Ablation device for realizing directional release of ablation energy

Abstract

The utility model belongs to the technical field of energy ablation of medical instruments, and provides an ablation device capable of realizing directional release of ablation energy, which comprises a first catheter, a second catheter, a third catheter and a fourth catheter, the ablation electrode is arranged at the far end of the first catheter and can be configured with ablation energy, the first catheter wraps the ablation electrode in an insulating mode, an ablation window is formed in the first catheter, and part of the ablation electrode can be exposed through the ablation window; the puncture needle head is arranged at one end of the ablation electrode and is provided with a needle tip; the side outlet needle is movably arranged in the first channel of the first catheter in a penetrating mode, one end of the side outlet needle can penetrate out of the first catheter to form a developing protrusion, and the protruding direction of the developing protrusion is consistent with the orientation of the ablation window. The ablation window is arranged on the first catheter, directional release of energy is achieved, meanwhile, side needle withdrawing is combined, an operator can conveniently confirm the orientation of the ablation window in real time under CT, operation is easy, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device energy ablation, and particularly relates to an ablation device for realizing directional release of ablation energy. Background Art

[0002] In recent years, with the continuous development of bioelectrics, irreversible electroporation technology has attracted wide attention due to its fast, non-thermal, and minimally invasive biomedical effects. By applying an external electric field, the cell membrane is penetrated and cancer cells undergo apoptosis. Since tumors are irregularly distributed in the human body, when the existing ordinary instruments are used for ablation treatment, the ablation energy is not directed at the tumor tissue. Taking a basket ablation electrode as an example, it releases energy for ablation in a 360-degree range around the ablation electrode itself. When the tumor tissue is non-circularly distributed, since the ablation energy is electric field penetration, only the voltage threshold borne by the cells is selected, and healthy or diseased tissues cannot be selectively ablated. During ablation, on the one hand, normal cell tissues will be damaged, and on the other hand, ablation energy will be wasted, and the ablation energy cannot be concentrated, reducing the ablation efficiency. Therefore, it is necessary for those skilled in the art to improve the above ablation device. Summary of the Utility Model

[0003] This application provides an ablation device for realizing directional release of ablation energy, which solves the problems in the above background that when the tumor tissue is non-circularly distributed, the traditional ablation electrode cannot selectively release ablation energy, affecting healthy tissues, and the ablation energy cannot be concentratedly released, resulting in waste of ablation energy.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An ablation device for realizing directional release of ablation energy, comprising:

[0006] A first catheter having a distal end and a proximal end, the first catheter being provided with a first channel penetrating through its distal end and proximal end, and the first catheter being an insulating tube;

[0007] An ablation electrode disposed at the distal end of the first catheter and capable of being configured with ablation energy, the first catheter insulatingly coating the ablation electrode, wherein an ablation window is provided on the first catheter, and a part of the ablation electrode can be exposed through the ablation window;

[0008] A puncture needle disposed at one end of the ablation electrode, the puncture needle being provided with a needle tip;

[0009] A side needle movably penetrating through the first channel of the first catheter, one end of the side needle being able to penetrate out of the first catheter to form a developing protrusion, wherein the protruding direction of the developing protrusion is the same as the orientation of the ablation window.

[0010] In some embodiments, the ablation window is provided with imaging members on both sides in the axial length direction of the first catheter. The imaging members include a first imaging ring and a second imaging ring. The first imaging ring is disposed along one edge of the ablation window, and the second imaging ring is disposed along the other edge of the ablation window.

[0011] In some embodiments, the puncture needle is of an insulating structure.

[0012] In some embodiments, the puncture needle and the ablation electrode are integrally constructed, and an insulating layer is provided on the puncture needle to insulate the puncture needle.

[0013] In some embodiments, the puncture needle and the ablation electrode are separately provided, and the puncture needle is made of an insulating material.

[0014] In some embodiments, the puncture needle and the ablation electrode are separately provided, and an insulating connection block is provided between the puncture needle and the ablation electrode.

[0015] In some embodiments, a first through hole is provided on the first catheter, the ablation electrode or the puncture needle. The first through hole communicates with the first channel, and one end of the side-out needle can pass through the first through hole and extend out of the first catheter.

