Ablation needle
By splitting the ablation needle into a holding part and a puncture part, and adjusting the length through a limiting part and setting an expansion element, the problem of the inability to adjust the length of existing ablation needles is solved, enabling flexible treatment and enhanced safety under complex conditions.
Patent Information
- Application Number
- CN202522825269.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-12-31
AI Technical Summary
Existing ablation needles cannot adjust the length of the active tip, making it difficult to meet diverse treatment needs in the face of complex and ever-changing clinical interventional conditions, thus limiting their wide range of clinical applications and effectiveness.
The ablation needle is divided into a holding part and a puncture part, and the total length of the two is locked by a limiting part, allowing the overall length to be actively adjusted to adapt to different application scenarios. At the same time, an expansion element is set to reduce energy diffusion and enhance stability.
It enables flexible fulfillment of diverse treatment needs under complex clinical intervention conditions, enhances the versatility and effectiveness of ablation needles, and reduces the risk of thermal damage to surrounding tissues.
Smart Images
Figure CN223873999U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to interventional surgical instrument technical field, concretely relates to a kind of ablation needle. BACKGROUND
[0002] Ablation needle is a kind of interventional minimally invasive medical instrument, and the selective destruction to target tissue is realized by physical energy (such as radio frequency, microwave or freezing), and its action principle is different due to energy type, and ablation needle is as the core tool of minimally invasive treatment, and becomes the important treatment means in solid tumor, benign lesion and medical beauty field by virtue of precision and low trauma.
[0003] The existing ablation needle cannot adjust the length of needle tip active end, and can only adjust the length by changing needle, but it is not easy to replace in the operation process, and it is inconvenient to use.The existing ablation needle is difficult to flexibly meet diversified treatment needs when facing complex and changeable clinical intervention conditions (such as anatomical structure difference of different patients, space position difference of lesion site and the like), thereby limiting the universality and effectiveness of its clinical application. UTILITY MODEL CONTENT
[0004] In view of the above problems, the application discloses an ablation needle.
[0005] An ablation needle comprises a holding part, a puncture part and a limiting part, one end of the puncture part away from the holding part is provided with an ablation unit, one end of the puncture part is inserted into the inside of the holding part and is in sliding connection with the holding part, a guide groove is arranged on the inner wall of the holding part, a guide block is arranged on the side wall of the puncture part, the guide block slides along the guide groove, one end of the limiting part is connected with the guide block, and the other end is connected with the holding part.
[0006] Further, a control part is arranged on the side wall of the holding part, a fixed electrode is arranged on the inner wall of the holding part, a sliding electrode is arranged on the side wall of the puncture part, one end of the control part is connected with the fixed electrode through a first lead wire, and the other end is connected with a power line, one end of the sliding electrode slides along the fixed electrode, and the other end is connected with the ablation unit through a second lead wire.
[0007] Further, the end of the puncture part away from the holding part is wrapped with an expansion piece, the expansion piece shields the ablation unit, and one end of the expansion piece is provided with a connecting pipe.
[0008] Further, the side wall of the end of the puncture part away from the holding part is provided with a limiting hole, and one end of the ablation unit extends out through the limiting hole.
[0009] Further, the side of the limiting hole, which faces the holding part, is detachably connected with a mounting ring, and the side of the limiting hole, which is away from the holding part, is detachably connected with a positioning ring.
[0010] Further, the expansion piece blocks the limiting hole.
[0011] Further, the limiting part comprises a limiting rod and a limiting ring; one end of the limiting rod is fixedly connected with the guide block, and the other end is detachably connected with the limiting ring; the limiting ring is in abutment with the holding part.
[0012] Further, the holding part further comprises a sliding channel; the sliding channel is located inside the guide groove; the limiting rod moves along the sliding channel; the limiting ring is in abutment with the sliding channel after entering the guide groove.
[0013] Further, a scale is arranged on the outer wall of the holding part; a pointer pointing to the scale is arranged on the limiting rod.
