Electrode front end assembly and radiofrequency ablation electrode

Abstract

The present invention relates to an electrode front end assembly and a radio frequency ablation electrode, and belongs to the technical field of medical devices. The radio frequency ablation electrode comprises a connecting assembly, a handle assembly, an electrode rod assembly and an electrode front end assembly, and the electrode front end assembly comprises a support body, an electrode seat, a side electrode assembly and a front end electrode assembly, the electrode seat is embedded in the support body, the side electrode assembly is distributed on the electrode seat, and the front end electrode assembly extends from the electrode seat through the front end of the support body to the back side of the support body, so that the side electrode assembly and the front end electrode assembly together form a continuous J-shaped ablation area. The electrode front end assembly and radio frequency ablation electrode provided by the present invention can ablate the part located on the side, the part located on the front end, and even ablate part of the part located on the back side, thereby achieving all-round ablation of the narrow position.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an electrode front end component and a radio frequency ablation electrode. Background Art

[0002] The four main symptoms of allergic rhinitis are sneezing, runny nose, nasal itching and nasal congestion. The common treatments for rhinitis are medication and surgery. The traditional surgical method is vidian nerve section. Since the surgery also cuts off the only parasympathetic nerve fibers that control the secretion of the lacrimal gland, the symptoms of dry eyes are obvious after the operation. In addition, the vidian canal is hidden, vidian nerve section is difficult to operate, has many complications, and has uncertain long-term efficacy. Clinical studies have found that the severance of the posterior nasal nerve causes the loss of the main sensory nerve and parasympathetic nerve sources of the inferior turbinate, significantly reduces the secretion of the middle and inferior turbinate mucosa, and significantly reduces the sensitivity of the mucosa, which can permanently alleviate the main clinical symptoms of allergic rhinitis and reduce complications. However, the traditional method of this surgery still has problems such as large surgical trauma, more intraoperative bleeding, and difficulty for clinicians to master.

[0003] The surgical space in the nose is extremely narrow. In some special positions, such as the rear end of the middle nasal meatus and the connection between the middle turbinate and the inferior turbinate, it is difficult for existing electrodes to cover. The reason is that the existing electrode knife rod itself is straight, the middle section of the inferior turbinate is convex, and the rear section of the middle nasal meatus is relatively concave, so the existing electrode cannot contact the root of the posterior nasal nerve in the rear section of the middle nasal meatus well. Therefore, there is a rhinitis treatment device and production method disclosed in application number CN202310302376.7. The patent bends the front end of the knife rod to one side of the electrode body, and deflects the electrode head part at an angle so that it can enter the rear end of the middle nasal meatus along the protruding position of the inferior turbinate and contact the root of the posterior nasal nerve. Clinically, it is found that although the above scheme can contact the main trunk of the posterior nasal nerve near the sphenopalatine nerve and has a certain ablation effect, the fit between the entire electrode plane and the tissue is not good, which affects the overall ablation effect. Due to the narrow nasal meatus, the electrode is bent, and it is even more impossible to ablate the area on the back of the electrode and the narrower position. After analysis, it was found that the main reason for the less than ideal effect was that the entire nasal passage was too narrow and the internal structure was complex. The bulge in the middle section of the inferior turbinate lifted the electrode and then entered the concave rear end of the middle nasal passage. Even if various bending treatments were performed on the front end of the knife rod and the electrode head, it was still easy to have poor fit with the tissue.

[0004] The invention patent application with application number CN202311729161.X and the name of the invention is "An ablation component, device and method for the posterior inferior nasal nerve". Starting from the structure of the electrode head, the patent improves the product by changing multiple electrode heads to two electrode groups. In fact, it can only improve the assembly efficiency, but cannot solve the core technical problems of poor fit and unsatisfactory ablation effect. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide an electrode front end assembly and a radiofrequency ablation electrode, which solves the technical problem that the entire electrode plane has a poor fit with the tissue, and it is even more difficult to ablate the area on the back of the electrode and a narrower position. The present invention can ablate the part located on the side, the part located on the front end, and even a part of the dorsal part, thereby achieving all-round ablation of the narrow position.

[0006] The technical solution of the present invention is as follows:

[0007] The present invention provides an electrode front end assembly, comprising a support body, an electrode seat, a side electrode assembly and a front end electrode assembly, wherein the electrode seat is embedded in the support body, the side electrode assembly is distributed on the electrode seat, and the front end electrode assembly extends from the electrode seat through the front end of the support body to the back side of the support body, so that the side electrode assembly and the front end electrode assembly together form a continuous J-shaped ablation area.

[0008] As an option, the side electrode assembly and the front electrode assembly are independently controlled.

[0009] As an optional solution, the side electrode assembly and the front electrode assembly are controlled in a unified manner.

[0010] As an optional solution, the side electrode assembly includes a plurality of positive electrode heads and a plurality of negative electrode heads, and the positive electrode heads and the negative electrode heads have opposite polarities and are arranged alternately.

[0011] As an optional solution, a plurality of the positive electrode heads and a plurality of the negative electrode heads are divided into two electrode rows.

[0012] As an optional solution, a plurality of the positive electrode heads are integrally formed into a positive electrode member, and a plurality of the negative electrode heads are integrally formed into a negative electrode member, and the positive electrode member and the negative electrode member are insulated and integrally injection molded with the electrode holder.

