Four-needle ablation electrode with adjustable needle head length

Abstract

The four-needle ablation electrode comprises a movable electrode part, a shell part, a guide positioning groove and a positioning part, an opening is formed in the head of the shell part, the movable electrode part is movably installed in the shell part, the head of the movable electrode part penetrates out of the opening of the shell part, and the guide positioning groove is formed in the positioning part. The positioning part is installed on the outer side of the movable electrode part, the guide positioning groove is formed in the shell part and communicated with an inner cavity of the shell part, the positioning part penetrates through the guide positioning groove, and the position state of the movable electrode part is adjusted through cooperation between the positioning part and the guide positioning groove. According to the four-needle ablation electrode, the movable electrode part, the shell part, the guide positioning groove and the positioning part are arranged in a matched mode, so that when the four-needle ablation electrode is used, a medical worker can quickly and conveniently adjust the extending length of a needle head, and the situation that the sight of a doctor is interfered due to the fact that the extending distance of the needle head is not long during an operation can be avoided; and the risk in the operation process is reduced.

Description

Technical Field

[0001] This application relates to the technical field of ablation electrodes, and particularly to a four-needle ablation electrode with adjustable needle length. Background Art

[0002] The four-needle ablation electrode utilizes the principle of arc discharge of the current thermal effect to transmit the arc waveform from the high-frequency electrotome host generator to an extremely tiny acting part, generating heat on the skin surface through the electrode needles, and can perform surgical operations at extremely low power. The ablation electrode destroys abnormal tissues or tumor cells by generating heat. Because the discharge site is concentrated, it enables precise cutting of human tissues.

[0003] Common four-needle ablation electrodes generally have a fixed needle length and cannot adjust the needle length. The distance that the needle extends out is not long, which easily interferes with the doctor's line of sight during the operation, resulting in risks during the operation process and also making it impossible to guarantee the cutting effect. Summary of the Invention

[0004] In order to improve the problem that the four-needle ablation electrode has a fixed needle length and cannot adjust the needle length, which easily interferes with the doctor's line of sight during the operation, this application provides a four-needle ablation electrode with adjustable needle length.

[0005] A four-needle ablation electrode with adjustable needle length provided by this application adopts the following technical solution: A four-needle ablation electrode with adjustable needle length includes a movable electrode part, a housing part, a guiding and positioning groove, and a positioning part. An opening is formed at the head of the housing part. The movable electrode part is movably installed in the housing part, and the head of the movable electrode part passes through the opening of the housing part. The positioning part is installed on the outside of the movable electrode part. The guiding and positioning groove is opened on the housing part and communicates with its inner cavity. The positioning part passes through the guiding and positioning groove, and the movable electrode part adjusts its position state by means of the limiting and guiding cooperation between the positioning part and the guiding and positioning groove.

[0006] Furthermore, the housing part includes an outer cylinder, a steel pipe group, and a plug. The steel pipe group is fixedly connected to the head of the outer cylinder, and the plug is fixedly connected to the tail of the outer cylinder. An inner cavity for accommodating the movable electrode part is provided in the outer cylinder, and an opening is formed at the head of the steel pipe group, so that the head of the movable electrode part can pass through the opening of the steel pipe group.

[0007] Furthermore, the movable electrode part includes a stainless steel needle group and an inner cylinder. The stainless steel needle group is fixedly connected to the head of the inner cylinder. The inner cylinder is slidably arranged in the inner cavity of the outer cylinder, and the stainless steel needle group movably passes through the steel pipe group.

[0008] Furthermore, the guiding and positioning groove is formed on the outer wall of the outer cylinder, and the guiding and positioning groove includes a guiding section axially opened along the outer cylinder and four limiting sections radially opened along the outer cylinder. The four limiting sections are all communicated with the guiding section, the four limiting sections are equally spaced, and the interval between every two adjacent limiting sections is 10 mm.

