Plasma operation electrode and adenoid excision equipment

Abstract

According to the plasma operation electrode and the adenoid excision device, in the adenoid excision process, due to the fact that the conductive section is bent relative to the connecting section, the electrode piece arranged on the conductive section can stretch into the oral cavity and face the adenoid easily and conveniently by holding the handle, and clinical operation of medical staff is facilitated. Moreover, the electrode piece protrudes out of the outer side wall of the conductive section in the direction opposite to the bending direction, so that the electrode piece can be tightly attached to the adenoid body, the plasma host is used for providing current for the electrode piece and the conductive section, and the electrode piece and the conductive section are conducted to form a loop; therefore, operations of excision, ablation, hemostasis and the like are performed on soft tissues in a focus area of the adenoid body, the excision efficiency is high, and the excision effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a plasma surgical electrode and adenoid removal equipment. Background Art

[0002] With the development of modern medical technology, plasma surgical tools are increasingly being used in various soft tissue surgical treatments. When using plasma surgical tools to perform adenoidectomy, the blade needs to be inserted into the oral cavity until it contacts the adenoids to perform ionized removal of the adenoids. However, during the adenoidectomy process, the traditional plasma surgical tools have poor removal effects because the blade cannot fit tightly against the adenoids. Utility Model Content

[0003] Based on this, it is necessary to provide a plasma surgical electrode and adenoids removal device to address the problem that the blade and the adenoids cannot fit tightly, resulting in poor removal effect.

[0004] The technical solution is as follows:

[0005] In one aspect, a plasma surgical electrode is provided, comprising:

[0006] handle;

[0007] A knife bar assembly, the knife bar assembly comprising a connecting segment and a conductive segment deflected toward a first direction relative to the connecting segment, one end of the connecting segment is connected to the handle, the other end of the connecting segment is connected to the conductive segment, and the conductive segment serves as one polarity; and

[0008] The tool head assembly includes an electrode member, which is arranged at one end of the conductive segment away from the connecting segment, and the electrode member is arranged to protrude from the outer side wall of the conductive segment in the opposite direction of the first direction. The electrode member is insulated from the conductive segment and serves as the other polarity.

[0009] The technical solution is further described below:

[0010] In one embodiment, a mounting notch is provided at one end of the conductive segment away from the connecting segment, and the cutter head assembly further comprises an insulating mounting seat arranged at the mounting notch; the electrode member is configured to be arc-shaped, and the insulating mounting seat is provided with an arc-shaped mounting surface arranged in the opposite direction to the first direction, the arc-shaped mounting surface protrudes from the outer side wall of the conductive segment, and the electrode member is correspondingly arranged on the arc-shaped mounting surface.

[0011] In one embodiment, the electrode member is provided with a liquid outlet and a suction port spaced apart from each other, and the insulating mounting seat is provided with a liquid outlet channel connected to the liquid outlet, a suction channel connected to the suction port, and a lead channel extending to the electrode member.

[0012] In one embodiment, the plasma surgical electrode also includes an infusion pipeline, a suction pipeline and a lead wire, and the infusion pipeline, the suction pipeline and the lead wire are all passed through the knife rod assembly, and the infusion pipeline is connected to the liquid outlet, the suction pipeline is connected to the suction port, and the lead wire is electrically connected to the electrode component.

[0013] In one embodiment, the liquid outlet is arranged away from the connecting section relative to the suction port.

[0014] In one of the embodiments, the insulating mounting seat includes a seat body plugged into the mounting notch and a boss extending in the opposite direction to the first direction, and the boss is provided with the arc-shaped mounting surface.

[0015] In one embodiment, the mounting notch has a side opening opened at a circumferential side wall of the conductive segment and an end opening opened at an end of the conductive segment away from the connecting segment.

[0016] In one embodiment, the knife bar assembly further includes an arc segment, the arc segment is bent toward the first direction relative to the connecting segment, and the connecting segment is connected to the conductive segment through the arc segment; or,

[0017] The connecting segment and the conductive segment are integrally formed, and the conductive segment is bent toward the first direction relative to the connecting segment.

