KR20230046477A - Detachable type bipolar electrode device - Google Patents

Abstract

The present invention relates to a detachable bipolar electrode for a medical use, and more specifically, to a detachable bipolar electrode for a medical use which configures a catheter which is inserted into a body in operation to be conveniently, detachably attached on a handpiece and enables recycling of parts, which are not inserted into the body and not necessarily discarded, such that unnecessary medical wastes are prevented from generating while preventing resources from wasting. In addition, the present invention makes users without expertise easily disassemble and assemble the electrode, thereby enabling quicker operations in an emergency as well as convenience in use. Moreover, the electrode can greatly improve convenience in maintenance.

Description

Medical removable bipolar electrode {Detachable type bipolar electrode device}

The present invention relates to a removable bipolar electrode for medical use, and more particularly, a catheter inserted into the body during a procedure can be easily attached or detached on a handpiece, and reuse of parts that are not inserted into the body and thus the need for disposal is not emerging. By enabling this, unnecessary medical waste is prevented and resources are wasted at the same time. Also, users without special expertise can easily disassemble and assemble electrodes, providing convenience in use as well as quicker medical treatment in an emergency. It relates to a removable bipolar electrode for medical use that enables a procedure and can significantly improve maintenance easiness.

In general, when a lesion occurs in a body organ, it is treated as a surgical operation or procedure. The procedure can be generally understood as a concept of a non-surgical method, and since such a non-surgical procedure has a lower risk compared to a surgical method, a lower incidence of surgical trauma, and can be performed relatively simply, a surgical operation must be performed. Except for indications that require surgery, non-surgical methods are often used.

As a representative example of a non-surgical treatment method, treatment using a high-frequency electrode (monopolar or bipolar electrode) may be exemplified.

Treatment using high-frequency electrodes involves inserting high-frequency electrodes into the body for various examinations, cauterization of lesions, drainage of retentions in body cavities or various organs, aspiration of perfusate for washing, measurement of cardiovascular dynamics or central venous pressure, contrast media, etc. It is a concept that includes procedures that perform drug injection, etc., and is widely used in various medical fields.

On the other hand, due to the nature of the structure that the instrument used for high-frequency surgery must conduct electricity while being inserted into fine human tissues such as blood vessels without difficulty, the structure for inserting into the body was not easily detachable, and reuse was not possible. In order to do this, it is necessary to wash even the fine parts to satisfy the reuse condition, but it is difficult to maintain the microstructure in a sterile state, so most of them have been used once and discarded.

Accordingly, there is a problem in that a lot of medical waste and waste of resources are generated unnecessarily.

Registered Patent No. 10-1227635

The present invention was created in order to solve these problems in view of the above-mentioned problems in the prior art, and the catheter inserted into the body during the procedure is configured to be easily detachable on the handpiece, and the need for disposal is not raised because it is not inserted into the body. By enabling the reuse of parts, it prevents unnecessary medical waste and waste of resources, and also enables users without special expertise to easily disassemble and assemble electrodes, providing convenience of use as well as urgent medical treatment. An object thereof is to provide a removable bipolar electrode for medical use, which enables a faster procedure under the circumstances and can significantly improve maintenance easiness.

The present invention is a means for achieving the above object, a hand piece; a catheter detachably coupled to one end of the handpiece and inserted into a lesion site in the body; and a high-frequency generator for activating a high-frequency region around the catheter by applying a high-frequency alternating current to the catheter coupled to the handpiece.

In addition, the catheter is made in the form of a tube of conductive material, and an energizing section is formed at one end and the other end by an insulator formed on the outer circumferential surface. shaft to be formed; a first active electrode coupled around the first passive electrode; and a fluid moving part coupled to the outside of the shaft and extending to the first active electrode across the inside of the shaft through the inlet.

In addition, the fluid moving unit is coupled to the outside of the shaft and the holder is formed with a branch port communicating with the inlet; and a fluid transfer pipe inserted into the shaft through the branch hole and connected to the first active electrode.

In addition, the conducting section formed at the other end of the shaft is composed of a second active electrode and a second passive electrode, and the first active electrode is electrically connected to the second active electrode through a wire wired inside the shaft. do.

