An adjustable curved electrode needle for endoscopic ablation
By designing adjustable bendable electrode needles under the endoscopy, the problem of mismatch between the needle tip and the lesion position in the minimally invasive ablation treatment is solved, achieving more efficient lesion ablation and reducing damage to normal tissues.
Patent Information
- Application Number
- CN202421004959.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In minimally invasive ablation treatment, traditional ablation electrode needles do not match the position of the needle tip and the lesion due to the respiration of human organs, resulting in reduced treatment effect and damage to normal tissue.
An endoscopic adjustable bend electrode needle is designed. By providing a bend section and wire drawing at the distal end of the catheter, the angle adjustment of the electrode needle is realized to ensure the matching of the needle tip and the position of the lesion.
Lesion ablation in different directions under the same catheter is achieved, reducing the relative displacement between the needle tip and the lesion, reducing the risk of off-target, and displaying the ablation area under CT through the developing part, which facilitates the operator's real-time observation.
Smart Images
Figure CN222708380U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pulse ablation of medical devices, in particular to an adjustable curved electrode needle for ablation under an endoscope. Background Art
[0002] When a traditional ablation electrode needle is inserted into the human body for ablation during minimally invasive ablation treatment of the lungs, esophagus, etc., the organs in the human chest cavity will rise and fall due to the human body's breathing. Therefore, when the ablation needle is inserted into the lungs, liver, etc. for ablation, the lungs, liver, and other organs with lesions will move in relative position with breathing; thus, the lesioned organs need to be punctured back and forth, causing secondary damage to the lesioned organs; and during ablation, the needle tip may deviate from the predetermined position and then ablate at a non-lesioned position, which not only reduces the treatment effect and fails to completely ablate the tumor, but may also cause secondary damage to normal human tissues; therefore, improvements are necessary. Utility Model Content
[0003] In order to solve the above problems in the prior art, the utility model provides an adjustable curved electrode needle for endoscopic ablation, which can achieve angle adjustment of the electrode needle.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] An adjustable curved electrode needle for endoscopic ablation, characterized in that it comprises:
[0006] A catheter having a first channel, wherein a bending adjustment section is provided at a distal end of the catheter;
[0007] An electrode needle head, to which an electrode wire is connected, the electrode needle head is connected to the distal end of the catheter, the electrode wire is arranged in the first channel of the catheter, and one end of the electrode wire is connected to an external energy generator through the first channel;
[0008] A drawing wire is movably arranged in the first channel of the catheter, and one end of the drawing wire is fixedly connected to the end of the bending section;
[0009] The conduit comprises a first branch conduit and a second branch conduit connected to the first branch conduit, the bending section is located on the second branch conduit; the second branch conduit is provided with a plurality of first grooves in a radial direction, and the plurality of first grooves are connected to a first channel of the second branch conduit.
[0010] In some embodiments, the plurality of first grooves are arranged in two rows, and the plurality of first grooves in the two rows are symmetrically arranged about the central axis of the second branch conduit.
[0011] In some embodiments, there are two drawing wires, and the routing positions of the drawing wires correspond to the positions of the first grooves.
[0012] In some embodiments, the second branch conduit is made of plastic.
[0013] In some embodiments, two second channels for the wire drawing to pass through are provided on the inner wall of the conduit, the two second channels penetrate the first branch conduit and the second branch conduit, and the two wire drawing devices are movably arranged in the corresponding two second channels.
[0014] In some embodiments, a developing portion is formed on the electrode needle.
[0015] In some embodiments, the developing portion is an annular groove.
[0016] In some embodiments, the electrode needle includes an electrode needle body; a blade portion is formed at one end of the electrode needle body, and a mounting portion connected to the distal end of the catheter is formed at the other end of the electrode needle body.
[0017] In some embodiments, the mounting portion is two connecting blocks, and a preset distance is provided between the two connecting blocks, and the preset distance is adapted to the tube wall of the second channel formed by the protrusion.
[0018] In some embodiments, it further includes an outer sheath having a third channel, and the catheter is movably disposed in the third channel.
[0019] In some embodiments, it further includes a control handle disposed at one end of the first branch conduit, the first branch conduit is connected to the control handle, an adjustment knob is disposed on the control handle, and the wire drawing is connected to the adjustment knob.
[0020] In some embodiments, an adjusting wheel is provided at one end of the adjusting knob, a receiving groove is provided on the adjusting wheel, and one end of the drawing wire is connected to the receiving groove.