[0018] In one embodiment, the plasma surgical electrode further includes an insulating sleeve, which is sleeved on an outer side wall of the knife rod assembly and extends from the handle to the electrode member.

[0019] On the other hand, an adenoidectomy device is provided, comprising a plasma host and the plasma surgical electrode, wherein the plasma host is electrically connected to the conductive segment and the electrode member.

[0020] In the plasma surgical electrode and adenoidectomy device of the above embodiment, during the adenoid removal process, since the conductive segment is bent relative to the connecting segment, the electrode member disposed on the conductive segment can be simply and conveniently extended into the oral cavity and toward the adenoids by holding the handle, which is convenient for clinical operation by medical staff. Moreover, since the electrode member is disposed to protrude from the outer wall of the conductive segment in the opposite direction of the bending direction, the electrode member can be closely attached to the adenoids, and the plasma host is used to provide current to the electrode member and the conductive segment, so that the electrode member and the conductive segment are connected to form a circuit, thereby performing operations such as removal, ablation and hemostasis of the soft tissue in the lesion area of ​​the adenoids, with high removal efficiency and good removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

[0023] Figure 1 A schematic diagram of the structure of an adenoidectomy device according to an embodiment;

[0024] Figure 2 A schematic structural diagram of an adenoidectomy device according to another embodiment;

[0025] Figure 3 for Figure 2 A cross-sectional view of an adenoidectomy device CC;

[0026] Figure 4 for Figure 1 A schematic diagram of the structure of a blade assembly of an adenoidectomy device;

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the insulating mounting base and conductive segment of the adenoidectomy device.

[0028] Description of reference numerals:

[0029] 10. Plasma surgical electrode; 100. Handle; 210. Knife rod assembly; 211. Connecting section; 212. Conductive section; 2121. Mounting notch; 21211. Side opening; 21212. End opening; 213. Arc section; 220. Knife head assembly; 221. Electrode member; 2211. Liquid outlet; 2212. Suction port; 222. Insulating mounting seat; 2221. Arc-shaped mounting surface; 2222. Seat body; 2223. Boss; 300. Insulating sleeve; 400. Infusion line; 500. Suction line; 600. Lead wire. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] like Figure 1 As shown, in one embodiment, an adenoid removal device is provided, including a plasma host (not shown) and a plasma surgical electrode 10. In this way, the plasma host is used to provide current to the plasma surgical electrode 10, so that the plasma surgical electrode 10 can ionize and remove the adenoids, and the plasma surgical electrode 10 can be closely fitted with the adenoids, with high removal efficiency and good removal effect.

[0032] It should be noted that the plasma host can be an existing component that can provide current to the plasma surgical electrode 10, and is not limited here. Figure 1 , Figure 3 , Figure 4 and Figure 5 In one embodiment, a plasma surgical electrode 10 is provided, including a handle 100 , a knife rod assembly 210 , and a knife head assembly 220 .

[0033] The handle 100 can be used as a gripping portion during use.

[0034] The knife bar assembly 210 may be in the form of a hollow cylinder or rod. Figure 1 As shown, specifically, the knife bar assembly 210 includes a connecting section 211 and a knife bar assembly 210 extending in a first direction (such as Figure 2The conductive segment 212 is deflected in the A direction (shown in FIG. 1 ), that is, the conductive segment 212 is arranged at an angle with the connecting segment 211. In addition, one end of the connecting segment 211 is connected to the handle 100 by plugging or snapping, and the other end of the connecting segment 211 is connected to the conductive segment 212. In addition, the conductive segment 212 is electrically connected to the plasma mainframe, so that the conductive segment 212 serves as one polarity.

[0035] In one embodiment, the connecting segment 211 and the conductive segment 212 are integrally formed, and the conductive segment 212 is bent toward the first direction relative to the connecting segment 211, saving processing costs. Of course, in other embodiments, the connecting segment 211 and the conductive segment 212 can also be formed separately and then assembled by screwing or plugging.

[0036] In one embodiment, the connecting section 211 is coaxially arranged with the handle 100 , so as to facilitate controlling the direction of the knife rod assembly 210 by holding the handle 100 .