[0016] In some embodiments, a first guiding surface is provided between the first through hole and the first channel, and the first guiding surface is inclined toward the tip of the puncture needle.

[0017] In some embodiments, an outer sheath tube sleeved outside the first catheter is further included. The outer sheath tube is provided with a through second channel, and the outer sheath tube can move axially relative to the first catheter.

[0018] In some embodiments, a handle is further included. The handle includes a first translation member, a central rod, and a second translation member. The first translation member is movably inserted through one end of the central rod, and the second translation member is movably inserted through the second end of the central rod. One end of the outer sheath tube is connected to the first translation member, and the proximal end of the first catheter is connected to one end of the central rod. The central rod is provided with a third channel, and one end of the side-out needle is connected to the second translation member through the third channel. Both the first translation member and the second translation member can reciprocate along the axial direction of the central rod.

[0019] In some embodiments, the first translation member is provided with a first cavity adapted to one end of the central rod, and the second translation member is provided with a second cavity adapted to the other end of the central rod.

[0020] In some embodiments, a first locking structure is provided between the first translation member and the center rod, and the first locking structure includes a first threaded hole provided on the first translation member, and a first threaded column is provided on the first threaded hole, and one end of the first threaded column can abut against or disengage from the center rod.

[0021] In some embodiments, a second locking structure is provided between the second translation member and the center rod, and the second locking structure includes a second threaded hole provided on the second translation member, and a second threaded column is provided on the second threaded hole, and one end of the second threaded column can abut or detach from the center rod.

[0022] In some embodiments, a first internal thread is provided in the third channel, a matching first external thread is provided on the second translation member, a first rotatably connected push block is provided on the second translation member, one end of the side needle is connected to the first push block, and a first limit member structure is provided between the first push block and the center rod to enable the first push block to move back and forth in a straight line along the third channel.

[0023] In some embodiments, the first limiting structure includes a first limiting boss arranged on the first push block and a first limiting groove arranged on the center rod, or a first limiting groove arranged on the first push block and a first limiting boss arranged on the center rod, the first limiting groove or the first limiting boss is arranged parallel to the axis relative to the center rod, and the first limiting boss is adapted to the first limiting groove.

[0024] In some embodiments, it also includes a first wire, the second translation member is provided with a second through hole, one end of the first wire is connected to the ablation electrode, and the other end of the first wire is connected to an external energy generator through the first channel, the third channel and the second through hole.

[0025] Compared with the prior art, the beneficial effects brought by the utility model are:

[0026] The present application sets an ablation electrode at one end of an insulating first catheter, and the insulating catheter insulates and covers the ablation electrode, wherein an ablation window is opened on the first catheter, and part of the ablation electrode can be exposed through the ablation window, thereby realizing the selective release of ablation energy from the ablation window in the direction. At the same time, in combination with a side-exit needle, one end of the side-exit needle extends out of the outside of the first catheter to form a development protrusion, and the direction of the development protrusion is consistent with the direction of the ablation window, so that the operator can observe the direction of the ablation window in real time under CT images, and realize precise ablation. In addition, when the side-exit needle extends to form a development protrusion, the side-exit needle can also be inserted into the tissue for anchoring to prevent the entire ablation device from moving back and forth.

[0027] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be understood through the practice of the present application. Brief Description of the Drawings

[0028] Figure 1 Schematic diagram of the overall assembly structure of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0029] Figure 2 is Figure 1 Enlarged view at A in

[0030] Figure 3 Axial sectional view of the ablation electrode of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0031] Figure 4 Schematic diagram of the side needle piercing out from the ablation electrode of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0032] Figure 5 Schematic diagram of the side needle piercing out from the puncture needle tip of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0033] Figure 6 Schematic diagram of the puncture needle tip of an ablation device for realizing directional release of ablation energy according to the present utility model being received in the outer sheath tube;

[0034] Figure 7 Stereogram of the first translation member of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0035] Figure 8 Stereogram of the central rod of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0036] Figure 9 Stereogram of the second translation member of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0037] Figure 10 Cross-sectional view of another embodiment of the central rod of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0038] Figure 11 Cross-sectional view of another embodiment of the second translation member of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0039] Figure 12 Cross-sectional view of the section at the ablation electrode of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0040] Figure 13 Axial structural sectional view at the ablation electrode of an ablation device for realizing directional release of ablation energy according to the present utility model;

[0041] Figure 14 is Figure 13 Another state structural sectional view of needle exit from the middle side. Specific implementation manners

[0042] The following further elaborates on the present application in conjunction with 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 thus should not be construed as a limitation to the present application.