[0013] As an optional solution, the exposed parts of the positive electrode head and the negative electrode head are inclined.

[0014] As an option, the front end electrode assembly includes a positive electrode body and a negative electrode body.

[0015] As an optional solution, the positive electrode body is a positive electrode wire, and the negative electrode body is a negative electrode wire.

[0016] As an optional solution, the positive electrode body is a positive electrode sheet, and the negative electrode body is a negative electrode sheet.

[0017] As an optional solution, a plurality of the positive electrode heads and a plurality of the negative electrode heads form two electrode rows, the positive electrode body is aligned with the first electrode row, and the negative electrode body is aligned with the second electrode row.

[0018] As an optional solution, the positive electrode body is adjacent to the adjacent negative electrode head, and the negative electrode body is adjacent to the adjacent positive electrode head.

[0019] As an optional solution, the positive electrode body is adjacent to the adjacent negative electrode head, and the negative electrode body is adjacent to the adjacent positive electrode head.

[0020] As an optional scheme, the margin between the insertion end of the positive electrode body and the corresponding negative electrode head, or the margin between the insertion end of the negative electrode body and the corresponding positive electrode head is the first margin, and the margin between the positive electrode head and the negative electrode head in the electrode row is the second margin, and the first margin and the second margin are equal.

[0021] As an optional solution, the support body includes a main body and a cap, the front end of the main body is open and closed by the cap, and both ends of the positive electrode body and the negative electrode body extend into the cap.

[0022] As an optional solution, the support body has a connecting portion, the outermost end of the side electrode assembly forms an electrode plane, and the electrode plane is arranged at an angle with the center line of the connecting portion, and the angle between the two is an acute angle.

[0023] As an optional solution, the electrode front end component further includes a temperature control component, which is embedded in the electrode seat and exposed between the side electrode components.

[0024] As an optional solution, the thickness and / or width of the support body gradually decreases from the back to the front.

[0025] The present invention also provides a radiofrequency ablation electrode, comprising a connection assembly, a handle assembly, an electrode rod assembly and the above-mentioned electrode front end assembly which are connected in sequence.

[0026] As an optional solution, the electrode rod assembly is pre-bent.

[0027] As an optional solution, the electrode rod assembly includes a reinforcement section and a plastic section, and the bending angle of the plastic section is adjustable.

[0028] The beneficial effects of the present invention are:

[0029] The electrode front-end assembly and radiofrequency ablation electrode provided by the present invention are provided with a front-end electrode assembly added to the front end, and the front-end electrode assembly extends from the electrode seat to the back side of the support body via the front end of the support body, so that a continuous J-shaped ablation area is formed when the front-end electrode assembly works in cooperation with the side electrode assembly. Since the front-end electrode assembly extends from the electrode seat to the back side of the support body via the front end of the support body, it not only increases the area on the side that is not covered by the electrode, but also increases the ablation of the front-end electrode, prolongs the length that the electrode can act (because the nasal passage and the electrode itself are very small, a slight increase in the electrode action length can also improve the fit and ablation effect), and also increases the electrode effect on the back side. Therefore, the present invention can ablate the area located on the side, the area located at the front end, and even part of the area located on the back side, thereby achieving all-round ablation of the narrow position, solving the technical problem that the fit between the entire electrode plane and the tissue is not good, and the area on the back of the electrode and the narrower position cannot be ablated. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0031] Figure 1 Schematic diagram of the structure of the electrode front end assembly provided in Example 1 of the present invention Figure 1 ;

[0032] Figure 2 Schematic diagram of the structure of the electrode front end assembly provided in Example 1 of the present invention Figure 2 ;

[0033] Figure 3 Schematic diagram of the structure of the electrode front end assembly provided in Example 1 of the present invention Figure 3 ;

[0034] Figure 4 Schematic diagram of the structure of the electrode front end assembly provided in Example 1 of the present invention Figure 4 ;

[0035] Figure 5 Schematic diagram of the structure of the electrode front end assembly provided in Example 1 of the present invention Figure 5 ;

[0036] Figure 6A cross-sectional view of an electrode front end assembly provided in Embodiment 1 of the present invention;

[0037] Figure 7 A schematic diagram of the exploded structure of the electrode front end assembly provided in the first embodiment of the present invention;

[0038] Figure 8 A schematic diagram of a partial structure (without a support seat) of an electrode front end assembly provided in Embodiment 1 of the present invention;

[0039] Fig. 9 A schematic diagram of the electric field distribution of the electrode front end assembly provided in the first embodiment of the present invention;

[0040] Fig.10 A schematic diagram of a J-shaped ablation area of ​​an electrode front end assembly provided in Embodiment 1 of the present invention;

[0041] Fig.11 Schematic diagram of the structure of the radiofrequency ablation electrode provided in the second embodiment of the present invention Figure 1 ;

[0042] Fig.12 Schematic diagram of the structure of the radiofrequency ablation electrode provided in the second embodiment of the present invention Figure 2 ;

[0043] Fig.13 Schematic diagram of the structure of the radiofrequency ablation electrode provided in the second embodiment of the present invention Figure 3 ;

[0044] Fig.14 for Fig.12 Schematic diagram of the front-end partial structure;

[0045] Fig.15 A schematic diagram of the structure of a radiofrequency ablation electrode provided in Embodiment 3 of the present invention;

[0046] Fig.16 for Fig.15 Schematic diagram of the front-end partial structure;

[0047] Fig.17 A schematic diagram of the matching relationship between the electrode rod assembly and the electrode front end assembly of the radiofrequency ablation electrode provided in the third embodiment of the present invention;

[0048] Fig.18 This is a schematic diagram of the use status of the radiofrequency ablation electrode provided in the third embodiment of the present invention.

