Plasma operation electrode

Abstract

The invention discloses a plasma surgical electrode, and relates to the technical field of medical instruments. In order to solve the problems that multiple steps and multiple instruments are involved in the existing endoscopic surgery, and the surgery efficiency is reduced, the following technical scheme is provided: the endoscopic surgical knife comprises a cable, a handle, a knife bar and a knife head which are connected in sequence; when a reset button on the handle is pressed down, the limiting piece drives the positive electrode to stretch out and draw back and further drives the electrode tool bit to stretch out and draw back, the pre-bent electrode tool bit can stretch out and draw back into the ceramic head and stretch out of the ceramic head under the limitation of the fixing pin, and rapid carpal canal cutting and effective blood coagulation can be achieved under bipolar cutting; during use, an endoscope is inserted into the endoscope guide tube, when turbid liquid in an operation needs to be cleaned, suction is started, and the liquid can be pumped out of the suction tube through the suction channel. The device is excellent in cutting efficiency, bleeding amount control, operation accuracy, safety and the like, and has the advantages of being capable of sucking turbid liquid in an operation, easy and convenient to operate, wide in application range and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a plasma surgical electrode. Background Art

[0002] Endoscopic surgery is a minimally invasive surgical procedure performed through small incisions or natural body openings. Endoscopic surgery typically involves the use of specialized equipment and remotely controlled instruments, with indirect visualization of the surgical area through an endoscope or similar device. Compared to open surgery, endoscopic surgery may be less invasive and result in shorter hospital stays.

[0003] Carpal tunnel syndrome (CTS) is a median neuropathy caused by compression of the median nerve at the wrist within the carpal tunnel. Symptoms of CTS include tingling, numbness, weakness, or pain in the fingers or hand innervated by the median nerve. Repetitive tasks, force, posture, and vibration have been implicated as causative or contributing factors to CTS. Conservative treatment for CTS includes direct corticosteroid injections, splints, oral corticosteroids, and / or behavioral modification.

[0004] Typically, endoscopic procedures involve multiple instruments in multiple steps. To facilitate insertion of a cannula, the cannula's central lumen must be filled with a device, such as an obturator. The obturator is then removed, and an endoscope or arthroscope is inserted into the cannula for visualization. The endoscope is then withdrawn from the cannula, and either a knife is advanced into the cannula for dissection, or a specialized knife assembly is attached to the endoscope, and the knife / endoscope assembly is then advanced into the cannula for dissection.

[0005] Currently, there is still a lack of medical devices for efficient operations related to endoscopic carpal tunnel and other tissue release. Summary of the Invention

[0006] The purpose of the present invention is to provide a plasma surgical electrode to solve the problem that existing endoscopic surgery involves multiple steps and multiple instruments, which reduces the efficiency of the surgery.

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] A plasma surgical electrode, comprising: a cable, a handle, a knife rod, and a knife head connected in sequence;

[0009] The blade head includes an electrode blade head and a ceramic head. The electrode blade head is connected to the positive electrode provided in the blade rod. The positive electrode is connected to the blade head telescopic control mechanism provided in the handle. The blade head telescopic control mechanism drives the electrode blade head to telescope in the ceramic head through the positive electrode. When the electrode blade head extends out of the ceramic head, tissue cutting is performed.

[0010] The suction channel set in the knife rod is used to suction turbid fluid during surgery through a suction tube connected by a cable.

[0011] Preferably, a fixing pin is further provided in the cutter head, and the fixing pin limits the extending position of the electrode cutter head.

[0012] Preferably, the metal at the front end of the electrode bit is exposed, and the side end of the electrode bit is provided with a second insulating layer.

[0013] Preferably, the blade extension and retraction control mechanism includes a button, a lower end of the button is provided with a limit member, and the limit member is fixedly connected to the positive electrode.

[0014] Preferably, a limiting groove is provided in the handle, and the limiting member slides in the limiting groove.

[0015] Preferably, a spring is provided in the limiting member, and the spring is sleeved on the outside of the negative electrode steel tube provided in the knife rod.

[0016] Preferably, the outer sleeves of the positive electrode and the negative electrode steel tubes are provided with internal fixing parts.

[0017] Preferably, a suction hole is provided on the internal fixing member, and the suction channel is connected to the suction tube through the suction hole.

[0018] The present invention has the following beneficial effects:

[0019] Bipolar radiofrequency design significantly improves cutting efficiency: This device utilizes bipolar radiofrequency technology, a cutting system consisting of a positive electrode and a negative steel tube. This system generates plasma under the stimulation of high-frequency electrical energy. This energy form offers higher cutting speed and efficiency than traditional mechanical cutting instruments. The bipolar design allows for more concentrated electrical energy and more efficient energy transmission, resulting in faster tissue cutting.

