Radio frequency ablation electrode needle puncture force tester

Abstract

This utility model provides a radiofrequency ablation electrode needle puncture force tester, relating to the field of electrode needle puncture force technology. It includes: a fixed base plate; rectangular grooves at both ends of the fixed base plate; and four threaded grooves at the front and rear ends of the fixed base plate. The electrode needle is temporarily fixed within a mold cylinder. A small electric lever automatically pulls down the mold cylinder and the electrode needle, allowing the electrode needle to puncture the simulated tissue below. The test results and puncture process are displayed on a screen. This test accurately determines whether the electrode needle puncture force is qualified, effectively ensuring the reliability and safety of the electrode needle in actual clinical or industrial applications. It solves the problem that electrode needles need to puncture simulated tissue, thus requiring puncture force testing; otherwise, the puncture force may be unstable or insufficient, potentially leading to the electrode needle failing to accurately reach the puncture position.

Description

Technical Field

[0001] This utility model relates to the field of electrode needle puncture force technology, and in particular to a radiofrequency ablation electrode needle puncture force tester. Background Technology

[0002] Radiofrequency ablation is a crucial technique in minimally invasive tumor treatment. It involves percutaneously inserting an electrode needle into the lesion tissue, using a high-frequency alternating current to generate heat through intense friction between ions within the tissue, leading to coagulative necrosis and achieving the therapeutic goal. The effective implementation of this technique heavily relies on the electrode needle's ability to successfully, accurately, and safely reach the target site. Issues such as tissue damage, needle deviation, electrode needle deformation, or breakage during the puncture process are all closely related to the electrode needle's puncture mechanical properties. Puncture force is a key mechanical indicator for evaluating electrode needle performance, directly reflecting the dynamic changes in resistance encountered when the electrode needle penetrates different biological media such as skin, fat, muscle, and even tumor tissue. Currently, during electrode needle puncture testing, the puncture force needs to be tested because the electrode needle needs to puncture simulated tissue. Otherwise, unstable or insufficient puncture force may result in the electrode needle failing to accurately reach the puncture site. Utility Model Content

[0003] This utility model relates to a radiofrequency ablation electrode needle puncture force tester. The electrode needle is temporarily fixed and restricted in a mold cylinder. A small electric lever automatically pulls down the mold cylinder and the electrode needle, which then performs a puncture test on the simulated tissue below. The test results and puncture process are displayed on the screen. This test accurately determines whether the electrode needle puncture force is qualified, which can effectively ensure the reliability and safety of the electrode needle in actual clinical or industrial applications. It avoids problems such as excessive tissue damage due to excessive puncture force or failure to complete the puncture operation due to insufficient puncture force. At the same time, it can promptly screen out unqualified products, reduce the risk of failure and safety hazards in subsequent use, and provide accurate data support for the optimization of the electrode needle manufacturing process.

[0004] The radiofrequency ablation electrode needle puncture force tester provided by this utility model specifically includes: a fixed base plate; rectangular grooves are respectively opened at both ends of the fixed base plate; four threaded grooves are respectively opened at the front and rear ends of the fixed base plate; a mutually symmetrical support frame is fixedly installed on the upper end of the fixed base plate; a fixing frame is fixedly installed at the two rectangular grooves of the fixed base plate, and a fixing hole is opened at the rear end of the upper end of the fixing frame; a through circular hole is opened in the middle of the upper end of the fixing frame. A through mold cylinder is slidably inserted into the circular hole of the fixed frame; symmetrical vertical sliding grooves are provided on the annular sidewall of the mold cylinder; an extension plate is fixedly installed on the outer side of the mold cylinder; an anti-detachment plate is fixedly installed on the bottom of the mold cylinder; lugs are fixedly installed at both ends of the mold cylinder, and through screws are inserted in the middle of the lugs; a through electrode needle is installed at the lower end of the inner cavity of the mold cylinder, and a limiting plate is installed at the front end of the tip of the electrode needle; threaded holes are provided at both ends of the limiting plate.

[0005] Furthermore, side plates are fixedly installed on the outer sides of the lower ends of the two support frames, and through bolts are inserted at both ends of the side plates. Bearing plates are fixedly installed on the upper ends of the two support frames.

[0006] Furthermore, positioning plates are fixedly installed on the upper ends of the two bearing plates respectively, and parallel guide grooves are opened on the top ends of the two bearing plates respectively. Side wall blocks are fixedly installed on the front ends of the two bearing plates respectively, and through threaded holes are opened in the middle of the side wall blocks.

[0007] Furthermore, threaded rods are rotatably inserted into the threaded holes of the two sidewall blocks, and bearing rings are fixedly installed at the rear ends of the threaded rods.