In addition, the handpiece, the main body; and a holding unit built into the main body to detachably support the other end of the shaft, wherein the holding unit includes: a connector; an active electrode piece having one end coupled to the connector and the other end formed as a free end and supported in contact with the second active electrode to form a contact with the first active electrode; and a passive electrode piece having one end coupled to the connector and the other end formed in the form of a free end and contacted and supported by the second passive electrode to form a contact with the first passive electrode, wherein the high frequency generator is coupled to the connector. It is characterized in that a contact is formed between the active electrode piece and the passive electrode piece.

In addition, the active electrode piece and the passive electrode piece are disposed to face each other with the other end of the shaft interposed therebetween, and a holding ball is formed at the other end of each of the active electrode piece and the passive electrode piece, and the second active electrode and the second passive electrode piece are disposed to face each other. It is characterized in that the electrode is formed with a recessed holding groove in which the holding ball is hooked and supported.

The present invention prevents the unnecessary generation of medical waste by configuring a catheter inserted into the body during surgery to be detachable and detachable from the handpiece, and enabling the reuse of parts that are not inserted into the body and thus do not require disposal. At the same time, it prevents the waste of resources, and also allows users without special expertise to easily disassemble and assemble the electrode, enabling not only convenience in use but also faster operation in an emergency situation, as well as significant ease of maintenance. It provides an effect that can be improved.

1 is a view showing the overall appearance of a medical removable bipolar electrode according to the present invention.
2 is a diagram showing an exploded configuration of a catheter.
Figure 3 is a view schematically showing the overall cross-sectional configuration of the removable medical bipolar electrode according to the present invention.
Figure 4 is a view showing a state in which the stopper is coupled to the main body for single washing of the handpiece.
5 is a diagram schematically showing cross-sectional configurations of a shaft and a first active electrode;
6 is a diagram conceptually illustrating a process of injecting a drug solution into the body;
Figure 7 is a view showing the process of removing the catheter from the handpiece.
8 is an enlarged view of one end of the shaft;

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

Prior to the description of the present invention, the removable medical bipolar electrode (hereinafter, referred to as a bipolar electrode) according to the present invention is not only a function of cauterization such as tissue incision and hemostasis, but also various examinations, deposits in a body cavity or various organs. It is clarified that it can be used for various procedures such as discharge, suction of perfusate for washing, measurement of cardiovascular dynamics or central venous pressure, and drug injection such as contrast medium. do.

1 is a view showing the overall appearance of a removable medical bipolar electrode according to the present invention, FIG. 2 is a view showing an exploded structure of a catheter, and FIG. 3 schematically shows the overall cross-sectional structure of a medical removable bipolar electrode according to the present invention Figure 4 is a view showing a state in which the stopper is coupled to the main body for single cleaning of the handpiece, Figure 5 is a view schematically showing the cross-sectional configuration of the shaft and the first active electrode, and Figure 6 is a view showing the chemical solution into the body It is a view conceptually showing the injection process, FIG. 7 is a view showing the process of removing the catheter from the handpiece, and FIG. 8 is an enlarged view of one end of the shaft.

As shown in FIGS. 1 to 3 , the bipolar electrode according to the present invention may be largely defined as including a hand piece 100, a catheter 200, and a high frequency generator (not shown).

First, the handpiece 100 is configured to be gripped by the operator's hand, and may be designed in an ergonomic structure so as to be easily gripped in the form of a pen grip.

The catheter 200 is detachably coupled to one end of the handpiece 100 and the high frequency generator may be detachably connected to the other end.

The catheter 200 is configured to be inserted into a lesion site in the body during a procedure using a bipolar electrode, and in particular, is detachably provided at one end of the hand piece 100, and can be removed from the hand piece 100 and discarded when the procedure is finished. make it possible

Since the catheter 200 is made in the form of a thin tube and can be configured with various electrical devices, fluid passages, etc. inside, it is difficult to clean or sterilize after the procedure, so it is preferable to discard it after use. ), considering that it is not directly inserted into the body, it can be reused after cleaning or sterilization.

More specifically, the catheter 200 is made in the form of a tube made of a conductive material, and an energizing section is formed at one end and the other end by an insulator 211 formed on an outer circumferential surface, and the energizing section formed at one end is a first passive electrode 212. A shaft 210 through which an inlet 213 is formed on an outer circumferential surface, a first active electrode 220 coupled around the first passive electrode 212, and coupled to the outside of the shaft 210, the It may be exemplified as including a fluid moving part 230 extending to the first active electrode 220 across the inside of the shaft 210 through the inlet 213 .