[0043] As Figure 1 and Figure 2 shown, an ablation device for realizing directional release of ablation energy provided by the present utility model mainly includes a first catheter 200, an ablation electrode 203, a puncture needle 204, and a side needle 205. Specifically as follows:

[0044] The first catheter 200 has a distal end and a proximal end. As Figure 1 shown in the direction, the left side of the first catheter 200 is the distal end, and its right side is the proximal end. Among them, a first channel 206 is provided in the first catheter 200, and the first channel 206 penetrates through the distal end and the proximal end of the first catheter 200. It should be particularly noted that in this embodiment, the first catheter 200 is an insulating catheter, and the first catheter 200 can be a multi-layer structure with an embedded metal braided wire and an outer insulating layer. Optionally, the first catheter 200 can directly be an insulating tube made of insulating material, such as materials like HDPE and PTFE.

[0045] The ablation electrode 203 is arranged at the distal end of the first catheter 200. The ablation electrode 203 can be configured with ablation energy from an external energy generator. The first catheter 200 insulates and coats the ablation electrode 203, that is, the entire ablation electrode 203 is within the first channel 206 of the first catheter 200. Among them, an ablation window 201 is provided at the position corresponding to the ablation electrode 203 on the first catheter 200, so that a part of the ablation electrode 203 can be exposed through the ablation window 201 to realize the directional release of ablation energy through the ablation window 201, thereby achieving the purpose of precise ablation. In this embodiment, the outer shape structure of the ablation electrode 201 is the same as that of the first channel 206, both being cylindrical. Optionally, the ablation electrode 203 can be prismatic or ellipsoidal, and the structure of the ablation electrode 203 is not limited by the present utility model.

[0046] Furthermore, since it is necessary to enter the interior of the tissue for ablation, a puncture needle 204 is provided at one end of the ablation electrode 203, and a tip for puncture is provided on the puncture needle 204. In this embodiment, by providing the puncture needle 204, the ablation electrode 203 can enter the interior of the lesion tissue through puncture guidance.

[0047] Furthermore, since the ablation window 201 is provided, in order to facilitate the operator to understand the orientation of the ablation window 201, a side needle 205 is provided in the first channel 206 of the first catheter 200. The side needle 205 is movably inserted into the first channel 206 and can reciprocate axially relative to the first channel 206. One end of the side needle 206 can penetrate outside the first catheter 200 to form a developing protrusion 2051 relative to the first catheter 200. When the ablation electrode 203 is not delivered to the target position, the side needle 205 is received in the first channel 206. When the ablation electrode 203 is delivered to the target position, the side needle 205 can extend outside the first catheter 200 to form a developing protrusion 2051. Among them, it should be particularly noted that the protruding direction of the developing protrusion 2051 is consistent with the orientation of the ablation window 201. Thus, combined with CT, the operator can see the orientation of the developing protrusion 2051, and can quickly confirm the orientation of the ablation window 201, so that the operator can adjust the orientation of the ablation window 201 toward the lesion tissue side, thereby achieving precise ablation. In this embodiment, the ablation window 201 is rectangular. Optionally, the ablation window 201 can be oval, or a structure composed of an array of multiple small round holes, or other polygonal structures. It can be understood that the shape of the ablation window 201 is not limited by the present utility model.

[0048] In this application, by providing the ablation window 201 on the first catheter 200, a part of the ablation electrode 203 is exposed to achieve directional ablation. At the same time, the developing protrusion 2051 of the side needle 205 and the ablation window 201 are set in the same direction, which can enable the operator to understand the orientation of the ablation window 201 at any time, avoid the ablation window 201 facing the non-lesion tissue direction, thereby achieving the purpose of precise ablation, and making the ablation energy only radiate from the ablation window 201 to avoid waste of ablation energy.

