Electrode structure, in-ear plasma electrode tool bit and in-ear surgical instrument

Abstract

The utility model provides an electrode structure, an in-ear plasma electrode tool bit and an in-ear surgical instrument. The electrode structure comprises a rod part and a working part, the rod part comprises a first near-end section and a first far-end section which are axially connected; the thickness of the working part is gradually reduced in the direction away from the axis of the working part, and the thickness of the working part refers to the size of the working part in the axial direction of the working part. The working part is connected with the first far-end section, and an obtuse angle is formed between the working part and the first near-end section. The electrode structure can be used as an inner electrode of the in-ear plasma electrode tool bit, so that on the basis of the characteristic that the thickness of the working part is reduced in the direction away from the third area, on one hand, the power of the in-ear plasma electrode tool bit can be improved; therefore, the amount of plasmas formed by excitation when the in-ear plasma electrode cutter head works is increased so as to improve the operation efficiency, and on the other hand, the edge of the working part can be used as a stripping tool so as to conveniently strip diseased tissues.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an electrode structure, an intraocular plasma electrode tip, and an intraocular surgical instrument. Background Technology

[0002] Intraocular plasma electrode tips are widely used in the cutting and coagulation procedures of surgeries such as endoscopic tympanic membrane repair, endoscopic tympanoplasty, endoscopic facial nerve decompression, and transcanal-promontory vestibular schwannoma resection. During the procedure, the intraocular plasma electrode tip generates a low-temperature plasma layer at its tip by an electric field exciting a medium (e.g., physiological saline). Charged particles in this layer break the bonds between tissue molecules, causing tissue decomposition and achieving effects such as vaporization, cutting, ablation, perforation, and coagulation. In practice, it is desirable for the intraocular plasma electrode tip to generate sufficient plasma during operation to improve surgical efficiency, and it is further desired that the plasma electrode tip can also dissect diseased tissue. Utility Model Content

[0003] The purpose of this invention is to provide an electrode structure, an intraocular plasma electrode tip, and an intraocular surgical instrument, which aim to shorten the time of intraocular surgery and improve surgical efficiency.

[0004] To achieve the above objectives, this utility model provides an electrode structure, comprising:

[0005] The rod portion includes a first proximal segment and a first distal segment connected axially; and,

[0006] The working part has a thickness that gradually decreases in a direction away from its own axis; the thickness of the working part refers to the dimension of the working part in its own axial direction; the working part is connected to the first distal segment, and the working part and the first proximal segment form an obtuse angle.

[0007] Optionally, the surface of the working part facing the proximal end is a plane.

[0008] Optionally, the maximum thickness of the portion of the working part that connects with the rod is greater than the maximum thickness of other portions of the working part.

[0009] Optionally, an obtuse angle is formed between the first proximal segment and the first distal segment, and the working part is located within the obtuse angle formed by the first proximal segment and the first distal segment;

[0010] The first distal segment has a first side and a second side that are radially opposite each other, and the second side is connected to the working part; the projection of the first distal segment on the preset plane includes a first edge line and a second edge line that are opposite each other, the first edge line corresponds to the first side, the second edge line corresponds to the second side, and the first edge line is an arc with the concave side facing the second side;

[0011] The preset plane is parallel to the axis of the first proximal segment and the axis of the working part.

[0012] Optionally, the outer diameter of the first distal segment decreases in the direction from the proximal end to the distal end.

[0013] Optionally, the working part is a ring structure; and / or,

[0014] The outer contour of the working part is circular or elliptical.

[0015] To achieve the above objectives, this utility model also provides an intraocular plasma electrode tip, comprising:

[0016] The hollow outer electrode includes a second distal segment and a second proximal segment connected axially;

[0017] A hollow first insulating structure is partially inserted into the outer electrode, and the distal end of the first insulating structure extends out from the distal end of the outer electrode.

[0018] The electrode structure as described in the preceding claim is partially disposed within the first insulating structure, and the first distal segment and the working portion extend from the distal end of the first insulating structure; and,

[0019] A second insulating structure is disposed on a portion of the outer surface of the second proximal segment.

