Plasma electrode for cartilage tissue polishing
By using electrode heads made of retractable structures and memory wires in plasma electrodes, existing products are solved inefficiency and structural rigidity when dealing with small and deep cartilage tissues, achieving more efficient cartilage tissue polishing.
Patent Information
- Application Number
- CN202421300310.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The existing products used for cartilage tissue polishing have problems such as excessive size, rigid structure, inability to adjust angles and trajectories, inefficient and poor attraction effects, making it difficult to effectively deal with narrow cartilage gaps and deep lesion cartilage.
Using a retractable structure, the electrode head is made of memory wire, which can change the angle and trajectory, and change the width of the effective working surface by sliding the electrode head, thereby adapting to cartilage tissue of different sizes and positions.
It realizes flexible adjustment of the electrode head, can better enter narrow tissue gaps, improves grinding efficiency, can be handled on a large scale and operated in detail, and improves the attraction effect.
Smart Images
Figure CN222623056U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of active medical equipment, and in particular relates to a plasma electrode used for polishing cartilage tissue. Background Art
[0002] Products used for cartilage grinding are generally divided into pure mechanical grinding and electric knife grinding.
[0003] Pure mechanical grinding mainly uses a motor to drive the grinding head to grind the cartilage tissue. Affected by the motor speed, over-grinding and under-grinding may occur; since the grinding head is large, the natural gaps in some joint tissues are too small to enter, and the diseased cartilage tissue cannot be cleaned; and the grinding head is driven by a motor, which will make noise when working normally, which will make medical staff irritable over time and cause noise pollution; since a lot of articular cartilage is wrapped in depressions, many grinding heads are fixed and difficult to adjust, and it is not easy to reach the diseased cartilage tissue; in order to enter some narrow tissue gaps, the grinding head will also become smaller, which will reduce the grinding efficiency and require processing bit by bit, which is very time-consuming.
[0004] Currently, most electrosurgical grinding uses a plasma knife to treat diseased tissues. However, the idea of existing plasma products is to make the product with an angled electrode and the angle is fixed. Although cartilage tissue can also be ground, the solidified structure makes the product bulky. In order to enter some narrow tissue gaps, the electrode is made small, resulting in low efficiency and time-consuming cartilage grinding. Even if the existing products are smaller, the outer size of the electrode is ≥2.6mm, which makes it difficult to treat some narrow tissues. Since the existing products use a rigid fixed structure (working pole and return pole), and the two poles are fixed and cannot be moved, some diseased cartilages very deep inside cannot be treated. Since the working pole and return pole are fixed, the effective working surface is fixed and the efficiency is relatively low. Although the existing products have suction, due to the existing structure (small suction hole), it is easy to get blocked and the suction effect is not good.
[0005] In order to solve the problem of electrodes reaching the diseased cartilage tissue very deep inside, some products have been designed with a telescopic structure. However, the extended part of this product is also a semi-rigid structure. The extended part extends along a fixed trajectory and cannot be changed. Due to structural reasons, only partial muscle tissue can be coagulated and hemostatic, but the cartilage tissue cannot be polished. The effective working area of the extended part is also fixed and cannot be changed, which is inefficient and difficult to adapt to existing surgical requirements. Utility Model Content
[0006] In view of this, the purpose of the utility model is to provide a plasma electrode for polishing cartilage tissue, which adopts a retractable structure. The electrode head can enter the narrow gap of cartilage tissue, and the angle and trajectory can be changed to better fit the diseased tissue structure; in addition, as the first electrode moves back and forth, the effective working surface of the electrode head is changed, so that the cartilage tissue can be polished over a large area or finely.
[0007] The technical solution of the utility model is as follows:
[0008] The utility model provides a plasma electrode for polishing cartilage tissue, comprising a first electrode and a second electrode, wherein the first electrode is tubular, the second electrode is slidably arranged inside the first electrode and the two are insulated, the second electrode comprises an electrode head made of a memory metal wire, the electrode head is C-shaped and extends from the front end of the first electrode; the electrode head has a first state in which it extends forward and both sides are spread outward, and a second state in which it contracts backward and both sides are squeezed close together.
