Anti-adhesion plasma cutter head and plasma cutter

Abstract

The anti-adhesion plasma cutter head comprises a cutter bar, a tungsten piece arranged at the end of the cutter bar, a ceramic block arranged on the side, facing the interior of the cutter bar, of the tungsten piece and an electrode needle arranged on the side, away from the ceramic block, of the tungsten piece, and a plurality of first through holes are formed in the tungsten piece. A plurality of second through holes are formed in the ceramic block, one end of each second through hole is communicated with the corresponding first through hole, and the other end of each second through hole is communicated with an external air supply device. Through the arrangement of the first through hole and the second through hole, when an external gas supply device blows out gas, the jetted gas flows through the second through hole and then is jetted out of the first through hole, the jetted gas enables a gas layer to be formed between the tungsten sheet and the human tissue, isolation between the tungsten sheet and the human tissue is effectively achieved, and the tungsten sheet is prevented from being damaged. And the possibility of adhesion between the tungsten sheet and human tissues is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an anti-adhesion plasma blade tip and a plasma blade. Background Technology

[0002] In modern surgical procedures, various surgical instruments are commonly used to cut human tissue. These include ordinary scalpels, plasma scalpels, argon plasma coagulation devices, ultrasonic emulsification aspiration scalpels, great saphenous vein rotary scalpels, sapphire scalpels, and LEEP scalpels.

[0003] Among them, the plasma scalpel, a commonly used surgical instrument, works by employing bipolar technology. It utilizes a radio frequency electric field to create a thin plasma layer around the scalpel tip. Ions in this layer are accelerated by the electric field, transferring energy to the tissue and breaking molecular bonds, causing cells to disintegrate at the molecular level, thus achieving the purpose of tissue cutting. Simultaneously, the principle of pulsed vaporization generates a cooling effect during energy interruptions, reducing thermal damage and preventing tissue and instrument adhesion.

[0004] However, in existing plasma scalpels, the blade inevitably comes into contact with human tissue, especially the large tungsten blade on the blade. When the tungsten blade comes into contact with human tissue, the tissue is prone to sticking to the blade. Once the tungsten blade sticks to human tissue, it can easily cause harm to the human body. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide an anti-adhesion plasma blade and plasma blade, which effectively prevents human tissue from adhering to the tungsten sheet.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An anti-adhesion plasma cutter head includes a cutter bar, a tungsten sheet disposed at the end of the cutter bar, a ceramic block disposed on the side of the tungsten sheet facing inwards from the cutter bar, and an electrode needle disposed on the side of the tungsten sheet away from the ceramic block. The tungsten sheet has a plurality of first through holes; the ceramic block has a plurality of second through holes, one end of each second through hole is connected to a corresponding first through hole, and the other end of each second through hole is connected to an external gas supply device.

[0008] Furthermore, an anti-adhesion layer is provided on the side of the tungsten sheet away from the ceramic block, and the anti-adhesion layer is provided with a plurality of third through holes, each of the first through holes being connected to the corresponding third through holes.

[0009] Furthermore, the axes of the first through hole, the second through hole, and the third through hole are all in the same straight line direction.

[0010] Furthermore, each of the second through holes is connected to the external air supply device by an arc-shaped pipe and a straight pipe. One end of the arc-shaped pipe is connected to the second through hole, and the other end of the arc-shaped pipe is connected to the straight pipe. The straight pipe is connected to the external air supply device.

[0011] Furthermore, the diameter of the first through hole facing the third through hole is the same as the diameter of the third through hole, and the diameter of the third through hole is smaller than the diameter of the second through hole.

[0012] Furthermore, the diameter of the first through hole facing the end of the second through hole is the same as the diameter of the second through hole, and the inner wall of the first through hole is a conical surface.

[0013] Furthermore, the diameter of the third through hole is 300 to 500 micrometers, and the diameter of the second through hole is 800 to 1000 micrometers.

[0014] Furthermore, the thickness of the anti-adhesion layer is 60 to 100 micrometers.

[0015] Furthermore, the anti-adhesion layer is an aluminum oxide layer or a silicon dioxide layer.