[0049] Icons: 100-radiofrequency ablation electrode; 10-electrode front end assembly; 20-electrode rod assembly; 30-handle assembly; 40-connecting assembly; 11-support body; 12-electrode holder; 13-side electrode assembly; 14-front end electrode assembly; 15-temperature control assembly; 110-main body; 111-cap; 112-connecting part; 130-positive electrode piece; 131-negative electrode piece; 132-positive electrode body; 133-negative electrode body; 134-J-shaped ablation area; 135-electrode plane; 210-reinforcement section; 211-plastic section. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0054] Embodiment 1:

[0055] Please refer to Figure 1-Figure 5 As shown, the first embodiment of the present invention provides an electrode front end assembly 10, which is a component of a radiofrequency ablation electrode (please refer to the second embodiment) and is mainly used for ablation and hemostasis in rhinitis surgery.

[0056] First of all, it should be noted that the "front" and "rear" in this embodiment are determined by the positional relationship between the head end and the tail end of the electrode front end assembly 10, with the head end at the front and the tail end at the rear. The tail end of the electrode front end assembly 10 is used to connect with structures such as the electrode rod assembly of the radiofrequency ablation electrode.

[0057] Please combine Figure 6-Figure 7As shown, the electrode front end assembly 10 is mainly composed of a support body 11, an electrode seat 12, a side electrode assembly 13 and a front end electrode assembly 14. Both the side electrode assembly 13 and the front end electrode assembly 14 can contact human tissues such as nasal concha mucosa to output radio frequency energy. The side electrode assembly 13 and the front end electrode assembly 14 can form a current loop independently or in combination (please refer to the reference electrode assembly 11 for details). Fig. 9 As shown), the nasal mucosa tissue and the posterior inferior nasal nerve are ablated, and each component of the electrode front end assembly 10 is discussed in detail below.

[0058] The shape and structure of the support body 11 are not limited and can refer to the prior art. In this embodiment, the support body 11 has a receiving cavity with one side open.

[0059] The material of the support body 11 is not limited. Generally speaking, the support body 11 needs to be made of insulating material, such as ceramic, ABS, etc.

[0060] The size and dimensions of the support body 11 can be set as needed. In this embodiment, the width and / or length of the support body 11 can be gradually reduced in the direction from the back to the front, that is, the width of the support body 11 is gradually reduced, or the length of the support body 11 is gradually reduced, or the width and length of the support body 11 are reduced at the same time, etc. This reduction can be linear or nonlinear, as long as the cross-sectional area of ​​the front half of the support body 11 is ensured to be smaller than the cross-sectional area of ​​the rear half of the support body 11.

[0061] In other embodiments, the support body 11 may be a solid structure, but a through hole or wire groove may be provided for wiring; the front and rear cross-sectional areas of the support body 11 may be equal or substantially equal, or larger in the front and smaller in the back.

[0062] The support body 11 can be processed by injection molding, sintering, turning or other processing methods. The support body 11 can be an integral structure, or can be the following structure: Figure 6 , Figure 7 As shown, the support body 11 includes a main body 110 and a cap 111. One side and the front end of the main body 110 are open, and the front end opening of the main body 110 is closed by the cap 111. The connection method between the main body 110 and the cap 111 is not limited, for example, the two are bonded, snapped, or buckled.

[0063] The electrode holder 12 is embedded in the support body 11, a part of the electrode holder 12 extends into the accommodating cavity of the support body 11 and one side is exposed, and the exposed surface of the electrode holder 12 can be flush with the side of the support body 11, or it can protrude from the side of the support body 11, or it can be lower than the side of the support body 11. The structure of the electrode holder 12 can be set as needed, such as a rectangular block, a stepped shape, etc., and the specific structure can refer to the prior art. In this embodiment, a step can be set at the side opening of the support body 11, and the electrode holder 12 can be embedded in the step. Of course, it is also possible for the support body 11 not to be provided with a step.

[0064] The electrode holder 12 is made of insulating material, such as ceramic, ABS, etc. The connection method between the electrode holder 12 and the support body 11 is not limited, such as bonding, clamping, buckling, etc.

[0065] The electrode holder 12 may be manufactured by any method, such as stamping, turning, etc. In the present embodiment, the electrode holder 12 is manufactured by injection molding.

[0066] The side electrode assembly 13 is distributed on the electrode holder 12, and a part of the side electrode assembly 13 is buried in the electrode holder 12, and another part of the side electrode assembly 13 is exposed from one side of the electrode holder 12. Of course, it is also possible that the side electrodes are exposed from both sides of the electrode holder 12.