[0009] The electrode head forms an effective working surface. When the electrode head is in the first state, the width of the effective working surface gradually increases. When the electrode head is in the second state, the width of the effective working surface gradually decreases.
[0010] As an optional solution, the plasma electrode further includes a first insulating layer and a second insulating layer, the first insulating layer is located on the inner side of the first electrode and the second insulating layer is located on the outer side of the first electrode, and the front end of the first electrode is exposed.
[0011] As an optional solution, the maximum width of the electrode head is greater than the width of the first insulating layer.
[0012] As an optional solution, the second electrode further includes two electrode wires, the electrode wires are inserted into the first electrode, and the two ends of the electrode head are respectively connected to the two electrode wires.
[0013] As an optional solution, the outer side of the electrode wire is coated with a third insulating layer.
[0014] As an optional solution, the electrode heads form an effective working surface, and a side of the electrode head facing the effective working surface is pre-bent.
[0015] As an optional solution, the pre-bending angle of the electrode head is ∠A, wherein 0°<∠A≤90°.
[0016] As an alternative, ∠A is preferably 45°.
[0017] As an optional solution, the plasma electrode further includes a handle, the rear end of the first electrode is connected to the handle, a push button is provided on the handle, the push button is connected to the rear end of the second electrode and is used to push the second electrode to move forward and backward.
[0018] As an optional solution, a scale is provided on the handle, and the scale is adjacent to the push button and is used to display the extended length of the electrode head.
[0019] As an optional solution, the plasma electrode further includes a suction tube, and the suction tube is connected to the first electrode.
[0020] As an optional solution, an insulating sleeve is provided on the handle, the rear end of the first electrode is inserted into the insulating sleeve, and the suction tube and the first electrode are connected through the insulating sleeve.
[0021] The beneficial effects of the utility model are:
[0022] The plasma electrode for cartilage tissue grinding provided by the utility model has the following advantages:
[0023] 1. The electrode head of the second electrode is made of memory metal wire. The electrode head has a certain rigidity and can undergo elastic deformation. The filamentous structure can effectively reduce the size of the plasma electrode, making the plasma electrode smaller and convenient for entering the narrow cartilage tissue gap. In addition, the electrode head can be easily squeezed and bent, and its angle and trajectory can be freely adjusted. It is not along a fixed route, which can fit the pathological tissue structure well and better treat the lesion.
[0024] 2. The plasma electrode adopts a retractable structure. The second electrode can slide back and forth along the first electrode, thereby changing the extended length of the electrode head. As the extended length of the electrode head changes, the two sides of the electrode head expand or contract, that is, the width of the effective working surface surrounded by the electrode head increases or decreases, which can grind cartilage tissue over a large area or finely. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. As shown in the drawings, the above and other purposes, features and advantages of the utility model will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled according to the actual size, and the focus is on showing the main purpose of the utility model.
[0026] Figure 1 The structure of the plasma electrode provided by the embodiment of the utility model is shown in FIG. Figure 1 ;
[0027] Figure 2 The structure of the plasma electrode provided by the embodiment of the utility model is shown in FIG. Figure 2 ;
[0028] Figure 3 for Figure 1 A schematic diagram of the internal structure of the M part after partial enlargement;
[0029] Figure 4 for Figure 2 A schematic diagram of the internal structure of the N part after partial enlargement;
[0030] Figure 5 Schematic diagram of the front end partial structure of the plasma electrode provided in the embodiment of the utility model Figure 1 ;
[0031] Figure 6 Schematic diagram of the front end local structure of the plasma electrode provided in the embodiment of the utility model Figure 2 ;
[0032] Figure 7 A partial cross-sectional view of the rear half of a plasma electrode provided in an embodiment of the utility model;
[0033] Figure 8 A schematic diagram of the usage status of the plasma electrode provided in an embodiment of the utility model.
[0034] Icons: 10-plasma electrode; 110-first electrode; 111-second electrode; 112-first insulating layer; 113-second insulating layer; 114-third insulating layer; 115-electrode head; 116-electrode wire; 117-effective working surface; 120-handle; 121-push button; 122-scale; 123-suction tube; 124-insulating sleeve. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0036] 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 present invention to be protected, 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.