[0009] Furthermore, the positioning part includes a sliding switch, a small clamping rod and a sliding block. The sliding block and the sliding switch are fixedly connected by the small clamping rod, and the connection part between the sliding block and the sliding switch movably passes through the guiding and positioning groove. The outer edge of the sliding switch is located outside the outer cylinder, the inner edge of the sliding block is located inside the outer cylinder. The inner edge of the sliding switch and the outer edge of the sliding block are respectively arranged as a tubular protrusion with an opening at the center and a columnar protrusion with an opening at the center, and the columnar protrusion extends into the tubular protrusion. The outer diameter of the tubular protrusion is adapted to the width of the guiding section and the width of the limiting section.

[0010] Furthermore, the stainless steel needle group includes four stainless steel needles, the steel pipe group includes four steel pipes, each stainless steel needle movably passes through a steel pipe, and the distance between every two adjacent stainless steel needles is equal.

[0011] Furthermore, the four-needle ablation electrode with adjustable needle length further includes four heat shrinkable tubes. Each heat shrinkable tube is sleeved on the head of a steel pipe, and the stainless steel needle passes through the heat shrinkable tube.

[0012] Furthermore, the four-needle ablation electrode with adjustable needle length further includes a cable with a plug. The cable with a plug passes through the plug, and the head of the cable with a plug extends into the inner cylinder and is connected to the stainless steel needle group.

[0013] The beneficial technical effects of this application are as follows: 1. Through the cooperative setting of the movable electrode part, the outer shell part, the guiding and positioning groove and the positioning part, when the four-needle ablation electrode is used, medical staff can quickly and conveniently adjust the protruding length of the needle, so as to avoid the interference of the doctor's line of sight caused by the insufficient protruding distance of the needle during the operation, and reduce the risks existing in the operation process.

[0014] 2. Through the cooperative setting of the guiding and positioning groove and the positioning part structure, the adjustment process is intuitive and easy to operate. The doctor only needs to observe the position of the sliding switch in the guiding and positioning groove to judge the protruding length of the stainless steel needle group, which greatly simplifies the operation process of the operation.

[0015] 3. The four-needle ablation electrode adopts a cross-wiring design, ensuring the stability and uniformity of energy transfer. This design reduces the uncertainty during the operation, improves the success rate of the operation and the safety of the patient. At the same time, the use of the heat-shrinkable sleeve masks the gap between the steel pipe opening and the stainless steel needle, effectively preventing the entry of external impurities and further improving the stability and reliability of the electrode.

[0016] 4. The ablation electrode has four length adjustment modes, which can meet the requirements of various surgical scenarios. Whether deep ablation or shallow treatment is needed, doctors can achieve it by adjusting the length of the needle tip. Moreover, after the operation or when not in use, doctors can push the sliding switch to the end and turn it clockwise to completely retract the stainless steel needle into the steel pipe and fix it. This design effectively avoids the risk of injury caused by the accidental protrusion of the needle tip and improves the safety of the operation. Description of the Drawings

[0017] Figure 1 is a cross-sectional view of a four-needle ablation electrode with adjustable needle tip length according to an embodiment of the present application; Figure 2 is Figure 1 the front view of the four-needle ablation electrode with adjustable needle tip length in Figure 3 is Figure 2 the structural schematic diagram of the four-needle ablation electrode with adjustable needle tip length at the plug cable in Figure 4 is the front view of the sliding switch in an embodiment of the present application; Figure 5 is Figure 4 the bottom view of the sliding switch in Figure 6 is Figure 4 the cross-sectional view of the sliding switch at A-A in Figure 7 is the front view of the sliding block in an embodiment of the present application; Figure 8 is Figure 7 the top view of the sliding block in Figure 9 is Figure 8 the cross-sectional view of the sliding block at A-A in Figure 10 is the front view of the inner cylinder in an embodiment of the present application; Figure 11 is Figure 10 the cross-sectional view of the inner cylinder at A-A in Figure 12 is Figure 10 the side view of the inner cylinder in Figure 13 is the front view of the outer cylinder in an embodiment of the present application; Figure 14 is Figure 13 The sectional view of the middle and outer cylinders at A-A; Figure 15 is Figure 13 The side view of the middle and outer cylinders; Figure 16 is the front view of the plug in the embodiment of the present application; Figure 17 is Figure 16 The sectional view of the plug at A-A.

