Plasma electrode

Abstract

The utility model discloses a kind of plasma electrodes, including handle and insulating outer tube, one end of insulating outer tube is fixedly connected with handle, the other end of insulating outer tube is fixed with end head component, electrode wire and electrode core passageway are provided on end head component, electrode core is movably installed in electrode core passageway, fixed terminal block is equipped with positive terminal post and negative terminal post on moving terminal block and fixed terminal block, moving terminal block has first working position and second working position, when moving terminal block is located first working position, positive terminal post and negative terminal post are powered for electrode core, when moving terminal block is located second working position, positive terminal post and negative terminal post are powered for electrode wire, one end of electrode core is fixedly connected with moving terminal block.The utility model has temperature control and defoaming function, and has double electrode, can realize intravertebral integrated operation, improve surgical efficiency.

Description

Technical Field

[0001] This utility model relates to a plasma electrode, and more particularly to a plasma electrode. Background Technology

[0002] In minimally invasive spinal surgery, the need to frequently change specialized instruments for intraspinal (such as nucleus pulposus tissue treatment) and extraspinal (such as paraspinal soft tissue treatment) procedures increases the average operation time by 20-30 minutes. Furthermore, instrument changes can easily lead to the risk of visual exposure and directly increase patient costs. Currently, there is no integrated solution that can take into account both intraspinal and extraspinal procedures.

[0003] Meanwhile, the high temperatures generated by plasma ablation can reach 80℃-120℃, easily causing thermal damage to nerves and blood vessels. Current plasma electrodes do not have temperature monitoring capabilities. In addition, the generated bubbles can obstruct the surgical field of vision, increasing the incidence of complications such as dural sac tearing, bleeding, and intracranial pneumocephalus. Currently, auxiliary suction devices are used to remove bubbles during surgery, which increases the complexity of the procedure. Utility Model Content

[0004] The purpose of this invention is to provide a plasma electrode to solve the technical problems in the prior art. It has temperature control and defoaming functions, and has dual electrodes, enabling integrated operation inside and outside the spinal canal and improving surgical efficiency.

[0005] This utility model provides a plasma electrode, including a handle and an insulating outer tube. One end of the insulating outer tube is fixedly connected to the handle, and the other end of the insulating outer tube is fixedly provided with an end assembly. The end assembly has an electrode wire and an electrode core channel. An electrode core is movably installed in the electrode core channel. The handle is provided with a movable terminal block and a fixed terminal block. The fixed terminal block is fixedly provided with a positive terminal and a negative terminal. The movable terminal block has a first working position and a second working position. When the movable terminal block is in the first working position, the positive terminal and the negative terminal block supply power to the electrode core. When the movable terminal block is in the second working position, the positive terminal and the negative terminal block supply power to the electrode wire. One end of the electrode core is fixedly connected to the movable terminal block.

[0006] In the aforementioned plasma electrode, preferably, the end assembly includes a ceramic base and an electrode disk, the electrode core channel is disposed within the ceramic base, the ceramic base is also provided with an attraction channel, one end of the ceramic base is fixedly connected to the end of the insulating outer tube, and the electrode disk is embedded at the other end of the ceramic base.

[0007] In the aforementioned plasma electrode, preferably, the electrode disk is provided with a plurality of suction holes, the suction holes are connected to one end of the suction channel, the other end of the suction channel is fixedly connected to one end of the suction tube, and the other end of the suction tube passes through the insulating outer tube and the handle and is fixedly connected to the suction tube connector.

[0008] In the aforementioned plasma electrode, preferably, the movable terminal block is movably installed inside the handle. A first positive electrode connecting tube and a first negative electrode connecting tube are fixedly disposed at one end of the movable terminal block near the insulating outer tube, and a second positive electrode connecting tube and a second negative electrode connecting tube are fixedly disposed at the other end of the movable terminal block away from the insulating outer tube. A receiving groove is formed at the bottom of the movable terminal block. The fixed terminal block is fixed to the inner wall of the handle and is located within the receiving groove. The first positive electrode connecting tube, the positive electrode terminal, and the second positive electrode connecting tube are coaxially arranged, as are the first negative electrode connecting tube, the negative electrode terminal, and the second negative electrode connecting tube.

