Radio frequency plasma surgical electrode for spine

Abstract

The radio frequency plasma surgical electrode comprises an electrode tip, an electrode rod, a handle and a cable connector which are connected in sequence, the electrode tip comprises an insulating head, a first electrode is arranged at the front end of the insulating head, a second electrode is arranged on one side of the insulating head, and the second electrode is arranged on the other side of the insulating head. The handle is provided with a sliding button used for switching the power-on state of the first electrode and the power-on state of the second electrode, and the sliding button is connected with the first electrode and drives the first electrode to stretch out and draw back at the front end of the insulating head. According to the scheme, the first electrode and the second electrode can be switched for use by sliding the button, so that large-area tissue cutting can be met, small-area local ablation can also be realized, the frequency of replacing instruments in the operation process is reduced, the operation time is saved, and the operation efficiency is improved; and the first electrode and the second electrode do not interfere with each other when being independently used, so that the device can adapt to complex spinal surgeries.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a radio frequency plasma surgical electrode for the spine. Background Technology

[0002] In recent decades, with the tremendous advancements in spinal surgery concepts and technologies, the prevalence of minimally invasive spinal surgery has greatly increased. Minimally invasive spinal surgery advocates minimizing or avoiding tissue damage related to the surgical approach, preserving normal anatomical structures within the surgical area as much as possible, and enabling rapid postoperative recovery and a better quality of life. To date, minimally invasive spinal surgery includes minimally invasive anterior lumbar interbody fusion (MIS-ALIF), minimally invasive posterior lumbar interbody fusion (MIS-PLIF) / minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF), oblique lateral approach lumbar interbody fusion (OLIF), and extreme lateral lumbar interbody fusion (XLIF), as well as endoscopic fusion techniques that have begun to develop in recent years. Among these, the most representative endoscopic fusion technique is single- or double-incision endoscopic laminectomy for lumbar spinal stenosis and lumbar disc herniation.

[0003] In minimally invasive spinal surgery, a variety of surgical instruments are used, and plasma surgical electrodes are one such commonly used instrument. Existing plasma surgical electrodes mostly use plasma scalpels with fixed working tips. However, when performing related surgeries inside the spine, different working tips with different working areas are often required for different locations and ablation areas. Existing plasma scalpels with fixed working tips cannot meet these needs. Utility Model Content

[0004] To address the aforementioned shortcomings of the existing technology, this utility model provides a retractable, switchable working tip radio frequency plasma surgical electrode for the spine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A radiofrequency plasma surgical electrode for the spine is provided, comprising an electrode head, an electrode rod, a handle, and a cable connector connected in sequence. The electrode head includes an insulating head, a first electrode for local small-area tissue ablation is provided at the front end of the insulating head, and a second electrode for large-area tissue ablation is provided on one side of the insulating head. A sliding button is provided on the handle for switching the energized state of the first electrode and the second electrode, and the sliding button is connected to the first electrode and drives the first electrode to extend and retract at the front end of the insulating head.

[0007] Furthermore, the handle includes a housing and a mounting block fixed inside the housing. The mounting block is provided with a first pin assembly, a second pin assembly, and an intermediate pin assembly. The first pin assembly is connected to a first electrode via a wire, the second pin assembly is connected to a second electrode via a wire, and the intermediate pin assembly is connected to a power supply wire on a cable connector. A conductive slider is slidably provided on the mounting block to switch the energized state of the intermediate pin assembly with the first pin assembly and the second pin assembly respectively. The conductive slider is connected to a sliding button via a mounting plate.

[0008] Furthermore, a shaping hose is inserted inside the electrode rod, and a winding post is provided at the front end of the mounting plate. The first electrode is fixed to the front end of the shaping hose, and the rear end of the shaping hose is fixedly wound around the winding post. The two wires connecting the first electrode and the first pin assembly are inserted inside the shaping hose.

[0009] Furthermore, the first electrode is bullet-shaped, and the front end of the first electrode includes two hemispherical heads, which are isolated from each other by an insulating component, and the two hemispherical heads are respectively connected to two pins of the first pin assembly by two wires.

[0010] Furthermore, the second electrode includes an electrode sheet and two electrode wire protrusions. The electrode sheet is provided with several triangular blind holes and two clearance holes for passing through the electrode wire protrusions. The two electrode wire protrusions are connected to the two pins of the second pin assembly through two wires respectively.

[0011] Furthermore, the electrode rod is a hollow rod that facilitates wire threading, and an insulating sleeve or an insulating layer is fitted on the electrode rod.

[0012] Furthermore, the housing is provided with a groove for limiting the sliding button, and a strip hole is provided in the groove. The sliding button is connected to the mounting plate by bolts, and the bolts pass through the strip hole.

[0013] Furthermore, a waterproof ring is provided in the groove around the strip hole, and the waterproof ring makes sliding sealing contact with the sliding button.