The shaft 210 may be made of a conductive metal material, and is covered with an insulator 211 over the outer circumferential surface, and the insulator 211 exposes one end and a portion of the other end of the shaft 210 to the outside to form an upper surface of the shaft 210. An energized section of a certain area is formed.

At this time, one end of the energizing section is composed of the first passive electrode 212, and the first active electrode 220 is coupled on the first passive electrode 212 to provide the first passive electrode 212 and the first passive electrode 212 to the target lesion site. By contacting all of the first active electrodes 220 , a bipolar high-frequency region is formed at one end of the shaft 210 .

The active electrode and the passive electrode in this description may be an anode or a cathode according to convenience.

The energization section at the other end of the shaft 210 may again consist of the second active electrode 216 and the second passive electrode 215 . At this time, an insulator 211' is interposed between the second active electrode 216 and the second passive electrode 215 to have an insulating structure that prevents short circuiting.

Meanwhile, the first active electrode 220 is coupled to the first passive electrode 212, which is one end portion of the shaft 210. At this time, the first active electrode 220 is wired inside the shaft 210. It may be electrically connected to the second active electrode 216 through the connection wire 214 .

Although not shown, a temperature sensor is provided at one end of the shaft 210, that is, the first passive electrode 212, so that the temperature of the body tissue to be cauterized in a high frequency region can be measured in real time.

In addition, a plurality of shafts 210 may be coupled to the handpiece 100 in parallel.

The entirety of the shaft 210 may be made of a rigid metal material, but in some cases, a portion of one side may be made of a cannula tube structure made of a flexible material that can be flexibly inserted into the body.

Meanwhile, inside the tubular shaft 210, not only the connection wire 214 but also the fluid moving unit 230 may be wired along the longitudinal direction.

The fluid moving unit 230 is connected to a separate fluid injection device to provide a movement passage for injecting fluid into the body through the first active electrode 220, or is connected to a separate suction device to suck in and discharge internal substances. It provides an avenue to do so.

Fluid required for a procedure, such as physiological saline and alcohol, may be moved to the fluid moving unit 230 .

The fluid moving unit 230 is integrally coupled to the shaft 210 and can be handled together with the shaft 210. Accordingly, when the shaft 210 is removed from the handpiece 100 after the procedure is completed, the shaft 210 and It becomes a structure that can be removed together integrally, which is due to the structure in which the fluid moving unit 230 is coupled only on the shaft 210 without passing through the hand piece 100.

More specifically, the fluid moving unit 230 is coupled to the outside of the shaft 210 and through the holder 231 formed with a branch hole 231a communicating with the inlet 213 and the branch hole 231a. It may be exemplified as including a fluid pipe 232 inserted into the shaft 210 and connected to the first active electrode 220 .

The holder 231 has a structure surrounding the outside of the shaft 210, and in the case of the branching hole 231a, it is branched diagonally toward the outside of the holder 231 to support the fluid transfer pipe 232.

The fluid transfer pipe 232 is installed to cross the inside of the shaft 210 through the branch port 231a and the inlet 213 communicating with each other, and has a completely sealed structure inside the shaft 210, so that it is exposed to the body during the procedure. In addition, even in the case of the fluid flowing in the fluid pipe 232, it does not leak into the shaft 210 and is sealed in the fluid pipe 232 so that it can be injected into the body or discharged from the body. will be equipped

One end of the fluid pipe 232 may be connected to the first active electrode 220 and the other end may be directly connected to an injection device or a suction device. 232, the fluid is pressurized up to the first active electrode 220, flows out around the first active electrode 220, and can be injected into the body.

In a specific section of the fluid pipe 232 embedded in the shaft 210, the flow of the fluid operating in the fluid pipe 232 cannot be visually confirmed, but the fluid pipe exposed to the outside through the branch hole 231a ( 232), the flow of the fluid operating in the fluid pipe 232 can be observed with the naked eye, so that the accuracy and convenience of the procedure can be guaranteed.

On the other hand, if some components of the fluid moving unit 230 completely pass through the inside of the handpiece 100 or are built into the handpiece 100, apart from the removal of the shaft 210, the fluid moving unit 230 is moved to the hand. A problem arises on the piece 100 that cannot be easily removed.