[0021] In some embodiments, the receiving groove includes a first slot and a second slot, the first slot position corresponds to one second channel position, the second slot position corresponds to another second channel position, one end of the two wires are respectively connected to the first slot and the second slot, and the winding directions of the two wires are opposite.
[0022] Compared with the prior art, the beneficial effects brought by the utility model are:
[0023] The present application can achieve ablation of lesions in different directions under the same catheter through the design of the bending section; solves the problem of reducing the relative displacement between the needle tip and the lesion during ablation; reduces the risk of off-target; combined with the developing part, it can display the energy area of the ablation needle under CT, which is convenient for the operator to observe in real time; at the same time, through the wire drawing design, the ablation direction can be adjusted without completely pulling out the electrode needle; in addition, a second channel is set in the catheter, which not only ensures the pushability, but also ensures that the wires will not be entangled. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0025] Figure 1 It is a schematic diagram of the structure of the adjustable curved electrode needle for endoscopic ablation of the utility model;
[0026] Figure 2 This is a structural exploded view of the adjustable curved electrode needle for endoscopic ablation of the utility model;
[0027] Figure 3 This is a structural exploded view of the electrode needle and the second branch catheter of the utility model;
[0028] Figure 4 It is a schematic diagram of the overall structure of the adjustable curved electrode needle for endoscopic ablation of the utility model;
[0029] Figure 5 It is a cross-sectional view of the control handle of the adjustable curved electrode needle for endoscopic ablation of the utility model;
[0030] Figure 6 It is a schematic diagram of the winding direction of two drawing wires of the adjustable curved electrode needle for endoscopic ablation of the utility model;
[0031] Figure 7 This is a cross-sectional view of a catheter of the endoscopic ablation adjustable curved electrode needle of the utility model. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0033] An embodiment of the present application provides an adjustable curved electrode needle for endoscopic ablation, such as Figure 1-Figure 2 As shown, it includes: a catheter 1 having a first channel 14, and a bending section is provided at the distal end of the catheter 1. It should be noted that the distal end is the end of the channel away from the operating end of the endoscope, and the proximal end is the end close to the control end of the endoscope. The adjustable electrode is transported to the lesion through the operating channel of the endoscope, which will not be repeated.
[0034] The electrode needle 2 is connected to the distal end of the catheter 1. The electrode needle 2 is made of a metal conductive material, such as stainless steel or an alloy. In the present embodiment, the electrode needle is connected to an electrode wire, which is disposed in the first channel 14 of the catheter 1 and can move axially relative to the catheter. One end of the electrode wire is connected to an external energy generator to transmit ablation energy. It should be noted that the bending electrode needle is a single-electrode structure, and when in use, it cooperates with a back electrode plate attached to the human body for ablation.
[0035] The drawing wire 4 is movably arranged in the catheter 1, and the distal end of the drawing wire 4 is fixedly connected to the end of the bending section; as an example, the drawing wire 4 is a steel wire; when the drawing wire 4 is pulled toward the proximal end, the drawing wire 4 drives the bending section to bend toward the side of the pulled drawing wire 4, thereby realizing the angle adjustment of the electrode needle 2.
[0036] In one embodiment, if Figure 7 As shown, in order to prevent the electrode wire 3 and the drawing wire 4 from getting entangled during operation, a second channel 12 for the drawing wire 4 to pass through is provided on the inner wall of the catheter 1, and the number of the second channels 12 is the same as the number of the drawing wire 4. In this way, the electrode wire 3 and the drawing wire 4 can move within their respective ranges of movement without causing interference.
[0037] In one embodiment, there are two wires 4 and two second channels 12, and the two second channels 12 are symmetrically arranged with respect to the central axis of the conduit 1, so that the bending section can be adjusted in multiple directions without rotating the conduit 1. In this embodiment, the wire 4 is arranged close to the inner wall of the conduit 1, and the first channel 14 is a cylindrical structure. As the best implementation method, in order to better control the bending adjustment of the second branch conduit 13, the maximum distance between the two wires 4 is equal to the inner diameter of the first channel 14 of the second branch conduit 13.
