frequency alternating current into the tissue, heat energy is generated to cause tissue necrosis, thereby achieving the treatment purpose.

[0003] In the field of surgical operations, surgeons need to be extremely careful when grasping materials in the surgical area, especially in neurosurgery. Surgeons often need to move nerves or other sensitive materials. In spinal surgery, such grasping may also be related to repairing a herniated disc.

[0004] When using an ablation electrode to grasp materials in the back and provide electro-surgical current to these materials, surgeons need to be extremely careful because after grasping, when applying electro-surgical current, only the desired materials need to be grasped. Failing to accurately grasp the correct materials may cause damage to the surrounding nerves and the patient, especially when using electro-surgical current.

[0005] The commonly used ablation electrodes in the prior art are button-operated. In actual operation, the movement of the tweezers may be accompanied by their actuation, or the movement of the surgeon's hand may interfere with accurate grasping. Therefore, how to improve the stability during operation has become an urgent problem to be solved in this field.

[0006] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide an ablation electrode for improving the stability during operation.

[0008] To achieve the above object, the present utility model provides an ablation electrode, which includes a handle assembly and an electrode wire. The handle assembly includes a handle body, an adjustable operating handle axially connected thereto, and an outer sheath tube fixed to the adjustable operating handle. The outer sheath tube extends in a direction away from the handle body, and the adjustable operating handle can axially move relative to the handle body; the electrode wire includes a first electrode wire and a second electrode wire arranged in parallel. The first electrode wire and the second electrode wire are fixed to the handle body, and one end thereof passes through the adjustable operating handle and the outer sheath tube and extends outside the outer sheath tube. Clamping portions are respectively formed at the ends of the first electrode wire and the second electrode wire exposed outside the outer sheath tube; wherein when the adjustable operating handle axially moves along the handle body, the outer sheath tube drives the clamping portions of the first electrode wire and the clamping portions of the second electrode wire to approach or separate from each other.

[0009] In one or more embodiments, the clamping portions of the first electrode wire and the second electrode wire respectively include a first portion close to the outer sheath tube and a second portion far from the outer sheath tube. The distance between the first portions of the clamping portions of the first electrode wire and the second electrode wire gradually increases in a direction away from the outer sheath tube, and the distance between the second portions of the clamping portions of the first electrode wire and the second electrode wire gradually decreases in a direction away from the first portion.

[0010] In one or more embodiments, an arc-shaped contact surface is provided at one end of the outer sheath tube away from the adjustable operating handle, and the contact surface acts on the first portions of the clamping portions of the first electrode wire and the second electrode wire.

[0011] In one or more embodiments, the adjustable operating handle and the handle body are threadedly connected.

[0012] In one or more embodiments, the threads on the adjustable operating handle and the handle body are self-locking threads.

[0013] In one or more embodiments, an electrode fixing seat is arranged inside the adjustable operating handle, and the outer sheath tube is fixed to the electrode fixing seat.

[0014] In one or more embodiments, the electrode fixing seat is detachably fixed to the adjustable operating handle.

[0015] In one or more embodiments, a first channel is axially provided on the handle body, a second channel is provided on the electrode fixing seat, and the first channel, the second channel and the outer sheath tube are axially communicated.

[0016] In one or more embodiments, insulating sleeves are respectively sleeved outside the first electrode wire and the second electrode wire.

[0017] In one or more embodiments, an insulating layer is further disposed between the insulating sleeves of the first electrode wire and the second electrode wire.

[0018] Compared with the prior art, the ablation electrode according to the present invention can effectively avoid actuation caused by hand movements and has higher stability by using an adjustable operating handle to move instead of button operation to drive the ends of the electrode wires to approach each other to complete the clamping of the human target part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of an ablation electrode according to an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of a part of the handle assembly according to an embodiment of the present invention;

[0021] Figure 3 is a partial enlarged view of the ablation electrode according to an embodiment of the present invention.

[0022] MAIN REFERENCE NUMERALS DESCRIPTION:

[0023] 100 - ablation electrode, 10 - handle assembly, 11 - handle body, 111 - first channel, 12 - adjustable operating handle, 13 - outer sheath tube, 131 - contact surface, 14 - electrode fixing seat, 141 - second channel, 20 - electrode wire, 21 - first electrode wire, 211 - first part, 212 - second part, 22 - second electrode wire, 221 - first part, 212 - second part, 23 - insulating sleeve, 24 - insulating layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

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

[0026] As Figures 1 to 3As shown, the ablation electrode 100 according to an embodiment of the present utility model includes a handle assembly 10 and an electrode wire 20. The handle assembly 10 includes a handle body 11, an adjustable operating handle 12, and an outer sheath tube 13. The handle body 11 and the adjustable operating handle 12 are axially connected, and the adjustable operating handle 12 can move axially closer to or away from the handle body 11. The outer sheath tube 13 is fixed to the adjustable operating handle 12 and extends in a direction away from the handle body 11. The electrode wire 20 includes a first electrode wire 21 and a second electrode wire 22 arranged in parallel. Both are fixed to the handle body 11 and one end passes through the adjustable operating handle 12 and the outer sheath tube 13 and extends outside the outer sheath tube 13. The ends of the first electrode wire 21 and the second electrode wire 22 exposed outside the outer sheath tube 13 are the clamping parts that actually act on the human target part (such as Figure 3 as shown). Therefore, when the adjustable operating handle 12 moves in a direction away from the handle body 11, the end of the outer sheath tube 13 acts on the clamping part to drive them closer to each other, completing the clamping of the human target part.