[0018] Reference numerals: 1, stainless steel needle group; 2, heat shrinkable sleeve; 3, steel pipe group; 4, sliding switch; 5, small clamping rod; 6, sliding block; 7, inner cylinder; 8, outer cylinder; 9, plug; 10, cable with plug. Detailed implementation manners

[0019] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] The embodiment of the present application discloses a four-needle ablation electrode with adjustable needle length. Refer to Figure 1 and Figure 2 , the four-needle ablation electrode with adjustable needle length includes a movable electrode part, a housing part, a guiding and positioning groove, and a positioning part. The movable electrode part is movably installed in the housing part, and the head of the movable electrode part penetrates through the opening of the housing part. The positioning part is installed on the outside of the movable electrode part, the guiding and positioning groove is opened on the housing part and communicates with its inner cavity, and the positioning part passes through the guiding and positioning groove. During adjustment, the positioning part can be pushed to move or deflect in the guiding and positioning groove, so that the movable electrode part adjusts its position state by using the limiting and guiding cooperation between the positioning part and the guiding and positioning groove, and further adjusts the length of the needle part of the four-needle ablation electrode extending out.

[0021] Referring to Figure 1 , the housing part includes an outer cylinder 8, a steel pipe group 3, and a plug 9. The steel pipe group 3 is fixedly connected to the head of the outer cylinder 8, and the plug 9 is clamped and connected to the tail of the outer cylinder 8. An inner cavity for accommodating the movable electrode part is provided in the outer cylinder 8, and an opening is formed at the head of the steel pipe group 3, so that the head of the movable electrode part can penetrate through the opening of the steel pipe group 3. Referring to Figure 3 , Figure 16 and Figure 17 , an opening is also provided at the center of the plug 9, so that the cable 10 with a plug can pass through the plug 9, so that the head of the cable 10 with a plug can be extended into the inner cylinder 7 and connected to the stainless steel needle group 1, and the tail plug of the cable 10 with a plug is inserted into the main machine socket for use.

[0022] Refer to Figure 1 , the movable electrode part includes a stainless - steel needle group 1 and an inner cylinder 7. The stainless - steel needle group 1 is fixedly connected to the head of the inner cylinder 7, and the inner cylinder 7 is slidably arranged in the inner cavity of the outer cylinder 8, and the stainless - steel needle group 1 can movably pass through the steel pipe group 3.

[0023] In this embodiment, the stainless - steel needle group 1 includes four stainless - steel needles, and the steel pipe group 3 includes four steel pipes corresponding to the stainless - steel needle group 1. The distance between every two adjacent stainless - steel needles is equal, and each stainless - steel needle movably passes through a steel pipe. The distance between adjacent two needles of the four - needle ablation electrode is equal, and a cross - wiring design is adopted, making the ablation electrode more stable and reliable during use. Stable energy transfer can ensure the uniformity and consistency of the ablation process, reduce the uncertainty during the operation, thereby improving the success rate of the operation and the safety of the patient. In addition, the cross - wiring can also help the doctor better monitor the changes during the treatment process and ensure that the ablation effect meets the expectations.

[0024] In this embodiment, a heat - shrinkable sleeve 2 can be sleeved on the head of each steel pipe, and the stainless - steel needle passes through the heat - shrinkable sleeve 2. The heat - shrinkable sleeve 2 can mask the gap between the opening of the steel pipe and the stainless - steel needle, reducing the entry of external impurities.

[0025] Refer to Figures 13 to 15 , a guiding and positioning groove is formed on the outer wall of the outer cylinder 8. The guiding and positioning groove includes a guiding section axially opened along the outer cylinder 8 and four limiting sections radially opened along the outer cylinder 8. The four limiting sections are all communicated with the guiding section, and the four limiting sections are equally spaced along the length direction of the guiding section. The interval between every two adjacent limiting sections can be set to 10 mm or other interval lengths.