[0049] In one embodiment, since the puncture needle 204 is connected to the ablation electrode 203, in order to avoid the release of ablation energy from the puncture needle 204, the puncture needle 204 is insulated. Specifically, in this embodiment, the puncture needle 204 and the ablation electrode 203 are made of an integral metal material structure, which is convenient for processing and manufacturing. An insulating layer 2041 is provided on the puncture needle 204, as Figure 3 shown, to insulate the puncture needle 204. The insulating layer 2041 is an insulating material such as parylene coating or polyimide.

[0050] Further, the puncture needle 204 and the ablation electrode 203 are arranged in a split structure. The puncture needle 204 is made of a rigid insulating material. For example, the puncture needle 204 is made of ceramic, or made of rigid plastics such as PVC or PET.

[0051] Further, the puncture needle 204 and the ablation electrode 203 are arranged in a split structure, and an insulating connection block is arranged between the puncture needle 204 and the ablation electrode 203. At this time, it can effectively avoid the electrical connection between the ablation electrode 203 and the puncture needle 204, and the material of the puncture needle 204 is not limited, and it can be a metal or non-metal material. The material of the insulating connection block is the same as the aforementioned insulating material.

[0052] In one embodiment, as Figure 12 shown, the first angle 2011 swept by the ablation window 201 in its own radial direction is not greater than 270°. Optionally, the first angle 2011 can be 180°, or 90°, or 50°, etc., and the specific size is preset according to the size of the lesion tissue.

[0053] In one embodiment, a first through hole 202 is provided on the first catheter 200, the ablation electrode 203 or the puncture needle 204. The first through hole 202 communicates with the first channel 206, and one end of the side needle 205 can pass through the first through hole 202 and penetrate out of the outside of the first catheter 200, forming a developing protrusion 2051 relative to the first catheter 200. Specifically, in this embodiment, the first through hole 202 is provided on the first catheter 200, and it is a U-shaped groove structure. The position of the first through hole 202 is close to the ablation window 201, and the orientation of the first through hole 202 is consistent with the orientation of the ablation window 201. Optionally, as Figure 4 and Figure 5 shown, the first through hole 202 can also be provided on the ablation electrode 203, or the first through hole 202 can be provided on the puncture needle 204. It can be understood that the position and shape of the first through hole 202 are not limited by the present invention, and only the orientation of the first through hole 202 needs to be consistent with the orientation of the ablation window 201.

[0054] Further, referring to Figure 13 and Figure 14, a first guiding surface 2052 is further provided between the first through hole 202 and the first channel 206. The first guiding surface 2052 is inclined towards the tip side of the puncture needle 204. In this embodiment, the first guiding surface 2052 is composed of a frustum of a cylinder. One end of the frustum of the cylinder extends out of the first catheter 200 to form the puncture needle 204, and the other end of the frustum of the cylinder extends to the first through hole 202 to form the first guiding surface 2052. The first guiding surface 2052 is mainly used to guide the side needle 205 to extend out of the first through hole 202 from the first channel 206, reducing the resistance of the side needle 205 during movement. In this embodiment, the first guiding surface 2052 is a planar structure. Optionally, the first guiding surface 2052 can be an arc surface structure, or a combined structure of an arc surface and a plane.

[0055] In one embodiment, the ablation device further includes an outer sheath 100. The outer sheath 100 is provided with a second channel 101 that penetrates through both ends of itself. The outer sheath 100 is sleeved outside the first catheter 200 through the second channel 101, and the outer sheath 100 can move relative to the first catheter 200 along its own axial direction. Specifically, the outer sheath 100 is made of a PTFE material such as PET or PVC. Since one end of the ablation electrode 203 is provided with the puncture needle 204, during the transportation process, to avoid damage to the tissues in the human body cavity by the puncture needle 204, by moving the outer sheath 100, as Figure 6 shown, the puncture needle 204 is received in the second channel 101 of the outer sheath 100. When the ablation electrode 203 is transported to the target position, relative movement occurs between the outer sheath 100 and the first catheter 200, exposing the puncture needle 204 and the ablation window 201 for puncture and ablation. In this implementation, the exposure length of the ablation window 201 in the axial direction of the first catheter 200 can also be controlled by controlling the position of the outer sheath 100 relative to the first catheter 200, so as to realize the selection of the length of the ablation window 201 to cope with different sizes of lesion tissues.