[0014] Further, the length of the holding part is less than the length of the puncture part.
[0015] The ablation needle has the advantages that:
[0016] The ablation needle is divided into a holding part and a puncture part, and the two parts slide relative to each other, and a limiting part is arranged to lock the total length of the holding part and the puncture part. Thus, the overall length of the ablation needle is actively adjusted to adapt to different application scene requirements. When facing complex and changeable clinical intervention conditions, the diversified treatment requirements can be flexibly met, thereby enhancing the universality and effectiveness of the ablation needle in clinical application. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a perspective view of an ablation needle according to the present application;
[0018] Figure 2 It is a perspective view of an ablation needle according to the present application; Figure 1 It is an enlarged view of the limiting part of the ablation needle;
[0019] Figure 3 It is a side view of an ablation needle according to the present application;
[0020] Figure 4 It is a side view of an ablation needle according to the present application; Figure 3 It is a sectional view of the ablation needle along A-A direction;
[0021] Figure 5 It is an enlarged view of the ablation needle; Figure 4 It is a sectional view of the ablation needle along B-B direction;
[0022] Figure 6 It is a sectional view of the ablation needle along B-B direction; Figure 3 It is a sectional view of the ablation needle along B-B direction;
[0023] In the figure, 1, holding part; 2, puncture part; 3, limiting part; 4, control part; 5, power cord; 6, ablation unit; 11, hand-held tube; 12, fixed electrode; 13, guide groove; 21, puncture tube; 22, positioning ring; 23, mounting ring; 24, expansion; 25, connecting tube; 26, sliding electrode; 27, limiting block; 31, limiting rod; 32, limiting ring; 33, slide. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.
[0025] In this document, "illustrative" means "serving as an example, instance, or illustration," and should not necessarily be construed as preferred or advantageous over other embodiments. In this document, "exemplary" means "serving as an example, instance, or illustration," and should not necessarily be construed as preferred or advantageous over other embodiments.
[0026] In order to make the drawing clear, only the parts related to the present application are schematically shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing clear and easy to understand, in some drawings, only one of the components with the same structure or function is schematically shown, or only one of them is marked.
[0027] In this document, it should be understood that the terms "length", "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0028] In this document, unless otherwise explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0029] As Figures 1-6The ablation needle shown includes a holding part 1, a puncture part 2 and a limiting part 3; the puncture part 2 is provided with an ablation unit 6 at the end away from the holding part 1; the end of the puncture part 2 is inserted into the inside of the holding part 1 and is in sliding connection with the holding part 1; the inner wall of the holding part 1 is provided with a guide groove 13; the side wall of the puncture part 2 is provided with a guide block; the guide block slides along the guide groove 13; one end of the limiting part 3 is connected with the guide block and the other end is connected with the holding part 1.
[0030] The ablation needle is divided into the holding part 1 and the puncture part 2, and the two are in relative sliding and the limiting part 3 is arranged to lock the total length of the holding part 1 and the puncture part 2. Thus, the overall length of the ablation needle is actively adjusted to adapt to different application scene requirements. When facing complex and changeable clinical intervention conditions, the diversified treatment requirements can be flexibly met, thereby enhancing the universality and effectiveness of the ablation needle in clinical application.
[0031] Specifically, the holding part 1 includes a handheld tube 11; the puncture part 2 includes a puncture tube 21. One end of the puncture tube 21 is inserted into the inside of the handheld tube 11 and the other end is sharp.
[0032] In some embodiments of the present application, the length of the handheld tube 11 is less than the length of the puncture tube 21.