[0009] In the aforementioned plasma electrode, preferably, there are two electrode wires, which are fixed on the electrode disk and electrically connected to the second positive electrode connecting tube and the second negative electrode connecting tube via wires.

[0010] In the aforementioned plasma electrode, preferably, the electrode core includes an electrode core tube body, an electrode core positive electrode, an electrode core negative electrode, and an insulating partition. The electrode core positive electrode, the electrode core negative electrode, and the insulating partition are all fixed at one end of the electrode core tube body. The insulating partition is located between the electrode core positive electrode and the electrode core negative electrode. The electrode core positive electrode is electrically connected to the first positive electrode connecting tube through a wire, and the electrode core negative electrode is electrically connected to the first negative electrode connecting tube through a wire.

[0011] In the aforementioned plasma electrode, preferably, two temperature-sensing optical fibers are provided inside the insulating outer tube. One end of the two temperature-sensing optical fibers passes through the ceramic base and the electrode disk, and this end of the two temperature-sensing optical fibers is fixedly connected to the electrode disk. The other end of the two temperature-sensing optical fibers passes through the handle and is connected to the connection terminal.

[0012] In the aforementioned plasma electrode, preferably, a self-locking mechanism is fixedly provided on the inner wall of the handle, and a pressing rod connecting seat is fixedly provided on the outer wall of the movable terminal block. One end of the pressing rod connecting seat is fixedly provided with a self-locking latch, and the other end of the pressing rod connecting seat is fixedly provided with a spring. The pressing rod consists of a first round rod, a second round rod, and a pressing cap that are fixedly connected in sequence. The diameter of the first round rod is smaller than the diameter of the second round rod. The spring is sleeved on the first round rod, and one end of the spring is fixedly connected to the end face of the second round rod.

[0013] Compared with existing technologies, this invention features an electrode core and electrode wire. When the movable connector is in the second working position, the electrode core is retracted into the end assembly, and the connection circuit between the electrode core and the positive and negative terminals is disconnected. In this state, extraspinal procedures can be performed, such as treatment of paraspinal soft tissue. When intraspinal procedures are required, the movable connector is moved to the first working position. At this point, the connection circuit between the positive and negative terminals and the electrode wire is disconnected, and the connection circuit between the electrode core and the electrode core is connected, providing power to the electrode core. The electrode core then extends from the end assembly, allowing intraspinal procedures such as treatment of the nucleus pulposus. Using this invention eliminates the need to change instruments during intraspinal and extraspinal procedures, improving surgical efficiency, reducing the risk of visual field exposure during instrument changes, and lowering patient costs. Attached Figure Description

[0014] Figure 1 This is an isometric drawing of this utility model;

[0015] Figure 2 This is a utility model Figure 1 Enlarged view of part A in the image;

[0016] Figure 3 This is an isometric view of the electrode core of this utility model in the extended state;

[0017] Figure 4 This is a utility model Figure 3 Enlarged view of part B in the image;

[0018] Figure 5 This is a schematic diagram of the internal structure of the handle when the movable connector of this utility model is in the first working position;

[0019] Figure 6 This is a schematic diagram of the internal structure of the handle when the movable connector of this utility model is in the second working position;

[0020] Figure 7 This is a top view of the movable terminal block and the fixed terminal block of this utility model;

