Lateral ablation device with puncture function

Abstract

The utility model belongs to the technical field of energy ablation of medical instruments, and provides a lateral ablation device with a puncture function, which comprises a conveying puncture tube. The ablation electrode is arranged at one end of the conveying puncture tube, and the ablation electrode has a preset length; the puncture needle head is provided with a needle tip, the puncture needle head is arranged at one end of the ablation electrode, and the puncture needle head, the ablation electrode and the conveying puncture tube are coaxially arranged; the first insulating layer wraps the ablation electrode in an insulating mode, a first window is formed in the first insulating layer, and part of the ablation electrode can be exposed out through the first window; the control handle is arranged at the other end of the conveying puncture tube, a positioning mark is arranged on the control handle, and the orientation of the positioning mark is consistent with the orientation of the first window. By arranging the first window to directionally release ablation energy and combining with the positioning identifier which is arranged on the control handle and is consistent with the first window in orientation, an operator can conveniently and quickly confirm the direction of the first window, and accurate control is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device energy ablation, in particular to a lateral ablation device with a puncture function. Background Art

[0002] In recent years, with the continuous development of bioelectrics, irreversible electroporation technology has attracted widespread attention for its fast, non-thermal, and minimally invasive biomedical effects. It penetrates the cell membrane and causes cancer cells to apoptosis by applying an external electric field. Since tumors are irregularly distributed in the human body, the ablation energy of existing common instruments is not directed to the tumor tissue during ablation treatment. For example, the basket ablation electrode releases energy 360 degrees by the ablation electrode itself. When the tumor tissue is non-circularly distributed, the ablation energy is penetrated by the electric field, and only the voltage threshold to which the cell is subjected is selected, and it cannot be selective for healthy or diseased tissues. During ablation, on the one hand, it will cause damage to normal cell tissues, and on the other hand, it will also waste ablation energy, and it is impossible to concentrate ablation energy, which reduces ablation efficiency. Therefore, as professional and technical personnel in this field, it is necessary to improve the above-mentioned ablation device. Utility Model Content

[0003] The present application provides a lateral ablation device with puncture function to solve the problems in the above background, that is, when the tumor tissue is non-circularly distributed, the traditional ablation electrode cannot release selective ablation energy, causing impact on healthy tissue, and the ablation energy cannot be released in a concentrated manner, resulting in waste of ablation energy.

[0004] In order to achieve the above purpose, the utility model adopts the following technical effects:

[0005] A lateral ablation device with puncture function, comprising:

[0006] A delivery puncture tube having a first end and a second end;

[0007] an ablation electrode, which can be configured with ablation energy, and is disposed at the first end of the delivery puncture tube, and has a preset length;

[0008] A puncture needle having a needle tip, wherein the puncture needle is arranged at one end of the ablation electrode, wherein the puncture needle, the ablation electrode and the transport puncture tube are arranged coaxially;

[0009] a first insulating layer for insulating and covering the ablation electrode, wherein the first insulating layer is provided with a first window, and a portion of the ablation electrode can be exposed to the outside through the first window;

[0010] A control handle is arranged at the second end of the transport puncture tube, and a positioning mark is arranged on the control handle, wherein the orientation of the positioning mark is consistent with the orientation of the first window.

[0011] In some embodiments, the delivery puncture tube, the ablation electrode and the puncture needle are an integrated metal needle structure, and the delivery puncture tube and the puncture needle are provided with a second insulating layer.

[0012] In some embodiments, the metal needle is provided with a second channel, and the second channel runs through both ends of the metal needle.

[0013] In some embodiments, it also includes an outer sheath tube having a through first channel, the outer sheath tube is sleeved on the transport puncture tube, the outer sheath tube and the transport puncture tube can move axially relative to each other, wherein a second window is provided at one end of the outer sheath tube close to the ablation electrode, and the first window can be completely leaked out through the second window.

[0014] In some embodiments, the first window and the second window are consistent in shape and size.