[0020] Optionally, the second insulating structure is an insulating coating applied to a portion of the outer surface of the second proximal segment.

[0021] To achieve the above objectives, this utility model also provides an intraocular surgical instrument, comprising:

[0022] Hollow handle;

[0023] As described above, the proximal end of the intraocular plasma electrode tip extends into the interior of the handle and is connected to the handle;

[0024] The power supply cable includes a first cable and a second cable, the distal end of the first cable extending into the handle and electrically connected to the proximal end of the rod, and the distal end of the second cable extending into the handle and electrically connected to the second proximal segment.

[0025] Optionally, the intraocular surgical instrument further includes a cannula fixation frame, which is partially disposed within the handle and connected to the handle, with the distal end of the cannula fixation frame extending out from the distal end of the handle;

[0026] The proximal end of the intraocular plasma electrode tip is insulated from the cannula fixing frame.

[0027] Compared with the prior art, the electrode structure, intraocular plasma electrode tip, and intraocular surgical instruments of this invention have the following advantages:

[0028] The aforementioned electrode structure includes a rod and a working part; the rod includes a first proximal segment and a first distal segment connected axially; the thickness of the working part gradually decreases in a direction away from its own axis, and the thickness of the working part refers to the dimension of the working part in its own axial direction; the working part is connected to the first distal segment, and an obtuse angle is formed between the working part and the first proximal segment. This electrode structure can be used as the internal electrode of an intraocular plasma electrode tip. Therefore, based on the characteristic that the thickness of the working part decreases in a direction away from the third region, on the one hand, the power of the intraocular plasma electrode tip can be increased, thereby increasing the amount of plasma generated when the intraocular plasma electrode tip is working to improve surgical efficiency; on the other hand, the edge of the working part can also be used as a dissection tool to easily dissect diseased tissue.

[0029] Furthermore, the surface of the working part facing the proximal end is planar, which can increase the contact area between the working part and the tissue, thereby improving the coagulation effect when using the intraauricular electrode tip for coagulation. Attached Figure Description

[0030] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:

[0031] Figure 1 This is a schematic diagram of the electrode structure provided by this utility model according to an embodiment;

[0032] Figure 2 yes Figure 1 Enlarged view of point A;

[0033] Figure 3 This is a schematic diagram of the electrode structure provided according to one embodiment of the present invention. Figure 2 and Figure 1 The observation directions are different;

[0034] Figure 4 This is a schematic diagram of an intraocular plasma electrode tip provided according to an embodiment of the present invention;

[0035] Figure 5This is a schematic diagram of an intraocular plasma electrode blade provided according to an embodiment of the present invention. Figure 5 and Figure 4 The observation directions are different;

[0036] Figure 6 This is a schematic diagram of an intraocular surgical instrument provided according to an embodiment of the present invention.

[0037] [The annotations in the attached figures are explained below]:

[0038] 1-Intraacular surgical tool, 10-Intraacular plasma electrode tip, 20-Handle, 30-Cannula fixation frame, 40-Cable sheath, 100-Electrode structure, 110-Rod, 111-First proximal segment, 112-First distal segment, 1121-First side, 1122-Second side, 120-Working part, 121-Working surface, 122-Inner hole, 200-Outer electrode, 300-First insulation structure, 400-Second insulation structure. Detailed Implementation

[0039] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components related to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex.

[0040] Furthermore, while each embodiment described below possesses one or more technical features, this does not imply that users of this utility model must simultaneously implement all technical features in any embodiment, or can only separately implement some or all technical features in different embodiments. In other words, provided it is feasible, those skilled in the art can selectively implement some or all technical features in any embodiment, or selectively implement a combination of some or all technical features in multiple embodiments, based on the disclosure of this utility model and depending on design specifications or implementation requirements, thereby increasing the flexibility in implementing this utility model.