[0037] like Figure 3 and Figure 4 As shown, the blade assembly 220 includes an electrode 221, which is disposed at one end of the conductive segment 212 away from the connecting segment 211. Thus, after the conductive segment 212 is inserted into the oral cavity, the electrode 221 is inserted into the oral cavity and can contact the adenoids. Figure 2 The electrode member 221 is disposed on the outer side wall of the protruding conductive segment 212 (as shown in the B direction). For example, when the conductive segment 212 is tilted downward relative to the connecting segment 211, the electrode member 221 is disposed along the outer side wall of the conductive segment 212 protruding upward. Moreover, the electrode member 221 is insulated from the conductive segment 212 to avoid a short circuit with the conductive segment 212. For example, the electrode member 221 and the conductive segment 212 are spaced apart and insulated from each other. At the same time, the electrode member 221 is electrically connected to the plasma host. The electrode member 221 is used as another polarity. For example, when the conductive segment 212 acts as a loop electrode in the ionization process, the electrode member 221 acts as an output electrode in the ionization process; when the conductive segment 212 acts as an output electrode in the ionization process, the electrode member 221 acts as a loop electrode in the ionization process.

[0038] The electrode element 221 may be in the form of a sheet or a block.

[0039] like Figure 2 As shown, in one embodiment, when the connecting segment 211 is in a horizontal state, the conductive segment 212 is arranged to be inclined downward relative to the connecting segment 211, and the angle between the conductive segment 212 and the connecting segment 211 (such as Figure 2The angle α shown in the figure can be flexibly adjusted or designed according to actual use needs. For example, the angle between the conductive segment 212 and the connecting segment 211 can be about 40°, so that after the conductive segment 212 is extended into the oral cavity, the electrode member 221 can be better and more closely fitted with the adenoids. Preferably, the angle between the conductive segment 212 and the connecting segment 211 can be adapted to the angle between the axial direction of the oral cavity and the axial direction of the adenoids.

[0040] In the plasma surgical electrode 10 of the above embodiment, during the adenoid removal process, since the conductive segment 212 is bent relative to the connecting segment 211, the electrode member 221 disposed on the conductive segment 212 can be simply and conveniently extended into the oral cavity and toward the adenoids by holding the handle 100, which is convenient for clinical operation by medical staff. Moreover, since the outer wall of the conductive segment 212 of the electrode member 221 protrudes in the opposite direction of the bending direction, the electrode member 221 can be closely attached to the adenoids, and the plasma host is used to provide current to the electrode member 221 and the conductive segment 212, so that the electrode member 221 and the conductive segment 212 are connected to form a circuit, thereby performing operations such as removal, ablation and hemostasis of the soft tissue in the lesion area of ​​the adenoids, with high removal efficiency and good removal effect.

[0041] like Figures 3 to 5 As shown, in one embodiment, a mounting notch 2121 is provided at one end of the conductive segment 212 away from the connecting segment 211. The blade assembly 220 also includes an insulating mounting seat 222 disposed in the mounting notch 2121, and the insulating mounting seat 222 can be made of insulating materials such as ceramics. In addition, the electrode member 221 is configured as an arc shape, such as an arc-shaped conductive metal sheet, and the insulating mounting seat 222 is provided with an arc-shaped mounting surface 2221 disposed in the opposite direction of the first direction, and the arc-shaped mounting surface 2221 protrudes from the outer wall of the conductive segment 212. The electrode member 221 is arranged on the arc-shaped mounting surface 2221 in the form of screw connection or plug connection so that the electrode member 221 protrudes from the outer wall of the conductive segment 212 and can fit closely with the adenoids. In this way, the electrode member 221 and the insulating mounting seat 222 are installed as a whole to become a modular component, and then the modular component can be installed at the mounting notch 2121, thereby improving the assembly efficiency. Moreover, the entire modular component can be disassembled for replacement, and the maintenance and repair efficiency is high.

[0042] Optionally, the contour of the arc-shaped mounting surface 2221 can match the circumferential contour of the conductive segment 212, so that the contour of the electrode member 221 matches the circumferential contour of the conductive segment 212, making the shape of the entire blade assembly 220 smoother and avoiding scratches on the adenoids.