[0016] A plasma scalpel includes a handle portion and an anti-adhesion plasma scalpel head as described above, wherein the handle portion is connected to the anti-adhesion plasma scalpel head, and an external gas supply device is disposed within the handle portion.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a plurality of first through holes on the tungsten sheet and a plurality of second through holes on the ceramic block, one end of each second through hole is connected to a corresponding first through hole, and the other end of each second through hole is connected to an external air supply device. When the external air supply device blows gas, the blown gas flows through the second through holes and then exits from the first through holes. The ejected gas forms an air layer between the tungsten sheet and human tissue, effectively isolating the tungsten sheet from human tissue and significantly reducing the possibility of adhesion between the tungsten sheet and human tissue. Attached Figure Description

[0018] Figure 1 This is a front view of the plasma knife of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0020] Figure 3 yes Figure 2 Cross-sectional view of plane B-B;

[0021] Figure 4 yes Figure 3Enlarged diagram of section C.

[0022] In the picture:

[0023] 1- Tool holder; 2- Tungsten sheet; 3- Ceramic block; 4- Electrode needle; 5- First through hole; 6- Second through hole; 7- Anti-adhesion layer; 8- Third through hole; 9- Arc-shaped tube; 10- Straight tube; 11- Handle part. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] This utility model is an improvement on plasma cutters, more specifically, an improvement on the plasma cutter tip. For example... Figures 1 to 4As shown, existing plasma scalpels include a plasma scalpel head and a handle 11, with the handle 11 connected to the plasma scalpel head. The existing plasma scalpel head includes a shank 1, a tungsten plate 2 at the end of the shank 1, a ceramic block 3 on the side of the tungsten plate 2 facing inwards from the shank 1, and an electrode needle 4 on the side of the tungsten plate 2 away from the ceramic block 3. The handle 11 contains an electronic control unit, which is electrically connected to the electrode needle 4. Operating the electronic control unit supplies power to the electrode needle 4, making the electrode needle 4 the positive electrode. The shank 1, made of metal, forms the negative electrode. The plasma excited by the current flowing between the electrode needle 4 and the shank 1 can be used for cutting human tissue. Typically, several first through holes 5 are provided on the tungsten plate 2, which facilitates plasma excitation by the electrode needle 4. Unlike existing technologies, the plasma scalpel of this invention includes a handle 11 and an anti-adhesion plasma scalpel head, which is connected to the handle 11. This invention focuses on the improvement of the anti-adhesion plasma cutting head. The ceramic block 3 in the anti-adhesion plasma cutting head has several second through holes 6. One end of each second through hole 6 is connected to a corresponding first through hole 5, and the other end of each second through hole 6 is connected to an external air supply device, which is located inside the handle 11. Therefore, when the external air supply device blows gas, the gas flows through the second through holes 6 and then exits from the first through holes 5. The ejected gas forms an air layer between the tungsten sheet 2 and the human tissue, effectively isolating the tungsten sheet 2 from the human tissue and significantly reducing the possibility of adhesion between the tungsten sheet 2 and the human tissue.

[0028] In the anti-adhesion plasma cutting head and plasma cutter of this utility model, many technical features such as the shape of the first through hole 5 and the position of the second through hole 6 have multiple implementations. Below, for each of the many technical features such as the shape of the first through hole 5, one implementation is selected for detailed description, and the embodiment in which this implementation is located is referred to as this embodiment. Other implementations of the many features such as the first through hole 5 are referred to as other embodiments, which are briefly described below.

[0029] In this embodiment, as Figure 3 and Figure 4As shown, an anti-adhesion layer 7 is provided on the side of the tungsten sheet 2 away from the ceramic block 3. The anti-adhesion layer 7 has several third through holes 8, and each first through hole 5 is connected to its corresponding third through hole 8. Gas blown from the external gas supply device ultimately exits through the third through holes 8. This invention, through the provision of the anti-adhesion layer 7 and the third through holes 8, allows gas blown from the external gas supply device to form an air layer between the tungsten sheet 2 and human tissue. Furthermore, when the external gas supply device malfunctions, the anti-adhesion layer 7 can also reduce the possibility of adhesion between the tungsten sheet 2 and human tissue. In other embodiments, several cylindrical protrusions can also be provided on the surface of the tungsten sheet 2 to reduce the contact area between the surface of the tungsten sheet 2 and human tissue, thereby reducing the possibility of adhesion between the tungsten sheet 2 and human tissue.