[0015] In some embodiments, a first angle swept by the first window in the radial direction of the ablation electrode is no greater than 270°.

[0016] In some embodiments, the first angle is no greater than 180°.

[0017] In some embodiments, the control handle includes a grip and a push rod, the push rod is movably inserted into the grip, the second end of the transport puncture tube is connected to the push rod, and the outer sheath is connected to the grip.

[0018] In some embodiments, the handle is provided with a first cavity, and the push rod is provided with an adaptable plug-in rod, and the plug-in rod drives the push rod to move axially and linearly along the first cavity of the handle.

[0019] In some embodiments, the positioning mark is disposed on the handle or the putter.

[0020] In some embodiments, a cable assembly is further included, wherein the cable assembly is provided with a needle core, and the needle core can be inserted into the second channel and abut against the inner wall of the transport puncture tube.

[0021] In some embodiments, a developing structure is provided on the ablation electrode, and the developing structure includes a developing ring, and the developing ring is arranged along the edge of the first window in the axial direction of the ablation electrode.

[0022] Compared with the prior art, the beneficial effects brought by the utility model are:

[0023] The present application provides a first insulating layer on the ablation electrode for insulation covering, and opens a first window on the first insulating layer, so that part of the ablation electrode can leak out through the first window to achieve accurate release of ablation energy. At the same time, combined with the positioning mark set on the control handle, the direction of the positioning mark on the control handle is kept consistent with the direction of the first window, without the aid of external tools, so that the operator can easily understand the direction of the first window.

[0024] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram summarizing the structure of a lateral ablation device with puncture function according to the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 It is a structural schematic diagram of a first window at a puncture needle of a lateral ablation device with puncture function according to the utility model;

[0028] Figure 4 It is a structural schematic diagram of a second window of a lateral ablation device with puncture function according to the utility model;

[0029] Figure 5 It is a cross-sectional view of the ablation electrode of a lateral ablation device with puncture function according to the utility model;

[0030] Figure 6 This is a cross-sectional view of the internal structure of a control handle of a lateral ablation device with puncture function according to the utility model;

[0031] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0032] Figure 8 for Figure 6 Enlarged view of center C.

[0033] Fig. 9 The utility model is a cross-sectional schematic diagram of an ablation electrode of a lateral ablation device with a puncture function. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with specific drawings. In the description of this embodiment, unless otherwise specified, the terms "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the present application must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0035] In one embodiment, Figure 1-3 As shown, a lateral ablation device with puncture function provided by the utility model includes a delivery puncture tube 100 , an ablation electrode 101 , a puncture needle 102 , a first insulating layer 1011 and a control handle 300 .

[0036] Specifically, the transport puncture tube 100 is provided with a first end and a second end. In this embodiment, the transport puncture tube 100 is a hard tube that cannot be bent and can be made of metal or hard plastic material;

[0037] The ablation electrode 101 is arranged at the first end of the delivery puncture tube 100. The ablation electrode 101 is arranged at a preset length, and the ablation energy of the external energy generator can be transmitted to the ablation electrode 101. Specifically, if the delivery puncture tube 100 is made of metal material, the ablation energy is directly transmitted to the ablation electrode 101 through the delivery puncture tube 100. If the delivery puncture tube 100 is made of hard plastic material, a wire is arranged in the delivery puncture tube 100 to connect the ablation electrode 101 with the external energy generator;

[0038] The puncture needle 102 is fixedly arranged at one end of the ablation electrode 101 and has a needle tip. In this embodiment, the needle tip is provided with a cutting edge for puncturing the lesion tissue. It should be particularly noted that the puncture needle 102, the ablation electrode 101 and the delivery puncture tube 100 are coaxially arranged to meet the surgical requirements of extracorporeal subcutaneous puncture and reduce the resistance during the puncture process.