[0014] The beneficial effects of this utility model are as follows:

[0015] This design allows for switching between the first and second electrodes via a sliding button, enabling both large-area tissue cutting and small-area local ablation. This reduces the frequency of instrument changes during surgery, saves surgical time, and improves surgical efficiency. Furthermore, when the first electrode is needed, the sliding button extends it, and when the second electrode is needed, it retracts it, ensuring that the first and second electrodes do not interfere with each other when used individually, thus facilitating complex spinal surgeries. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a radiofrequency plasma surgical electrode for the spine.

[0017] Figure 2 This is a schematic diagram of the electrode head.

[0018] Figure 3 This is a schematic diagram of the internal structure of the electrode head.

[0019] Figure 4 This is a schematic diagram of the internal structure of the handle.

[0020] Figure 5 This is a schematic diagram of the structure of the part where the handle and the sliding button work together.

[0021] Figure 6 This is a schematic diagram of the electrode head structure when the first electrode contracts.

[0022] The components are as follows: 1. Electrode head, 2. Electrode rod, 3. Handle, 4. Cable connector, 5. Insulating head, 6. First electrode, 7. Second electrode, 8. Sliding button, 9. Mounting block, 10. First pin assembly, 11. Second pin assembly, 12. Intermediate pin assembly, 13. Power supply wire, 14. Conductive slider, 15. Mounting plate, 16. Winding post, 17. Shaped flexible tube, 18. Hemispherical head, 19. Electrode plate, 20. Electrode wire protrusion, 21. Triangular blind hole, 22. Groove, 23. Strip hole, 24. Bolt, 25. Waterproof ring, 26. Wire. Detailed Implementation

[0023] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0024] like Figure 1 and Figure 2 As shown, the spinal radiofrequency plasma surgical electrode of this solution includes an electrode head 1, an electrode rod 2, a handle 3, and a cable connector 4 connected in sequence. The electrode head 1 includes a hollow insulating head 5, which can be integrally formed from ceramic material. A first electrode 6 for local small-area tissue ablation is provided at the front end of the insulating head 5, and a second electrode 7 for large-area tissue ablation is provided on one side of the insulating head 5. A sliding button 8 is provided on the handle 3 for switching the energized state of the first electrode 6 and the second electrode 7, and the sliding button 8 is connected to the first electrode 6 and drives the first electrode 6 to extend and retract at the front end of the insulating head 5.

[0025] like Figure 2As shown, the first electrode 6 is bullet-shaped. The front end of the first electrode 6 includes two hemispherical heads 18 of the same shape and size. The two hemispherical heads 18 are separated by an insulating component. This arrangement is beneficial to increasing the local point ablation effect. The second electrode 7 includes a thin electrode sheet 19 and two electrode wire protrusions 20. The electrode sheet 19 is provided with several triangular blind holes 21 and two clearance holes for passing through the electrode wire protrusions 20.

[0026] like Figure 3 and Figure 4 As shown, the handle 3 includes a housing and a mounting block 9 fixed inside the housing. The mounting block 9 is provided with a first pin assembly 10, a second pin assembly 11 and an intermediate pin assembly 12. The first pin assembly 10 is connected to two hemispherical heads 18 through two wires 26. The second pin assembly 11 is connected to two electrode wire protrusions 20 through two wires 26. The intermediate pin assembly 12 is connected to the positive and negative power supply wires 13 on the cable connector 4 respectively. A conductive slider 14 is slidably provided on the mounting block 9 to switch the intermediate pin assembly 12 to be energized with the first pin assembly 10 and the second pin assembly 11 respectively.

[0027] The conductive slider 14 is connected to the sliding button 8 via the mounting plate 15. A shaping hose 17 is inserted inside the electrode rod 2. A winding post is provided at the front end of the mounting plate. The first electrode is fixed to the front end of the shaping hose, and the rear end of the shaping hose is fixedly wound around the winding post. The two wires connecting the first electrode and the first pin assembly are inserted inside the shaping hose. A winding post 16 is provided at the front end of the mounting plate 15. The first electrode 6 is fixedly snapped or bonded to the front end of the shaping hose 17, and the rear end of the shaping hose 17 is fixedly wound around the winding post 16. Thus, the movement of the shaping hose 17 can be driven by the sliding button 8 to control the extension and retraction of the two hemispherical heads 18 on the first electrode 6. The two wires 26 connecting the hemispherical heads 18 and the first pin assembly 10 are inserted inside the shaping hose 17.

[0028] like Figure 4 and Figure 5 As shown, the housing is provided with a groove 22 for limiting the sliding button 8. A strip hole 23 is provided in the groove 22. The sliding button 8 is connected to the mounting plate 15 by bolts 24. The bolts 24 pass through the strip hole 23. A waterproof ring 25 is provided in the groove 22 around the strip hole 23. The waterproof ring 25 slides and seals with the sliding button 8, thereby improving the water drainage performance of the handle 3.