[0021] Figure 8 This is a cross-sectional view of the end of the insulating outer tube, the ceramic seat, and the electrode disk of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Handle; 2. Insulating outer tube; 3. Electrode wire; 4. Electrode core channel; 5. Movable terminal block; 6. Fixed terminal block; 7. Positive terminal; 8. Negative terminal; 9. Ceramic base; 10. Electrode disc; 11. Suction channel; 12. Suction hole; 13. Suction tube connector; 14. First positive terminal connecting tube; 15. First negative terminal connecting tube; 16. Second positive terminal connecting tube; 17. Second negative terminal connecting tube; 18. Receiving groove; 19. Electrode core positive electrode; 20. Electrode core negative electrode; 21. Insulating partition; 22. Temperature sensing fiber optic; 23. Connecting terminal; 24. Press self-locking device lock body; 25. Press rod connecting seat; 26. Press self-locking device lock tongue; 27. Spring; 28. First round rod; 29. ​​Second round rod; 30. Press cap; 31. Electrode core tube body; 32. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] Embodiments of this utility model: such as Figures 1-8 As shown, a plasma electrode includes a handle 1 and an insulating outer tube 2. One end of the insulating outer tube 2 is fixedly connected to the handle 1, and the other end of the insulating outer tube 2 is fixedly provided with an end assembly. The end assembly has an electrode wire 3 and an electrode core channel 4. An electrode core is movably installed in the electrode core channel 4. The handle 1 is provided with a movable terminal block 5 and a fixed terminal block 6. The fixed terminal block 6 is fixedly provided with a positive terminal 7 and a negative terminal 8. The movable terminal block 5 has a first working position and a second working position. When the movable terminal block 5 is in the first working position, the positive terminal 7 and the negative terminal 8 supply power to the electrode core. When the movable terminal block 5 is in the second working position, the positive terminal 7 and the negative terminal 8 supply power to the electrode wire 3. One end of the electrode core is fixedly connected to the movable terminal block 5.

[0025] The insulating outer tube 2 is made of medical-grade polyether ether ketone (PEEK) with an outer diameter of 3.5 mm to 5 mm. It provides overall insulation protection for the internal components to prevent accidental electrical damage to normal tissues during surgery. It should be noted that the insulating outer tube 2 can be a straight tube or a slightly upturned end.

[0026] The handle 1 is made of hard plastic, such as polyethylene (PE) or polypropylene (PP). The handle 1 has a limiting structure for the movable terminal block 5 (the limiting structure is not shown in the figure, but can be implemented by those skilled in the art using conventional means). Under the action of the limiting structure, the movable terminal block 5 can only move along the axial direction of the handle 1 within the handle 1, thereby moving between the first working position and the second working position.

[0027] There are two electrode wires 3. Electrode wire 3 is the extraspinal plasma generating end, which can output 5 W-15 W of power for ablation and vaporization of soft tissue outside the spinal canal.

[0028] When not in use, the electrode core is retracted into the end assembly. When the electrode core is in use, it extends out from the end assembly. The positive terminal 7 and the negative terminal 8 supply power to the electrode core. The end output power of the electrode core is 3 W-8 W, which is used for ablation and hemostasis of tissues in the spinal canal (such as the nucleus pulposus).

[0029] This product can be used for both intraspinal and extraspinal procedures without the need to change instruments, thus improving surgical efficiency, reducing surgical risks, and increasing the success rate of surgery.

[0030] Specifically, the end assembly includes a ceramic seat 9 and an electrode disk 10. The electrode core channel 4 is disposed inside the ceramic seat 9. An attraction channel 11 is also disposed inside the ceramic seat 9. One end of the ceramic seat 9 is fixedly connected to the end of the insulating outer tube 2, and the electrode disk 10 is embedded in the other end of the ceramic seat 9.

[0031] The ceramic base 9 is made of alumina ceramic and is fixed to the front end of the insulating outer tube 2 to provide insulation and can withstand temperatures of ≥200℃.

[0032] The electrode disk 10 is used to fix the electrode wire 3 and position the electrode core. The electrode disk 10 can withstand high temperatures and has multiple suction holes 12. The suction holes 12 are connected to one end of the suction channel 11, and the other end of the suction channel 11 is fixedly connected to one end of the suction tube 13. The other end of the suction tube 13 passes through the insulating outer tube 2 and the handle 1 and is fixedly connected to the suction tube connector 14. The electrode disk 10 has a recess for avoiding the electrode core.

[0033] To improve the suction effect, this embodiment has four suction holes 12, including one circular hole and three arc-shaped holes, with the three arc-shaped holes evenly distributed around the circular hole. The suction tube connector 14 is connected to a negative pressure device, which is an existing device and is not shown in the figure. The suction tube connector 14 is a conical connector, and its outer wall has anti-slip protrusions. When the negative pressure device is activated, it generates a negative pressure of -0.02 MPa to -0.05 MPa at the suction hole 12, continuously adsorbing the plasma generated by the plasma reaction. bubbles and The flow rate of the bubbles is controlled at 10 ml / min-15 ml / min.