[0037] 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.
[0038] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.
[0039] Please refer to Figure 1 , Figure 2 As shown, an embodiment of the utility model provides a plasma electrode 10, which can be used for grinding cartilage tissue. Generally speaking, the plasma electrode 10 needs to be used in conjunction with a host device and an endoscope.
[0040] First of all, it should be noted that the "front" and "back" provided in this embodiment are defined based on the positional relationship with the lesion site, that is, the "front" is close to the lesion site and the "back" is far from the lesion site.
[0041] The plasma electrode 10 is mainly composed of an electrode assembly and a handle assembly, and the rear end of the electrode assembly is fixed to the handle assembly.
[0042] Please combine Figure 3-Figure 6 As shown, the electrode assembly includes a first electrode 110 and a second electrode 111 , wherein the second electrode 111 is disposed inside the first electrode 110 and the two are insulated.
[0043] The first electrode 110 is tubular, for example, a round tube, a square tube, an irregular tube, etc., and is hollow inside. Taking a round tube as an example, the inner diameter of the first electrode 110 is 0.3-6 mm, preferably 2.0 mm, and the outer diameter D2 is 0.6-9.0 mm, preferably 3.0 mm. The first electrode 110 can be made of a conductive metal material, or only the front end can be made of a metal material and the rest can be made of a non-conductive material.
[0044] If the first electrode 110 is made of metal material as a whole, an insulating layer needs to be provided on both the inner and outer sides of the first electrode 110. Specifically, a first insulating layer 112 is provided on the inner side of the first electrode 110, and a second insulating layer 113 is provided on the outer side of the first electrode 110. Moreover, the front end of the first insulating layer 112 exceeds the first electrode 110 by a certain distance, and the front end of the first electrode 110 exceeds the second insulating layer 113 by a certain distance, so that the front end of the first electrode 110 is exposed, and the exposed length can be adjusted as needed. In some embodiments, the rear end of the first insulating layer 112 exceeds the first electrode 110 by a certain distance, and the rear end of the first electrode 110 exceeds the second insulating layer 113 by a certain distance, so that the rear end of the first electrode 110 is also exposed and electrically connected to the cable.
[0045] The second electrode 111 can slide in the front-to-back direction in the first electrode 110, and the front end of the second electrode 111 can extend from the front end of the first electrode 110. The second electrode 111 is insulated from the first electrode 110 by the first insulating layer 112, and the second electrode 111 may or may not be in contact with the inner surface of the first insulating layer 112.
[0046] The second electrode 111 includes an electrode head 115 and two electrode wires 116. The two electrode wires 116 are arranged side by side in the first electrode 110. The electrode head 115 is respectively connected to the two electrode wires 116 and is electrically conductive. The rear end of at least one electrode wire 116 can be electrically conductive with the cable.
[0047] The electrode head 115 is C-shaped. Here, "C-shaped" means that one end of the electrode head 115 is open. Its specific shape is not limited, for example, it can be a circular arc, an elliptical arc, a square with one side open, etc. The electrode head 115 has two ends, and the two ends are connected to the electrode wire 116 respectively.
[0048] The electrode head 115 is made of memory metal wire, which has a certain rigidity, and because it is a wire-like structure, the diameter D1 of the electrode head 115 is between 1-6 mm, preferably 2 mm or 3 mm, and its diameter and size are small, and it is easy to deform. When squeezed, it can be elastically deformed, thereby changing the bending direction, bending angle and shape of the electrode head 115. When the external force disappears, the electrode head 115 can return to its original state.
[0049] The electrode head 115 forms an effective working surface 117. The electrode head 115 can extend from the front end of the first electrode 110, and as the second electrode 111 slides back and forth in the first electrode 110, the extension length of the electrode head 115 changes, so that the electrode head 115 has a first state and a second state.