[0056] In one embodiment, as Figures 7-9As shown, the ablation device further includes a handle 300. The handle 300 includes a first translation member 301, a central rod 302, and a second translation member 303. The first translation member 301 is movably inserted through one end of the central rod 302, and the second translation member 303 is movably inserted through the second end of the central rod 302. One end of the outer sheath tube 100 is connected to the first translation member 301, and the proximal end of the first catheter 200 is connected to one end of the central rod 302. The central rod 302 is provided with a third channel 3025. One end of the side needle 205 is connected to the second translation member 302 through the third channel 3025. Both the first translation member 301 and the second translation member 303 can reciprocate along the axial direction of the central rod 302. In this embodiment, by moving the first translation member 301, the relative movement between the outer sheath tube 100 and the first catheter 200 is realized, so as to realize the accommodation of the puncture needle 204 and the leakage of the ablation window 201; by moving the second translation member 303, the side needle 205 is accommodated in the first channel and penetrates outside the first catheter 200.

[0057] Further, as Figure 7 shown, the first translation member 301 is provided with a first cavity 3011, and the first cavity 3011 is adapted to one end of the central rod 302. As Figure 9 shown, the second translation member 303 is provided with a second cavity 3031, and the second cavity 3031 is adapted to the other end of the central rod 302. In this embodiment, the outer shapes of the first cavity 3011, the second cavity 3031, and the central rod 302 are all adapted cylindrical shapes. To enable the first translation member 301 to reciprocate linearly axially relative to the central rod 302, a first limiting protrusion 3012 is provided on the inner wall of the first cavity 3011, and a first limiting groove 3021 is correspondingly provided on the central rod 302, wherein both the first limiting groove 3021 and the first limiting protrusion 3012 are arranged parallel to the axial direction of the central rod 302.

[0058] Similarly, a second limiting protrusion 3032 is provided on the inner wall of the second cavity 3031, and a second limiting groove 3022 is provided at the corresponding position of the central rod 302, and no more details will be described here. Optionally, the positions of the first limiting protrusion 3012 and the first limiting groove 3021 can be interchanged, and the positions of the second limiting protrusion 3032 and the second limiting groove 3022 can be interchanged, and the first translation member 301 and the second translation member 303 can also reciprocate linearly axially relative to the central rod 302. Further, to prevent the first translation member 301 and the second translation member 303 from moving excessively relative to the central rod 302, a limiting block 3023 is provided on the central rod 302.

[0059] Optionally, the first channel 3011 and the second channel 3031 can also be set to an irregular shape, and the central rod 302 is correspondingly adapted thereto. For example, the first channel 3011 and the second channel 3031 can be prismatic, or the cross-sections of the first channel 3011 and the second channel 3031 are elliptical, etc., all of which can limit the rotation of the first translation member 301 and the second translation member 303 relative to the central rod 302 and only perform axial linear movement.

[0060] In one embodiment, to maintain the relative position between one end of the outer sheath 100 and the first catheter 200, a first locking structure is provided between the first translation member 301 and the central rod 302. The first locking structure includes a first threaded hole 3013 provided on the first translation member 301, and a first threaded post 3014 is provided on the first threaded hole 3013. By rotating the first threaded post 3014, one end of the first threaded post 3014 can abut against or disengage from the central rod 302, so as to realize the position fixation between the first catheter 200 and the outer sheath 100 or the relative movement of the outer sheath 100 relative to the first catheter 200.

[0061] In one embodiment, a second locking structure is provided between the second translation member 303 and the central rod. The second locking structure includes a second threaded hole 3033 provided on the second translation member 303, and a second threaded post 3034 is provided on the second threaded hole 3033. By rotating the second threaded post 3034, one end of the second threaded post 3034 can abut against or disengage from the central rod 302, so as to realize the fixation or movement of the second translation member 303, so as to drive the side puncture needle 205 to extend out of the first catheter 200 for fixation, or fix the side puncture needle 205 in the first channel 206 of the first catheter 200.