[0033] As shown in the figure, Figure 2 The limiting part 3 includes a limiting rod 31 and a limiting ring 32; one end of the limiting rod 31 is fixedly connected with the guide block and the other end is threadedly connected with the limiting ring 32; the limiting ring 32 is in abutment with the handheld tube 11. When the limiting ring 32 is tightened, the limiting ring 32 will press on the outer wall of the handheld tube 11 and the puncture tube 21 will be pulled by the limiting rod 31 to press on the inner wall of the handheld tube 11, thereby enhancing the friction between the limiting ring 32, the handheld tube 11 and the puncture tube 21, so as to lock the total length of the handheld tube 11 and the puncture tube 21 by using the friction.
[0034] Further, the holding part 1 further includes a sliding channel 33; the sliding channel 33 is located in the inside of the guide groove 13; the limiting rod 31 moves along the sliding channel 33; and the limiting ring 32 is in abutment with the sliding channel 33 after entering the guide groove 13. The purpose of this design is to make part of the limiting ring 32 sink into the inside of the handheld tube 11, so as to prevent the limiting ring 32 from being loosened by mistake and avoid the limiting ring 32 from being reversed to release the limitation of the limiting part 3 on the handheld tube 11 and the puncture tube 21.
[0035] In some embodiments of the present application, the outer wall of the holding part 1 is provided with a scale; and the limiting rod 31 is provided with a pointer pointing to the scale. The total length of the handheld tube 11 and the puncture tube 21 or the length of the puncture tube 21 extending out of the handheld tube 11 can be read by the pointer pointing.
[0036] As shown in the figure, Figure 3 , 6 As shown, the side wall of the holding part 1 is provided with a control part 4; the inner wall of the holding part 1 is provided with a fixed electrode 12; the side wall of the puncture part 2 is provided with a sliding electrode 26; one end of the control part 4 is connected with the fixed electrode 12 through a first lead wire, and the other end is connected with the power line 5; one end of the sliding electrode 26 slides along the fixed electrode 12, and the other end is connected with the ablation unit 6 through a second lead wire. The sliding electrode 26 slides along the fixed electrode 12, so that the sliding electrode 26 is in communication with the fixed electrode 12. A communication circuit is formed in the holding part 1 and the puncture part 2, one end of the control part 4 is in communication with the power line 5, and the other end is in communication with the ablation unit 6 in turn through the first lead wire, the fixed electrode 12, the sliding electrode 26 and the second lead wire, so that the control part 4 can control the opening or closing of the ablation unit 6.
[0037] Specifically, the control part 4 is a push-button switch. When the control part 4 is pressed, the power line 5 is in communication with the first lead wire, and at this time the ablation unit 6 is turned on. Pressing the control part 4 again makes the power line 5 disconnected with the first lead wire, and at this time the ablation unit 6 is turned off.
[0038] Alternatively, the control part 4 is one of a rotary switch, a touch switch, a sliding switch and a dial switch.
[0039] As shown in Figure 4 , 5 As shown, the end of the puncture part 2 away from the holding part 1 is wrapped with an expansion member 24; the expansion member 24 blocks the ablation unit 6; one end of the expansion member 24 is provided with a connecting pipe 25. When used, water can be injected into the inside of the expansion member 24 through the connecting pipe 25 to drive the expansion member 24 to expand and wrap outside the ablation unit 6. The purpose of this design is:
[0040] The expansion member 24 filled with liquid can form a physical isolation layer to separate the ablation unit 6 from the surrounding normal tissue. This helps to reduce the spread of heat or energy to the surrounding tissue, reduce the risk of thermal damage to important structures such as adjacent blood vessels, nerves and organs, and effectively improve the safety of treatment.
[0041] The expansion member 24 can expand after injecting liquid, so that the puncture tube 21 is better attached to the surrounding tissue, and the overall stability is enhanced. This helps doctors to more accurately control the position and direction of the puncture tube 21 during operation.
[0042] Specifically, the connecting pipe 25 is a bellows.
[0043] In some embodiments of the present application, the connecting tube 25 is provided with a luer joint at one end away from the inflation member 24. The connecting tube 25 is connected to an injection syringe, a pressure pump or the like through the luer joint. The interior of the connecting tube 25 is provided with a luer activated valve. The luer activated valve is a valve designed based on the luer joint, which is opened or closed by inserting or pulling out the luer joint, and is commonly used in the end joint of a balloon catheter, facilitating quick connection and disconnection with an injection syringe, a pressure pump or the like.