[0034] Furthermore, the movable terminal block 5 is movably installed inside the handle 1. The end of the movable terminal block 5 near the insulating outer tube 2 is fixed with a first positive terminal connecting tube 15 and a first negative terminal connecting tube 16. The end of the movable terminal block 5 away from the insulating outer tube 2 is fixed with a second positive terminal connecting tube 17 and a second negative terminal connecting tube 18. The bottom of the movable terminal block 5 is provided with a receiving groove 19. The fixed terminal block 6 is fixed on the inner wall of the handle 1 and is located in the receiving groove 19. The first positive terminal connecting tube 15, the positive terminal 7 and the second positive terminal connecting tube 17 are coaxially arranged. The first negative terminal connecting tube 16, the negative terminal 8 and the second negative terminal connecting tube 18 are coaxially arranged.

[0035] The fixed terminal block 6 is fixed to the inner wall of the handle 1 and will not shift. The width of the outer walls on both sides of the fixed terminal block 6 is equal to the width of the receiving groove 19 on the movable terminal block 5. This design further restricts the movement direction of the movable terminal block 5. The positive terminal 7 and the negative terminal 8 are arranged side by side and parallel to each other. Both the positive terminal 7 and the negative terminal 8 are parallel to the axis of the handle 1. Both ends of the positive terminal 7 and the negative terminal 8 extend out of the front and rear side walls of the fixed terminal block 6, respectively. The side wall closer to the first positive connecting tube 15 is the front side wall, and the side wall opposite to the front side wall is the rear side wall. The positive terminal 7 and the negative terminal 8 are connected to the connecting terminal 24 through wires.

[0036] Preferably, the first positive terminal connecting tube 15 and the second positive terminal connecting tube 17, the first negative terminal connecting tube 16 and the second negative terminal connecting tube 18 are all flared at one end inside the movable terminal block 5, which can ensure effective connection with the positive terminal block 7 and the negative terminal block 8 and prevent ineffective connection due to misalignment.

[0037] There are two electrode wires 3, which are fixed on the electrode disk 10. Both electrode wires 3 are electrically connected to the second positive electrode connecting tube 17 and the second negative electrode connecting tube 18 through wires.

[0038] Furthermore, the electrode core includes an electrode core tube 32, an electrode core positive electrode 20, an electrode core negative electrode 21, and an insulating partition 22. The electrode core positive electrode 20, the electrode core negative electrode 21, and the insulating partition 22 are all fixed at one end of the electrode core tube 32. The insulating partition 22 is located between the electrode core positive electrode 20 and the electrode core negative electrode 21. The electrode core positive electrode 20 is electrically connected to the first positive electrode connecting tube 15 through a wire, and the electrode core negative electrode 21 is electrically connected to the first negative electrode connecting tube 16 through a wire.

[0039] The electrode core tube 32 is made of insulating material. Both the positive electrode 20 and the negative electrode 21 are made of tungsten alloy. The positive electrode 20, the negative electrode 21, and the insulating partition 22 together form a cylindrical structure with a preferred diameter of 0.8 mm. Of course, those skilled in the art can design it to other sizes according to their needs.

[0040] Furthermore, the insulating outer tube 2 is provided with two temperature-sensing optical fibers 23. One end of the two temperature-sensing optical fibers 23 passes through the ceramic base 9 and the electrode disk 10, and this end of the two temperature-sensing optical fibers 23 is fixedly connected to the electrode disk 10. The other end of the two temperature-sensing optical fibers 23 passes through the handle 1 and is connected to the connection terminal 24.

[0041] The temperature-sensing fiber optic cable 23 is available for purchase. Made of quartz, it collects temperature signals from the surgical area in real time based on the 850nm infrared band, with a detection temperature range of 20℃-150℃ and a response time of ≤0.5s.