[0062] Furthermore, display scale lines 3024 are provided on the central rod 302. In this embodiment, there are two display scale lines 3024, which are respectively located at both ends of the central rod 302. The display scale lines are provided with a 0 position. In the initial position, both the first translation member 301 and the second translation member 303 are at the 0 position. Specifically, in this embodiment, the 0 positions of the two display scale lines 3024 are both located at both ends of the central rod. In the initial position, the first translation member 301 is at the outermost end of one end of the central rod 302, and the second translation member 303 is at the outermost end of the other end of the central rod 302. At this time, the puncture needle 204 is received in the 101 of the outer sheath 100, and the side puncture needle 205 is received in the first channel 206 of the first catheter 200.

[0063] Such as Figure 10 and Figure 11As shown, this is another implementation form of the second translation member 303. Specifically, a first internal thread 3027 is provided in the third channel 3025, and a matching first external thread 3036 is provided on the second translation member 303. A first push block 3038 is rotatably connected to the second translation member 303. The outer diameter of the first push block 3038 is the same as the outer diameter of the second translation member 303. One end of the side outlet needle 205 is connected to the first push block 3038. A first limiting member structure is provided between the first push block 3038 and the central rod 302 to enable the first push block 3038 to perform a reciprocating linear movement along the third channel 3025.

[0064] Further, the first limiting structure includes a first limiting boss 30381 provided on the first push block 3038 and a first limiting groove 3026 provided on the central rod 302. The first limiting groove 3026 or the first limiting boss 30381 is arranged parallel to the axis of the central rod 302, and the first limiting boss 30381 is adapted to the first limiting groove 3026. In this embodiment, two pairs of mutually adapted first limiting bosses 30381 and first limiting grooves 3026 are adopted. As another deformation mode of this embodiment, it is also possible to arrange the first limiting groove 3026 on the first push block 3038 and the first limiting boss 30381 on the inner wall of the third channel 3025 of the central rod 302.

[0065] In one embodiment, it further includes a first wire 210. As Figure 9 shown, the second translation member 303 is provided with a second through hole 3035. One end of the first wire 210 is connected to the ablation electrode 203 through the first channel 206. The first wire 210 passes through the first channel 20, the third channel 3025, and the second through hole 3035 to be connected to an external energy generator, thereby realizing the transmission of ablation energy. As another deformation mode of this embodiment, it is also possible to embed a metal braided wire in the first catheter 200, and the ablation electrode 203 is connected to an external energy generator through the embedded metal braided wire. Further, it is also possible to provide a fourth channel 3037 on the second translation member, and the first wire 210 is electrically connected to an external energy generator through the fourth channel 3037.

[0066] In one embodiment, as Figure 13 and Figure 14 shown, imaging members are provided on both sides of the ablation window 201 in the axial length direction of the first catheter 200. The imaging members include a first imaging ring 501 and a second imaging ring 502. The first imaging ring 501 is arranged along one side edge of the ablation window 201, and the second imaging ring 502 is arranged along the other side edge of the ablation window 201. Specifically, the first imaging ring 501 and the second imaging ring 502 are made of platinum-iridium rings or barium sulfate materials. Optionally, as Figure 3As shown, two annular developing grooves 2042 may also be provided on the ablation electrode 203; optionally, the first developing ring 501 and the second developing ring 502 may also be arranged at the edge of the ablation electrode 203 close to the ablation window 201, so as to confirm the effective ablation length of the ablation electrode 203 and the specific position of the ablation electrode 203 under CT.

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made. These improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An ablation device for achieving directional release of ablation energy, characterized in that: include: A first catheter has a distal end and a proximal end, the first catheter is provided with a first channel penetrating the distal end and the proximal end thereof, and the first catheter is an insulating tube; an ablation electrode, disposed at the distal end of the first catheter, capable of being configured with ablation energy, wherein the first catheter insulates and covers the ablation electrode, wherein an ablation window is provided on the first catheter, and a portion of the ablation electrode can be exposed through the ablation window; A puncture needle, arranged at one end of the ablation electrode, the puncture needle having a needle tip; A side-exit needle is movably arranged in the first channel of the first catheter, and one end of the side-exit needle can pass through the first catheter to form a developing protrusion, wherein the protruding direction of the developing protrusion is consistent with the direction of the ablation window.

