Ablation electrode and ablation support capable of achieving uniform distribution of ablation energy
By setting an insulating section at the tip of the ablation electrode, the uneven energy distribution problem caused by the tip design is solved, and the uniform distribution of ablation energy and the improvement of ablation efficiency are achieved.
Patent Information
- Application Number
- CN202421001759.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-05-09
AI Technical Summary
Existing ablation electrodes are unevenly distributed due to tip design, resulting in reduced ablation efficiency and damage to normal cells.
By setting insulating sections at the tip of the ablation electrode to avoid energy concentration, the electrode tip is designed with insulating materials or insulating coatings to achieve uniform energy distribution.
The uniform distribution of ablation energy is achieved, the ablation efficiency is improved, and the damage to normal cells is reduced.
Smart Images
Figure CN222899286U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical energy ablation treatment, and particularly relates to an ablation electrode and an ablation stent for realizing uniform energy distribution. Background Art
[0002] In the prior art, in order to facilitate external puncture for treatment, the electrode often adopts a tip design, and the curvature of the tip part is larger than that of other flat parts of the electrode. Since during the discharge process, the electric field energy is more concentrated at the tip, the ablation energy distribution is uneven, and a large part of the energy is concentrated at the tip, forming an elliptical discharge ablation area with the tip as the center. Taking the axial direction of the ablation needle as an example, according to the data, the axial ablation distance on the side close to the tip is much larger than that on the non-tip side, resulting in uneven ablation energy distribution, reducing the ablation efficiency, and also causing damage to normal cells. Summary of the Utility Model
[0003] The utility model provides an ablation electrode for realizing uniform energy distribution, which solves the problem of uneven energy distribution of the ablation electrode with a tip in the above background art. On the other hand, the utility model also provides an ablation stent.
[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
[0005] An ablation electrode for realizing uniform ablation energy distribution, comprising:
[0006] An electrode needle body capable of conducting electricity, an ablation section is provided on the electrode needle body, and one end of the electrode needle body is connected to an energy generator; an electrode head having a needle tip, the non-needle tip end of the electrode head is connected to the other end of the electrode needle body, and an insulating section is provided on the electrode head.
[0007] In some embodiments, the electrode needle body and the electrode head are of an integral structure, and an insulating layer is provided on the electrode head to form the insulating section.
[0008] In some embodiments, the insulating layer is a parylene coating or polyimide.
[0009] In some embodiments, the electrode head is made of an insulating material.
[0010] In some embodiments, the electrode head and the electrode needle body are separately arranged, and an insulating connection section is provided between the electrode head and the electrode needle body. One end of the insulating connection section is connected to the electrode head, and the other end of the insulating connection section is connected to the electrode needle body.
[0011] In some embodiments, the present utility model further provides an ablation stent, which includes a plurality of ablation electrodes as described in each of the above embodiments. Among them, the ablation electrodes are composed of flexible conductive wires, and the plurality of ablation electrodes are braided to form the ablation stent; an insulating sleeve is arranged outside the ablation stent, and the insulating sleeve can move relative to the ablation stent.
[0012] In some embodiments, an insulating polymer head is provided at one end of the electrode needle tip of the ablation stent to gather and insulate the electrode needle tip.
[0013] In some embodiments, an insulating coating liquid is provided at the needle tips of the plurality of ablation electrodes to form the insulating section.
[0014] Compared with the prior art, the beneficial effects brought by the present utility model are as follows:
[0015] In this application, by insulating the tip of the ablation electrode, the concentration of discharge energy at the tip is avoided. During the treatment process, the discharge sites are all electrode sites with gentle curvature, so that the ablation energy is evenly distributed. Further, the tip of the electrode needle is made of an insulating material or is insulated by an insulating coating, which not only ensures the puncture ability but also makes the energy distribution uniform.
[0016] Additional aspects and advantages of the present application will be given in part in the following description, and these will become apparent from the following description or can be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of an ablation electrode for achieving uniform energy distribution according to the present utility model;
[0018] Figure 2 is a cross-sectional view of an ablation electrode for achieving uniform energy distribution according to the present utility model;
[0019] Figure 3 is a schematic structural diagram of an ablation electrode for achieving uniform energy distribution according to the present utility model provided with an insulating connection section;
[0020] Figure 4 is a schematic structural diagram of an ablation stent according to the present utility model;
[0021] Figure 5 is a schematic diagram of an ablation stent according to the present utility model provided with an insulating polymer head. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The present application will be further described in detail below with reference to specific drawings. In the description of this embodiment, unless otherwise specified, the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the present application must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0023] In the embodiment, as Figure 1 shown, an ablation electrode for realizing uniform distribution of ablation energy provided by the present utility model mainly includes an electrode needle body 100 and an electrode needle tip 200. The electrode needle body 100 can conduct electricity, and an ablation section 101 for treatment is provided on the electrode needle body 100. One end of the electrode needle body 100 is connected to an energy generator; the electrode needle tip 200 has a needle tip, and the non-needle tip end of the electrode needle tip 200 is connected to the other end of the electrode needle body 100. Among them, an insulating section 201 is provided on the electrode needle tip 200 to prevent the ablation energy from concentrating at the needle tip, thereby causing uneven distribution of the ablation energy. In this embodiment, the ablation electrode is composed of a hard material structure and has the ability to puncture. An operator can use this ablation electrode to perform puncture treatment from outside the body or inside the body.