[0029] The electrode rod 2 is a hollow rod. The wire 26 and the shaping hose 17 between the electrode head 1 and the handle 3 are both inserted inside the electrode rod 2. The electrode rod 2 is fitted with an insulating sleeve or coated with an insulating layer.

[0030] The following is a detailed explanation of the working process of this plan:

[0031] like Figure 6 As shown, when large-area tissue ablation is required, the sliding button 8 is pushed to the rear end of the handle 3. The mounting plate 15 drives the winding post 16 to move backward, retracting the first electrode 6 into the insulating head 5, so that the first electrode 6 is in an idle state. At the same time, the mounting plate 15 also drives the conductive slider 14 to move backward. The backward-moving conductive slider 14 can connect the intermediate pin assembly 12 and the second pin assembly 11, so that the second electrode 7 is in a conductive working state. Electrical energy is released through the electrode wire protrusion 20 to form a plasma cutting area. At the same time, the vertex of each triangular blind hole 21 also forms a discharge point, so as to form a discharge area with a large area and sufficient energy, thereby achieving large-area tissue ablation through the second electrode 7.

[0032] If only a small area of ​​tissue needs to be ablated, push the sliding button 8 to the front end of the handle 3. The mounting plate 15 will move the winding post 16 forward and extend the first electrode 6 out of the insulating head 5. At the same time, the mounting plate 15 will also move the conductive slider 14 forward. The forward-moving conductive slider 14 will connect the intermediate pin assembly 12 with the first pin assembly 10, so that the first electrode 6 is in a conductive working state, while the second electrode 7 is in an idle state. Thus, ablation of small area or even point-like tissue can be achieved through the first electrode 6.

[0033] In summary, this solution controls the conductive slider 14 and each pin assembly to conduct or disconnect via the sliding button 8, allowing for switching between the first electrode 6 and the second electrode 7. This enables both large-area tissue cutting and small-area local ablation, thereby reducing the frequency of instrument changes during surgery, saving surgical time, and improving surgical efficiency. Furthermore, the first electrode 6 and the second electrode 7 do not interfere with each other when used individually, making it suitable for complex spinal surgeries.

Claims

1. A radiofrequency plasma surgical electrode for the spine, characterized in that, The device includes an electrode head, an electrode rod, a handle, and a cable connector connected in sequence. The electrode head includes an insulating head, and a first electrode for local small-area tissue ablation is provided at the front end of the insulating head. A second electrode for large-area tissue ablation is provided on one side of the insulating head. The handle is provided with a sliding button for switching the energized state of the first electrode and the second electrode. The sliding button is connected to the first electrode and drives the first electrode to extend and retract at the front end of the insulating head.

2. The radiofrequency plasma surgical electrode for the spine according to claim 1, characterized in that, The handle includes a housing and a mounting block fixed inside the housing. The mounting block is provided with a first pin assembly, a second pin assembly, and an intermediate pin assembly. The first pin assembly is connected to a first electrode via a wire, the second pin assembly is connected to a second electrode via a wire, and the intermediate pin assembly is connected to a power supply wire on a cable connector. A conductive slider is slidably disposed on the mounting block to switch the energized state of the intermediate pin assembly with the first pin assembly and the second pin assembly respectively. The conductive slider is connected to a sliding button via a mounting plate.

3. The radiofrequency plasma surgical electrode for the spine according to claim 2, characterized in that, A shaping hose is inserted inside the electrode rod, and a winding post is provided at the front end of the mounting plate. The first electrode is fixed to the front end of the shaping hose, and the rear end of the shaping hose is fixedly wound around the winding post. The wire connecting the first electrode and the first pin assembly is inserted inside the shaping hose.

4. The radiofrequency plasma surgical electrode for the spine according to claim 3, characterized in that, The first electrode is bullet-shaped, and the front end of the first electrode includes two hemispherical heads. The two hemispherical heads are isolated from each other by an insulating component, and the two hemispherical heads are respectively connected to two pins of the first pin assembly by two wires.

5. The radiofrequency plasma surgical electrode for the spine according to claim 2, characterized in that, The second electrode includes an electrode sheet and two electrode wire protrusions. The electrode sheet is provided with several triangular blind holes and two clearance holes for passing through the electrode wire protrusions. The two electrode wire protrusions are respectively connected to two pins of the second pin assembly through two wires.

6. The radiofrequency plasma surgical electrode for the spine according to claim 2, characterized in that, The electrode rod is a hollow rod that facilitates wire threading, and the electrode rod is fitted with an insulating sleeve or coated with an insulating layer.

7. The radiofrequency plasma surgical electrode for the spine according to claim 2, characterized in that, The housing is provided with a groove for limiting the sliding button, and a strip hole is provided in the groove. The sliding button is connected to the mounting plate by bolts, and the bolts pass through the strip hole.

8. The radiofrequency plasma surgical electrode for the spine according to claim 7, characterized in that, A waterproof ring is provided in the groove around the strip hole, and the waterproof ring makes sliding sealing contact with the sliding button.

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