[0050] When the electrode head 115 is in the first state, the electrode head 115 extends forward and the two sides expand outward, that is, the overall width of the electrode head 115 gradually increases. Figure 6 For example, the electrode wire on the upper side of the electrode head 115 is stretched upward, and the electrode wire on the lower side is stretched downward, becoming the shape of the outer dotted line. The electrode head 115 is stretched like a balloon, and the width of the effective working surface 117 gradually increases, and the area of the effective working surface 117 increases, so that a large area can be worked.
[0051] When the electrode head 115 is in the second state, the electrode head 115 shrinks backward and the two sides are squeezed close together, that is, the overall width of the electrode head 115 gradually decreases. Figure 6 For example, the electrode wire on the upper side of the electrode head 115 is stretched downward, and the electrode wire on the lower side is stretched upward to become the shape of the inner dotted line, and the width of the effective working surface 117 is gradually reduced, so that a certain diseased tissue can be finely treated.
[0052] The maximum width of the electrode head 115 can be greater than the width of the first insulating layer 112, so that when the second electrode 111 moves forward and backward, the first insulating layer 112 can squeeze the electrode head 115, so that the two sides of the electrode head 115 can be expanded or retracted. Of course, in other embodiments, the two sides of the electrode head 115 can also be expanded or retracted through other structures.
[0053] The electrode wire 116 is in the shape of a wire, and the diameter of the electrode wire 116 is between 1-6 mm, preferably 2 mm or 3 mm. It is small in size and occupies a small area, which can make more space in the first insulating layer 112 free, and reserve space for adding other functions. The outer side of the electrode wire 116 is coated with a third insulating layer 114, and the rear end of the electrode wire 116 can be electrically conductive with the cable. Of course, in other embodiments, the two electrode wires 116 can also be replaced by other structures.
[0054] In some embodiments, the electrode head 115 forms an effective working surface 117, and the electrode head 115 is pre-bent toward one side of the effective working surface 117, and the pre-bending angle of the electrode head 115 is ∠A, wherein 0°<∠A≤90°, preferably 45°. When the electrode head 115 is pressed, the bending angle or bending direction can be changed, that is, the electrode head 115 can be folded up and down, and the folding angle ∠B≤180°
[0055] The rear end of the first electrode 110 is connected to the handle 120. In this embodiment, please Figure 7As shown, an insulating sleeve 124 is provided on the handle 120, and the rear end of the first electrode 110 is inserted into the insulating sleeve 124. Of course, a second insulating layer 113 may be provided between the first electrode 110 and the insulating sleeve 124, and the second electrode 111 may pass through the insulating sleeve 124 from the middle. The distance that the rear end of the first electrode 110 is inserted into the insulating sleeve 124 is 1-20 mm, preferably 8 mm. The rear end of the first electrode 110 may be connected to the insulating sleeve 124, and the insulating sleeve 124 may be connected to the suction tube 123, and the suction tube 123 is used to absorb waste liquid or tissue debris through the first electrode 110.
[0056] The handle 120 may be provided with a push button 121, which is connected to the rear end of the second electrode 111 and is exposed. The push button 121 can push the second electrode 111 to move forward and backward. The travel L of the push button 121 is ≤ 25 mm, preferably 15 mm.
[0057] In addition, a scale 122 may be provided on the handle 120, the scale 122 is adjacent to the push button 121, and the scale 122 cooperates with the push button 121 to display the extension length of the electrode head 115. The number of scales 122 is not limited, for example, the number of scales 122 is ≤ 6, preferably 4.
[0058] The method of using the plasma electrode 10 for cartilage tissue polishing provided in this embodiment is as follows:
[0059] Connecting the plasma electrode 10 to the corresponding host device;
[0060] The endoscope and the plasma electrode 10 are respectively introduced into the joint from different positions, and the endoscope provides illumination;
[0061] Please combine Figure 8 As shown, after the plasma electrode 10 enters the joint gap, the electrode head 115 of the second electrode 111 can be inserted into the gap. Figure 8 The shaded part in the figure represents the diseased cartilage tissue. Since the electrode head 115 adopts a memory metal wire structure, it can enter various narrow gaps, and under the squeezing of the joint gap structure, the electrode head 115 can be adjusted to a shape that adapts to the structure;
[0062] When the diseased cartilage tissue is relatively inner, it is only necessary to push the push button 121 on the handle 120 to move the second electrode 111 forward relative to the first electrode 110, and the electrode head 115 can be delivered to the designated position;
[0063] When you need to process the other end of the joint sphere, please combine Figure 5As shown, it is only necessary to withdraw the electrode head 115 from the current position, and place it near the diseased cartilage tissue, and gently squeeze the electrode head 115 in the reverse direction, so as to adjust the bending direction or bending angle of the electrode head 115. It is not necessary to completely withdraw the plasma electrode 10 and then re-enter it, which is very convenient to use.