[0041] As used herein, the singular forms “a,” “an,” and “the” include plural objects, and the plural form “a plurality” includes two or more objects, unless otherwise expressly indicated. As used herein, the term “or” is generally used to include the meaning of “and / or,” unless otherwise expressly indicated, and the terms “install,” “connect,” and “link” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Connections can be mechanical or electrical. Connections can be direct or indirect through an intermediate medium, and can represent internal communication between two elements or an interaction between two elements. Relational terms such as “first,” “second,” etc., are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor do they indicate relative importance or implicitly specify the number of indicated technical features. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] The terms “proximal” and “distal” used in this article are defined based on the relative positions and orientations of the various components and parts of a medical device. Although they are not restrictive, “distal” usually refers to the end of the medical device that first enters the patient’s body during normal use, while “proximal” refers to the end that is closer to the operator.

[0043] To make the objectives, advantages, and features of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to conveniently and clearly illustrate the objectives of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0044] Figure 1 and Figure 3 The electrode structure 100 provided in the embodiment of this utility model is shown from different orientations. Figure 2 yes Figure 1 An enlarged diagram of point A. (See diagram below.) Figures 1 to 3As shown, the electrode structure 100 includes a rod portion 110 and a working portion 120. The rod portion 110 includes a first proximal segment 111 and a first distal segment 112 connected axially. The thickness of the working portion 120 gradually decreases in a direction away from its own axis S1. The working portion 120 is connected to the first distal segment 112, and the angle α formed between the working portion 120 and the first proximal segment 111 is an obtuse angle, so that the axis S1 of the working portion 120 intersects or is not in plane with the axis S2 of the first proximal segment 111. Here, "the thickness of the working portion 120" refers to the dimension of the working portion 120 in its own axial direction.

[0045] The electrode structure 100 can be used as an intraocular plasma electrode tip 10 (e.g., Figure 4 and Figure 5 The inner electrode (shown) of the intraauricular plasma electrode tip 10 has the following advantages due to the decreasing thickness of the working part 120 of the electrode structure 100 along the direction away from its own axis S1: ① The thinner edge of the working part 120 is beneficial to increasing the output power of the intraauricular plasma electrode tip 10 during operation, thereby increasing the plasma generated by the excitation medium of the intraauricular plasma electrode tip 10, thus improving surgical efficiency; ② The sharper edge of the working part 120 is equivalent to a blade, which has good cutting, scratching, scraping and digging effects, enabling the working part 120 to be used as a dissection tool to dissect diseased tissue.

[0046] The present invention does not impose any special limitation on the outer contour of the working part 120, which can have any suitable shape, such as a circle, an ellipse or other shapes.

[0047] Preferably, such as Figure 1 and Figure 2 As shown, the maximum thickness h1 of the portion of the working part 120 that connects with the rod part 110 is greater than the maximum thickness h2 of other portions of the working part 120. This increases the connection area between the working part 120 and the rod part 110, thereby improving the connection strength between the rod part 110 and the working part 120, and thus enhancing the overall strength of the electrode structure 100, reducing the risk of breakage at the connection between the rod part 110 and the working part 120 during use.

[0048] Furthermore, the rod portion 110 and the working portion 120 are an integral structure. In practice, the first and second structures can be formed in one step by stamping, with the first structure serving as the rod portion 110, and the working portion 120 formed by precision carving the second structure. This forming method helps to further improve the overall strength of the electrode structure 100, thereby further reducing the risk of breakage at the connection between the rod portion 110 and the working portion 120 during use.

[0049] Optionally, such as Figure 1 and Figure 2 As shown, the surface of the working part 120 facing the proximal end is the working surface 121, which is preferably a plane. This is because when performing a coagulation operation on tissue using the working part 120, the working surface 121 comes into contact with the tissue, and the planar working surface 121 allows for a larger contact area with the tissue, improving the coagulation effect. Furthermore, the included angle α mentioned above refers to the angle formed between the working surface 121 and the first proximal segment 111.

[0050] Optionally, such as Figure 3 As shown, the working part 120 is an annular structure with an inner hole 122. Thus, the inner hole 121 and the suction channel can be used to aspirate residues from the ear surgery process. The configuration of the suction channel when performing ear surgery using the ear plasma electrode tip 10 is well known to those skilled in the art and will not be described in detail here.