[0020] Effectively reduces bleeding and improves surgical safety: During plasma cutting, high-frequency electrical energy rapidly seals blood vessels at the cutting site, achieving immediate coagulation. This significantly reduces bleeding during surgery, minimizing surgical risks and complications. For surgeries requiring delicate incisions and associated with a high risk of bleeding, this invention provides a safer and more reliable solution.

[0021] The filament-shaped electrode tip design concentrates energy for precise cutting: The electrode tip of this invention utilizes a filament-shaped design. This design not only makes the tip more flexible, facilitating operation in narrow or complex surgical areas, but more importantly, it achieves a high degree of energy concentration. Because energy is concentrated at the tip of the electrode tip, cutting is more precise and causes less damage to surrounding tissue. This design further enhances surgical accuracy and safety.

[0022] Reduce surgical trauma and promote postoperative recovery: Because plasma cutting is fast, precise, and produces minimal bleeding, damage to surrounding tissues during surgery is minimized. This helps reduce surgical trauma, promote postoperative recovery, and shorten the patient's recovery period.

[0023] The device also features intraoperative turbid fluid aspiration, maintaining a clear surgical field of view. Through the aspiration channel and tube, it can promptly remove turbid fluids such as blood and tissue fragments generated during surgery, maintaining a clear surgical field of view. This feature not only improves surgical precision and safety, but also makes the surgical process smoother, reducing operative time and operational difficulty.

[0024] Simple operation improves surgical efficiency: The plasma surgical electrode of this invention is rationally designed and easy to operate. The surgeon can control the extension and retraction of the electrode blade by operating buttons on the handle, achieving precise cutting. Furthermore, the design of the endoscopic guide tube allows the surgeon to perform the cutting operation under direct vision, further improving surgical efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the plasma surgical electrode of the present invention;

[0026] Figure 2 This is a cross-sectional view of the interior of the handle of the plasma surgical electrode of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the blade extension and retraction control mechanism of the plasma surgical electrode of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the blade of the plasma surgical electrode of the present invention;

[0029] Figures 1 to 4 The figures shown in the figure respectively represent: cable 1, handle 2, knife rod 3, knife head 4, cable 5, suction tube 6, endoscope guide tube 7, button 8, limiter 9, spring 10, internal fixing part 11, limit groove 12, negative steel pipe 13, endoscope channel tube 14, positive electrode 15, positive cable 16, negative cable 17, suction channel 18, first insulating layer 19, electrode knife head 20, ceramic head 21, second insulating layer 22, fixing pin 23. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0031] Please refer to Figure 1 The present invention relates to a plasma surgical electrode, particularly suitable for minimally invasive surgery. Its ingenious design and compact structure enable precise tissue cutting and intraoperative turbid fluid aspiration, improving surgical efficiency and safety. The following is a detailed description of specific embodiments of the present invention.

[0032] The plasma surgical electrode of the present invention is primarily composed of a cable 1, a handle 2, a blade shank 3, and a blade head 4, connected in sequence. The cable 1 serves as an energy transmission channel and a carrier for the suction tube, the handle 2 is used for operational control, the blade shank 3 is an extension of the electrode, and the blade head 4 is the component that actually performs the cutting operation.

[0033] Cable 1 consists of an electrical cable 5 and a suction tube 6. Cable 5 transmits high-frequency electrical energy to stimulate plasma for cutting. Suction tube 6 is used to aspirate turbid fluid during surgery to maintain a clear surgical field of view. Both cable 5 and suction tube 6 are designed to be durable and rugged to withstand the complex surgical environment and prolonged use.

[0034] Handle 2, the core component for operation and control, houses the blade extension and retraction control mechanism. Crafted from lightweight, high-strength materials, handle 2 ensures durability while reducing the operator's burden. Cable 1 is securely fastened and connected at one end of handle 2, ensuring stable power transmission and unobstructed suction tube operation.

[0035] The blade rod 3 is connected to the other end of the handle 2 and serves to extend the electrode to the surgical site. The length and diameter of the blade rod 3 are designed based on surgical requirements, ensuring sufficient rigidity and stability while also facilitating easy manipulation by the surgeon. A suction channel 18 is located within the blade rod 3 and communicates with the suction tube 6 in the cable 1 to aspirate turbid fluids during surgery.