[0008] Furthermore, clamping plates are fixedly installed on the outer rings at the rear ends of the two bearing rings, and symmetrical guide blocks are fixedly installed on the bottom of the clamping plates. Industrial cameras are installed on the bottom of the upper ends of the two support frames.

[0009] Furthermore, symmetrical vertical sliders are fixedly installed on the inner sidewall of the central circular hole of the fixed frame, a display screen is installed on the top of the fixed frame, and a small electric rod is fixedly installed in the fixing hole of the fixed frame.

[0010] This utility model provides a radiofrequency ablation electrode needle puncture force tester, which has the following beneficial effects: 1. In the present invention, when the testing instrument is in use, the electrode needle is temporarily fixed and restricted in the mold cylinder. The small electric rod automatically pulls down the mold cylinder and the electrode needle, and the electrode needle will perform a puncture test on the simulated tissue below. The test results and puncture process are displayed on the screen. This test can accurately determine whether the electrode needle puncture force is qualified, which can effectively ensure the reliability and safety of the electrode needle in actual clinical or industrial applications. It avoids problems such as excessive tissue damage and instrument breakage due to excessive puncture force, or failure to complete the puncture operation due to insufficient puncture force. At the same time, it can promptly screen out unqualified products, reduce the risk of failure and safety hazards in subsequent use, and provide accurate data support for the optimization of the electrode needle production process.

[0011] 2. The main advantage of this invention, which uses clamping and positioning plates to hold and fix both ends of the simulated tissue, is that it provides a highly stable and repeatable experimental environment for puncture testing. This rigid fixation method prevents displacement or slippage of the simulated tissue under the force of the electrode needle puncture, effectively eliminating experimental errors caused by sample movement and ensuring consistent boundary conditions for each puncture test. This is crucial for studying puncture force, tissue deformation, needle trajectory, and the interaction between the needle and tissue. Attached Figure Description

[0012] To more clearly illustrate the technical solution of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] In the attached diagram: Figure 1 This is a schematic diagram of the left front upper axis view structure of this application; Figure 2 This is a schematic diagram of the disassembled structure of the fixed base plate and support frame of this application; Figure 3 This is a schematic diagram of the disassembled structure of the small electric rod and mold cylinder of this application; Figure 4 This is a schematic diagram of the exploded structure of this application; List of reference numerals in the attached diagram: 1. Fixed base plate; 2. Support frame; 201. Side plate; 202. Bearing plate; 203. Positioning plate; 204. Guide groove; 205. Side wall block; 206. Threaded rod; 207. Bearing ring; 208. Clamping plate; 209. Guide block; 210. Industrial camera; 3. Fixed frame; 301. Vertical slider; 302. Display screen; 303. Small electric rod; 4. Mold cylinder; 401. Vertical slide groove; 402. Extension plate; 403. Anti-detachment plate; 404. Ear block; 405. Electrode needle; 406. Limiting plate. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1:

[0015] Please refer to Figures 1 to 4This utility model proposes a radiofrequency ablation electrode needle puncture force tester, comprising: a fixed base plate 1; rectangular grooves are respectively opened at both ends of the fixed base plate 1; four threaded grooves are respectively opened at the front and rear ends of the fixed base plate 1; mutually symmetrical support frames 2 are fixedly installed on the upper end of the fixed base plate 1; fixed frames 3 are fixedly installed at the two rectangular grooves of the fixed base plate 1, and fixed holes are opened at the rear end of the upper end of the fixed frames 3; a through circular hole is opened in the middle of the upper end of the fixed frames 3; the distance between the two support frames 2 is located directly below the circular hole at the upper end of the fixed frames 3; mutually symmetrical vertical sliders 301 are fixedly installed on the inner side wall of the circular hole in the middle of the fixed frames 3, and the vertical sliders 301 are slidably installed in the vertical sliding grooves 401. When the mold cylinder 4 slides up and down, the vertical sliding grooves 401 on the mold cylinder 4 are restricted by the vertical sliders 301, and the mold cylinder 4 can only slide up and down, preventing the mold cylinder 4 from shifting or tilting when sliding up and down. A display screen 302 is mounted on the top of the fixed frame 3. A small electric rod 303 is fixedly installed in the fixing hole of the fixed frame 3. The top of the small electric rod 303 is fixedly connected to the bottom of the extension plate 402. The small electric rod 303 is used to push the extension plate 402 and the mold cylinder 4 upward. Then, the electrode needle 405 is installed in the mold cylinder 4. Next, the small electric rod 303 is used to pull the mold cylinder 4 downward. At this time, the electrode needle 405 will also slide downward. The electrode needle 405 slides downward and uses the needle tip to puncture the simulated tissue below, thereby testing the puncture force of the lower end of the electrode needle 405. A through-hole mold cylinder 4 is slidably inserted into the circular hole of the fixing frame 3. Before testing the piercing force of the electrode needle 405, the electrode needle 405 is inserted into the mold cylinder 4 and slid downwards, so that one side of the upper end of the electrode needle 405 is stuck on the anti-detachment plate 403 at the bottom of the mold cylinder 4, while the lower end of the electrode needle 405 penetrates the lower end of the mold cylinder 4. Then, a limiting plate 406 is temporarily fixedly installed on the mold cylinder 4 using screws, and the bottom of the inner side wall of the limiting plate 406 is used to press down and limit the top end of the electrode needle 405 to prevent the lower end of the electrode needle 405 from moving upwards during piercing. The annular side wall of the mold cylinder 4 has symmetrical vertical sliding grooves 401. An extension plate 402 is fixedly installed on the outer side of the mold cylinder 4, and an anti-detachment plate 403 is fixedly installed on the bottom of the mold cylinder 4. The upper end of the electrode needle 405 is stuck on the anti-detachment plate 403 to prevent the electrode needle 405 from sliding out from the lower end of the mold cylinder 4. Ear blocks 404 are fixedly installed at both ends of the mold cylinder 4, and a through screw is inserted in the middle of the ear block 404; the screw on the ear block 404 is rotated and inserted into the threaded hole of the limiting plate 406, temporarily fixing the limiting plate 406 and the mold cylinder 4. A through electrode needle 405 is installed at the lower end of the inner cavity of the mold cylinder 4, and the limiting plate 406 is installed at the front end of the tip of the electrode needle 405; threaded holes are opened at both ends of the limiting plate 406.

