Ablation electrode and ablation equipment

Abstract

The ablation electrode comprises an electrode needle, the front end of the electrode needle is a needle tip, the needle tip is of a conical structure, the conical surface of the needle tip is sequentially divided into an inner electrode area, a first insulation area, an outer electrode area and a second insulation area in the direction from the conical tip to the conical bottom, and after the ablation electrode is powered on, ablation waves are generated between the inner electrode area and the outer electrode area; the adjusting tube is inserted into the outer surface of the electrode needle, can axially move relative to the electrode needle and is used for adjusting the length of the part, exposed out of the adjusting tube, of the electrode needle; and the electrode needle is arranged on the operating handle. According to the ablation electrode, the accuracy of the ablation range can be improved, and adjacent tissues, sclera and conjunctiva are prevented from being damaged. The depth of the electrode needle penetrating into the tissue can be adjusted through the adjusting tube, and operation is simple and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an ablation electrode and an ablation device. Background Art

[0002] Glaucoma is the world's leading irreversible cause of blindness. Intraocular pressure (IOP) is an independent risk factor for glaucoma, leading to further damage to the optic nerve, atrophy and depression of the optic disc, visual field defects and decreased vision. Controlling intraocular pressure is mainly to ensure smooth drainage of aqueous humor. Any obstruction in the aqueous humor circulation pathway can lead to pathological changes or aggravation caused by increased intraocular pressure.

[0003] In the prior art, it is disclosed that glaucoma can be treated by radiofrequency ablation, for example, by destroying the aqueous humor tissue in the ciliary body through ablation, thereby reducing the production of aqueous humor in the ciliary body, reducing intraocular pressure, and achieving the purpose of treating and improving glaucoma. In addition, the prior art also discloses some radiofrequency ablation electrodes or ablation devices that implement this technology, but the radiofrequency ablation electrodes in the prior art are not accurate enough in ablation range when ablating eye tissue, which can easily cause damage to adjacent tissues, sclera and conjunctiva. For example, CN217908152U discloses an ablation electrode and an ablation host for treating glaucoma, the ablation electrode includes a central axis electrode, an insulating sleeve arranged on the periphery of the central axis electrode, and a jacket electrode arranged on the periphery of the insulating sleeve; after the ablation electrode is energized, an ablation zone is generated between the central axis electrode and the jacket electrode. In this patent, the ablation zone generated between the central axis electrode and the jacket electrode has a large range, which can easily cause damage to adjacent tissues, sclera and conjunctiva, and cannot achieve the degree of accurate ablation.

[0004] In the prior art, the ablation electrode is used to adjust the distance between the front end of the positive electrode and the front end of the negative electrode to adjust the depth of the radiofrequency ablation electrode penetrating into the eye. The positive electrode and the negative electrode can slide relative to each other, and the adjustment structure is complex. Summary of the invention

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide an ablation electrode, wherein the ablation electrode comprises an electrode needle, the front end of the electrode needle is a needle tip, the needle tip is a conical structure, and the conical surface is divided into an inner pole region, a first insulating region, an outer pole region and a second insulating region in the direction from the cone tip to the cone bottom, and when the ablation electrode is energized, an ablation wave is generated between the inner pole region and the outer pole region; an adjustment tube is inserted into the outer surface of the electrode needle and can move axially relative to the electrode needle, so as to adjust the length of the electrode needle exposed from the adjustment tube; an operating handle, on which the electrode needle is installed.

[0006] In some embodiments, the electrode needle is cylindrical as a whole, and its cross-section includes an electrode inner pole, a first insulating layer, an electrode outer pole, and a second insulating layer from the inside to the outside in the radial direction. The outer surfaces of the front ends of the electrode inner pole, the first insulating layer, the electrode outer pole, and the second insulating layer correspondingly form the inner pole region, the first insulating region, the outer pole region, and the second insulating region.

[0007] In some embodiments, a first through hole is provided on the operating handle, and the first through hole is a step hole with a step surface, and the first through hole allows the rear end of the electrode needle to pass through and be fixed in the first through hole; the adjustment tube is inserted into the first through hole and fixedly abutted against the step surface.

[0008] In some embodiments, the adjustment tube has a plurality of models with different lengths and sizes, and different models of adjustment tubes are replaced to allow different lengths of the electrode needle exposed from the adjustment tube.

[0009] In some embodiments, the outer surface of one end of the adjusting tube is provided with a numerical mark or a scale mark, and the numerical mark or the scale mark is used to display the length of the electrode needle exposed from the adjusting tube; preferably, the outer surface of the adjusting tube away from the one end is also provided with a connection in place mark, and the connection in place mark is used to indicate that this end of the adjusting tube is used to be connected to the operating handle and to mark the connection inserted into place.

[0010] In some embodiments, the operating handle is slender as a whole, including a handle end and a handle body, the first through hole passes through the opposite front and rear sides of the handle end, and the rear side of the handle end is connected to the handle body.

[0011] In some embodiments, the handle end has a conical structure, the cross-sectional dimension of the front side of the handle end is smaller than the cross-sectional dimension of the rear side of the handle end, a first annular flange is provided near the middle portion of the handle end, abutment portion is formed between the first annular flange and the rear side of the handle end, and the cross-sectional dimension of the abutment portion gradually decreases and then gradually increases in the direction from the first annular flange to the rear side of the handle end.

[0012] In some embodiments, the handle end includes a positioning sleeve, the positioning sleeve coincides with the central axis of the handle end and the free end of the positioning sleeve further extends toward the rear side of the handle end; one of the positioning sleeve and the handle body is provided with a first positioning groove, and the other of the positioning sleeve and the handle body is provided with a positioning protrusion that cooperates with the first positioning groove.