[0026] Refer to Figures 4 to 12 , the positioning part is installed on the inner cylinder 7 of the movable electrode part, and the positioning part includes a sliding switch 4, a small clamping rod 5, and a sliding block 6. The sliding block 6 and the sliding switch 4 are fixedly connected by the small clamping rod 5, and the connection part between the sliding block 6 and the sliding switch 4 movably passes through the guiding and positioning groove. The outer edge of the sliding switch 4 is located outside the outer cylinder 8, and the inner edge of the sliding block 6 is located inside the outer cylinder 8, so that the whole positioning part can translate along the length direction of the guiding section of the guiding and positioning groove or deflect along the limiting section of the guiding and positioning groove. When the positioning part moves along the guiding section, the extending length of the stainless - steel needle group 1 in the movable electrode part can be adjusted, and after adjusting the extending length of the stainless - steel needle group 1, the positioning part can be deflected along the limiting section, thereby limiting the position of the stainless - steel needle group 1 in the movable electrode part, so that it can have four length - adjustment modes.

[0027] In this embodiment, the inner edge of the sliding switch 4 and the outer edge of the sliding block 6 are respectively provided with a tubular protrusion having an opening at the center and a cylindrical protrusion having an opening at the center. The cylindrical protrusion can extend into the tubular protrusion, and then a small clamping rod 5 can be used to pass through the openings of both to clamp and fixedly connect the two together. The outer diameter of the tubular protrusion is adapted to the width of the guiding section and the width of the limiting section so that it can move in the guiding positioning groove.

[0028] When using the four-needle ablation electrode with adjustable needle length, pushing the sliding switch 4 can move back and forth, clockwise or counterclockwise along the guiding positioning groove opened on the outer cylinder 8. When rotating, the connection between the sliding switch 4 and the sliding block 6 can be stuck with the corresponding limiting section in the guiding positioning groove of the outer cylinder 8. The tip extension length of the stainless steel needle group 1 can be 10 mm, 20 mm, 30 mm. When not extended, the stainless steel needle is inside the steel pipe. After the needle position of the four-needle ablation electrode is stable, the on-off of the energy supply is controlled by stepping on the foot pedal of the main unit, that is, step on the foot pedal to control the operation during use; after the operation is over or when not in use, release the foot pedal, push the sliding switch to the end and rotate clockwise so that the stainless steel needle is retracted into the steel pipe and fixed.

[0029] The four-needle ablation electrode with adjustable needle length provided by this embodiment has the following advantages: High adjustability: Through the cooperation of the movable electrode part and the positioning part, the ablation electrode realizes precise adjustment of the needle length. Doctors can simply push and rotate the sliding switch according to the surgical requirements to quickly adjust the extension length of the stainless steel needle group, so as to meet the ablation requirements of different surgical sites and depths.

[0030] Simple operation: The guiding positioning groove and the positioning part structure in the design make the adjustment process intuitive and easy to operate. Doctors only need to observe the position of the sliding switch in the guiding positioning groove to judge the extension length of the stainless steel needle group, which greatly simplifies the surgical operation process.

[0031] High stability and reliability: The four-needle ablation electrode adopts a cross-wiring design to ensure the stability and uniformity of energy transfer. This design reduces the uncertainty during the operation, improves the success rate of the operation and the safety of patients. At the same time, the use of heat shrinkable sleeves masks the gap between the steel pipe opening and the stainless steel needle, effectively preventing the entry of external impurities and further improving the stability and reliability of the electrode.

[0032] Versatility: The ablation electrode has four length adjustment modes, which can meet the needs of a variety of surgical scenarios. Whether deep ablation or shallow treatment is required, doctors can achieve it by adjusting the needle length.

[0033] Safety: After the operation is completed or when it is not in use, the doctor can fully retract the stainless steel needle into the steel tube and fix it by pushing the sliding switch to the end and turning it clockwise. This design effectively avoids the risk of injury caused by accidental protrusion of the needle tip and improves the safety of the operation.

[0034] The main body of the four-needle ablation electrode can adopt the existing equipment in the prior art, which usually has the following functions: High-frequency electrical energy output: The main body can generate high-frequency electrical energy, which is transmitted to the internal tissue through the ablation electrode, generating heat energy and causing tissue necrosis through the transmission of the ablation electrode, thus achieving the ablation effect.