[0038] In one embodiment, if Figure 1-Figure 3As shown, the conduit 1 includes a first branch conduit 11 and a second branch conduit 13 connected to the first branch conduit 11. It should be noted that the second channel 12 runs through the first branch conduit 11 and the second branch conduit 13; the bending section is located on the second branch conduit 13; the second branch conduit 13 is made of plastic material, which is an insulating material, and is injection molded, which is convenient for processing; a plurality of first grooves 131 are provided on the second branch conduit 13 along the radial direction, so that the second branch conduit 13 forms a serpentine structure, and the first grooves 131 serve as extensions or buffers during angle adjustment; the first grooves 131 are connected to the first channel 14 of the second branch conduit 13, and the first grooves 131 also cut the second channel 12, so that the second branch conduit The second channel 12 on 13 is segmented; as an example, a plurality of first grooves 131 are designed in two rows, and the plurality of first grooves 131 in the two rows are symmetrically arranged with respect to the center of the second branch conduit 13, and the plurality of first grooves 131 in one row are controlled by a wire drawing 4, and the plurality of first grooves 131 in the other row are controlled by another wire drawing 4, that is, the distal ends of the two wire drawing 4 are respectively fixed to the distal ends of the corresponding second channel 12, and the first groove 131 can see the corresponding wire drawing 4; when one wire drawing 4 moves toward the proximal end, the other wire drawing 4 moves toward the distal end, so that the plurality of first grooves 131 in the two rows cooperate with each other as extension or buffer during pulling; that is, the bending direction of the bending section is the direction of the wire drawing 4 when it is active. Optionally, the first groove 131 may not pass through the tube wall of the second branch conduit 13, and the shape of the first groove 131 is not limited by the present invention.
[0039] In one embodiment, the drawing wire 4 is located in the middle of the plurality of first grooves 131 in the row, so that the bending effect can be optimized.
[0040] In one embodiment, if Figure 2 As shown, a developing portion 21 is formed on the electrode needle 2, and the developing portion 21 is an annular groove. Since metal is highlighted under CT, the structural shape of the metal part can be seen, and the annular groove is developed under the endoscope, so that the current position of the electrode needle 2 is convenient to know. Optionally, the developing portion 21 can also be an annular protrusion structure.
[0041] In one embodiment, if Figure 3As shown, the electrode needle 2 includes an electrode needle body 22, and the developing part 21 is connected to the electrode needle body 22; one end of the electrode needle body 22 forms a blade 23, and the blade 23 is mainly used for puncturing ablation tissue so that the electrode needle enters the tissue, and the other end of the electrode needle body 22 forms a mounting part 24 connected to the distal end of the catheter 1. In this embodiment, the mounting part 24 is connected to the distal end of the second branch catheter 13; as an example, the mounting part 24 is two connecting blocks arranged at intervals to form a preset spacing, and the two connecting blocks are adapted to the two second channels 12. When the electrode needle 2 is connected to the second branch catheter 13, the tube wall of the protruding second channel 12 is clamped to the preset spacing, so that the electrode needle 2 and the catheter 1 are more convenient to install.
[0042] In one embodiment, the adjustable bend electrode needle also includes an outer sheath 5, which has a third channel. The catheter 2 is movably arranged in the third channel of the outer sheath 5, so that the electrode needle head 2 is stored in the outer sheath 5 before reaching the destination, thereby preventing the electrode needle head 2 from causing damage to normal tissue.
[0043] In one embodiment, the adjustable bend electrode needle also includes a control handle 6, one end of the first branch catheter 11 is fixedly connected to the control handle 6, an adjustment knob 61 is provided on the control handle 6, two drawing wires 4 are connected to the adjustment knob 61, and by rotating the adjustment knob 61, the drawing wires 4 are driven to contract or release, so that the drawing wires 4 are moved relative to the catheter 1, thereby realizing the bending portion of the second branch catheter 13 to be bent at a certain angle.
[0044] In one embodiment, Figure 4 and Figure 5 As shown, an adjusting wheel 62 is provided at one end of the adjusting knob 61, and a receiving groove is provided on the adjusting wheel 62, wherein one end of two drawing wires 4 are fixed in the receiving groove, and when the adjusting knob 61 is rotated, the adjusting wheel 62 is driven to rotate, so that the drawing wires 4 are received or released along the receiving groove. Furthermore, the receiving groove includes a first notch 621 and a second notch 622, wherein the first notch 621 corresponds to the position of one of the second channels 12, and the second notch 622 corresponds to the position of the other second channel 12, that is, the two drawing wires 4 do not need to be staggered, and are directly wound into the corresponding first notch 621 and the second notch 622 from the corresponding second channel 12. As the best implementation, the two drawing wires 4 are relatively close to a parallel structure. It should be particularly noted that, as Figure 6 As shown, the winding directions of the two wires 4 are opposite. The winding direction of the wire 4 received in the first slot 621 is opposite to the winding direction of the wire 4 received in the second slot 622. When the wire in the first slot 621 is wound clockwise, the wire 4 in the second slot 622 is wound counterclockwise, and vice versa, thereby satisfying the bending of the bending section of the catheter 1.