[0013] In some embodiments, a second annular flange is provided on the front side of the handle body, and a gripping portion is provided at a position of the handle body close to the second annular flange, and the cross-sectional size of the gripping portion gradually decreases and then gradually increases in the direction from the second annular flange to the rear side of the handle body.

[0014] In some embodiments, the handle body includes a left shell and a right shell symmetrically arranged, and an upper shell arranged on the top of the left shell and the right shell and connected to the left shell and the right shell, and the middle area of ​​the top of the left shell and the right shell is respectively provided with an opening to allow the upper shell to be inserted into the installation groove formed by the two openings; preferably, a first fixing block is provided at a position close to the front end of the bottom of the upper shell, and a first fixing slot is provided on the lower side of the front end of each opening to allow the first fixing block to be inserted and fixed in the first fixing hole formed by the two first fixing slots; preferably, plug-in blocks are provided on both sides of the middle area of ​​the bottom of the upper shell, and the openings are arc-shaped openings, and a plug-in slot matching the plug-in block is provided on the lower side of the middle part of the arc-shaped opening; preferably, a PCB board connected to the electrode needle is provided inside the handle body, and a mounting protrusion is provided in the middle area of ​​the bottom of the upper shell, and the lower surface of the mounting protrusion is provided with a mounting cavity extending toward its upper surface to allow the PCB board to be accommodated and fixed in the mounting cavity.

[0015] In some embodiments, it also includes an electrode needle protection cap, which is a hollow conical structure for covering the electrode needle and fixed to the periphery of the handle end; preferably, a second through hole is provided on the electrode needle protection cap, and the second through hole connects the front and rear sides of the electrode needle protection cap opposite to each other, so as to allow the adjustment tube to pass through the second through hole; preferably, a strip through hole is provided on the electrode needle protection cap, which radially penetrates the electrode needle protection cap and extends along its axial direction, and at least two strip clamping arms are formed in the strip through hole, and the free end of each strip clamping arm extends in a direction close to the second through hole, and the strip clamping arm can clamp the adjustment tube after elastic deformation; preferably, a clamping portion is formed on the inner side of each strip clamping arm, and a groove extending along the length direction of the clamping surface is provided on the clamping surface of the clamping portion, and when the free ends of the at least two clamping arms are pressed and concentrated, a guide channel is formed on the clamping portion by the groove to guide the adjustment tube to be inserted from the second through hole and enter the first through hole.

[0016] The present invention further provides an ablation device, comprising an ablation host and the ablation electrode mentioned above, wherein the ablation host is electrically connected to the ablation electrode.

[0017] The beneficial effects of the present invention are as follows: the present invention discloses an ablation electrode, which includes an electrode needle, the front end of the electrode needle is a needle tip, the needle tip is a conical structure, and its conical surface is divided into an inner pole region, a first insulating region, an outer pole region and a second insulating region in the direction from the cone tip to the cone bottom. After the ablation electrode is energized, an ablation wave is generated between the inner pole region and the outer pole region; it also includes an adjustment tube, which is inserted into the outer surface of the electrode needle and can move axially relative to the electrode needle to adjust the length of the electrode needle exposed in the adjustment tube; it also includes an operating handle, and the electrode needle is installed on the operating handle. The ablation electrode in the present invention can improve the accuracy of the ablation range and avoid damage to adjacent tissues, sclera and conjunctiva. The depth of the electrode needle penetrating into the tissue can be adjusted by the adjustment tube, and the operation is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an overall schematic diagram of an ablation electrode according to the present invention;

[0019] Figure 2 It is a schematic diagram of the separation of the electrode needle protection cap and the operating handle in an ablation electrode according to the present invention;

[0020] Figure 3 is an exploded schematic diagram of an ablation electrode according to the present invention;

[0021] Figure 4a is an overall schematic diagram of an electrode needle in an ablation electrode according to the present invention;

[0022] Figure 4b yes Figure 4a A partial enlarged schematic diagram of the middle A area; Figure 5 is a partial cross-sectional view of an electrode needle in an ablation electrode according to the present invention;

[0023] Figure 6 is a cross-sectional view of a handle end of an ablation electrode according to the present invention;

[0024] Figure 7 is a schematic diagram of an adjustment tube in an ablation electrode according to the present invention;

[0025] Figure 8 is another schematic diagram of an adjustment tube in an ablation electrode according to the present invention;

[0026] Fig. 9 is a schematic diagram of a counterweight block in an ablation electrode according to the present invention;

[0027] Fig.10a is a side view of an electrode needle protection cap in an ablation electrode according to the present invention;

[0028] Fig.10b is an overall schematic diagram of an electrode needle protection cap in an ablation electrode according to the present invention;

[0029] Fig.11 is a cross-sectional view of an electrode needle protective cap in an ablation electrode according to the present invention;

[0030] Fig.12 is a schematic diagram of an upper shell in an ablation electrode according to the present invention;

[0031] Fig.13 is an exploded schematic diagram of an operating handle in an ablation electrode according to the present invention;

[0032] Fig.14 is a schematic diagram of a left shell of an ablation electrode according to the present invention;

[0033] Fig.15 is a schematic diagram of an ablation device according to the present invention;

[0034] Fig.16 is a schematic diagram of an embodiment of an adjustment component in an ablation electrode according to the present invention;

[0035] Fig.17 It is a schematic diagram of another embodiment of an adjustment component in an ablation electrode according to the present invention. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0038] like Figures 1 to 17 As shown, the present application provides an ablation electrode, which includes an electrode needle 1. The front end of the electrode needle 1 is a needle tip 2, and the needle tip 2 is used to penetrate the eye tissue. The needle tip 2 is cone-shaped, and its cone surface includes an inner pole area 21, a first insulating area 22, an outer pole area 23 and a second insulating area 24 in sequence from the cone tip to the cone bottom. After the ablation electrode is connected to the ablation host, an ablation wave is generated between the inner pole area 21 and the outer pole area, and the ablation wave is used to act on the ciliary body to reduce the production of aqueous humor.