[0042] The temperature-sensing fiber optic cable 23 can transmit temperature data to the plasma host in real time. When the detected temperature is ≥70℃, the plasma host will automatically reduce the power by ≥50% or shut down to prevent overheating damage.

[0043] Furthermore, a self-locking mechanism lock body 25 is fixedly provided on the inner wall of the handle 1, and a pressing rod connecting seat 26 is fixedly provided on the outer wall of the movable wiring terminal 5. A self-locking mechanism lock tongue 27 is fixedly provided at one end of the pressing rod connecting seat 26, and a spring 28 is fixedly provided at the other end of the pressing rod connecting seat 26. The pressing rod is composed of a first round rod 29, a second round rod 30 and a pressing cap 31 that are fixedly connected in sequence. The diameter of the first round rod 29 is smaller than the diameter of the second round rod 30. The spring 28 is sleeved on the first round rod 29, and one end of the spring 28 is fixedly connected to the end face of the second round rod 30.

[0044] The self-locking device lock body 25 and the self-locking device latch 27 are existing products and can be purchased. This embodiment will not elaborate on the internal structure and working principle of the self-locking device lock body 25. By pushing the pressing rod to move the pressing rod connecting seat 26, the self-locking device latch 27 is inserted into the self-locking device lock body 25, locking the self-locking device lock body 25 with the latch 27. At this time, the movable terminal block 5 is in the first working position. Again, by pushing the pressing rod to move the pressing rod connecting seat 26, the self-locking device latch 27 pushes against the self-locking device lock body 25, releasing the self-locking device latch 27. Pulling the pressing cap 31 moves the movable terminal block 5 to the second working position.

[0045] The working principle of this utility model is as follows: During use, the connecting terminal 24 is connected to the plasma host. This product is compatible with most models of plasma hosts on the market, such as Medtronic and Smith & Nephew. The suction tube connector 14 is connected to the negative pressure device, which can be any negative pressure device on the market. During surgery, the plasma host and negative pressure device are activated. The end head is then placed at the surgical site for extraspinal treatment. The pressing cap 31 is pulled, moving the movable connector 5 to the second working position. At this time, the positive terminal 7 is connected to the second positive terminal connecting tube 17, and the negative terminal 8 is connected to the second negative terminal connecting tube 18. The two electrode wires 3 are working, ablating and vaporizing the soft tissue outside the spinal canal. During operation, the suction hole 12 generates negative pressure and continuously adsorbs the plasma reaction products. bubbles and Air bubbles are removed, with an air bubble removal rate of ≥95%, improving the surgical field of vision.

[0046] When treatment is needed within the spinal canal, simply push the pressing cap 31, move the movable connector 5 to the first working position, and push the end of the electrode core out of the ceramic seat 9. The positive terminal 7 is then connected to the first positive connecting tube 15, and the negative terminal 8 is connected to the first negative connecting tube 16. The pressing self-locking device's locking tongue 27 is locked by the pressing self-locking device's locking body 25, keeping the movable connector 5 in the first working position. At this time, precise ablation of the nucleus pulposus tissue can be achieved through the positive electrode 20 and the negative electrode 21.

[0047] During the procedure, the temperature-sensing fiber optic cable 23 transmits temperature data to the plasma host in real time. When the detected temperature is ≥70℃, the plasma host automatically reduces the power by ≥50% or shuts down to prevent overheating damage. When the temperature is below 65℃, the power is restored to normal.

[0048] Using this product can shorten a single surgery by 15-25 minutes compared to using traditional instruments, and reduce the overall surgical cost for patients by 20%-30%, effectively alleviating the economic burden on patients while improving the quality of surgery.

[0049] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A plasma electrode, comprising a handle (1) and an insulating outer tube (2), characterized in that: One end of the insulating outer tube (2) is fixedly connected to the handle (1), and the other end of the insulating outer tube (2) is fixedly provided with an end assembly. The end assembly has an electrode wire (3) and an electrode core channel (4). An electrode core is movably installed in the electrode core channel (4). The handle (1) is provided with a movable terminal block (5) and a fixed terminal block (6). A positive terminal (7) and a negative terminal (8) are fixedly provided on the fixed terminal block (6). The movable terminal block (5) has a first working position and a second working position. When the movable terminal block (5) is in the first working position, the positive terminal (7) and the negative terminal (8) supply power to the electrode core. When the movable terminal block (5) is in the second working position, the positive terminal (7) and the negative terminal (8) supply power to the electrode wire (3). One end of the electrode core is fixedly connected to the movable terminal block (5).