[0036] Reference Figure 4 The cutting head 4 is a key component of the plasma surgical electrode of the present invention, consisting of an electrode cutting head 20 and a ceramic head 21. The electrode cutting head 20 is the actual executor of the cutting operation. It is made of high-performance tungsten-molybdenum metal, which has excellent conductivity and high-temperature stability. It can generate plasma under the stimulation of high-frequency electrical energy, achieving rapid tissue cutting. Furthermore, the electrode cutting head 20 is pre-curved to better adapt to the shape and angle of the surgical site, improving cutting accuracy and efficiency.

[0037] The ceramic tip 21 wraps around the electrode tip 20, providing protection and insulation. Made of a material with exceptional hardness and corrosion resistance, the ceramic tip 21 withstands friction and heat generated during surgery, protecting the electrode tip 20 from damage. Furthermore, the insulating properties of the ceramic tip 21 prevent electrical contact between the electrode tip 20 and other tissues or instruments during the cutting process, ensuring surgical safety.

[0038] The electrode tip 20 is connected to the positive electrode 15 within the cutter bar 3 via a wire or conductive connector. The positive electrode 15 acts as a channel for electrical energy transmission, transferring high-frequency electrical energy from the cable 5 within the cable 1 to the electrode tip 20, stimulating plasma for cutting. The material and cross-sectional dimensions of the positive electrode 15 are optimized to ensure stable electrical energy transmission and sufficient current density, thereby improving cutting efficiency.

[0039] The positive electrode 15 is connected to the blade extension and retraction control mechanism provided in the handle 2. The design of the blade extension and retraction control mechanism allows the operator to control the extension and retraction movement of the electrode blade 20 in the ceramic head 21 by operating the button 8 on the handle 2. When the button 8 is pressed, the blade extension and retraction control mechanism drives the positive electrode 15 to drive the electrode blade 20 to extend forward from the ceramic head 21 to perform tissue cutting; when the button 8 is released, the blade extension and retraction control mechanism drives the positive electrode 15 to drive the electrode blade 20 to retract backward into the ceramic head 21 to stop the cutting operation. This design allows the operator to flexibly control the extension length and cutting depth of the electrode blade 20 as needed to achieve precise cutting.

[0040] A retaining pin 23 is also located within the cutter head 4 to limit the extension of the electrode tip 20. The material and position of the retaining pin 23 have been carefully designed to ensure that the electrode tip 20 remains stably within the predetermined extension length when extending from the ceramic tip 21 for cutting, preventing it from shifting or shaking due to external forces. Furthermore, the retaining pin 23 prevents the electrode tip 20 from extending excessively from the ceramic tip 21 during cutting, potentially causing damage or inaccurate cutting.

[0041] At the front end of the electrode tip 20, the metal is exposed to facilitate electrical contact with surrounding tissue and stimulate plasma for cutting. A second insulating layer 22 is provided at the side of the electrode tip 20 to prevent unwanted electrical contact with other tissues or instruments. The material and thickness of the second insulating layer 22 are optimized to ensure adequate insulation without affecting the cutting effect of the electrode tip 20.

[0042] Reference Figure 3The specific design of the blade extension and retraction control mechanism includes components such as a button 8, a stopper 9, a spring 10, and an internal fixing 11. The button 8 is located on the outside of the handle 2 for easy operation by the surgeon. When pressed, the lower end of the button 8 contacts the stopper 9, pushing it to slide within a stopper slot 12. The stopper slot 12 is located within the handle 2 and limits the movement trajectory and range of the stopper 9.

[0043] The stopper 9 is fixedly connected to the positive electrode 15. Therefore, when the stopper 9 slides within the stopper slot 12, it can drive the positive electrode 15 to extend and retract. A spring 10 is located within the stopper 9 and is mounted on the outside of the negative electrode steel tube 13 within the blade shank 3. The spring 10 provides a reset force for the blade extension control mechanism. When the button 8 is released, the spring 10 pushes the stopper 9 and the positive electrode 15 back to their initial position, thereby automatically retracting the electrode blade 20.

[0044] The internal fixture 11, positioned between the negative steel tube 13 and the endoscope channel tube 14, secures and supports the various components of the blade extension and retraction control mechanism. A suction hole is also formed in the internal fixture 11, through which the suction channel 18 connects to the suction tube 6. This allows the surgeon to remove turbid fluid during surgery by activating the suction mechanism, drawing it through the suction channel 18 and the suction hole into the suction tube 6 and out of the surgical area.

