Surgical electrode with telescopic function for ablation electrode

Abstract

The utility model relates to the technical field of ablation electrodes, in particular to an operation electrode with a telescopic function for an ablation electrode, which comprises a shell, a spring is fixedly mounted in the shell, an outer needle tube with one end penetrating through the shell is movably mounted in the shell, and a rubber sleeve is sleeved on the outer side wall of the outer needle tube. The side wall of the rubber sleeve abuts against the spring, a linear hole is formed in the outer needle tube, a strip-shaped hole is formed in the shell, and an inner needle tube is movably installed in the outer needle tube. After the needle head is in contact with a tumor, the outer needle tube is pushed to move towards the outside of the body by a certain distance through the rubber sleeve by loosening the long deflector rod and enabling the thrust of the spring to recover the elastic deformation, so that the outer needle tube is separated from the side surface of the needle head, the limitation on the needle wire is relieved, and the needle wire is opened outwards to form an umbrella shape; the whole operation only needs to control and push the long deflector rod, other operations are not needed, the use is very simple, convenient and rapid, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation electrodes, in particular to a surgical electrode for an ablation electrode with a telescopic function. Background Art

[0002] The ablation electrode is a medical device that uses the radio frequency principle to apply high-frequency and high-voltage current to the patient's body through a knife pen, so that the tip of the knife pen produces instantaneous burning on the contacted part to achieve the effect of cutting or coagulation. The ablation electrode can achieve efficient and safe use in actual use. The most common one is radiofrequency ablation.

[0003] For example, a multi-needle radiofrequency ablation electrode proposed in Chinese patent CN2023213070844 can open the needle wires after the needle wires are close to the tumor position, so as to prevent the needle wires from being accidentally bent, broken or stuck before reaching the designated position. However, after the main needle reaches the designated position, it is necessary to turn the switch knob to open it, and then turn the adjustment knob to open the needle wires in an umbrella shape, which is not easy to operate. Utility Model Content

[0004] To address the deficiencies in the prior art, the utility model provides a surgical electrode for an ablation electrode with a telescopic function, comprising a shell, a spring fixedly installed in the shell, an outer needle tube with one end penetrating the shell movably installed in the shell, the outer wall of the outer needle tube is sleeved with a rubber sleeve, the side wall of the rubber sleeve resists the spring, a straight hole is provided on the outer needle tube, a strip hole is provided on the shell, an inner needle tube is movably installed in the outer needle tube, a short lever with one end extending to the outside of the shell through the straight hole and the strip hole is fixedly installed on the side wall of the inner needle tube, a long lever with one end extending to the outside of the shell through the strip hole and located on the side of the short lever away from the spring is fixedly installed on the side wall of the outer needle tube, a needle is fixedly installed on one end of the inner needle tube located outside the shell, and a plurality of needle wires evenly distributed around the inner needle tube are movably installed in the outer needle tube.

[0005] Preferably, the shell consists of an upper and a lower part fixed by screws.

[0006] Preferably, a movable ring is fixedly installed at one end of the spring, and a conical ring is fixedly installed on the side of the movable ring away from the spring, the conical ring is composed of two half cones, and the two half cones form a cone with a gap between them, the outer wall of the conical ring is provided with a thread, and the outer wall of the conical ring is connected with a nut through the thread matching the outer wall of the conical ring, and when the nut is rotated in the direction of increasing the diameter of the conical ring, the conical ring is squeezed against the rubber sleeve to increase the friction between the rubber sleeve and the outer needle tube.

[0007] Preferably, the end of the needle close to the inner needle tube is arc-shaped.

[0008] Preferably, the length of the linear hole matches the telescopic length of the spring.

[0009] Preferably, resistance-increasing pads are fixedly mounted on opposite sides of the short lever, and the two resistance-increasing pads are in contact with opposite side walls of the strip-shaped hole, respectively.

[0010] The utility model has the following beneficial effects:

[0011] During surgery, the outer needle tube and the needle drive the needle thread to penetrate into the body by pushing the long lever, and the friction between the rubber sleeve and the inner needle tube compresses the spring. After the spring is compressed to the limit, the static friction between the outer needle tube and the rubber sleeve breaks through and slides, so that the outer needle tube further penetrates into the body, ensuring that the outer needle tube has a sufficient movable stroke. After the needle head contacts the tumor, it is only necessary to release the long lever to allow the spring to restore its elastic deformation and push the outer needle tube to move a certain distance outside the body through the rubber sleeve, so that the outer needle tube is separated from the side of the needle head, the restriction on the needle thread is released, and the needle thread is opened outward in an umbrella shape. The entire operation only requires controlling and pushing the long lever, and no other operations are required. It is very simple and fast to use, and convenient for surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure provided by the utility model.