[0064] When a large area of diseased cartilage tissue needs to be treated, just push the push button 121 forward. Figure 6 As shown, the electrode head 115 will expand to both sides and the front end like a balloon, and the effective working surface 117 after expansion is the outer dotted line range, thereby expanding the area of the effective working surface 117 of the electrode head 115, so that a large area operation can be performed;
[0065] When a diseased tissue needs to be carefully treated, just push the push button 121 backwards. Figure 6 As shown, the electrode head 115 will shrink like a balloon, with both ends and the front end shrinking inward, and the effective working surface 117 after shrinkage is within the inner dotted line range, thereby reducing the area of the effective working surface 117 of the electrode head 115, so that the diseased cartilage tissue can be treated in a small range, achieving refined operation;
[0066] When suction is needed, it is only necessary to connect the suction tube 123 to the suction device and turn on the suction device. Since the suction port is the front end opening of the first insulating layer 112, larger tissue debris can be sucked out, and the suction effect is better.
[0067] The above steps can be increased, decreased, modified, or the order can be adjusted as needed.
[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A plasma electrode for polishing cartilage tissue, characterized in that: The invention comprises a first electrode and a second electrode, wherein the first electrode is tubular, the second electrode is slidably inserted into the first electrode and the two are insulated, the second electrode comprises an electrode head made of a memory metal wire, the electrode head is C-shaped and extends from the front end of the first electrode; the electrode head has a first state in which the electrode head extends forward and both sides are spread outward, and a second state in which the electrode head contracts backward and both sides are squeezed close together.
2. The plasma electrode for cartilage tissue polishing according to claim 1, characterized in that: The plasma electrode further includes a first insulating layer and a second insulating layer, wherein the first insulating layer is located inside the first electrode and the second insulating layer is located outside the first electrode, and the front end of the first electrode is exposed.
3. The plasma electrode for cartilage tissue polishing according to claim 2, characterized in that: The maximum width of the electrode head is greater than the width of the first insulating layer.
4. The plasma electrode for cartilage tissue polishing according to claim 1, characterized in that: The second electrode further comprises two electrode wires, the electrode wires are inserted into the first electrode, and two ends of the electrode head are respectively connected to the two electrode wires.
5. The plasma electrode for cartilage tissue polishing according to claim 4, characterized in that: The outer side of the electrode wire is covered with a third insulating layer.
6. The plasma electrode for cartilage tissue polishing according to claim 1, characterized in that: The electrode heads form an effective working surface, and one side of the electrode heads facing the effective working surface is pre-bent.
7. The plasma electrode for cartilage tissue polishing according to claim 1, characterized in that: The plasma electrode further comprises a handle, the rear end of the first electrode is connected to the handle, a push button is arranged on the handle, the push button is connected to the rear end of the second electrode and is used to push the second electrode to move forward and backward.
8. The plasma electrode for cartilage tissue polishing according to claim 7, characterized in that: The handle is provided with a scale, which is adjacent to the push button and is used to display the extended length of the electrode head.
9. The plasma electrode for cartilage tissue polishing according to claim 7, characterized in that: The plasma electrode further includes a suction tube, and the suction tube is communicated with the first electrode.
10. The plasma electrode for cartilage tissue polishing according to claim 9, characterized in that: The handle is provided with an insulating sleeve, the rear end of the first electrode is inserted into the insulating sleeve, and the suction tube and the first electrode are connected through the insulating sleeve.