[0039] The ablation electrode further comprises an adjusting component, which is connected to the electrode needle 1 and is used to adjust the depth at which the electrode needle 1 penetrates into the eye tissue.

[0040] The ablation electrode further comprises an operating handle 4 , on which the electrode needle 1 and the adjustment assembly are mounted. The adjustment assembly can move relative to the operating handle 4 , and the operating handle 4 is connected to the ablation host 100 via a connector 200 .

[0041] The conical needle tip of the electrode needle of the ablation electrode of the present application is divided into an inner pole region 21, a first insulating region 22, an outer pole region 23 and a second insulating region 24 in the direction from the cone tip to the cone bottom. After the electrode needle 1 is energized, an ablation wave is generated only between the inner pole region 21 and the outer pole region 23. The ablation range is precise, avoiding damage to adjacent tissues, sclera and conjunctiva during ablation. In the present application, the depth of the electrode needle 1 penetrating into the eye tissue can be adjusted by adjusting the component, so that the depth of the electrode needle 1 penetrating into the eye is controllable. The various embodiments of the present application will be described and illustrated in detail below.

[0042] like Figures 1 to 6 As shown, as an embodiment of the ablation electrode, the ablation electrode includes an electrode needle 1, and the adjustment component is an adjustment tube 3. The adjustment tube 3 can be inserted outside the electrode needle 1 (i.e., the outer surface) movably relative to the ablation electrode, and is installed on the operating handle 4. The length of the electrode needle 1 exposed from the adjustment tube 3 is the depth of piercing the eye tissue. In this embodiment, the adjustment tube 3 surrounds the periphery of the electrode needle 1 and can move axially relative to the electrode needle 1. The length of the electrode needle 1 exposed from the adjustment tube 3 can be adjusted. By adjusting the depth, it can adapt to the eyeballs of different patients and achieve the purpose of precise ablation.

[0043] In other specific feasible embodiments, the end of the adjusting tube 3 may also be connected to the operating handle 4 in other detachable ways. For example, the end of the adjusting tube 3 is fixed to the outer end face of the handle end 41 of the operating handle 4 by magnetic attraction. In some other ways, the adjusting tube 3 is not installed in the operating handle 4, and it fits tightly with the insertion of the electrode needle 1, and the adjusting tube 3 may also abut against the outer end face of the handle end 41 of the operating handle 4.

[0044] The adjustment tube 3 of the present application has models with a variety of different lengths and sizes. The adjustment tubes 3 of different models are replaced to allow the electrode needle 1 to be exposed to different lengths in the adjustment tube 3; the operator can determine the depth of the electrode needle 1 inserted into the eyeball according to the patient's eyeball structure and the required ablation depth, and then achieve this purpose by replacing the adjustment tubes 3 of different models. The method of replacing the adjustment tube 3 is simple, fast, and low-cost. In the present application, the length of the electrode needle 1 exposed in the adjustment tube 3 can be adjusted and controlled by the adjustment tube 3 (this length is the depth that the electrode needle 1 can penetrate into the eye, the diameter of the adjustment tube 3 is greater than the diameter of the electrode needle 1, and a protruding step is formed between the electrode needle 1 and the adjustment tube 3. After the tip of the electrode needle 1 penetrates into the eye, the adjustment tube 3 will be blocked on the surface of the eye and will not enter the eye), so that the depth of the ablation electrode penetrating into the eye can be controlled.

[0045] Specifically, in this embodiment, the operating handle 4 is provided with a first through hole 43, which is a stepped hole with a stepped surface. The first through hole 43 allows the rear end of the electrode needle 1 to pass through and be fixed in the first through hole 43; the adjustment tube 3 is inserted into the first through hole 43 and fixedly abuts against the stepped surface. In this embodiment, the adjustment tube 3 is fixedly installed on the operating handle 4 by plugging, so that the adjustment tube 3 has a longer insertion stroke, and after the electrode is inserted, it is more stable and will not move or shake slightly relative to the electrode needle 1. Its length is longer, and it is also convenient to insert from the needle tip of the electrode needle 1.

[0046] Combination Figure 4a , 4b and Figure 5 In this embodiment, the electrode needle 1 is cylindrical in shape as a whole, and its cross section is divided into an electrode inner pole 11, a first insulating layer 12, an electrode outer pole 13, and a second insulating layer 14 from the inside to the outside in the radial direction, that is, the electrode needle 1 includes a multi-layer structure, which is an electrode inner pole 11 located in the center, a first insulating layer 12 surrounding the outer periphery of the electrode inner pole 11, an electrode outer pole 13 surrounding the outer periphery of the first insulating layer 12, and a second insulating layer 14 surrounding the outer periphery of the electrode outer pole 13. The central axes of the electrode inner pole 11, the first insulating layer 12, the electrode outer pole 13, and the second insulating layer 14 are the same straight line. The outer surfaces of the front ends of the electrode inner pole 11, the first insulating layer 12, the electrode outer pole 13, and the second insulating layer 14 form the electrode inner pole 11 region 21, the first insulating region 22, the outer pole region 23, and the second insulating region 24, respectively.

[0047] In the present application, the length of the needle tip 2 of the electrode needle 1 in its axial direction is 0.6 mm to 1.5 mm. For example, the length of the needle tip 2 in its axial direction can be designed to be 0.6 mm, 0.8 mm, 1 mm, 1.2 mm or 1.5 mm, etc., and the needle tip 2 is a conical structure, which is conducive to piercing the eye and reaching the target tissue; Figure 5As shown, the angle α between the generatrix of the conical structure of the needle tip 2 and the central axis Z is 10 to 20°, preferably 12 to 16°, so that the needle tip can meet the strength requirements when it is sharp enough, and the needle tip will not curl or produce burrs due to being too sharp. The length of the electrode needle 1 exposed from the adjustment tube 3 is set to 0.5mm to 2.5mm, that is, the depth range of the electrode needle 1 inserted into the eye is set to 0.5mm to 2.5mm. For example, the insertion depth can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 2mm, 2.2mm, 2.3mm, 2.5mm. The specific ablation depth is determined by the clinician according to the patient's condition and the proposed radiofrequency ablation parameters.