[0013] Attached Figure 1 The structures represented by the labels are listed below:

[0014] 1. Shell; 2. Fixed ring; 3. Outer needle tube; 4. Rubber sleeve; 5. Spring; 6. Movable ring; 7. Inner needle tube; 8. Nut; 9. Straight hole; 10. Strip hole; 11. Short lever; 12. Resistance pad; 13. Long lever; 14. Needle thread; 15. Cone ring; 16. Needle head. DETAILED DESCRIPTION

[0015] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0016] It should be noted that when a part or component is considered to be "connected", "located", or "assembled" on another part or component, it may be directly disposed on the other part or component or there may be a central part or component at the same time. The terms "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0017] In a specific embodiment, Figure 1As shown, a surgical electrode for ablation electrode with telescopic function comprises a shell 1, a spring 5 is fixedly installed in the shell 1, an outer needle tube 3 with one end penetrating the shell 1 is movably installed in the shell 1, the outer wall of the outer needle tube 3 is sleeved with a rubber sleeve 4, the side wall of the rubber sleeve 4 abuts against the spring 5, a straight hole 9 is provided on the outer needle tube 3, a strip hole 10 is provided on the shell 1, an inner needle tube 7 is movably installed in the outer needle tube 3, a short lever 11 with one end extending to the outside of the shell 1 through the straight hole 9 and the strip hole 10 is fixedly installed on the side wall of the inner needle tube 7, a long lever 13 with one end extending to the outside of the shell 1 through the strip hole 10 and located on the side of the short lever 11 away from the spring 5 is fixedly installed on the side wall of the outer needle tube 3, a needle 16 is fixedly installed on the end of the inner needle tube 7 located on the outside of the shell 1, and a plurality of needle threads 14 evenly distributed around the inner needle tube 7 are movably installed in the outer needle tube 3.

[0018] The friction force between the rubber sleeve 4 and the outer needle tube 3 is greater than the elastic deformation force of the spring 5 .

[0019] In this embodiment, a fixing ring 2 is fixedly installed in the shell 1, one end of the spring 5 is fixedly installed on the fixing ring 2, and the outer needle tube 3 passes through the spring 5 and the fixing ring 2, so that the spring 5 wraps the outer needle tube 3, so that the thrust applied by the spring 5 on the outer needle tube 3 through the rubber sleeve 4 is more uniform.

[0020] In this embodiment, the housing 1 is composed of an upper and a lower part fixed by screws, that is, the housing 1 can be disassembled.

[0021] More specifically, the end of the spring 5 away from the fixed ring 2 is fixedly mounted with a movable ring 6, and the side of the movable ring 6 away from the spring 5 is fixedly mounted with a truncated cone ring 15, the truncated cone ring 15 is composed of two half cones, the two half cones form a cone and there is a gap between them, the two half cones wrap the rubber sleeve 4, the outer wall of the truncated cone ring 15 is provided with a thread, the outer wall of the truncated cone ring 15 is connected with a nut 8 with an inclined inner wall through the thread matching the outer wall of the truncated cone ring 15, and when the nut 8 rotates in the direction of increasing the diameter of the truncated cone ring 15, the truncated cone ring 15 presses the rubber sleeve 4 to increase the friction between the rubber sleeve 4 and the outer needle tube 3. It is ensured that the friction between the rubber sleeve 4 and the outer needle tube 3 is greater than the elastic deformation force of the spring 5, so that the outer needle tube 3 preferentially compresses the spring 5 when moving, and the rubber sleeve 4 and the outer needle tube 3 start to move again after the spring 5 is compressed to the limit.

[0022] According to actual needs, the above-mentioned surgical electrode for ablation electrode with telescopic function can be further optimized and / or improved:

[0023] The end of the needle 16 close to the inner needle tube 7 is arc-shaped, so that after the outer needle tube 3 is separated from the side of the needle 16, the plurality of needle threads 14 pass through the arc surface of the needle 16 and open in a direction away from the needle 16.