[0030] In this embodiment, as Figure 3 and Figure 4 As shown, the anti-adhesion layer 7 is an alumina layer or a silicon dioxide layer. Both alumina and silicon dioxide have high hardness, high thermal stability, and corrosion resistance, and can form a uniform, smooth, and wear-resistant coating on the surface of the tungsten sheet 2, reducing adhesion and friction, and have good biocompatibility. In other embodiments, the anti-adhesion layer 7 may also be a polytetrafluoroethylene layer or a sodium hyaluronate layer.

[0031] In this embodiment, as Figure 3 and Figure 4 As shown, the thickness of the anti-adhesion layer 7 is 60 to 100 micrometers. If the anti-adhesion layer 7 is too thin, it will not provide a good anti-adhesion effect, while if the anti-adhesion layer 7 is too thick, it will cause cracking and be difficult to manufacture. In other embodiments, the thickness of the anti-adhesion layer 7 may also be slightly greater than 100 micrometers.

[0032] In this embodiment, as Figure 3 and Figure 4 As shown, in the interconnected first through hole 5, second through hole 6, and third through hole 8, the axes of the first through hole 5, the second through hole 6, and the third through hole 8 are all in the same straight line direction. Therefore, when the gas blown out by the external gas supply device enters the third through hole 8, it flows in a straight line until it is ejected from the second through hole 6, resulting in less loss during the gas flow process and reducing the energy consumption of the external gas supply device. In other embodiments, in the interconnected first through hole 5, second through hole 6, and third through hole 8, the axes of the first through hole 5 and the third through hole 8 can also be inclined to each other. The axes of the first through hole 5 and the second through hole 6 are in the same straight line direction, and the axes of each first through hole 5 are all inclined to each other. The first through holes 5 are arranged in a ring, so that the gas ejected from the second through hole 6 is a spiral airflow, reducing the impact force on human tissue.

[0033] In this embodiment, as Figure 3As shown, each of the second through holes 6 is connected to an arc-shaped pipe 9 and a straight pipe 10 via an external gas supply device. One end of the arc-shaped pipe 9 is connected to the second through hole 6, and the other end is connected to the straight pipe 10. The straight pipe 10 is connected to the external gas supply device, and the axis of the straight pipe 10 is perpendicular to the axis of the second through hole 6. Therefore, the arc-shaped pipe 9 in this invention guides the gas blown out by the external gas supply device, facilitating the gas to enter the second through hole 6. In other embodiments, the external gas supply device can be located outside the plasma blade. A vent hole is provided on the outer wall of the blade 1 on the side of the ceramic block 3 away from the first through hole. The axis of the vent hole is in the same straight line direction as the axis of the second through hole 6, and the external gas supply device is connected to the vent hole.

[0034] In this embodiment, as Figure 3 and Figure 4 As shown, the diameter of the end of the first through hole 5 facing the third through hole 8 is the same as the diameter of the third through hole 8, and the diameter of the third through hole 8 is smaller than the diameter of the second through hole 6. Therefore, when the airflow passes through the first through hole 5, the airflow is accelerated due to the reduced diameter. In other embodiments, to reduce manufacturing costs, the diameters of the first through hole 5 and the second through hole 6 can also be set to be the same.

[0035] In this embodiment, as Figure 3 and Figure 4 As shown, the diameter of the end of the first through hole 5 facing the second through hole 6 is the same as the diameter of the second through hole 6, and the inner wall of the first through hole 5 is a conical surface. This invention, through the setting of the conical surface, achieves a guiding effect when gas flows through the first through hole 5. In other embodiments, the conical surface can also be set as a spiral surface, causing the gas to form a spiral airflow, reducing the impact force on human tissue.