[0048] Preferably, the tip of the electrode needle 1 is in a conical structure, the outer diameter of the electrode needle 1 is in the range of 0.3mm to 0.8mm, the electrode inner pole 11 is in the shape of a solid cylinder as a whole, with a diameter of 0.1mm to 0.4mm, and the material of the electrode inner pole 11 can be a conductive high-strength material such as tungsten, platinum, platinum-iridium alloy, etc. The first insulating layer 12 of the electrode needle 1 is in the shape of a cylindrical sleeve as a whole and is fixedly combined with the outer surface of the electrode inner pole 11, the wall thickness of the first insulating layer 12 is 0.03mm to 0.2mm, and the material of the first insulating layer 12 can be polyimide (PI), polyetheretherketone (PEEK), ceramics, parylene, PTFE, glass, ABS, PC, POM, etc. The electrode outer pole 13 of the electrode needle 1 is a cylindrical sleeve fixedly combined with the outer surface of the first insulating layer 12, and the wall thickness of the electrode outer pole 13 is 0.05mm-0.2mm; the material of the electrode outer pole 13 can be stainless steel, such as 2Cr13, 1Cr13, 1Cr18Ni9, SUS304(L), SUS316(L), SUS430, etc.; it can also be titanium alloy, such as TC4, etc. The second insulating layer 14 of the electrode needle 1 is a cylindrical sleeve fixedly combined with the outer surface of the electrode outer pole 13, and the wall thickness of the second insulating layer 14 is 0.03mm-0.2mm. The material of the second insulating layer 14 can be polyimide (PI), polyetheretherketone (PEEK), ceramic, parylene, PTFE, glass, ABS, PC, POM, etc. The conical needle tip of the electrode needle 1 can be formed by grinding so that the conical tip of the electrode needle 1 smoothly transitions from the tip to the bottom to form the inner pole region 21, the first insulating region 22, the outer pole region 23 and the second insulating region 24 in sequence, so that the electrode needle 1 can easily pierce the eye and reach the target tissue during puncture.

[0049] Further, such as Figure 6As shown, in this embodiment, the length of the electrode inner pole 11 in the axial direction is greater than the length of the first insulating layer 12, the electrode outer pole 13, and the second insulating layer 14, and the end of the electrode inner pole 11 away from the needle tip 2 (i.e., the end inside the operating handle 4) is electrically connected to the PCB board 5 inside the operating handle 2 through a connecting wire or a metal connecting tube 36 sleeved on the electrode inner pole 11. The second insulating layer 14 is partially peeled off at one end of the electrode needle 1 located inside the operating handle 4, exposing the electrode outer pole 13, and the electrode outer pole 13 is electrically connected to the PCB board 5 through a connecting wire. The connecting wire and the PCB board 5 can be electrically connected by welding, such as micro-resistance welding, laser welding, brazing, etc.

[0050] In the present application, the ablation host 100 can also identify the model of the electrode through the PCB board 5. After the RF ablation electrode of the present application and the ablation host 100 are connected, the ablation host 100 can intelligently identify the model of the electrode of the present application based on the electrode information stored in the PCB board 5. For example, the PCB board 5 can identify the registration ID of the electrode needle 1 and transmit it to the ablation host connected to the operating handle 4. The ablation host stores a database of registration IDs of all electrode models. If the registration ID of the electrode is not included in the database, the PCB board 5 cannot be matched with the electrode and the electrode cannot be used. Only when the electrode information stored in the PCB board 5 is identified or matched by the ablation host 100 can the electrode be used normally.

[0051] In some embodiments, control buttons can be set on the PCB board 5, and the control buttons are exposed on the surface of the operating handle 4. For example, a switch button and a current or power adjustment button are set. The switch button is used to turn on or off the power of the electrode needle, and the current or power adjustment button is used to adjust the current or power output from the ablation host 100 to the electrode needle 1. An indicator light or a display screen can also be set on the PCB board 5. The indicator light or the display screen is exposed on the surface of the operating handle 4. The working status and parameter information of the ablation electrode can be displayed through the status indicator light or the display screen.

[0052] Combination Figure 7 and Figure 8 The outer surface of one end of the adjusting tube 3 is provided with a numerical mark 31 (which can also be a scale mark), and the numerical mark 31 is used to display the length of the electrode needle 1 exposed in the adjusting tube 3, that is, the numerical mark 31 shows the depth of the electrode needle 1 piercing the eyeball; the outer surface of the other end of the adjusting tube 3 is also provided with an in-place mark 32, and the in-place mark 32 is used to indicate that this end of the adjusting tube 3 is used to connect with the operating handle 4, and to mark the connection and insertion in place. By setting the in-place mark 32, one end of the numerical mark 31 of the adjusting tube 3 can be distinguished, which is convenient for the operator to quickly find the adjustment length of the adjusting tube and select a suitable adjusting tube 3 to insert the electrode needle 1.

[0053] In this embodiment, the in-place mark 32 is a color area 321 or a color ring 322 set on the surface of the adjustment tube 3. The length range of the color area 321 or the color ring 322 indicates the depth of the adjustment tube 3 inserted into the first through hole 43. Since the bottom end of the first through hole 43 has a step surface, when the adjustment tube 3 is fully inserted into the first through hole 43, the end of the adjustment tube 3 contacts the step surface and cannot move further, indicating that the adjustment tube 3 is plugged in place. At this time, the color area 321 or the color ring 322 is also completely hidden in the first through hole 43. The operator can judge whether the adjustment tube 3 is inserted in place by whether the color area 321 or the color ring 322 is completely hidden, so as to ensure that the length of the electrode needle 1 exposed in the adjustment tube 3 reaches the set length (the depth of insertion into the eye tissue). After the adjustment tube 3 is plugged in place, the length of the electrode needle 1 exposed in the adjustment tube 3 is the set length.