[0039] The first insulating layer 1011 is arranged on the outside of the ablation electrode 101 to insulate the ablation electrode 101, wherein a first window 1031 is provided on the first insulating layer 1011, and part of the ablation electrode 101 can be exposed through the first window 1031, thereby achieving the release of ablation energy; in this embodiment, the shape and size of the first window 1031 are not limited and can be pre-set according to the lesion tissue. The first window 1031 can be a rectangle, a square or a structure composed of multiple small circular holes.

[0040] The control handle 300 is disposed at the second end of the puncture tube 100 , and a positioning mark 3011 is provided on the control handle 300 , wherein the orientation of the positioning mark 3011 relative to the control handle 300 is consistent with the orientation of the first window 1031 .

[0041] The present application sets a first insulating layer 1011 on the ablation electrode 101, sets a first window 1031 on the first insulating layer 1011, and partially exposes the ablation electrode 1011 through the first window 1031, thereby achieving directional release of ablation energy and releasing the ablation energy only from the first window 1031, thereby avoiding waste of ablation energy; in addition, combined with the positioning mark 3011 set on the control handle 300, by keeping the positioning mark 3011 consistent with the direction of the first window 1031, the operator can understand the direction of the first window 1031 at any time without the aid of an external device, thereby achieving precise ablation requirements.

[0042] In one embodiment, for ease of processing and manufacturing, the transport puncture tube 100, the ablation electrode 101 and the puncture needle 102 are composed of an integrally constructed metal needle. Specifically, a second insulating layer is provided on the transport puncture tube 100 and the puncture needle 102 to ensure that the ablation energy is only released from the first window 1031. The first insulating layer 1011 and the second insulating layer are made of the same material, which can be made of materials such as parylene or polyimide. Optionally, the puncture needle 102 can also be provided with no second insulating layer for insulation treatment, which can allow the ablation energy to be emitted from the puncture needle 102.

[0043] Furthermore, a second channel is provided on the integrally constructed metal needle, and the second channel runs through both ends of the metal needle. Optionally, the metal needle may be a solid structure. When it is a solid structure, the wire is connected to the metal needle by welding or bonding, thereby realizing ablation energy transfer. As another variant implementation of this embodiment, the transport puncture tube 100 and the puncture needle 102 may be arranged as an integral structure, made of a metal pipe, an insulating sleeve such as a heat shrink sleeve, a parylene coating or a polyimide is arranged on the outside thereof, a first window 1031 is opened on the metal pipe of the integrally constructed transport puncture tube 100 and the puncture needle 102, the needle core 401 is inserted into the second channel and one end of the needle core 401 is inserted into the first window 1031, and the needle core 401 is partially exposed relative to the first window 1031 to form the ablation electrode 101.

[0044] In one embodiment, Figure 4 and Figure 5As shown, the ablation device also includes an outer sheath 200, which has a first channel 202 running through both ends of the outer sheath 200. The outer sheath 200 is sleeved on the outside of the transport puncture tube 100 through the first channel 202. The outer sheath 200 can move axially relative to the transport puncture tube 100. It should be particularly pointed out that a second window 201 is provided at one end of the outer sheath 200 close to the ablation electrode 101, and the first window 1031 can be completely leaked out through the second window 201.

[0045] Furthermore, the size of the first window 1031 is consistent with that of the second window 201. Specifically, the operator first performs tissue puncture by exposing the puncture needle 102 to the first channel 202 of the outer sheath 200. When the puncture is completed, the outer sheath 200 needs to be moved to cover the puncture needle 102. Figure 5 As shown, when the puncture needle 102 is completely located in the first channel 202 of the outer sheath 200, the first window 1031 can be completely leaked through the second window 201, so that the ablation energy is released from the first window 1031 and the second window 201. In this embodiment, the preset length of the ablation electrode 101 can also be selected by the misalignment and overlap of the first window 1031 and the second window 201 to adapt to lesion tissues of different sizes. In this embodiment, the outer sheath 200 is a metal needle tube, and a heat shrink sleeve is arranged on the outside for insulation coating. Optionally, the outer sheath 200 can also be made of insulating material, such as PET, PTFE or PVC. Optionally, the second window 201 can also be larger than the area of ​​the first window 1031. In this embodiment, it is only necessary to completely leak the first window 1031.