[0043] Furthermore, the electrode member 221 is provided with a liquid outlet 2211 and a suction port 2212 which are spaced apart from each other, and the insulating mounting seat 222 is provided with a liquid outlet channel connected with the liquid outlet 2211 to transport the ionized liquid to the liquid outlet 2211 so that the conductive segment 212 and the electrode member 221 are connected to form a loop to ionize the ionized liquid to generate plasma to perform operations such as resection, ablation and hemostasis on the soft tissue in the lesion area of ​​the adenoids, a suction channel connected with the suction port 2212 to extract the waste liquid or the removed soft tissue, and a lead 600 channel extending to the electrode member 221 to guide the lead 600 to be electrically connected to the electrode member 221.

[0044] like Figures 2 to 4 As shown, further, the plasma surgical electrode also includes an infusion line 400, a suction line 500 and a lead 600. The infusion line 400, the suction line 500 and the lead 600 are all inserted into the knife bar assembly 210 for a hidden design, and the infusion line 400 is connected to the liquid outlet 2211 to transport the ionized liquid to the liquid outlet 2211, the suction line 500 is connected to the suction port 2212 to suck out the waste liquid or the removed soft tissue at the suction port 2212, and the lead 600 is electrically connected to the electrode component 221 to realize the electrical connection between the plasma host and the electrode component 221.

[0045] like Figure 4 As shown, in one embodiment, the liquid outlet 2211 is arranged away from the connecting section 211 relative to the suction port 2212. In this way, during the adenoid removal process, the electrode member 221 is closely attached to the adenoids so that the liquid outlet 2211 is located above the suction. When the ionized liquid flows out from the liquid outlet 2211, the ionized liquid can flow downward under the action of gravity and wrap the entire arc-shaped working surface of the electrode member 221, resulting in a better ionization effect.

[0046] like Figures 3 to 5 As shown, in a specific embodiment, the insulating mounting seat 222 includes a seat body 2222 plugged into the mounting notch 2121 and a boss 2223 extending in the opposite direction of the first direction, and the boss 2223 is provided with an arc-shaped mounting surface 2221. In this way, the seat body 2222 and the conductive segment 212 are stably and reliably assembled and connected, and the boss 2223 is used to install and fix the electrode member 221 and make the electrode member 221 protrude from the outer wall of the conductive segment 212 so as to fit closely with the adenoids.

[0047] like Figure 5As shown, in a specific embodiment, the mounting notch 2121 has a side opening 21211 opened on the circumferential side wall of the conductive segment 212 and an end opening 21212 opened on the end of the conductive segment 212 away from the connecting segment 211. In this way, the mounting seat can be inserted into the conductive segment 212 from the end opening 21212, and the boss 2223 is arranged to protrude from the side opening 21211 on the outer side wall of the conductive segment 212, which facilitates the assembly and connection between the insulating mounting seat 222 and the conductive segment 212. When the cutter head assembly 220 needs to be replaced, the mounting seat only needs to be pulled out from the end opening 21212, which is simple and convenient.

[0048] like Figure 1 As shown, in another feasible embodiment, the knife bar assembly 210 further includes an arc segment 213, the arc segment 213 is bent toward the first direction relative to the connecting segment 211, and the connecting segment 211 is connected to the conductive segment 212 via the arc segment 213. In this way, an arc transition is made between the connecting segment 211 and the conductive segment 212, so as to avoid scratching tissues after being inserted into the oral cavity.

[0049] Optionally, the connecting segment 211 and the conductive segment 212 are integrally formed and made of conductive material, so that the plasma host can be electrically connected to the connecting segment 211 to achieve electrical connection with the conductive segment 212. Of course, in other embodiments, the conductive segment 212 can also be electrically connected to the plasma host using conductive material alone.

[0050] like Figure 2 and Figure 3 As shown, in one embodiment, the plasma surgical electrode further includes an insulating sleeve 300, which is sleeved on the outer wall of the knife rod assembly, and the insulating sleeve 300 extends from the handle 100 to the electrode member 221. In this way, the insulating sleeve 300 can prevent ionization damage to other tissues in the oral cavity through the isolation effect.