[0054] In some embodiments, the surface of one end of the adjusting tube 3 inserted into the first through hole 43 has an external thread, and an internal thread matching the external thread is arranged in the first through hole 43, and the adjusting tube 3 can be fixed in the first through hole 43 by screwing, and as the length of the adjusting tube 3 screwed into the first through hole 43 increases, the length of the electrode needle 1 exposed from the adjusting tube 3 also increases, and a numerical mark is arranged along the axial direction on the outer surface of the electrode needle 1, and the numerical mark shows the length of the electrode needle 1 exposed from the adjusting tube 3. That is, by rotating the adjusting tube 3, it is more convenient to accurately adjust the length of the electrode needle 1 exposed from the adjusting tube 3.

[0055] Combination Fig.10a , 10b and Fig.11 In this embodiment, the ablation electrode also includes an electrode needle protection cap 6, which has a hollow conical structure and can be covered along the direction from narrow to wide of the handle end 41 and fixed on the periphery of the handle end 41, thereby protecting the electrode needle 1.

[0056] In this embodiment, the electrode needle protection cap 6 is provided with a second through hole 61, and the second through hole 61 connects the front and rear sides of the electrode needle protection cap 6 to allow the adjustment tube 3 to pass through the second through hole 61. The electrode needle protection cap 6 is provided with a strip through hole 62 extending along the axial direction and penetrating the electrode needle protection cap 6 in the radial direction of the electrode needle protection cap 6. A plurality of (at least two) strip clamping arms 63 are formed in the strip through hole 62. The free end of each strip clamping arm 63 extends toward the direction close to the second through hole 61. The strip clamping arm 63 can clamp the adjustment tube 3 after elastic deformation. A clamping portion is formed on the inner side of each strip clamping arm 63. A groove extending along the length direction of the clamping surface (i.e., the inner surface of the clamping portion) is provided. When the free ends of the plurality of clamping arms 63 are pressed together, a guide channel is formed by the groove on the inner surface of the clamping portion to guide the adjustment tube 3 to be inserted from the second through hole 61 and aligned into the first through hole 43.

[0057] Specifically, in this embodiment, two strip-shaped clamping arms 63 are provided and are symmetrical to each other. The inner sides of the two strip-shaped clamping arms 63 facing each other are provided with protruding clamping portions 631, and the clamping surfaces of the clamping portions 631 are respectively provided with semicircular grooves (not shown). When the adjustment tube 3 passes through the second through hole 61, the grooves on the inner surfaces of the clamping portions 631 form a guide channel, and the guide channel of the clamping portions 631 guides the adjustment tube 3 to align and enter the first through hole 43. In some other embodiments, the protruding clamping portion may not be used, and the entire inner side surface of the strip-shaped clamping arm 63 may form a clamping portion.

[0058] In this embodiment, the adjusting tube 3 can be inserted with the help of the electrode needle protective cap 6. The specific operating steps for installing the adjusting tube 3 are as follows: the operator selects the required model of the adjusting tube 3, inserts the selected adjusting tube 3 from the second through hole 61 of the electrode needle protective cap 6, and presses multiple strip clamping arms 63 at the same time to centrally tighten the adjusting tube 3, and forms a guide channel for guiding the adjusting tube 3 to align with the first through hole 43 of the insertion operating handle 4, thereby realizing the rapid insertion of the adjusting tube 3.

[0059] The ablation electrode in this embodiment can freely replace the adjustment tube 3 of different lengths with the help of the electrode needle protection cap 6, which plays a good guiding role in replacing the adjustment tube 3, facilitates the rapid insertion of the adjustment tube 3 into the operating handle 4, and can quickly obtain the required depth of the electrode needle 1 inserted into the eye. Compared with the existing adjustment method, it has the advantages of simplicity, speed and low cost.

[0060] Further, combined with Figures 1 to 3 In the present embodiment, the operating handle 4 is slender as a whole, and includes a handle end 41 and a handle body 42 . The handle end 41 and the handle body 42 are detachably connected to facilitate replacement of the operating handle 4 with different handle ends 41 .

[0061] Combination Figure 6 , wherein the handle end 41 is a tapered structure, the cross section of the handle end 41 is circular, and the cross section size of the front side of the handle end 41 is smaller than the cross section size of the rear side of the handle end 41, and a first annular flange 411 is provided around the middle part near the handle end 41, and abutment portion 412 is formed between the first annular flange 411 and the rear side of the handle end 41, and the cross section size of the abutment portion 412 gradually decreases and then gradually increases in the direction from the first annular flange 411 to the rear side of the handle end 41. When the operator's hand is holding the operating handle 4, the middle finger of the hand can be abutted against the abutment portion 412 to prevent the finger from slipping when using the operating handle 4, thereby improving the comfort of the hand holding the operating handle 14.

[0062] In this embodiment, the first through hole 43 passes through the opposite front and rear sides of the handle end 41, and the electrode needle 1 is fixedly connected to the first through hole 43 by a permanent fixed connection (such as injection molding or gluing, etc.) or a non-permanent fixed connection (such as a detachable connection such as plug-in, snap-on, screw-on, etc.).

[0063] In this embodiment, a positioning sleeve 413 is provided inside the handle end 41, the positioning sleeve 413 coincides with the central axis of the handle end 41, and the free end of the positioning sleeve 413 further extends toward the rear side of the handle end 41, and the handle end 41 is detachably connected to the handle body 42 through the positioning sleeve 413. For example, one of the positioning sleeve 413 and the handle body 42 is provided with a first positioning groove 414, and the other of the positioning sleeve 413 and the handle body 42 is provided with a positioning protrusion 421 that matches the first positioning groove 414.