[0035] Control and regulation: The main body is usually equipped with a control and regulation system that allows the doctor to adjust parameters such as the output power, frequency, and time of the electrical energy according to the surgical requirements.

[0036] Safety monitoring: The main body is built-in with a safety monitoring system that can real-time monitor parameters such as current, voltage, and temperature during the operation to ensure the safety of the operation.

[0037] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A four-needle ablation electrode with adjustable needle length, characterized in that: It includes a movable electrode part, an outer shell part, a guide positioning groove and a positioning part, the head of the outer shell part is formed with an opening, the movable electrode part is movably installed in the outer shell part, and the head of the movable electrode part passes through the opening of the outer shell part, the positioning part is installed on the outside of the movable electrode part, the guide positioning groove is opened on the outer shell part and communicated with its inner cavity, the positioning part passes through the guide positioning groove, and the movable electrode part adjusts its position state by the limiting and guiding cooperation between the positioning part and the guide positioning groove.

2. A four-needle ablation electrode with adjustable needle length according to claim 1, characterized in that: The outer shell comprises an outer tube (8), a steel tube group (3), and a plug (9); the steel tube group (3) is fixedly connected to the head of the outer tube (8); the plug (9) is fixedly connected to the tail of the outer tube (8); an inner cavity for accommodating the movable electrode part is provided in the outer tube (8); and an opening is formed at the head of the steel tube group (3), so that the head of the movable electrode part can pass through the opening of the steel tube group (3).

3. A four-needle ablation electrode with adjustable needle length according to claim 2, characterized in that: The movable electrode portion comprises a stainless steel needle group (1) and an inner tube (7), wherein the stainless steel needle group (1) is fixedly connected to the head of the inner tube (7), the inner tube (7) is slidably arranged in the inner cavity of the outer tube (8), and the stainless steel needle group (1) movably passes through the steel tube group (3).

4. A four-needle ablation electrode with adjustable needle length according to claim 2, characterized in that: The guide positioning groove is formed on the outer wall of the outer cylinder (8), and comprises a guide section opened along the axial direction of the outer cylinder (8) and four limit sections opened along the radial direction of the outer cylinder (8), and the four limit sections are all connected to the guide section.

5. A four-needle ablation electrode with adjustable needle length according to claim 4, characterized in that: The four limiting segments are connected to the guide segment at equal intervals, and the interval between every two adjacent limiting segments is 10 mm.

6. A four-needle ablation electrode with adjustable needle length according to claim 4 or 5, characterized in that: The positioning portion comprises a sliding switch (4), a small clamping rod (5) and a sliding block (6); the sliding block (6) and the sliding switch (4) are clamped and connected via the small clamping rod (5); and a connection between the sliding block (6) and the sliding switch (4) moves through a guide positioning groove; an outer edge of the sliding switch (4) is located outside the outer tube (8), and an inner edge of the sliding block (6) is located inside the outer tube (8).

7. A four-needle ablation electrode with adjustable needle length according to claim 6, characterized in that: The inner edge of the sliding switch (4) and the outer edge of the sliding block (6) are respectively arranged as a tubular protrusion with an opening at the center and a cylindrical protrusion with an opening at the center, and the cylindrical protrusion extends into the tubular protrusion, and the outer diameter of the tubular protrusion is adapted to the width of the guide section and the width of the limit section.

8. The four-needle ablation electrode with adjustable needle length according to claim 3, characterized in that: The stainless steel needle group (1) comprises four stainless steel needles, and the steel tube group (3) comprises four steel tubes, each stainless steel needle moves through one steel tube, and the distance between every two adjacent stainless steel needles is equal.

9. The four-needle ablation electrode with adjustable needle length according to claim 8, characterized in that: It also comprises four heat shrinkable sleeves (2), each of the heat shrinkable sleeves (2) being sleeved on the head of a steel pipe, and the stainless steel needle passes through the heat shrinkable sleeve (2).

10. The four-needle ablation electrode with adjustable needle length according to claim 8, characterized in that: It also comprises a cable with a plug (10), wherein the cable with a plug (10) passes through the plug (9), and the head of the cable with a plug (10) extends into the inner tube (7) and is connected to the stainless steel needle group (1).

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