[0024] The length of the linear hole 9 matches the telescopic length of the spring 5, so that the spring 5 will not drive the inner needle tube 7 to move through the short lever 11 when pushing the outer needle tube 3 to move.

[0025] In this embodiment, resistance-increasing pads 12 are fixedly installed on the opposite sides of the short lever 11, and the two resistance-increasing pads 12 are respectively in contact with the opposite side walls of the strip hole 10, thereby increasing the friction between the short lever 11 and the shell 1, that is, increasing the friction between the inner needle tube 7 and the shell 1, so that the outer needle tube 3 will not drive the inner needle tube 7 to move relative to it when it moves, thereby ensuring that the outer needle tube 3 can be relatively displaced with the inner needle tube 7.

[0026] To sum up: during the operation, the outer needle tube 3 and the needle 16 are driven by the long lever 13 to penetrate into the body, and the spring 5 is compressed by the friction between the rubber sleeve 4 and the inner needle tube 7. After the spring 5 is compressed to the limit, the static friction between the outer needle tube 3 and the rubber sleeve 4 is broken and slides, so that the outer needle tube 3 is further penetrated into the body, ensuring that the outer needle tube 3 has a sufficient movable stroke. After the needle 16 contacts the tumor, it is only necessary to release the long lever 13 so that the thrust of the spring 5 to restore the elastic deformation pushes the outer needle tube 3 to move a distance outside the body through the rubber sleeve 4, so that the outer needle tube 3 is separated from the side of the needle 16, and the restriction on the needle thread 14 is released, so that the needle thread 14 is opened outward in an umbrella shape. The whole operation only needs to control and push the long lever 13, and no other operations are required. It is very simple and fast to use and convenient for surgery.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A surgical electrode for ablation with telescopic function, characterized in that: The invention comprises a shell (1), a spring (5) is fixedly installed in the shell (1), an outer needle tube (3) having one end penetrating the shell (1) is movably installed in the shell (1), a rubber sleeve (4) is sleeved on the outer wall of the outer needle tube (3), the side wall of the rubber sleeve (4) abuts against the spring (5), a straight hole (9) is provided on the outer needle tube (3), a strip hole (10) is provided on the shell (1), an inner needle tube (7) is movably installed in the outer needle tube (3), and one end is fixedly installed on the side wall of the inner needle tube (7) A short lever (11) extends to the outside of the housing (1) through the straight hole (9) and the strip hole (10); a long lever (13) is fixedly mounted on the side wall of the outer needle tube (3); one end of the long lever (13) extends to the outside of the housing (1) through the strip hole (10) and is located on the side of the short lever (11) away from the spring (5); a needle (16) is fixedly mounted on one end of the inner needle tube (7) located on the outside of the housing (1); and a plurality of needle threads (14) evenly distributed around the inner needle tube (7) are movably mounted inside the outer needle tube (3).

2. The surgical electrode for ablation electrode with telescopic function according to claim 1, characterized in that: The housing (1) consists of an upper and a lower part fixed by screws.

3. The surgical electrode for ablation electrode with telescopic function according to claim 2, characterized in that: A movable ring (6) is fixedly mounted on one end of the spring (5), and a truncated cone ring (15) is fixedly mounted on the side of the movable ring (6) away from the spring (5). The truncated cone ring (15) is composed of two half cones, and the two half cones form a cone with a gap between them. The outer wall of the truncated cone ring (15) is provided with a thread, and the outer wall of the truncated cone ring (15) is connected to a nut (8) through a thread matching the outer wall of the truncated cone ring (15). When the nut (8) rotates in a direction in which the diameter of the truncated cone ring (15) increases, the truncated cone ring (15) is pressed against the rubber sleeve (4) to increase the friction between the rubber sleeve (4) and the outer needle tube (3).

4. The surgical electrode for ablation electrode with telescopic function according to claim 1, characterized in that: The end of the needle (16) close to the inner needle tube (7) is arc-shaped.

5. The surgical electrode for ablation electrode with telescopic function according to claim 1, characterized in that: The length of the straight hole (9) matches the telescopic length of the spring (5).

6. The surgical electrode for ablation electrode with telescopic function according to claim 1, characterized in that: Resistance-increasing pads (12) are fixedly mounted on opposite sides of the short lever (11), and the two resistance-increasing pads (12) are in contact with opposite side walls of the strip-shaped hole (10).

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