2. An ablation device for achieving directional release of ablation energy according to claim 1, characterized in that: The ablation window is provided with developing parts on both sides in the axial length direction of the first catheter, and the developing parts include a first developing ring and a second developing ring. The first developing ring is arranged along one edge of the ablation window, and the second developing ring is arranged along the other edge of the ablation window.

3. The ablation device for achieving directional release of ablation energy according to claim 1, characterized in that: The puncture needle is an insulating structure.

4. The ablation device for achieving directional release of ablation energy according to claim 3, characterized in that: The puncture needle and the ablation electrode are integrally constructed, and an insulating layer is provided on the puncture needle to insulate the puncture needle.

5. The ablation device for achieving directional release of ablation energy according to claim 3, characterized in that: The puncture needle and the ablation electrode are separately arranged, and the puncture needle is made of insulating material.

6. The ablation device for achieving directional release of ablation energy according to claim 3, characterized in that: The puncture needle and the ablation electrode are arranged separately, and an insulating connection block is arranged between the puncture needle and the ablation electrode.

7. The ablation device for achieving directional release of ablation energy according to claim 1, characterized in that: The first catheter, the ablation electrode or the puncture needle is provided with a first through hole, the first through hole is communicated with the first channel, and one end of the side-exit needle can pass through the first through hole and out of the first catheter.

8. The ablation device for achieving directional release of ablation energy according to claim 7, characterized in that: A first guide surface is provided between the first through hole and the first channel, and the first guide surface is inclined toward the needle tip of the puncture needle.

9. An ablation device for achieving directional release of ablation energy according to any one of claims 1 to 8, characterized in that: It also includes an outer sheath tube sleeved on the outside of the first catheter, the outer sheath tube is provided with a second through passage, and the outer sheath tube can move along its own axial direction relative to the first catheter.

10. The ablation device for achieving directional release of ablation energy according to claim 9, characterized in that: It also includes a handle, which includes a first translation member, a center rod and a second translation member, the first translation member is movably inserted into one end of the center rod, the second translation member is movably inserted into the second end of the center rod, one end of the outer sheath is connected to the first translation member, the proximal end of the first catheter is connected to one end of the center rod, the center rod is provided with a third channel, one end of the side needle is connected to the second translation member through the third channel, and both the first translation member and the second translation member can reciprocate along the axial direction of the center rod.

11. The ablation device for achieving directional release of ablation energy according to claim 10, characterized in that: The first translation member is provided with a first cavity, and the first cavity is adapted to one end of the central rod. The second translation member is provided with a second cavity, and the second cavity is adapted to the other end of the central rod.

12. An ablation device for achieving directional release of ablation energy according to claim 11, characterized in that: A first locking structure is provided between the first translation member and the center rod. The first locking structure includes a first threaded hole provided on the first translation member. A first threaded column is provided on the first threaded hole. One end of the first threaded column can abut against or be separated from the center rod.

13. The ablation device for achieving directional release of ablation energy according to claim 11, characterized in that: A second locking structure is provided between the second translation member and the center rod. The second locking structure includes a second threaded hole provided on the second translation member. A second threaded column is provided on the second threaded hole. One end of the second threaded column can abut against or be separated from the center rod.

14. The ablation device for achieving directional release of ablation energy according to claim 10, characterized in that: The third channel is provided with a first internal thread, the second translation member is provided with a matching first external thread, the second translation member is provided with a first rotatably connected push block, one end of the side needle is connected to the first push block, and a first limiter structure is provided between the first push block and the center rod to enable the first push block to move back and forth in a straight line along the third channel.

15. The ablation device for achieving directional release of ablation energy according to claim 14, characterized in that: It also includes a first limiting structure, which includes a first limiting boss arranged on the first push block and a first limiting groove arranged on the center rod, or a first limiting groove arranged on the first push block and a first limiting boss arranged on the center rod, the first limiting groove or the first limiting boss is arranged parallel to the axis relative to the center rod, and the first limiting boss is adapted to the first limiting groove.

16. The ablation device for achieving directional release of ablation energy according to claim 14, characterized in that: It also includes a first wire, the second translation member is provided with a second through hole, one end of the first wire is connected to the ablation electrode, and the other end of the first wire is connected to an external energy generator through the first channel, the third channel and the second through hole.

Images