[0064] In this embodiment, a plurality of first positioning grooves 414 are arranged around the positioning sleeve 413, and a plurality of positioning protrusions 421 matching the first positioning grooves 414 are arranged inside the handle body 42. The positioning protrusions 421 can be inserted into the first positioning grooves 414 to fix the handle end 41 to the handle body 42. Preferably, there are two first positioning grooves 414, which are symmetrically arranged around the positioning sleeve 413.

[0065] In some embodiments, a plurality of positioning protrusions may be provided in the circumferential direction of the positioning sleeve 413, and a plurality of first positioning grooves matching the positioning protrusions may be provided correspondingly inside the handle body 42. The positioning protrusions may be inserted into the first positioning grooves to fix the handle end 41 to the handle body 42.

[0066] Combination Figure 6 and Fig. 9 In this embodiment, a counterweight cavity 45 is provided inside the positioning sleeve 413, and a counterweight block 46 is inserted in the cavity 45. The counterweight block 46 can improve the user's operating feel. The counterweight block 46 is a tubular structure, and a plurality of second positioning grooves 47 corresponding to the first positioning groove 414 are also provided around the counterweight block 46. After the positioning protrusion 421 is inserted through the first positioning groove 414, it is further inserted into the second positioning groove 47, so as to strengthen the fixed connection between the handle end 41 and the handle body 42, and at the same time, it also prevents the counterweight block 46 from being separated from the counterweight cavity 45. Two U-shaped grooves 48 are symmetrically arranged along the circumferential direction at one end of the counterweight block 46 close to the bottom wall of the counterweight cavity 45, so that when the counterweight block 46 is inserted into the counterweight cavity 45, the U-shaped groove 48 is inserted into the radial rib (not shown) in the handle end 41. This also ensures that after the counterweight block 46 is installed, the positions of the first positioning groove 414 and the second positioning groove 47 can correspond to each other, so as to facilitate the insertion of the positioning protrusion 421 in the handle body 42.

[0067] In this embodiment, further, combined with Figure 1 and Figure 2 In this embodiment, the rear side (rear end) of the handle end 41 is connected to the front side (front end) of the handle body 42. A second annular flange 422 is provided around the front side of the handle body 42, and a gripping portion 423 is provided at a portion of the handle body 42 close to the second annular flange 422. The cross section of the gripping portion 423 is circular, and the cross-sectional size of the gripping portion 423 gradually decreases and then gradually increases in the direction from the second annular flange 422 to the rear side of the handle body 42. When the operator holds the operating handle 4, the thumb and index finger of the hand can hold the gripping portion 423. The structures of the gripping portion 423 and the aforementioned abutting portion 412 are completely ergonomically designed, which improves the comfort of holding the operating handle 4.

[0068] Further, such as Figure 3 , Fig.12 , Fig.13 as well as Fig.14 As shown, the handle body 42 includes a left shell 8 and a right shell 9 that are symmetrically arranged, and an upper shell 7 that is arranged on the top of the left shell 8 and the right shell 9 and connected to the left shell 8 and the right shell 9. The materials of the left shell 8, the right shell 9 and the upper shell 7 can be ABS, POM, PEEK, PVC, PET, PA, other medical grade polymer materials or engineering modified plastics.

[0069] In this embodiment, an opening 75 is provided in the top middle area of ​​the left shell 8 and the right shell 9 to allow the upper shell 7 to be inserted into the installation groove 76 formed by the two openings 75. In order to make the shape of the opening 75 more compatible with the cross-sectional variation of the handle body 42, the opening 75 is preferably an arc-shaped opening.

[0070] A first fixing block 71 is provided at the bottom of the upper shell 7 near the front end, and a first fixing slot 77 is provided on the lower side of the front end of each opening 75. The first fixing block 71 can be inserted and fixed in a first fixing hole 78 formed by the two first fixing slots 77, that is, the front end of the upper shell 7 can be engaged in the first fixing hole 78 through the first fixing block 71.

[0071] Plug-in card blocks 72 are provided on both sides of the middle area of ​​the bottom of the upper shell 7, and a plug-in card slot 79 matching the plug-in card block 72 is provided on the lower side of the middle part of the opening 75. The two ends of the upper shell 7 can be respectively plugged into the plug-in card slots 79 in the left shell 8 and the right shell 9 through the plug-in card block 72.

[0072] A second fixing block 81 is provided at the bottom of the upper shell 7 near the rear end, and a second fixing slot 70 is provided on the lower side of the rear end of each opening 75. The second fixing block 81 can be inserted and fixed in a second fixing hole 82 formed by the two second fixing slots 70, that is, the rear end of the upper shell 7 can be engaged in the second fixing hole 82 through the second fixing block 81.

[0073] exist Fig.13 In the embodiment, a threading hole 83 is further provided at the rear end of the upper shell 7, and the threading hole 83 can be used for a signal cable connected to the electrode needle 1 or the PCB board to pass through.

[0074] Combination Fig.14 In this embodiment, a first horizontal convex rib 25 is provided at the bottom edge of the opening 75, and a second horizontal convex rib 26 parallel to the first horizontal convex rib 25 is also provided on the lower side of the first horizontal convex rib 25, and a plug-in slot 79 is formed by a partial gap between the first horizontal convex rib 25 and the second horizontal convex rib 26.

[0075] A slot stopper 27 is also provided at the front end of the second horizontal convex rib 26, and the slot stopper 27 and the inner wall of the handle body 42 form a first fixed slot 77. The slot stopper 27 has an L-shaped cross section, and includes a horizontal stopper 28 that is in the same horizontal plane as the second horizontal convex rib 26 and connected to the second horizontal convex rib 26, and a vertical stopper 29 that is perpendicular to the horizontal stopper 28, and the top of the vertical stopper 29 is connected to the inner wall of the handle body 42.