[0051] Optionally, an angle β is formed between the first proximal segment 111 and the first distal segment 112, and the angle β is an obtuse angle. The working part 120 is located within the angle β.

[0052] A plane parallel to the axis S2 of the first proximal segment 111 and the axis S2 of the working part 120 is defined as a preset plane. Figure 1 As shown in the diagram, the preset plane is the surface of a paper or a plane parallel to the surface of the paper. The first distal segment 112 has two opposing sides, namely a first side 1121 and a second side 1122, and the second side 1122 is connected to the working part 120. When the first distal segment 112 and the working part 120 are projected onto the preset plane, the projection of the first distal segment 112 has opposing first edge lines and second edge lines, wherein the first edge line corresponds to the first side 1121, and the second edge line corresponds to the second side 1122. Therefore, the second edge line is closer to the projection of the working part 120 than the first edge line.

[0053] In the intraocular plasma electrode tip 10, the first distal segment 112 is directly exposed. Therefore, it is preferable that the first edge line is an arc with the concave side facing the first edge line. This can improve the matching between the first distal segment 112 and the shape of the ear canal, making it easier for the first distal segment 112 to enter the ear and reach the lesion site.

[0054] More preferably, the outer diameter of the first distal segment 112 decreases along the proximal to distal direction to further improve the matching of the first distal segment 112 with the shape of the ear canal.

[0055] The second objective of this utility model is to provide a... Figure 4 and Figure 5 The intraocular plasma electrode tip 10 is shown. Figure 4 and Figure 5 As shown, the intraocular plasma electrode tip 10 includes an outer electrode 200, a first insulating structure 300, a second insulating structure 400, and an electrode structure 100 as described above. Both the outer electrode 200 and the first insulating structure 300 are elongated hollow components. The outer electrode 200 further includes a second proximal segment 210 and a second distal segment 220 connected axially. The first insulating structure 300 partially penetrates the outer electrode 200, and its distal end extends from the distal end of the outer electrode. The electrode structure 100 partially penetrates the first insulating structure 300, and the first distal segment 112 and the working part 120 extend from the distal end of the first insulating structure 300. The second insulating structure 400 is disposed on a portion of the outer surface of the second proximal segment 111.

[0056] In other words, compared with the existing intraocular plasma electrode blades, the intraocular plasma electrode blade 10 provided in this embodiment of the present invention uses the electrode structure 100 as the inner electrode, so that the intraocular plasma electrode blade 10 can have higher output power to generate more plasma, improve surgical efficiency, and enable the intraocular plasma electrode blade 10 to have good cutting, scratching, scraping and digging effects, so as to facilitate the removal of diseased tissue.

[0057] Optionally, the second insulating layer structure 400 is an insulating coating applied to a portion of the outer surface of the second proximal segment 210. This reduces the outer diameter of the intraocular plasma electrode tip 10, making it easier for the tip to enter the ear and minimizing damage to the ear canal.

[0058] Optionally, the outer diameter of the external electrode 200 decreases from the proximal end to the distal end, so that the intraocular plasma electrode tip 10 can more easily enter the ear, and also reduces damage to the ear canal and improves the bending strength of the external electrode 200.

[0059] The third objective of this utility model is to provide a... Figure 6 The intraocular surgical instrument 1 shown is as follows. Figure 6 As shown, the intraocular surgical instrument 1 includes a handle 20, a power cable (not shown), and an intraocular plasma electrode tip 10 as previously described. The handle 20 has a hollow structure. The proximal end of the intraocular plasma electrode tip 10 extends into the interior of the handle 20 and is connected to the handle 20. The power cable includes a first cable and a second cable. The distal end of the first cable extends into the interior of the handle 20 and is electrically connected to the proximal end of the rod portion 110. The distal end of the second cable extends into the interior of the handle 20 and is connected to the proximal end of the external electrode 200.

[0060] It is understood that the proximal end of the rod 110 extends from the proximal end of the first insulating structure 300 so that the proximal end of the rod 110 can be electrically connected to the distal end of the first cable. The area of ​​the second proximal segment 210 not covered by the second insulating structure 400 is located within the handle 20 and is electrically connected to the second cable.