[0067] The style of the side electrode assembly 13 is not limited, and can refer to the prior art. The side electrode assembly 13 is mainly composed of a number of positive electrode heads and a number of negative electrode heads. The positive electrode heads and the negative electrode heads have opposite polarities and are arranged alternately. The positive electrode heads and the negative electrode heads can be made of filament electrodes, sheet electrodes, etc. In the present embodiment, the positive electrode heads and the negative electrode heads are made of sheet electrodes, and the width and thickness of the sheet electrodes can be set as needed. One end of the positive electrode head and the negative electrode head is exposed, and the height of the exposed part of the positive electrode head and the negative electrode head can be set as needed, generally 0-3mm, preferably 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc. The positive electrode head and the negative electrode head need to be connected to the positive and negative poles of the RF host through a connecting wire or the like.

[0068] The number of positive electrode heads and negative electrode heads is not limited, for example, two, three, four, etc. Generally speaking, the number of the two is equal. Of course, the number of the two is not equal. In this embodiment, the number of positive electrode heads and negative electrode heads is four, and the four positive electrode heads and the four negative electrode heads are divided into two electrode rows. The two electrode rows are defined as a first electrode row and a second electrode row, respectively. The two electrode rows are arranged opposite to each other. The first electrode row and the second electrode row may be parallel to each other or may not be parallel to each other. For example, the first electrode row and the second electrode row are arranged in an eight-shaped or inverted eight-shaped distribution.

[0069] Each electrode row has two positive electrode heads and two negative electrode heads, a total of four electrode heads, and the positive electrode heads and negative electrode heads in each electrode row are alternately distributed along the front-to-back direction. Preferably, in the first electrode row and the second electrode row, the positive electrode heads are opposite to the negative electrode heads; the front end of the first electrode row is the negative electrode head, and the front end of the second electrode row is the positive electrode head; or the front end of the first electrode row is the positive electrode head, and the front end of the second electrode row is the negative electrode head.

[0070] The spacing between two electrode rows is not limited, and in the same electrode row, the spacing between the positive electrode head and the negative electrode head is not limited. For example, the margin between two electrode rows is 0.6mm-2.2mm, and the margin between the positive electrode head and the negative electrode head in the same row of electrodes is 0.4mm-1.5mm.

[0071] In other embodiments, the arrangement of the positive electrode heads and the negative electrode heads may also adopt other schemes, for example: multiple positive electrode heads and multiple negative electrode heads are distributed in a circle, divided into three or four electrode rows, etc.; or in two electrode rows, the positive electrode heads are opposite to the positive electrode heads, and the negative electrode heads are opposite to the negative electrode heads or relatively staggered.

[0072] One end of the positive electrode head and the negative electrode head is exposed from one side of the electrode holder 12 as a working part, and the working part can be perpendicular to one side of the electrode holder 12, or the following scheme can be adopted: Figure 4 As shown, the exposed parts of the positive electrode head and the negative electrode head are inclined, and the inclination direction is not limited. Preferably, the working parts of the two electrode rows are gradually inclined outward, that is, they are trumpet-shaped from bottom to top, and the angle ∠A between the working parts of the two electrode rows can be 0°-70°, so that the sides of the positive electrode head and the negative electrode head are in contact with the tissue as much as possible, increasing the contact area between the electrode and the tissue, and achieving a better ablation effect.

[0073] A plurality of positive electrode heads and a plurality of negative electrode heads can be independently arranged, for example, four positive electrode heads are independently arranged, and four negative electrode heads are independently arranged. Due to the small space of the nasal cavity, the overall radial cross-sectional size of the electrode front end assembly 10 is small, generally within 5 mm, that is, the front end of the electrode front end assembly 10 can be covered by a circle with a diameter less than or equal to 5 mm. If it is independently arranged, other structures are necessarily required to weld or electrically connect the electrode heads of the same polarity. Since the size of each component is very small, it is difficult to operate in actual production and the welding reliability is poor. Therefore, the following scheme can also be adopted for improvement: a plurality of positive electrode heads are integrally stamped or cast as a positive electrode 130; a plurality of negative electrode heads are integrally stamped or cast as a negative electrode 131. The positive electrode 130 and the negative electrode 131 are integrally injection molded with the electrode holder 12, and the positive electrode 130 and the negative electrode 131 are insulated.

[0074] Specifically, taking the example of four positive electrode heads integrally stamped and formed into the positive electrode member 130, the positive electrode member 130 includes a connecting piece and four positive electrode heads, the four positive electrode heads are parallel or substantially parallel, and the positive electrode heads and the connecting piece are perpendicular to each other and can be electrically conductive to each other. When wiring, it is only necessary to electrically connect the wire to the connecting piece or any one of the positive electrode heads. In other embodiments, the connecting piece can also be replaced with other styles, such as a mesh structure, a sheet structure, etc., and it is also possible that the positive electrode head and the connecting piece are not perpendicular.

[0075] Correspondingly, the negative electrode member 131 includes a connecting piece and four negative electrode heads, which are mutually conductive. The structure of the negative electrode member 131 may be similar to or different from that of the positive electrode member 130 .