[0024] Further, as Figure 2 shown, the electrode needle body 100 and the electrode needle tip are of an integral structure. To form the insulating section of the electrode needle tip 200, an insulating layer 202 covering the electrode needle tip 200 is provided on the outside of the electrode needle tip 200, so that the ablation energy cannot be emitted from the needle tip and can only be emitted from the ablation section 101 of the electrode needle body 100 with a relatively gentle curvature, thereby making the ablation energy distribution uniform. Further, the insulating layer 202 is a parylene coating formed by spraying, a polyimide coating formed by heat shrinkage, or a material such as heat-shrinkable polyethylene terephthalate.
[0025] In one embodiment, the electrode needle tip 200 is made of an insulating material, which not only ensures insulation but also maintains a certain puncturing ability. For example, the insulating material is ceramic, hard plastic, or acrylic material, etc.
[0026] In one embodiment, as Figure 3 shown, the electrode needle tip 200 and the electrode needle body 100 are separately arranged, and an insulating connection section 102 is provided between the electrode needle tip 200 and the electrode needle body 100 to connect the electrode needle tip 200 and the electrode needle body 100 through the insulating connection section 102. In this embodiment, the insulating connection section 102 is made of an insulating material, such as the above-mentioned ceramic, insulating plastic, glass, acrylic, etc. In this embodiment, when the insulating connection section 102 is provided, the material of the electrode needle tip 200 is not limited, and only its puncturing ability needs to be ensured.
[0027] In one embodiment, as Figure 4 and Figure 5 shown, the present utility model further provides an ablation stent, which is mainly used for treating tumors 400 within the human body cavity 401 or near the outside of the human body cavity 401. The ablation stent 300 mainly includes ablation electrodes in each of the above embodiments. It should be particularly noted that, for the convenience of forming the ablation stent 300, the ablation electrodes are composed of flexible wires with electrical conductivity, and a plurality of ablation electrodes are woven to form the ablation stent 300 with a basket structure, as Figure 4 shown. The electrode needles 200 are located at A on one side. The electrode needles 200 are all provided with insulating layers 202, and the insulating layers 202 can be directly formed by dipping in an insulating coating solution; the insulating sleeve 301 is arranged on the outside of the ablation stent 300 to partially cover the ablation stent 300. The exposed part of the ablation stent 300 is the ablation area, and the insulating sleeve 301 can move relative to the ablation stent 300, such as radial rotation or axial telescopic translation. By providing the insulating catheter 301, when the ablation stent 300 is transported, the ablation stent 300 is located inside the insulating catheter 301, and the ablation stent 300 can be pushed to the destination through the insulating catheter 301, and then the ablation stent 300 is extended.
[0028] Furthermore, in order to achieve the aggregation of the ablation electrodes and prevent the electrode needle ends 200 of the ablation stent 300 from being dispersed, an insulating aggregation head 302 is provided at the electrode needle ends 200 of the ablation stent 300, that is, the electrode needles 200 of the ablation electrodes are embedded in the insulating aggregation head 302 to further aggregate the ablation stent 300 and keep the curvature difference of the discharge part of the ablation stent 300 from being too large, so as to achieve uniform energy distribution. The insulating aggregation head 302 is made of the aforementioned insulating material, and will not be elaborated here.
[0029] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made. These improvements and refinements should also be regarded as the protection scope of the present utility model.
Claims
1. An ablation electrode for achieving uniform distribution of ablation energy, characterized in that: include: An electrode needle body capable of conducting electricity, the electrode needle body being provided with an ablation segment, and one end of the electrode needle body being connected to an energy generator; The electrode needle head has a needle tip, the non-needle tip end of the electrode needle head is connected to the other end of the electrode needle body, and the electrode needle head is provided with an insulating section.
2. The ablation electrode for achieving uniform distribution of ablation energy according to claim 1, characterized in that: The electrode needle body and the electrode needle head are integrally constructed, and an insulating layer is provided on the electrode needle head to form the insulating section.
3. The ablation electrode for achieving uniform distribution of ablation energy according to claim 2, characterized in that: The insulating layer is a parylene coating or a polyimide.
4. The ablation electrode for achieving uniform distribution of ablation energy according to claim 1, characterized in that: The electrode needle is made of insulating material.
5. The ablation electrode for achieving uniform distribution of ablation energy according to claim 1, characterized in that: The electrode needle head and the electrode needle body are separately arranged, and an insulating connection section is arranged between the electrode needle head and the electrode needle body, one end of the insulating connection section is connected to the electrode needle head, and the other end of the insulating connection section is connected to the electrode needle body.
6. An ablation stent, characterized in that: The ablation stent comprises a plurality of ablation electrodes according to any one of claims 1 to 5, wherein the ablation electrodes are made of flexible conductive wires, and the plurality of ablation electrodes are woven to form the ablation stent; The insulating sleeve is arranged on the outer side of the ablation stent, and the insulating sleeve can move relatively with respect to the ablation stent.
7. The ablation stent according to claim 6, characterized in that: An insulating aggregation head is provided at one end of the electrode needle head of the ablation stent to gather and insulate the electrode needle head.
8. The ablation stent according to claim 6, characterized in that: The needle tips of the plurality of ablation electrodes are provided with an insulating coating liquid to form the insulating section.