[0046] In one embodiment, Fig. 9 As shown, the first angle 1032 swept by the first window 1031 in the radial direction of the ablation electrode 101 is not greater than 270°, and may be 220°, 150° or 100°, etc. When the lesion tissue range is large, a larger first angle 1032 is required to avoid moving the ablation electrode side position multiple times. Furthermore, as an optimal implementation, the first angle 1032 is not greater than 180°, wherein the size of the first angle 1032 can be preset according to the actual size of the lesion, such as 120°, 90° or 70°, etc.

[0047] In one embodiment, the control handle 300 includes a grip 301 and a push rod 302, and the push rod 302 is movably disposed on the grip 301. Figure 6 and Figure 8 As shown, the second end of the delivery puncture tube 100 is connected to the push rod. Figure 7As shown, the outer sheath tube 200 is fixedly connected to the handle 301. The relative movement between the push rod 302 and the handle 301 is realized to realize the relative movement between the transport puncture tube 100 and the outer sheath tube 200, so that the puncture needle 102 can be stored or extended in the first channel 202.

[0048] Furthermore, a first cavity 3012 is provided on the handle 301, and a plug rod 3021 adapted to the first cavity 3012 is provided on the push rod 302, wherein the plug rod 3021 can make the push rod 302 move back and forth linearly along the first cavity 3012 of the handle 301. Specifically, in this embodiment, the plug rod 3021 and the first cavity 3012 are non-cylindrical structures, for example, the cross-sections of the plug rod 3021 and the first cavity 3012 are prismatic or elliptical, and through such a structure, the push rod 302 can only move axially relative to the handle 301 without rotating. As another implementation method in this embodiment, the plug-in rod 3021 and the first cavity 3012 can also be set into a circular structure, but a limiting structure needs to be set on the inner wall of the plug-in rod 3021 and the first cavity 3012 of the handle 301. For example, a limiting boss is set on the plug-in rod 3021, and a matching limiting groove is set on the inner wall of the first cavity 3012. The limiting groove or the limiting boss is set parallel to the axial direction of the push rod 302. The position of the limiting boss and the limiting groove can also be interchanged, which can also enable the push rod 302 to move only along its own axial direction.

[0049] Furthermore, the plug-in rod 3021 and the first cavity 3012 can be arranged into a regular circular structure to realize the rotation between the outer sheath 200 and the transport puncture tube 100. For example, when the positions of the first window 1031 and the second window 201 coincide with each other, the first window 1031 and the second window 201 can be coincident in the radial direction by rotating the push rod 302, and the size of the first window 1031 can be adjusted in the radial direction.

[0050] In one embodiment, the positioning mark 3011 is disposed on the handle 301 or the push rod 302. In this embodiment, the positioning mark 3011 is a positioning boss disposed on the handle 301, wherein the protruding direction of the positioning boss is consistent with the orientation of the first window 1031. Optionally, the positioning mark 3011 may also be a positioning groove; optionally, the positioning mark 3011 may also be disposed on the push rod 302; optionally, the positioning mark 3011 may also be a color mark. It is understood that the shape structure and color of the positioning mark 3011 are not limited by the present invention, and it is only necessary to keep the orientation of the positioning mark 3011 consistent with that of the first window 1031.

[0051] In one embodiment, Figure 6 and Figure 8As shown, the cable assembly 400 is also included, and a needle core 401 is provided on the cable assembly 400. In this embodiment, when the second channel is provided on the integrally constructed metal needle, the needle core 401 can be inserted into the second channel and abut against the inner wall of the second channel, thereby achieving electrical connection. Further, the contact length between the needle core 401 and the second channel is optional. When the contact length between the needle core 401 and the inner wall of the second channel is sufficient, the stability of the electrical connection between the two can be ensured, thereby avoiding the situation of virtual connection and missed connection.