[0016] Side plates 201 are fixedly installed on the outer sides of the lower ends of the two support frames 2, and through bolts are inserted at both ends of the side plates 201. The bolts on the side plates 201 are rotated and inserted into the threaded grooves of the fixed base plate 1 to fix and restrict the side plates 201 and the support frames 2. The support frames 2 will not move when touched, so the support frames 2 can stably support the simulated tissue. The upper ends of the two support frames 2 are fixedly installed with bearing plates 202, and the upper ends of the two bearing plates 202 are fixedly installed with positioning plates 203. The two ends of the simulated tissue are placed on the two bearing plates 202. Then, the rear side of the simulated tissue is placed against the front side of the positioning plate 203. Then, the front end of the threaded rod 206 is grasped and rotated to push the clamping plate 208 backward. The rear side of the clamping plate 208 is used to push the simulated tissue backward. The clamping plate 208 and the positioning plate 203 are used to clamp and fix the two ends of the simulated tissue. When the simulated tissue is subjected to puncture force by the electrode needle 405, it will not displace. The tops of the two support plates 202 are respectively provided with parallel guide grooves 204. Side wall blocks 205 are fixedly installed at the front ends of the two support plates 202, and through threaded holes are opened in the middle of the side wall blocks 205. Through threaded rods 206 are rotatably inserted into the threaded holes of the two side wall blocks 205, and bearing rings 207 are fixedly installed at the rear ends of the threaded rods 206. Clamping plates 208 are fixedly installed on the outer rings at the rear ends of the two bearing rings 207, and symmetrical guide blocks 209 are fixedly installed at the bottom of the clamping plates 208. The guide blocks 209 are slidably installed in the guide grooves 204. When the clamping plates 208 slide back and forth, the guide blocks 209 are restricted by the guide grooves 204, and the clamping plates 208 can only slide back and forth, preventing the clamping plates 208 from shifting or tilting during sliding, thus ensuring that the clamping plates 208 can firmly clamp the simulated tissue. Industrial cameras 210 are installed at the bottom of the upper end of the two support frames 2 respectively. When the lower end of the electrode needle 405 punctures and penetrates the simulated tissue, the industrial camera 210 will take a picture of it and then transmit the shooting process and results to the display screen 302. The display screen 302 can be used to determine whether the puncture force of the electrode needle 405 is qualified. Example 2:

[0017] Based on Example 1, such as Figure 1 and Figure 4 As shown, side plates 201 are fixedly installed on the outer side of the lower end of the two support frames 2, and through bolts are inserted at both ends of the side plates 201. After removing the side plates 201 and bolts, the support frames 2 are fixedly welded to the fixed base plate 1 to stabilize and restrict the support frames 2. In this way, the support frames 2 will not tilt when touched, avoiding the bolts from loosening and failing to stabilize the support frames 2 after long-term use, and also saving the cost of parts.