[0044] As shown in Figure 5 The puncture part 2 is provided with a limiting hole at the side wall of one end away from the holding part 1; one end of the ablation unit 6 extends out of the limiting hole. The inflation member 24 blocks the limiting hole.
[0045] The limiting hole is detachably connected with a mounting ring 23 on the side facing the holding part 1; the limiting hole is detachably connected with a positioning ring 22 on the side away from the holding part 1. The mounting ring 23 and the positioning ring 22 are wrapped on the outer wall of the puncture tube 21. The mounting ring 23 and the positioning ring 22 fix the position of the inflation member 24 on both sides to prevent the inflation member 24 from being deviated. At the same time, the positioning ring 22 presses the ablation unit 6 against the side wall of the limiting hole to increase the friction between the ablation unit 6 and the puncture tube 21, so as to limit the position of the ablation unit 6 by using the friction.
[0046] Specifically, the mounting ring 23 is threadedly connected with the puncture tube 21. The positioning ring 22 is snap-connected with the puncture tube 21. The inner wall of the positioning ring 22 is provided with a positioning block, and the outer wall of the puncture tube 21 is provided with a positioning hole, and the positioning block is inserted into the positioning hole.
[0047] The above is only a specific embodiment of the present application, and those skilled in the art can make other improvements or modifications on the basis of the above embodiments under the above teaching of the present application. Those skilled in the art should understand that the above specific description is only for better explanation of the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An ablation needle comprising a holding portion, a puncture portion, and a limiting portion; an ablation unit is arranged at the end of the puncture portion away from the holding portion; characterized in that, One end of the puncture part is inserted into the inside of the holding part and is in sliding connection with the holding part; a guide groove is arranged on the inner wall of the holding part; a guide block is arranged on the side wall of the puncture part; the guide block slides along the guide groove; one end of the limiting part is connected with the guide block and the other end is connected with the holding part.
2. An ablation needle according to claim 1, wherein, A control part is arranged on the side wall of the holding part; a fixed electrode is arranged on the inner wall of the holding part; a sliding electrode is arranged on the side wall of the puncture part; one end of the control part is connected with the fixed electrode through a first lead wire and the other end is connected with a power line; one end of the sliding electrode slides along the fixed electrode and the other end is connected with the ablation unit through a second lead wire.
3. An ablation needle according to claim 1, wherein, The puncture part far from the holding part is wrapped with an expansion piece; the expansion piece blocks the ablation unit; one end of the expansion piece is provided with a connecting pipe.
4. An ablation needle according to claim 3, wherein, The side wall of the puncture part far from the holding part is provided with a limiting hole; one end of the ablation unit extends out through the limiting hole.
5. An ablation needle according to claim 4, wherein, A mounting ring is detachably connected to one side of the limiting hole which faces the holding part; a positioning ring is detachably connected to the side of the limiting hole which is far from the holding part.
6. An ablation needle according to claim 4, wherein, The expansion piece blocks the limiting hole.
7. An ablation needle according to claim 1, wherein, The limiting part comprises a limiting rod and a limiting ring; one end of the limiting rod is fixedly connected with the guide block and the other end is detachably connected with the limiting ring; the limiting ring abuts against the holding part.
8. An ablation needle according to claim 7, wherein, The holding part further comprises a slide; the slide is located inside the guide groove; the limiting rod moves along the slide; the limiting ring abuts against the slide after entering the guide groove.
9. An ablation needle according to claim 7, wherein, A scale is arranged on the outer wall of the holding part; a pointer which points to the scale is arranged on the limiting rod.
10. An ablation needle according to any one of claims 1-9, characterized in that, The length of the holding part is less than the length of the puncture part.