[0076] The positive electrode member 130 and the negative electrode member 131 are connected to the electrode holder 12 as a whole by injection molding, and the positive electrode member 130 and the negative electrode member 131 are insulated, that is, there is a gap between each position of the positive electrode member 130 and the negative electrode member 131 or it is blocked by the electrode holder 12. In this way, there is no need to use other means to weld or electrically connect multiple positive electrode heads or multiple negative electrode heads, which can effectively improve the accuracy and production and installation efficiency and reduce costs.

[0077] In addition, the support body 11 and the front end electrode assembly 14, or the electrode holder 12 and the temperature control assembly 15, etc. can be integrally injection molded, further saving assembly time and improving efficiency. Of course, the support body 11 and the front end electrode assembly 14, or the electrode holder 12 and the temperature control assembly 15 can also be produced independently and then installed.

[0078] The side electrode assembly 13 can ablate the lesion site adjacent to the side of the electrode front end assembly 10, and the front end electrode assembly 14 can ablate the lesion site adjacent to the front end of the electrode front end assembly 10. The front end electrode assembly 14 starts from the front end of the electrode holder 12, passes through the front end of the support body 11, and extends to the back side of the support body 11.

[0079] The side electrode assembly 13 and the front electrode assembly 14 cooperate with each other to form a continuous J-shaped ablation area 134. That is, one side, the front end, and a part of the other side of the electrode front assembly 10 can stop bleeding and ablate the adjacent lesion.

[0080] The definition of the "J-shaped ablation area 134" mentioned in this embodiment is as follows: the "J-shaped ablation area 134" is a curved surface, and the cross section of the curved surface is roughly J-shaped. Figure 3 In FIG. 1 , the projection of the J-shaped ablation area 134 on the paper is roughly a rectangle; Fig.10 In the figure, the projection of the J-shaped ablation area 134 on the paper is roughly J-shaped. In some embodiments, the "J-shaped ablation area 134" can also be a combination of several intersecting planes or planes and curved surfaces, for example, Fig.10 In the embodiment, the left side, upper side and right side of the J-shaped ablation area 134 are all planes, and two adjacent planes can be smoothly transitioned; or the left side of the J-shaped ablation area 134 is a plane, and the upper side and right side are curved surfaces, etc. There are many optional shapes of the "J-shaped ablation area 134", which are not listed here one by one.

[0081] The front electrode assembly 14 has any style, and can be a sheet electrode or a wire electrode. The front electrode assembly 14 and the support body 11 can be independently provided or fixed by injection molding. In the present embodiment, the front electrode assembly 14 includes a positive electrode body 132 and a negative electrode body 133. The positive electrode body 132 and the negative electrode body 133 can be wire-shaped. The positive electrode body 132 is a positive electrode wire, and the negative electrode body 133 is a negative electrode wire. The diameters of the positive electrode body 132 and the negative electrode body 133 are not limited, and are generally 0-2 mm, preferably 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc. The outermost height of the front electrode assembly 14 can be lower than the outermost height of the side electrode assembly 13, that is, the diameters of the positive electrode body 132 and the negative electrode body 133 are smaller than the height of the exposed parts of the positive electrode head and the negative electrode head; the outermost height of the front electrode assembly 14 can also be higher than or equal to the outermost height of the side electrode assembly 13.

[0082] The positive electrode body 132 and the negative electrode body 133 are arranged side by side with a certain distance between them. The positive electrode body 132 and the negative electrode body 133 can be parallel or substantially parallel to each other, or they can be non-parallel. For example, the positive electrode body 132 and the negative electrode body 133 are arranged in an eight-shaped or inverted eight-shaped shape. Both the positive electrode body 132 and the negative electrode body 133 start from the front end of the electrode holder 12, pass through the front end of the support body 11, and extend to the back side of the support body 11.

[0083] Both ends of the positive electrode body 132 and the negative electrode body 133 extend into the support body 11 . In this embodiment, both ends of the positive electrode body 132 and the negative electrode body 133 can extend into the cap 111 , and both the positive electrode body 132 and the negative electrode body 133 extend along the outer surface of the cap 111 .

[0084] The positive electrode body 132 and the positive electrode member 130 can be provided independently, or they can be integrally formed or welded; similarly, the negative electrode body 133 and the negative electrode member 131 can be provided independently, or they can be integrally formed or welded.

[0085] The positions of the front electrode assembly 14 and the side electrode assembly 13 may be coordinated with each other or may be unrelated. In this embodiment, the positive electrode body 132 may be aligned with the first electrode row, and the negative electrode body 133 may be aligned with the second electrode row, so that the width of the ablation area at each location of the electrode front end assembly 10 is approximately equal. Of course, in some embodiments, the positive electrode body 132 may not be aligned with the first electrode row, and / or the negative electrode body 133 may not be aligned with the second electrode row.

[0086] Preferably, please combine Figure 8 , Fig. 9 As shown, the positive electrode body 132 has an opposite polarity to the negative electrode head at the front end of the first electrode row, and the negative electrode body 133 has an opposite polarity to the positive electrode head at the front end of the second electrode row. This arrangement enables the side electrode assembly 13 and the front electrode assembly 14 to form a continuous ablation area, and the ablation effect is better. In other embodiments, the following scheme can also be adopted: the positive electrode body 132 has the same polarity as the positive electrode head at the front end of the first electrode row, and the negative electrode body 133 has the same polarity as the negative electrode head at the front end of the second electrode row.