[0076] Further, such as Fig.12 As shown, a mounting protrusion 73 is provided in the middle area of ​​the bottom of the upper housing 7, and the mounting protrusion 73 is integrally formed with the plug-in card blocks 72 on both sides. A mounting cavity 74 extending toward its upper surface is provided on the lower surface of the mounting protrusion 73 to allow the PCB board 5 to be accommodated and fixed in the mounting cavity 74.

[0077] A plurality of support blocks 33 extending in a direction away from the second horizontal convex rib 26 are further provided in the middle portion of the second horizontal convex rib 26 . There are at least two support blocks 33 , which are respectively used to support the front and rear sides of the PCB board 5 .

[0078] In this embodiment, reinforcing ribs 34 are further provided on the inner walls at the rear ends of the left shell 8 and the right shell 9 , and tightening grooves 35 are provided on the reinforcing ribs 34 . The tightening grooves 35 are used to restrain the signal cables connecting the PCB board 5 and the external ablation host.

[0079] like Fig.16As shown, in some other embodiments of the present invention, the adjustment assembly includes a guide rail 87, a slider 85 and a drive assembly. The guide rail 87 is arranged in the operating handle 4 and slidably cooperates with the slider 85. The electrode needle 1 is fixed to the slider 85, and the drive assembly can drive the slider 85 to move along the axial direction of the guide rail 87. The drive assembly includes a drive motor 84 and an adjustment screw 86 connected to the rotating shaft of the drive motor 84. The adjustment screw 86 and the slider 85 are slidably cooperated. When the drive motor 84 drives the adjustment screw 86 to rotate, the slider 85 can move along the axial direction of the adjustment screw 86, thereby driving the electrode needle 1 to move in the front and rear direction of the operating handle 4, so as to adjust the depth of the electrode needle 1 penetrating the eye tissue; at the same time, when the ablation electrode is not in use, the electrode needle 1 can be hidden inside the operating handle 4 to enhance the protection of the electrode needle 1.

[0080] In this embodiment, the drive motor 84 is also electrically connected to the PCB board 5, and a control button is also provided on the surface of the operating handle 4. The control button is electrically connected to the PCB board 5. The control button can be used to turn the drive motor 84 on and off and control the forward and reverse rotation of the drive motor 84.

[0081] Further, such as Fig.17 As shown, in some other embodiments, the driving assembly includes a first adjusting gear 88, a second adjusting gear 92 and an adjusting rack 93, the transmission tooth 90 of the first adjusting gear 88 is meshed with the second adjusting gear 92, the second adjusting gear 92 is meshed with the adjusting rack 93, one end of the adjusting rack 93 is fixedly connected to the slider 85, and the electrode needle 1 is fixed on the slider 85.

[0082] A first fixed shaft 89 and a second fixed shaft 91 are provided inside the operating handle 4 . The first adjusting gear 88 can rotate around the first fixed shaft 89 , and the second fixed shaft 91 can rotate around the second fixed shaft 91 .

[0083] The first adjustment gear 88 is at least partially exposed from the operating handle 4 to form a knob. After the first adjustment gear 88 is rotated, the adjustment rack 93 can drive the motor needle 1 to move forward and backward along the operating handle 4 through the second adjustment gear 92, thereby adjusting the depth of the electrode needle 1 penetrating into the eye tissue; at the same time, when the ablation electrode is not in use, the electrode needle 1 can be hidden inside the operating handle 4 to enhance the protection of the electrode needle 1.

[0084] In some other embodiments, the driving component may also be a worm gear or other component capable of adjusting the forward and backward movement of the electrode needle 1. Fig.16 When the adjusting assembly shown in or 17 adjusts the electrode needle 1, the length of the electrode needle 1 extending out of the first through hole 43 can be determined by the moving stroke of the driving assembly to determine the depth of insertion into the eye tissue.

[0085] like Fig.15 As shown, the present invention further provides an ablation device, which includes an ablation host 100 and the above-mentioned ablation electrode, and the ablation host 100 is electrically connected to the ablation electrode.

[0086] In some embodiments, the PCB board 5 is not disposed in the handle body 42 of the above-mentioned cavity, but is integrated inside the connector 200, and the ablation electrode is electrically connected to the ablation host 100 through the connector 200. When in use, the ablation electrode is connected to the ablation host through the connector 200, and the operator determines the treatment plan according to the actual situation of different patients, configures the radiofrequency ablation parameters on the ablation host 100, and determines the exposed length of the electrode needle 1, and then radiofrequency ablation of the eye tissue can be performed. In addition, in addition to radiofrequency ablation, the ablation electrode can also be used for pulse ablation or other ablation methods using electrodes. Different types of ablation hosts 100 need to be replaced for different ablation methods.

[0087] It can be seen that the present invention discloses an ablation electrode, which includes an electrode needle, the front end of the electrode needle is a needle tip, the needle tip is a conical structure, and the conical surface can be divided into an inner pole area, a first insulating area, an outer pole area and a second insulating area in the direction from the cone tip to the cone bottom. After the ablation electrode is electrically connected to the ablation host, an ablation wave is generated between the inner pole area and the outer pole area; it also includes an adjustment tube, which is inserted into the outer surface of the electrode needle and can move axially relative to the electrode needle to adjust the length of the electrode needle exposed in the adjustment tube; it also includes an operating handle, and the electrode needle is installed on the operating handle. The ablation electrode in the present invention can improve the accuracy of the ablation range and avoid damage to adjacent tissues, sclera and conjunctiva. The depth of the electrode needle penetrating into the tissue can be adjusted by the adjustment tube, and the operation is simple and quick.