[0045] A limit slot 12 is further provided in the handle 2 to further limit the movement trajectory and range of the limiter 9. The design of the limit slot 12 ensures that the limiter 9 does not deviate from the predetermined path during the sliding process, thereby ensuring smooth and accurate extension and retraction of the electrode tip 20.

[0046] The negative steel tube 13 serves as the negative electrode, forming a bipolar cutting system together with the positive electrode 15. The material and cross-sectional dimensions of the negative steel tube 13 are optimized to ensure it can carry sufficient current density and maintain stable operation. A first insulating layer 19 is also provided on the outside of the negative steel tube 13 to prevent unwanted electrical contact with other tissues or instruments.

[0047] Reference Figure 2 In the plasma surgical electrode of the present invention, an endoscope guide tube 7 serves as an insertion channel for the endoscope, extending throughout the handle 2 and the blade shaft 3. The design of the endoscope guide tube 7 allows the surgeon to insert the endoscope and observe the surgical field at the blade tip 4. This allows the surgeon to perform the cutting operation under direct vision, greatly improving surgical precision and safety.

[0048] The following is a detailed description of the working principle of the plasma surgical electrode of the present invention:

[0049] Before the operation begins, the surgeon inserts the plasma surgical electrode of the present invention into the surgical site and observes the surgical field of view by inserting an endoscope through the endoscope guide tube 7. At this time, the button 8 is in a natural state, and the electrode blade 20 is fixed in the ceramic head 21 and does not extend.

[0050] When the operator needs to cut tissue, they press button 8, the lower end of which pushes stopper 9 to slide forward within stopper slot 12. This causes stopper 9 to extend forward, driving electrode tip 20 within ceramic tip 21. Because the tip of electrode tip 20 is exposed, when it comes into contact with surrounding tissue, high-frequency electrical energy is transmitted via cable 5 to both positive electrode 15 and electrode tip 20, stimulating plasma and enabling cutting.

[0051] During the cutting process, the operator can control the extension length and cutting depth of the electrode tip 20 by operating the button 8. When cutting needs to be stopped, the button 8 is released, and the spring 10 pushes the limiter 9 and the positive electrode 15 back to the initial position, and the electrode tip 20 is also retracted into the ceramic head 21.

[0052] In addition, when the operator needs to clean up the turbid liquid during the operation, the suction device can be turned on. The suction device sucks the turbid liquid through the suction tube 6 and the suction channel 18 and discharges it outside the operating area to keep the operating field clear.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plasma surgical electrode, characterized in that: include: A cable (1), a handle (2), a knife bar (3) and a knife head (4) connected in sequence; The cutter head (4) comprises an electrode cutter head (20) and a ceramic head (21), wherein the electrode cutter head (20) is connected to a positive electrode (15) provided in the cutter rod (3), and the positive electrode (15) is connected to a cutter head telescopic control mechanism provided in the handle (2), and the cutter head telescopic control mechanism drives the electrode cutter head (20) to perform telescopic movement in the ceramic head (21) through the positive electrode (15), and tissue cutting is performed when the electrode cutter head (20) extends out of the ceramic head (21); The suction channel (18) provided in the knife rod (3) is used to suction turbid fluid during surgery through the suction tube (6) connected to the cable (1).

2. The plasma surgical electrode according to claim 1, characterized in that: A fixing pin (23) is also provided in the cutter head (4), and the fixing pin (23) limits the extended position of the electrode cutter head (20).

3. The plasma surgical electrode according to claim 1, characterized in that: The metal at the front end of the electrode blade head (20) is exposed, and a second insulating layer (22) is provided at the side end of the electrode blade head (20).

4. The plasma surgical electrode according to claim 1, characterized in that: The blade extension and retraction control mechanism comprises a button (8), a limiter (9) is provided at the lower end of the button (8), and the limiter (9) is fixedly connected to the positive electrode (15).

5. The plasma surgical electrode according to claim 4, characterized in that: A limiting groove (12) is provided in the handle (2), and the limiting member (9) slides in the limiting groove (12).

6. The plasma surgical electrode according to claim 5, characterized in that: A spring (10) is provided in the limiting member (9), and the spring (10) is sleeved on the outside of the negative electrode steel tube (13) provided in the knife rod (3).

7. The plasma surgical electrode according to claim 6, characterized in that: An internal fixing member (11) is provided between the negative electrode steel tube (13) and the endoscope channel tube (14) in the knife rod (3).

8. The plasma surgical electrode according to claim 7, characterized in that: A suction hole is provided on the inner fixing member (11), and the suction channel (18) is connected to the suction tube (6) through the suction hole.

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