[0027] In the ablation electrode 100 of this embodiment, by setting the handle into two parts that can approach and separate from each other, and indirectly controlling the clamping parts of the electrode wire 20 to approach each other by operating the adjustable operating handle 12, compared with the traditional button operation mode, it can prevent the subtle movements of the hand from affecting the clamping process, and has higher stability.

[0028] Specifically, the clamping parts of the first electrode wire 21 exposed outside its insulating sleeve 23 and the outer sheath tube 13 are two parts, namely a first part 211 and a second part 212. The clamping parts of the second electrode wire 22 exposed outside its insulating sleeve 23 and the outer sheath tube 13 are also divided into two parts, namely a first part 221 and a second part 222. As Figure 3 shown, the distance between the first parts of the two electrode wires gradually increases along the extension direction of the outer sheath tube 13, while the distance between the second parts gradually decreases. Therefore, the first parts of the two electrode wires can provide an inclined guiding surface. The outer sheath tube 13 abuts against the first part during the movement, and then moves along the guiding surface and squeezes the first parts of the two electrode wires while making the second parts approach each other to complete the clamping of the human target part.

[0029] Preferably, the second part 212 of the first electrode wire 21 and the second part 222 of the second electrode wire 22 are finally in a parallel state after approaching each other, so as to avoid pinching the human body part during the clamping process.

[0030] At the same time, an arc-shaped contact surface 131 is provided at the end of the outer sheath tube 13. Therefore, the outer sheath tube 13 can fit more closely to the surfaces of the two electrode wires, avoiding the contact surface being too sharp and scratching the electrode wires.

[0031] Specifically, the adjustable operating handle 12 is threadedly connected to the handle body 11. By rotating the adjustable operating handle 12, its axial movement is controlled. Therefore, the control process is more delicate. The adjustment of the distance between the clamping parts is stepless adjustment, and it can be more easily adjusted to a reasonable clamping distance to meet the operating requirements of different parts of the human body.

[0032] In addition to the rotation speed of the adjustable operating handle 12, the changing process of the distance between the clamping parts also depends on the density of the thread. Under the same thread length, the denser the thread is set, the smaller the distance that the adjustable operating handle 12 advances or retreats in one turn, and the smaller the change in the distance between the clamping parts; on the contrary, the sparser the thread is set, the larger the distance that the adjustable operating handle 12 advances or retreats in one turn, and the larger the change in the distance between the clamping parts. Therefore, relatively dense threads can be set on the handle body 11 and the adjustable operating handle 12 to make the adjustment between the clamping parts more delicate.

[0033] Furthermore, the thread between the adjustable operating handle 12 and the handle body 11 adopts a standard self-locking thread form. Specifically, the bottom of the thread on one side is set as a wedge-shaped inclined plane with a certain angle. When the adjustable operating handle 12 and the handle body 11 are tightened together, the tip of the thread on the other side tightly abuts against this wedge-shaped surface, thereby generating a large locking force. Due to the change in the angle of the tooth profile, the normal pressure between the threads is much greater than the fastening pressure. Therefore, the anti-loosening friction force generated is greatly increased, achieving self-locking. Without applying an additional acting force, the two will not move abnormally, and the stability is higher.

[0034] As Figure 2 shown, an electrode fixing seat 14 is also arranged inside the adjustable operating handle 12. After the outer sheath tube 13 is fixed on the electrode fixing seat 14, it is then fixed on the adjustable operating handle 12. An opening is made at the end of the adjustable operating handle 12, and the outer sheath tube 13 extends out through the opening.

[0035] Furthermore, the electrode fixing seat 14 and the adjustable operating handle 12 are detachably fixed. Therefore, the handle assembly 10 is divided into several parts, which are produced separately and then completed through assembly. The production cost is lower, which is convenient for large-scale production and assembly. Preferably, the handle body 11 can be designed to be assembled by two completely identical parts, and the adjustable operating handle 12 is the same, which is more convenient for medical staff to assemble.

[0036] As Figure 2As shown, a first axial channel 111 is formed inside the handle body 11, and a second channel 141 is provided inside the electrode fixing base 14. The two channels are axially connected to the inner channel of the outer sheath tube 13. Therefore, the two electrode wires can directly extend into the first channel 111 and be connected to the rear-end power supply assembly inside the first channel. Thus, it will not affect the service life of the electrode wires. At the same time, the entire first electrode wire 21 and the second electrode wire 22 will not be bent, and situations such as breakage caused by bending can be avoided.