[0052] In one embodiment, a developing structure is provided on the ablation electrode 101, and the developing structure includes a developing ring, wherein the developing ring is arranged along the edge of the first window 1031 in the axial direction of the ablation electrode 101. In this embodiment, there are two developing rings, including a first developing ring 501 and a second developing ring 502. Figure 2 and Figure 5 As shown, they are respectively arranged along the axial direction of the ablation electrode 101, and the developing ring is located at the edge of the first window 1031. Optionally, the developing ring can also be arranged on the ablation electrode 101. Specifically, the developing ring can be made of materials such as a platinum iridium ring or barium sulfate, and an annular groove can also be engraved on the ablation electrode 101 to form a developing ring. The above structures can be developed under CT, so that the operator can check the position of the ablation electrode 101 and the ablation area.

[0053] 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. A lateral ablation device with puncture function, characterized in that: include: A delivery puncture tube having a first end and a second end; an ablation electrode, which can be configured with ablation energy, and is disposed at the first end of the delivery puncture tube, and has a preset length; A puncture needle having a needle tip, wherein the puncture needle is arranged at one end of the ablation electrode, wherein the puncture needle, the ablation electrode and the transport puncture tube are arranged coaxially; a first insulating layer for insulating and covering the ablation electrode, wherein the first insulating layer is provided with a first window, and a portion of the ablation electrode can be exposed to the outside through the first window; A control handle is arranged at the second end of the transport puncture tube, and a positioning mark is arranged on the control handle, wherein the orientation of the positioning mark is consistent with the orientation of the first window.

2. A lateral ablation device with puncture function according to claim 1, characterized in that: The transport puncture tube, the ablation electrode and the puncture needle are an integrated metal needle structure, and the transport puncture tube and the puncture needle are provided with a second insulating layer.

3. A lateral ablation device with puncture function according to claim 2, characterized in that: The metal needle is provided with a second channel, and the second channel runs through two ends of the metal needle.

4. A lateral ablation device with puncture function according to claim 1, characterized in that: It also includes an outer sheath tube with a first through-going channel, the outer sheath tube is sleeved on the transport puncture tube, the outer sheath tube and the transport puncture tube can move axially relative to each other, wherein a second window is provided at one end of the outer sheath tube close to the ablation electrode, and the first window can be completely leaked out through the second window.

5. A lateral ablation device with puncture function according to claim 4, characterized in that: The first window and the second window are consistent in shape and size.

6. A lateral ablation device with puncture function according to claim 1, characterized in that: A first angle swept by the first window in the radial direction of the ablation electrode is no greater than 270°.

7. A lateral ablation device with puncture function according to claim 6, characterized in that: The first angle is no greater than 180°.

8. The lateral ablation device with puncture function according to claim 4, characterized in that: The control handle comprises a grip and a push rod, wherein the push rod is movably inserted into the grip, the second end of the transport puncture tube is connected to the push rod, and the outer sheath is connected to the grip.

9. A lateral ablation device with puncture function according to claim 8, characterized in that: The handle is provided with a first cavity, and the push rod is provided with an adaptable plug-in rod, and the plug-in rod drives the push rod to move axially and linearly along the first cavity of the handle.

10. The lateral ablation device with puncture function according to claim 8, characterized in that: The positioning mark is arranged on the handle or the push rod.

11. A lateral ablation device with puncture function according to claim 3, characterized in that: It also includes a cable assembly, which is provided with a needle core. The needle core can be inserted into the second channel and abut against the inner wall of the transport puncture tube.

12. A lateral ablation device with puncture function according to claim 1, characterized in that: The ablation electrode is provided with a developing structure, and the developing structure comprises a developing ring, and the developing ring is arranged along the edge of the first window in the axial direction of the ablation electrode.

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