2. The plasma electrode according to claim 1, characterized in that: The end assembly includes a ceramic seat (9) and an electrode disk (10). The electrode core channel (4) is disposed in the ceramic seat (9). The ceramic seat (9) is also provided with an attraction channel (11). One end of the ceramic seat (9) is fixedly connected to the end of the insulating outer tube (2). The electrode disk (10) is embedded in the other end of the ceramic seat (9).

3. The plasma electrode according to claim 2, characterized in that: The electrode plate (10) is provided with a plurality of suction holes (12). The suction holes (12) are connected to one end of the suction channel (11). The other end of the suction channel (11) is fixedly connected to one end of the suction tube (13). The other end of the suction tube (13) passes through the insulating outer tube (2) and the handle (1) and is fixedly connected to the suction tube connector (14).

4. The plasma electrode according to claim 2, characterized in that: The movable terminal block (5) is movably installed inside the handle (1). The movable terminal block (5) is fixed with a first positive terminal connecting tube (15) and a first negative terminal connecting tube (16) at one end near the insulating outer tube (2). The movable terminal block (5) is fixed with a second positive terminal connecting tube (17) and a second negative terminal connecting tube (18) at one end away from the insulating outer tube (2). The movable terminal block (5) has a receiving groove (19) at its bottom. The fixed terminal block (6) is fixed on the inner wall of the handle (1) and is located in the receiving groove (19). The first positive terminal connecting tube (15), the positive terminal (7) and the second positive terminal connecting tube (17) are coaxially arranged. The first negative terminal connecting tube (16), the negative terminal (8) and the second negative terminal connecting tube (18) are coaxially arranged.

5. The plasma electrode according to claim 4, characterized in that: There are two electrode wires (3). The two electrode wires (3) are fixed on the electrode disk (10). Both electrode wires (3) are electrically connected to the second positive electrode connecting tube (17) and the second negative electrode connecting tube (18) through wires.

6. The plasma electrode according to claim 4, characterized in that: The electrode core includes an electrode core tube (32), an electrode core positive electrode (20), an electrode core negative electrode (21), and an insulating partition (22). The electrode core positive electrode (20), the electrode core negative electrode (21), and the insulating partition (22) are all fixed at one end of the electrode core tube (32). The insulating partition (22) is located between the electrode core positive electrode (20) and the electrode core negative electrode (21). The electrode core positive electrode (20) is electrically connected to the first positive electrode connecting tube (15) through a wire, and the electrode core negative electrode (21) is electrically connected to the first negative electrode connecting tube (16) through a wire.

7. The plasma electrode according to claim 2, characterized in that: The insulating outer tube (2) is provided with two temperature-sensing optical fibers (23). One end of the two temperature-sensing optical fibers (23) passes through the ceramic base (9) and the electrode plate (10), and the two ends of the temperature-sensing optical fibers (23) are fixedly connected to the electrode plate (10). The other end of the two temperature-sensing optical fibers (23) passes through the handle (1) and is connected to the connection terminal (24).

8. The plasma electrode according to claim 7, characterized in that: The inner wall of the handle (1) is fixedly provided with a self-locking device lock body (25), the outer wall of the movable terminal block (5) is fixedly provided with a pressing rod connecting seat (26), one end of the pressing rod connecting seat (26) is fixedly provided with a self-locking device lock tongue (27), and the other end of the pressing rod connecting seat (26) is fixedly provided with a spring (28). The pressing rod is composed of a first round rod (29), a second round rod (30) and a pressing cap (31) connected in sequence. The diameter of the first round rod (29) is smaller than the diameter of the second round rod (30). The spring (28) is sleeved on the first round rod (29), and one end of the spring (28) is fixedly connected to the end face of the second round rod (30).

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