[0018] Before testing the puncture force of the electrode needle 405, the electrode needle 405 is first inserted into the mold cylinder 4 and slid downwards, so that one side of the upper end of the electrode needle 405 is stuck on the anti-dislodgement plate 403 at the bottom of the mold cylinder 4. The lower end of the electrode needle 405 penetrates the lower end of the mold cylinder 4. Then, the limiting plate 406 is temporarily fixed to the mold cylinder 4 using screws. The bottom of the inner wall of the limiting plate 406 is used to press down and limit the top end of the electrode needle 405 to prevent the lower end of the electrode needle 405 from moving upwards during puncture. The two ends of the simulated tissue are placed on the two support plates 202, and then the rear side of the simulated tissue is placed against the front side of the positioning plate 203. Then, the front end of the threaded rod 206 is grasped and rotated to push the clamping plate 208 backwards. The rear side of the clamping plate 208 is used to push the simulated tissue backwards, and the clamping plate 208 and the positioning plate 203 are used to clamp and fix the two ends of the simulated tissue. When the simulated tissue is subjected to puncture force by the electrode needle 405, it will not displace. Using a small electric lever 303 to pull the mold cylinder 4 downwards, the electrode needle 405 will also slide downwards, puncturing the simulated tissue below with its needle tip. When the lower end of the electrode needle 405 punctures and penetrates the simulated tissue, the industrial camera 210 will capture the process and transmit the results to the display screen 302. The display screen 302 will then show whether the puncture force of the electrode needle 405 is qualified.

[0019] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient indicators of all components are based on their own technologies, and any method that achieves the desired effect can be implemented. The display screen 302 and the small electric pole 303 mentioned above are common market components; upon purchase and use, simply connect them according to the instruction manual provided with the device, and therefore will not be elaborated upon further.

[0020] The technical solution of this utility model is not limited to the scope of the embodiments of this utility model. All technical contents not described in detail in this utility model are known technologies.

Claims

1. Radiofrequency ablation electrode needle puncture force tester, including: A fixed base plate (1); rectangular grooves are respectively opened at both ends of the fixed base plate (1); four threaded grooves are respectively opened at the front and rear ends of the fixed base plate (1); a symmetrical support frame (2) is fixedly installed on the upper end of the fixed base plate (1); a fixed frame (3) is fixedly installed at the two rectangular grooves of the fixed base plate (1), and a fixed hole is opened at the rear end of the upper end of the fixed frame (3); a through round hole is opened in the middle of the upper end of the fixed frame (3); characterized in that the fixed frame ( 3) A through mold cylinder (4) is slidably inserted into the round hole; an anti-detachment plate (403) is fixedly installed at the bottom of the mold cylinder (4); ear blocks (404) are fixedly installed at both ends of the mold cylinder (4), and a through screw is inserted in the middle of the ear block (404); a through electrode needle (405) is installed at the lower end of the inner cavity of the mold cylinder (4), and a limiting plate (406) is installed at the front end of the top of the electrode needle (405); threaded holes are opened at both ends of the limiting plate (406).

2. The radiofrequency ablation electrode needle puncture force tester according to claim 1, characterized in that: Side plates (201) are fixedly installed on the outer side of the lower end of the two support frames (2), and through bolts are inserted at both ends of the side plates (201). Bearing plates (202) are fixedly installed on the upper end of the two support frames (2).

3. The radiofrequency ablation electrode needle puncture force tester according to claim 2, characterized in that: Positioning plates (203) are fixedly installed on the upper ends of the two bearing plates (202), and guide grooves (204) that are parallel to each other are opened on the top ends of the two bearing plates (202). Side wall blocks (205) are fixedly installed on the front ends of the two bearing plates (202), and threaded holes are opened in the middle of the side wall blocks (205).

4. The radiofrequency ablation electrode needle puncture force tester according to claim 3, characterized in that: A through threaded rod (206) is rotatably inserted into the threaded hole of each of the two sidewall blocks (205), and a bearing ring (207) is fixedly installed at the rear end of the threaded rod (206).

5. The radiofrequency ablation electrode needle puncture force tester according to claim 4, characterized in that: Clamping plates (208) are fixedly installed on the outer rings at the rear ends of the two bearing rings (207), and symmetrical guide blocks (209) are fixedly installed on the bottom of the clamping plates (208). Industrial cameras (210) are installed on the bottom of the upper ends of the two support frames (2).

6. The radiofrequency ablation electrode needle puncture force tester according to claim 1, characterized in that: Symmetrical vertical sliders (301) are fixedly installed on the inner side wall of the central circular hole of the fixed frame (3), a display screen (302) is installed on the top of the fixed frame (3), and a small electric rod (303) is fixedly installed in the fixing hole of the fixed frame (3).

7. The radiofrequency ablation electrode needle puncture force tester according to claim 1, characterized in that: The mold cylinder (4) has symmetrical vertical sliding grooves (401) on its annular sidewall, and an extension plate (402) is fixedly installed on the outer side of the mold cylinder (4).

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