[0061] The proximal end of the intraauricular plasma electrode tip 10 can be directly or indirectly connected to the handle 20. In an optional embodiment, the intraauricular surgical instrument 1 further includes a cannula fixation frame 30, the proximal end of which is disposed inside the handle 20 and connected to it. The distal end of the cannula fixation frame 30 extends from the distal end of the handle 20. The proximal end of the intraauricular plasma electrode tip 10 is disposed on the cannula fixation frame 30 and is insulated from it. That is, the intraauricular plasma electrode tip 10 is connected to the handle 20 through the cannula fixation frame 30.

[0062] The sleeve fixing frame 30 may be made of insulating material, or the sleeve fixing frame 30 may include a body and an insulating layer disposed on the outer surface of the body, thereby achieving insulation between the sleeve fixing frame 30 and the intraocular plasma knife head 10.

[0063] In addition, a cable sheath 40 is provided at the proximal end of the handle 20. The proximal end of the power supply cable can extend from the proximal end of the cable sheath 40 to facilitate connection to an external power source.

[0064] While the present invention has been disclosed above, it is not limited thereto. Those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and variations.

Claims

1. An electrode structure, characterized in that, include: The rod portion includes a first proximal segment and a first distal segment that are axially connected; as well as, The working part has a thickness that gradually decreases in a direction away from its own axis; the thickness of the working part refers to the dimension of the working part in its own axial direction; the working part is connected to the first distal segment, and the working part and the first proximal segment form an obtuse angle.

2. The electrode structure according to claim 1, characterized in that, The surface of the working part facing the proximal end is a plane.

3. The electrode structure according to claim 1 or 2, characterized in that, The maximum thickness of the part of the working section that connects with the rod is greater than the maximum thickness of other parts of the working section.

4. The electrode structure according to claim 3, characterized in that, An obtuse angle is formed between the first proximal segment and the first distal segment, and the working part is located within the obtuse angle formed by the first proximal segment and the first distal segment; The first distal segment has a first side and a second side that are radially opposite each other, and the second side is connected to the working part; the projection of the first distal segment on the preset plane includes a first edge line and a second edge line that are opposite each other, the first edge line corresponds to the first side, the second edge line corresponds to the second side, and the first edge line is an arc with the concave side facing the second side; The preset plane is parallel to the axis of the first proximal segment and the axis of the working part.

5. The electrode structure according to claim 4, characterized in that, The outer diameter of the first distal segment decreases from the proximal end to the distal end.

6. The electrode structure according to claim 1, characterized in that, The working part has a ring structure; and / or, The outer contour of the working part is circular or elliptical.

7. An intraocular plasma electrode tip, characterized in that, include: The hollow outer electrode includes a second distal segment and a second proximal segment connected axially; A hollow first insulating structure is partially inserted into the outer electrode, and the distal end of the first insulating structure extends out from the distal end of the outer electrode. The electrode structure as described in any one of claims 1-6 is partially disposed within the first insulating structure, and the first distal segment and the working portion extend from the distal end of the first insulating structure; as well as, A second insulating structure is disposed on a portion of the outer surface of the second proximal segment.

8. The intraocular plasma electrode tip according to claim 7, characterized in that, The second insulating structure is an insulating coating applied to a portion of the outer surface of the second proximal segment.

9. An intraauricular surgical instrument, characterized in that, include: Hollow handle; The intraocular plasma electrode tip as described in claim 7 or 8, wherein the proximal end of the intraocular plasma electrode tip extends into the interior of the handle and is connected to the handle; The power supply cable includes a first cable and a second cable, the distal end of the first cable extending into the handle and electrically connected to the proximal end of the rod, and the distal end of the second cable extending into the handle and electrically connected to the second proximal segment.

10. The intraocular surgical instrument according to claim 9, characterized in that, The intraocular surgical instrument also includes a cannula fixation frame, which is partially disposed within the handle and connected to the handle, with the distal end of the cannula fixation frame extending out from the distal end of the handle; The proximal end of the intraocular plasma electrode tip is insulated from the cannula fixing frame.

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