[0045] As mentioned above, the advantages of this application are: 1. Through the design of the bending section, ablation of lesions in different directions can be achieved under the same catheter; the problem of reducing the relative displacement between the needle tip and the lesion during ablation is solved; and the risk of off-target is reduced. 2. The developing part can display the energy area of the ablation needle under CT. 3. Through the wire drawing design, the ablation direction can be adjusted without completely pulling out the electrode needle. 4. A second channel is set in the catheter, which not only ensures the pushability, but also ensures that the wires will not be entangled.
[0046] The above is only a preferred embodiment of the present invention. It should be noted that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.
Claims
1. An adjustable curved electrode needle for endoscopic ablation, characterized in that: It includes: A catheter having a first channel, wherein a bending adjustment section is provided at a distal end of the catheter; An electrode needle head, to which an electrode wire is connected, the electrode needle head is connected to the distal end of the catheter, the electrode wire is arranged in the first channel of the catheter, and one end of the electrode wire is connected to an external energy generator through the first channel; A drawing wire is movably arranged in the first channel of the catheter, and one end of the drawing wire is fixedly connected to the end of the bending section; The conduit comprises a first branch conduit and a second branch conduit connected to the first branch conduit, the bending section is located on the second branch conduit; the second branch conduit is provided with a plurality of first grooves in a radial direction, and the plurality of first grooves are connected to a first channel of the second branch conduit.
2. The endoscopic ablation adjustable curved electrode needle according to claim 1, characterized in that: The plurality of the first grooves are arranged in two rows, and the plurality of the first grooves in the two rows are symmetrically arranged about the central axis of the second branch conduit.
3. The endoscopic ablation adjustable curved electrode needle according to claim 2, characterized in that: There are two drawing wires, and the routing positions of the drawing wires correspond to the positions of the first grooves.
4. The endoscopic ablation adjustable curved electrode needle according to claim 1, characterized in that: The second branch conduit is made of plastic material.
5. The endoscopic ablation adjustable curved electrode needle according to claim 3, characterized in that: Two second channels for the wire drawing to pass through are arranged on the inner wall of the conduit, the two second channels penetrate the first branch conduit and the second branch conduit, and the two wire drawing wires are movably arranged in the corresponding two second channels.
6. The endoscopic ablation adjustable curved electrode needle according to claim 1, characterized in that: A developing portion is formed on the electrode needle.
7. The endoscopic ablation adjustable curved electrode needle according to claim 6, characterized in that: The developing portion is an annular groove.
8. The endoscopic ablation adjustable curved electrode needle according to claim 5, characterized in that: The electrode needle head comprises an electrode needle head body; a blade portion is formed at one end of the electrode needle head body, and a mounting portion connected to the distal end of the catheter is formed at the other end of the electrode needle head body.
9. The endoscopic ablation adjustable curved electrode needle according to claim 8, characterized in that: The mounting portion is two connecting blocks, and a preset distance is provided between the two connecting blocks. The preset distance is adapted to the tube wall of the second channel formed by the protrusion.
10. The endoscopic ablation adjustable curved electrode needle according to claim 1, characterized in that: It also includes an outer sheath tube having a third channel, and the catheter is movably arranged in the third channel.
11. The endoscopic ablation adjustable curved electrode needle according to claim 5, characterized in that: It also includes a control handle arranged at one end of the first branch conduit, the first branch conduit is connected to the control handle, an adjustment knob is arranged on the control handle, and the wire drawing is connected to the adjustment knob.
12. The endoscopic ablation adjustable curved electrode needle according to claim 11, characterized in that: An adjusting wheel is provided at one end of the adjusting knob, a receiving groove is provided on the adjusting wheel, and one end of the drawing wire is connected to the receiving groove.
13. The endoscopic ablation adjustable curved electrode needle according to claim 12, characterized in that: The receiving groove includes a first slot and a second slot, the first slot position corresponds to one of the second channel positions, the second slot position corresponds to another of the second channel positions, one end of the two wire draws are respectively connected to the first slot and the second slot, and the winding directions of the two wire draws are opposite.