[0087] Optionally, the margin between an insertion end of the positive electrode body 132 (i.e., the position where the positive electrode body 132 begins to enter the support body 11) and the corresponding electrode row, and between an insertion end of the negative electrode body 133 and the corresponding electrode row is 0.4mm-1.5mm. Preferably, the margin between the insertion end of the positive electrode body 132 and the corresponding negative electrode head, or between the insertion end of the negative electrode body 133 and the corresponding positive electrode head is the first margin, and the margin between the positive electrode head and the negative electrode head in the same electrode row is the second margin, and the first margin and the second margin may be equal. This arrangement makes the overall ablation area more uniform and the ablation effect better. Of course, it is also possible for the first margin and the second margin to be unequal.

[0088] In other embodiments, the style of the front-end electrode assembly 14 may also adopt but is not limited to the following scheme: the positive electrode body 132 is a positive electrode sheet, the negative electrode body 133 is a negative electrode sheet, the positive electrode sheet and the negative electrode sheet are arranged side by side, and there is a certain distance between the two. The positive electrode sheet and the negative electrode sheet start from the front end of the electrode holder 12, pass through the front end of the support body 11, and extend to the back side of the support body 11. The arrangement of the positive electrode sheet and the negative electrode sheet can refer to the arrangement of the positive electrode wire and the negative electrode wire. Or the front-end electrode assembly 14 includes three electrode wires, and the polarities between any two adjacent electrode wires are opposite, and the spacing between any two adjacent electrode wires is equal or substantially equal. Or the front-end electrode assembly 14 includes two electrode wires, the polarities of the two electrode wires are opposite, one of the electrode wires is U-shaped, and the other electrode wire is inserted into the inside of the U-shaped electrode wire from the opening, and the two are not in contact. Or the electrode wire of the front-end electrode assembly 14 is serrated, spiral, wavy, etc.

[0089] The side electrode assembly 13 and the front electrode assembly 14 can be controlled in a unified manner or independently.

[0090] If the side electrode assembly 13 and the front electrode assembly 14 are controlled in a unified manner, the connection and control method between the two is not limited. For example, the positive electrode body 132 and the positive electrode component 130 are integrally formed or welded, and the negative electrode body 133 and the negative electrode component 131 are integrally formed or welded; or the positive electrode body 132 and the positive electrode component 130 are independently arranged, and the negative electrode body 133 and the negative electrode component 131 are independently arranged, and the side electrode assembly 13 and the front electrode assembly 14 are controlled by two parallel circuits, and the two parallel circuits are controlled by the same switch.

[0091] If the side electrode assembly 13 and the front electrode assembly 14 are independently controlled, the positive electrode body 132 and the positive electrode member 130 are independently provided, and the negative electrode body 133 and the negative electrode member 131 are independently provided. The control method of the side electrode assembly 13 and the front electrode assembly 14 is not limited. For example, the side electrode assembly 13 can be connected to the host output through a cable alone and a switch S1 can be set. At the same time, the front electrode assembly 14 can also be connected to the host output through a cable alone and a switch S2 can be set. When switches S1 and S2 are closed respectively, the side electrode assembly 13 and the front electrode assembly 14 can be controlled to work independently; when switches S1 and S2 are closed at the same time, the side electrode assembly 13 and the front electrode assembly 14 can work simultaneously. Medical staff can control different switches according to the ablation requirements of different clinical parts. In addition, switches S1 and S2 can also be controlled independently by relays.

[0092] The support body 11 has a connecting portion 112, which is used to connect to the electrode rod assembly of the radiofrequency ablation electrode. The center line of the connecting portion 112 can also be regarded as the center line of the front end of the electrode rod assembly. The outermost end of the side electrode assembly 13 forms an electrode plane 135. The center line of the connecting portion 112 is used as a reference line. The electrode plane 135 and the reference line can be arranged in parallel or at an angle. In this embodiment, please combine Figure 5 As shown, the electrode plane 135 is aligned with the reference line (at Figure 5 The reference line is translated upward for a distance) and the angle ∠B between the two is an acute angle. The degree of ∠B can be set as needed, such as 5°, 10°, 15°, etc., that is, in the direction from back to front, the electrode plane 135 gradually tilts toward the rear side of the support body 11 (that is, the back side of the exposed side of the electrode holder 12). Such a setting can make the electrode front end assembly 10 better enter the target area.

[0093] In addition, the electrode front end assembly 10 may further include a temperature control assembly 15, the temperature control assembly 15 is embedded in the electrode holder 12, a portion of the temperature control assembly 15 is exposed, and the exposed portion is located between two electrode rows of the side electrode assembly 13. The structure of the temperature control assembly 15 is not limited, for example, the temperature control assembly 15 includes a temperature sensor and a heating element, the temperature sensor is used to detect the temperature, and the heating element is used for heating, etc. Of course, the temperature control assembly 15 can also adopt a mature product in the prior art.

[0094] The temperature control component 15 is mainly used to detect and feedback the temperature near the ablation site, and then transmit the temperature information to the matching temperature-controlled radiofrequency ablation system, i.e., the host. The host can make timely adjustments according to the temperature information, such as heating, to control the temperature. The temperature value can be set as needed, such as 60°C, 70°C, etc., so as to reduce the damage to the mucosa and recover faster after surgery. The temperature-controlled ablation method does not require surgery, and minimally invasive surgery can achieve less or even no bleeding during the operation.