[0036] In this embodiment, as Figure 3 and Figure 4 As shown, the diameter of the third through hole 8 is 300 to 500 micrometers, and the diameter of the second through hole 6 is 800 to 1000 micrometers. Within the numerical ranges of the second through hole 6 and the diameter of the third through hole 8 in this embodiment, it is possible to ensure that the ejected gas flow forms a gas layer while simultaneously preventing the plasma cutting head from sticking and facilitating its manufacturing. In other embodiments, without considering the difficulty of the manufacturing process, the diameter of the third through hole 8 can be less than 300 micrometers.

[0037] In summary, this invention, through the provision of a second through hole 6 connected to the first through hole 5 and the external air supply device, isolates the tungsten sheet 2 from the human tissue by the gas ejected from the first through hole 5, significantly reducing the possibility of adhesion between the tungsten sheet 2 and the human tissue. Furthermore, the anti-adhesion layer 7 further reduces the probability of adhesion between the tungsten sheet 2 and the human tissue in the event of a malfunction of the external air supply device. By ensuring that the axes of the first through hole 5, the second through hole 6, and the third through hole 8 are all aligned in a straight line, the energy consumption of the external air supply device is reduced. The arc-shaped tube 9 guides the flow of gas ejected from the external air supply device. The smaller diameter of the third through hole 8 compared to the second through hole 6 accelerates the airflow as it passes through the first through hole 5. The conical surface further enhances the guiding effect.

[0038] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An anti-adhesion plasma cutter head, comprising a cutter bar (1), a tungsten sheet (2) disposed at the end of the cutter bar (1), a ceramic block (3) disposed on the side of the tungsten sheet (2) facing inward toward the cutter bar (1), and an electrode needle (4) disposed on the side of the tungsten sheet (2) away from the ceramic block (3), wherein the tungsten sheet (2) is provided with a plurality of first through holes (5), characterized in that, The ceramic block (3) is provided with a plurality of second through holes (6), one end of each second through hole (6) is connected to the corresponding first through hole (5), and the other end of each second through hole (6) is connected to an external gas supply device.

2. The anti-adhesion plasma cutting tip according to claim 1, characterized in that, The tungsten sheet (2) has an anti-adhesion layer (7) on the side away from the ceramic block (3). The anti-adhesion layer (7) has a plurality of third through holes (8), and each of the first through holes (5) is connected to the corresponding third through hole (8).

3. The anti-adhesion plasma cutting tip according to claim 2, characterized in that, The axes of the first through hole (5), the second through hole (6), and the third through hole (8) are all in the same straight line direction.

4. The anti-adhesion plasma cutting tip according to claim 2, characterized in that, Each of the second through holes (6) is connected to the external air supply device by an arc-shaped pipe (9) and a straight pipe (10). One end of the arc-shaped pipe (9) is connected to the second through hole (6), and the other end of the arc-shaped pipe (9) is connected to the straight pipe (10). The straight pipe (10) is connected to the external air supply device.

5. The anti-adhesion plasma cutting tip according to claim 2, characterized in that, The diameter of the first through hole (5) facing the third through hole (8) is the same as the diameter of the third through hole (8), and the diameter of the third through hole (8) is smaller than the diameter of the second through hole (6).

6. The anti-adhesion plasma cutting tip according to claim 5, characterized in that, The diameter of the first through hole (5) facing the second through hole (6) is the same as the diameter of the second through hole (6), and the inner wall of the first through hole (5) is a conical surface.

7. The anti-adhesion plasma cutting tip according to claim 5, characterized in that, The diameter of the third through hole (8) is 300 to 500 micrometers, and the diameter of the second through hole (6) is 800 to 1000 micrometers.

8. The anti-adhesion plasma cutting tip according to claim 2, characterized in that, The thickness of the anti-adhesion layer (7) is 60 to 100 micrometers.

9. The anti-adhesion plasma cutting tip according to claim 2, characterized in that, The anti-adhesion layer (7) is an aluminum oxide layer or a silicon dioxide layer.

10. A plasma knife, characterized in that, It includes a handle (11) and an anti-adhesion plasma cutter head as described in any one of claims 1 to 9, wherein the handle (11) is connected to the anti-adhesion plasma cutter head, and the external gas supply device is disposed inside the handle (11).

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