[0037] Preferably, to prevent the two electrode wires from abnormally touching and causing a short circuit, insulating sleeves 23 are respectively arranged outside the first electrode wire 21 and the second electrode wire 22. And to further improve the insulation performance, an insulating layer 24 is also arranged between the two insulating sleeves 23, which is mainly formed by the solidification of insulating glue to prevent a short circuit from occurring in the case of damage to the insulating sleeve 23. Therefore, by setting two insulating structures, the insulation performance of the electrode wire 20 is greatly improved.

[0038] Next, in combination with specific usage scenarios, the ablation electrode 100 provided by the present invention will be further described.

[0039] When assembling the ablation electrode 100, first, the first electrode wire 21 and the second electrode wire 22 are respectively inserted into their corresponding insulating tubes 23, then they are assembled together into the outer sheath tube 13, and then inserted into the upper end of the electrode fixing base 14 and glued to fix the outer sheath tube 13 and the electrode fixing base 14. An insulating layer 24 made of insulating glue is inserted between the two electrode wires to strengthen the insulation between the two electrode wires. After fixing the electrode fixing base 14 to the adjustable operating handle 12, the first electrode wire 21 and the second electrode wire 22 are connected to the rear-end socket, and finally the adjustable operating handle 12 is connected to the handle body 11. The connection method is a threaded connection, and a standard self-locking thread structure is adopted.

[0040] Since the outer sheath tube 13 and the adjustable operating handle 12 are detachably fixed, in usage scenarios that require different lengths, the outer sheath tube 13 and the electrode wire 20 with different lengths can be quickly replaced to meet the surgical requirements.

[0041] When operating the ablation electrode 100, after approaching the target part of the human body, by rotating the adjustable operating handle 12 clockwise, the adjustable operating handle 12 drives the outer sheath tube 13 to move upward synchronously. During the upward movement, the end of the outer sheath tube 13 acts on the clamping part structure at the ends of the first electrode wire 21 and the second electrode wire 22, and drives the ends of the electrode wires to approach each other, realizing the clamping of the human tissue at the target part. At the same time, since a standard self-locking thread structure is adopted between the adjustable operating handle 12 and the handle body 11, the ablation electrode 100 can remain in this state after rotating a certain number of turns and will not rotate automatically without manual intervention, with relatively high stability. Then, power is applied to remove the human tissue. After the removal is completed, the adjustable operating handle 100 is rotated counterclockwise, the outer sheath tube 13 moves backward, and the clamping parts at the ends of the first electrode wire 21 and the second electrode wire 22 move away from each other under the action of their own elastic forces after losing support, and the clamping state of the electrode wires is released and separated from the human target part.

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

Claims

1. An ablation electrode, characterized in that: include: A handle assembly, comprising an axially connected handle body, an adjustable operating handle and an outer sheath tube fixed to the adjustable operating handle, the outer sheath tube extending in a direction away from the handle body, and the adjustable operating handle can move axially relative to the handle body; and The electrode wire comprises a first electrode wire and a second electrode wire arranged in parallel, the first electrode wire and the second electrode wire are fixed to the handle body, and one end of the first electrode wire and the second electrode wire pass through the adjustable operating handle and the outer sheath tube and extend outside the outer sheath tube, and one end of the first electrode wire and the second electrode wire exposed from the outer sheath tube are respectively formed with a clamping portion, When the adjustable operating handle moves along the axial direction of the handle body, the outer sheath tube drives the clamping portion of the first electrode wire and the clamping portion of the second electrode wire to move closer to or farther from each other.

2. The ablation electrode according to claim 1, characterized in that: The clamping portion of the first electrode wire and the clamping portion of the second electrode wire respectively include a first portion close to the outer sheath tube and a second portion away from the outer sheath tube. The distance between the clamping portion of the first electrode wire and the first portion of the clamping portion of the second electrode wire gradually increases in a direction away from the outer sheath tube, and the distance between the second portions of the clamping portion of the first electrode wire and the second electrode wire gradually decreases in a direction away from the first portion.

3. The ablation electrode according to claim 2, characterized in that: An arc-shaped contact surface is arranged at one end of the outer sheath tube away from the adjustable operating handle, and the contact surface acts on the first electrode wire and the first part of the second electrode wire clamping part.

4. The ablation electrode according to claim 1, characterized in that: The adjustable operating handle is threadedly connected to the handle body.

5. The ablation electrode according to claim 4, characterized in that: The threads on the adjustable operating handle and the handle body are self-locking threads.

6. The ablation electrode according to claim 1, characterized in that: An electrode fixing seat is arranged in the adjustable operating handle, and the outer sheath is fixed to the electrode fixing seat.

7. The ablation electrode according to claim 6, characterized in that: The electrode fixing seat and the adjustable operating handle are detachably fixed.

8. The ablation electrode according to claim 6, characterized in that: The handle body is provided with a first channel along its axial direction, and the electrode fixing seat is provided with a second channel. The first channel, the second channel and the outer sheath are axially connected.

9. The ablation electrode according to claim 1, characterized in that: The first electrode wire and the second electrode wire are respectively covered with insulating sleeves.

10. The ablation electrode according to claim 9, characterized in that: An insulating layer is further provided between the insulating sleeves of the first electrode wire and the second electrode wire.

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