[0051] It should be noted that "some body" or "some part" can be a part of the corresponding "component", that is, "some body" or "some part" can be integrally formed with the "other parts of the component"; it can also be an independent component that can be separated from the "other parts of the component", that is, "some body" or "some part" can be manufactured independently and then combined with the "other parts of the component" into a whole. The expression of the above-mentioned "some body" or "some part" in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as it contains the above-mentioned features and has the same function, it should be understood as an equivalent technical solution of this application.

[0052] It should be noted that the components included in the "unit", "assembly", "mechanism" and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as the above components are included and have the same functions, it should be understood that it is an equivalent technical solution of this application.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more related listed items.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. Further, when an element is considered to be "fixed transmission connected" to another element, the two can be fixed in a detachable connection manner or in a non-detachable connection, as long as power transmission can be achieved, such as socketing, snap-on, one-piece molding fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0058] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0059] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A plasma surgical electrode, characterized in that: include: handle; A knife bar assembly, the knife bar assembly comprising a connecting segment and a conductive segment deflected toward a first direction relative to the connecting segment, one end of the connecting segment is connected to the handle, the other end of the connecting segment is connected to the conductive segment, and the conductive segment serves as one polarity; and The tool head assembly includes an electrode member, which is arranged at one end of the conductive segment away from the connecting segment, and the electrode member is arranged to protrude from the outer side wall of the conductive segment in the opposite direction of the first direction. The electrode member is insulated from the conductive segment and serves as the other polarity.

2. The plasma surgical electrode according to claim 1, characterized in that: A mounting notch is provided at one end of the conductive segment away from the connecting segment, and the cutter head assembly also includes an insulating mounting seat arranged in the mounting notch; the electrode member is arranged in an arc shape, and the insulating mounting seat is provided with an arc-shaped mounting surface arranged in the opposite direction of the first direction, the arc-shaped mounting surface protrudes from the outer side wall of the conductive segment, and the electrode member is correspondingly arranged on the arc-shaped mounting surface.

3. The plasma surgical electrode according to claim 2, characterized in that: The electrode member is provided with a liquid outlet and a suction port which are spaced apart from each other, and the insulating mounting seat is provided with a liquid outlet channel connected with the liquid outlet, a suction channel connected with the suction port, and a lead channel extending to the electrode member.

4. The plasma surgical electrode according to claim 3, characterized in that: The plasma surgical electrode also includes an infusion pipeline, a suction pipeline and a lead wire. The infusion pipeline, the suction pipeline and the lead wire are all inserted into the knife rod assembly, and the infusion pipeline is connected to the liquid outlet, the suction pipeline is connected to the suction port, and the lead wire is electrically connected to the electrode component.

5. The plasma surgical electrode according to claim 3, characterized in that: The liquid outlet is arranged relative to the suction port and is far away from the connecting section.

6. The plasma surgical electrode according to claim 2, characterized in that: The insulating mounting seat comprises a seat body plugged into the mounting notch and a boss extending in the opposite direction of the first direction, wherein the boss is provided with the arc-shaped mounting surface.

7. The plasma surgical electrode according to claim 6, characterized in that: The installation notch has a side opening opened at a circumferential side wall of the conductive segment and an end opening opened at an end of the conductive segment away from the connecting segment.

8. The plasma surgical electrode according to any one of claims 1 to 7, characterized in that: The knife bar assembly further includes an arc segment, the arc segment is bent toward the first direction relative to the connecting segment, and the connecting segment is connected to the conductive segment through the arc segment; or, The connecting segment and the conductive segment are integrally formed, and the conductive segment is bent toward the first direction relative to the connecting segment.

9. The plasma surgical electrode according to any one of claims 1 to 7, characterized in that: The plasma surgical electrode further comprises an insulating sleeve, which is sleeved on the outer side wall of the knife rod assembly and extends from the handle to the electrode member.

10. An adenoidectomy device, characterized in that: It comprises a plasma host and the plasma surgical electrode as claimed in any one of claims 1 to 9, wherein the plasma host is electrically connected to the conductive segment and the electrode member respectively.

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