[0095] Of course, in some embodiments, the electrode front end assembly 10 may not be provided with the temperature control assembly 15 .

[0096] The production method of the electrode front end assembly 10 provided in this embodiment is as follows:

[0097] The positive electrode member 130 and the negative electrode member 131 are processed respectively by stamping, wherein the positive electrode member 130 has four positive electrode heads, and the negative electrode member 131 has four negative electrode heads;

[0098] The positive electrode member 130 and the negative electrode member 131 are arranged in a specific manner so that the four positive electrode heads and the four negative electrode heads are divided into two electrode rows, each row has two positive electrode heads and two negative electrode heads, and the positive electrode heads and the negative electrode heads are alternately arranged. In the direction from back to front, the polarities of the electrodes in one row are negative, positive, negative, positive, and the polarities of the electrodes in the other row are positive, negative, positive, negative, and negative, respectively;

[0099] The positive electrode member 130 and the negative electrode member 131 are simultaneously integrated on the electrode holder 12 by injection molding, and a portion of the positive electrode head and the negative electrode head are exposed, and the positive electrode member 130 and the negative electrode member 131 both have welding ends, and the welding ends are used to connect with the connecting wires, and the connection method is not limited, such as welding;

[0100] The temperature control component 15 is assembled in the hole reserved on the electrode holder 12. Of course, the temperature control component 15 and the electrode holder 12 can also be integrally injection molded;

[0101] The front electrode assembly 14 is welded to the side electrode assembly 13 or is independently arranged. Specifically, the positive electrode body 132 and the negative electrode body 133 are respectively aligned with the two electrode rows. Preferably, the negative electrode head is closest to the positive electrode body 132, and the positive electrode head is closest to the negative electrode body 133. Of course, in some embodiments, the positive electrode head is closest to the positive electrode body 132, and the negative electrode head is closest to the negative electrode body 133.

[0102] Use connecting wires of different polarities to weld the positive electrode head and the negative electrode head respectively, and lead the connecting wires out from the rear end of the support body 11, and then cover the support body 11.

[0103] The above steps can be increased, decreased, modified, and the order can be adjusted as needed. For example, if multiple positive electrode heads and multiple negative electrode heads are independently arranged, each positive electrode head and each negative electrode head need to be fixed separately, and then the electrode body is obtained by injection molding, or the positive electrode head and the negative electrode head are inserted into the through hole reserved in the electrode body; or if there is no temperature control component 15, the corresponding steps are not required.

[0104] Embodiment 2:

[0105] Please refer to Figure 11-Figure 14 As shown, the second embodiment of the present invention provides a radiofrequency ablation electrode 100, which can be used for ablation and hemostasis in rhinitis surgery.

[0106] The radiofrequency ablation electrode 100 mainly comprises a connection assembly 40, a handle assembly 30, an electrode rod assembly 20 and an electrode front end assembly 10, and the connection assembly 40, the handle assembly 30, the electrode rod assembly 20 and the electrode front end assembly 10 are connected in sequence.

[0107] The structures of the connection assembly 40, the handle assembly 30 and the electrode rod assembly 20 can all refer to the prior art, and the structure of the electrode front end assembly 10 can refer to the structure in the first embodiment. For the contents not mentioned in this embodiment, refer to the first embodiment or the prior art.

[0108] The front end of the electrode rod assembly 20 is connected to the electrode front end assembly 10, and the connection method between the two is not limited, for example, the front end of the electrode rod assembly 20 is plugged into the connection part 112 of the support body 11, or the front end of the electrode rod assembly 20 is bonded to the rear end of the support body 11. The rear end of the electrode rod assembly 20 is connected to the handle assembly 30, and the connection method between the two is not limited, such as plugging, clamping, bonding, etc., so as to support the electrode front end assembly 10, and the connection line of the RF output connection line and the temperature control assembly 15 passes through the interior thereof and is connected to the temperature-controlled RF ablation system through the connection assembly 40.

[0109] The material of the electrode rod assembly 20 is not limited, and can be a metal material such as stainless steel, etc., or a non-metal material such as plastic, etc. In this embodiment, the electrode rod assembly 20 can be a straight rod.

[0110] Embodiment 3:

[0111] Please refer to Fig.15 As shown, the third embodiment of the present invention provides a radiofrequency ablation electrode 100, and the radiofrequency ablation electrode 100 is further improved on the second embodiment.

[0112] The improvement point is: please combine Fig.16As shown, the electrode rod is pre-bent, that is, the electrode rod assembly 20 is divided into at least two sections, and the two sections are arranged at an angle. The angle is not limited and can be set as needed, such as 5°, 10°, 15°, etc.