[0088] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ablation electrode, characterized in that: The ablation electrode comprises: An electrode needle, wherein the front end of the electrode needle is a needle tip, the needle tip is a cone-shaped structure, and the cone surface is divided into an inner pole region, a first insulating region, an outer pole region and a second insulating region in the direction from the cone tip to the cone bottom. When the ablation electrode is energized, an ablation wave is generated between the inner pole region and the outer pole region; An adjusting tube, inserted into the outer surface of the electrode needle and movable axially relative to the electrode needle, for adjusting the length of the electrode needle exposed from the adjusting tube; An operating handle, on which the electrode needle is mounted.

2. The ablation electrode according to claim 1, characterized in that: The electrode needle is cylindrical as a whole, and its cross-section includes an electrode inner pole, a first insulating layer, an electrode outer pole, and a second insulating layer from the inside to the outside in the radial direction. The outer surfaces of the front ends of the electrode inner pole, the first insulating layer, the electrode outer pole, and the second insulating layer correspondingly form the inner pole region, the first insulating region, the outer pole region, and the second insulating region.

3. The ablation electrode according to claim 1, characterized in that: The operating handle is provided with a first through hole, which is a stepped hole with a stepped surface. The first through hole allows the rear end of the electrode needle to pass through and be fixed in the first through hole; the adjustment tube is inserted into the first through hole and fixedly abuts against the stepped surface.

4. The ablation electrode according to claim 3, characterized in that: The regulating tube has a plurality of models with different lengths and sizes. By replacing regulating tubes of different models, different lengths of the electrode needle exposed from the regulating tube can be allowed to be allowed to be different.

5. The ablation electrode according to claim 4, characterized in that: The outer surface of one end of the adjusting tube is provided with a numerical mark or a scale mark, and the numerical mark or the scale mark is used to display the length of the electrode needle exposed from the adjusting tube; preferably, the outer surface of the adjusting tube away from the one end is also provided with a connection in place mark, and the connection in place mark is used to indicate that this end of the adjusting tube is used to be connected to the operating handle and to mark the connection being inserted into place.

6. The ablation electrode according to any one of claims 3 to 5, characterized in that: The operating handle is slender as a whole, and includes a handle end and a handle body. The first through hole passes through the front and rear sides of the handle end, and the rear side of the handle end is connected to the handle body.

7. The ablation electrode according to claim 6, characterized in that: The handle end has a conical structure, and the cross-sectional dimension of the front side of the handle end is smaller than the cross-sectional dimension of the rear side of the handle end. A first annular flange is provided around the middle portion near the handle end, and abutment portion is formed between the first annular flange and the rear side of the handle end. The cross-sectional dimension of the abutment portion gradually decreases and then gradually increases in the direction from the first annular flange to the rear side of the handle end.

8. The ablation electrode according to claim 7, characterized in that: The handle end includes a positioning sleeve, which coincides with the central axis of the handle end and the free end of the positioning sleeve further extends toward the rear side of the handle end; one of the positioning sleeve and the handle body is provided with a first positioning groove, and the other of the positioning sleeve and the handle body is provided with a positioning protrusion that cooperates with the first positioning groove.

9. The ablation electrode according to claim 8, characterized in that: A second annular flange is provided on the front side of the handle body, and a gripping portion is provided at a position of the handle body close to the second annular flange. The cross-sectional size of the gripping portion gradually decreases and then increases in the direction from the second annular flange to the rear side of the handle body.

10. The ablation electrode according to claim 6, characterized in that: The handle body comprises a left shell and a right shell which are symmetrically arranged, and an upper shell which is arranged on the top of the left shell and the right shell and connected to the left shell and the right shell, and an opening is respectively arranged in the middle area of ​​the top of the left shell and the right shell to allow the upper shell to be inserted into the installation groove formed by the two openings; Preferably, a first fixing block is provided at a position near the front end of the bottom of the upper shell, and a first fixing slot is provided at the lower side of the front end of each of the openings to allow the first fixing block to be inserted and fixed in a first fixing hole formed by the two first fixing slots; Preferably, plug-in card blocks are provided on both sides of the middle area of ​​the bottom of the upper shell, the openings are arc-shaped openings, and a plug-in card slot matching with the plug-in card block is provided on the lower side of the middle part of the arc-shaped opening; Preferably, a PCB board connected to the electrode needle is provided inside the handle body, a mounting protrusion is provided in the bottom middle area of ​​the upper shell body, and the lower surface of the mounting protrusion is provided with a mounting cavity extending toward its upper surface to allow the PCB board to be accommodated and fixed in the mounting cavity.

11. The ablation electrode according to claim 6, characterized in that: It also includes an electrode needle protection cap, which is a hollow conical structure and is used to cover the electrode needle and is fixed to the periphery of the handle end; Preferably, the electrode needle protection cap is provided with a second through hole, and the second through hole connects the front and rear sides of the electrode needle protection cap, so as to allow the regulating tube to pass through the second through hole; Preferably, the electrode needle protection cap is provided with a strip-shaped through hole which penetrates the electrode needle protection cap in a radial direction and extends along the axial direction thereof, at least two strip-shaped clamping arms are formed in the strip-shaped through hole, the free end of each strip-shaped clamping arm extends toward a direction close to the second through hole, and the strip-shaped clamping arm can clamp the regulating tube after elastic deformation; Preferably, a clamping portion is formed on the inner side of each of the strip-shaped clamping arms, and a groove extending along the length direction of the clamping surface is provided on the clamping surface of the clamping portion. When the free ends of the at least two clamping arms are pressed together, a guide channel is formed by the groove on the clamping portion to guide the adjusting tube to be inserted from the second through hole and enter the first through hole.

12. An ablation device, characterized in that: It comprises an ablation host and the ablation electrode according to any one of claims 1 to 11, wherein the ablation host is electrically connected to the ablation electrode.

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