[0113] The pre-bending scheme of the electrode rod assembly 20 is not limited. For example, the electrode rod assembly 20 is made of a rigid material, that is, the electrode rod assembly 20 cannot be bent again after being pre-bent, and the bending angle of the electrode rod assembly 20 is fixed. The following technical scheme can also be used: Please combine Fig.17 As shown, the electrode rod assembly 20 includes a reinforcement section 210 and a plastic section 211. The reinforcement section 210 is made of a rigid material and cannot be bent. The plastic section 211 can be made of a bendable material such as soft stainless steel. The bending angle of the plastic section 211 is adjustable. The bending angle of the plastic section 211 can be pre-bent by the staff before leaving the factory, or it can be bent on-site by medical staff. It should be noted that the bending of the plastic section 211 requires the application of a force of a preset threshold: only when the force applied to the plastic section 211 is greater than the preset threshold, the plastic section 211 can be bent; when the force applied to the plastic section 211 is less than the preset threshold, the plastic section 211 cannot be bent, so as to avoid abnormal bending of the RF ablation electrode 100 during operation. Please refer to the usage status of the RF ablation electrode 100. Fig.18 shown.

[0114] Generally speaking, the diameter of the reinforcement section 210 can be larger than the diameter of the plastic section 211 , so that it is more flexible to be used in conjunction with an endoscope in the narrow space of the nasal cavity and is less likely to conflict with the endoscope. Of course, the diameter of the reinforcement section 210 can be less than or equal to the diameter of the plastic section 211 .

[0115] Because the surface of the turbinate mucosa is not flat and the root of the posterior inferior nasal nerve is located at a deeper position, the electrode rod assembly 20 can be bent, allowing the side electrode assembly 13 and the front electrode assembly 14 to better adhere to the surface of the turbinate mucosa for radiofrequency ablation.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrode front end assembly, characterized in that: The invention comprises a support body (11), an electrode seat (12), a side electrode assembly (13) and a front electrode assembly (14), wherein the electrode seat (12) is embedded in the support body (11), the side electrode assembly (13) is distributed on the electrode seat (12), and the side electrode assembly (13) comprises a plurality of positive electrode heads and a plurality of negative electrode heads, wherein the positive electrode heads and the negative electrode heads have opposite polarities and are arranged alternately; and the front electrode assembly (14) extends from the electrode seat (12) through the front end of the support body (11) to the back side of the support body (11), so that the side electrode assembly (13) and the front electrode assembly (14) together form a continuous J-shaped ablation area (134).

2. The electrode front end assembly according to claim 1, characterized in that: A plurality of the positive electrode heads are integrally formed into a positive electrode piece (130), and a plurality of the negative electrode heads are integrally formed into a negative electrode piece (131); the positive electrode piece (130) and the negative electrode piece (131) are insulated and are integrally injection-molded with the electrode holder (12).

3. The electrode front end assembly according to claim 1, characterized in that: The exposed portions of the positive electrode tip and the negative electrode tip are inclined.

4. The electrode front end assembly according to claim 1, characterized in that: The front end electrode assembly (14) comprises a positive electrode body (132) and a negative electrode body (133).

5. The electrode front end assembly according to claim 4, characterized in that: A plurality of the positive electrode heads and a plurality of the negative electrode heads form two electrode rows, the positive electrode body (132) is aligned with the first electrode row, and the negative electrode body (133) is aligned with the second electrode row.

6. The electrode front end assembly according to claim 4, characterized in that: The positive electrode body (132) is adjacent to the adjacent negative electrode head, and the negative electrode body (133) is adjacent to the adjacent positive electrode head.

7. The electrode front end assembly according to claim 6, characterized in that: The margin between the insertion end of the positive electrode body (132) and the corresponding negative electrode head, or between the insertion end of the negative electrode body (133) and the corresponding positive electrode head is a first margin, and the margin between the positive electrode head and the negative electrode head in the electrode row is a second margin, and the first margin and the second margin are equal.

8. The electrode front end assembly according to claim 4, characterized in that: The positive electrode body (132) is integrally formed with a plurality of the positive electrode heads, and the negative electrode body (133) is integrally formed with a plurality of the negative electrode heads.

9. The electrode front end assembly according to claim 4, characterized in that: The support body (11) comprises a main body (110) and a cover cap (111); the front end of the main body (110) is open and is closed by the cover cap (111); both ends of the positive electrode body (132) and the negative electrode body (133) extend into the cover cap (111).

10. The electrode front end assembly according to claim 1, characterized in that: The support body (11) has a connecting portion (112), the outermost end of the side electrode assembly (13) forms an electrode plane (135), and the electrode plane (135) is arranged at an angle with the center line of the connecting portion (112), and the angle between the two is an acute angle.

11. The electrode front end assembly according to claim 1, characterized in that: The electrode front end component (10) further comprises a temperature control component (15), wherein the temperature control component (15) is embedded in the electrode seat (12) and exposed between the side electrode components (13).

12. The electrode front end assembly according to claim 1, characterized in that: The thickness and / or width of the support body (11) gradually decreases from the back to the front.

13. A radiofrequency ablation electrode, characterized in that: It comprises a connection assembly (40), a handle assembly (30), an electrode rod assembly (20), and an electrode front end assembly (10) according to any one of claims 1 to 12, which are connected in sequence.

14. The radiofrequency ablation electrode according to claim 13, characterized in that: The electrode rod assembly (20) is pre-bent.

15. The radiofrequency ablation electrode according to claim 13, characterized in that: The electrode rod assembly (20) comprises a reinforcement section (210) and a plastic section (211); the bending angle of the plastic section (211) is adjustable.

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