In addition, when the fluid moving unit 230 crosses the inside of the hand piece 100 in addition to crossing the inside of the shaft 210 in the longitudinal direction, it is difficult for the operator to visually grasp the flow of the fluid in the fluid moving unit 230. There is a problem that becomes difficult to manipulate the fluid.

Next, a high-frequency generator (not shown) serves to activate a high-frequency region around the catheter 200 by applying a high-frequency alternating current to the catheter 200 coupled to the handpiece 100. It is detachably coupled on the hand piece 100 through.

The high-frequency generator can adopt the concept of a high-frequency generator widely used in general electrical procedures as it is in the line of generating high-frequency alternating current, and at this time, the active terminal (At) and the passive terminal ( Pt) may electrically contact the shaft 210 inserted into the handpiece 100 to supply high-frequency alternating current to the first active electrode 220 and the first passive electrode 212 .

Next, the handpiece 100 is detachably coupled to the main body 110 constituting the exterior of the handpiece 100 and one end of the main body 110, and the holder 231 is coupled to one end of the shaft 210. It may be illustrated as including a cover 120 for fixing and a holding part 130 built into the main body 110 to detachably support the other end of the shaft 210.

The main body 110 is made of a structure in which one end and the other end are formed openly, and the bearing space 111 for accommodating the shaft 210 and the holding installation space 112 for installing the holding part 130 to be described later are installed in each other. It is prepared to communicate.

A fixing table 116 may be formed on the outside of the main body 110 to grip and fix the fluid pipe 232 extending around the handpiece 100 from both sides.

The cover 120 coupled to the open end of the main body 110 surrounds the holder 231 coupled to the outside of the shaft 210 from the outside, but at least, the avoidance port 121 to avoid the branching hole 231a The position of the holder 231 can be fixed so that the holder 231 does not randomly wander or move on the outer circumferential surface of the shaft 210.

At this time, an O-ring 233 is interposed between the outer surface of the holder 231 and the inner surface of the cover 120 so that body fluids or chemical fluids flowing along the outer surface of the shaft 210 do not flow backward into the main body 110. It has a structure and, at the same time, has a structure capable of limiting the arbitrary positional movement of the holder 231 on the cover 120 by adding frictional force.

Although not shown, protrusions or grooves may be formed on the inside of the cover 120 to be coupled to the holder 231 in a grooved protrusion structure, and on the outside of the holder 231, protrusions or grooves formed on the cover 120 may be formed. Complementary structures may be formed to have structures made detachable from each other.

On the other hand, when cleaning or sterilizing only the handpiece 100 from which the catheter 200 is removed after the procedure is performed, the connection system between the cover 120 and the high frequency generator is separated from the main body 110 as shown in FIG. 4, Washing or sterilization may be performed in a state in which the inside of the main body 110 is sealed by combining the stopper 113 to one open end and the other end of the main body 110 .

In addition, a sealing member 114 may be formed on the path of the bearing receiving space 111 to restrict the movement of fluid toward the bearing receiving space 111 .

At this time, the fluid directed to the bearing space 111 may be a cleaning or sterilizing liquid when washing or sterilizing the hand piece 100 alone, and may be a body fluid or chemical liquid during a procedure.

The sealing member 114 has a ring shape made of elastically deformable silicone material and has a plurality of elastic protrusions 115 protruding toward the center.

Accordingly, as shown in FIG. 4, in the state in which the catheter 200 is removed, the facing elastic protrusions 115 are cross-entangled with each other, providing an atmosphere in which the central portion of the sealing member 114 is shielded, and the catheter ( 200), the facing elastic protrusions 115 are widened by the shaft 210 inserted into the bearing space 111 and have a structure capable of sufficiently passing the shaft 210 through the central portion.

Accordingly, it is possible to prevent various electrical devices from being damaged by moisture as well as cleaning or sterilizing liquid as well as bodily fluid leaked during the procedure penetrates into the body 110 .

Next, the holding part 130 detachably supports the shaft 210 on the hand piece 100, but the shaft 210 and the high frequency generator so that the high frequency alternating current applied from the high frequency generator can be conducted to the shaft 210. It plays a mediating role between

The holding part 130 is installed in the holding installation space 112 and has an active terminal (At) of the high frequency generator coupled to the other end of the shaft 210 extending and inserted into the holding installation space 112 and the other end of the main body 110. and the passive terminal Pt are electrically connected to each other.

More specifically, the holding part 130 is a connector 131, one end is coupled to the connector 131 and the other end is formed in the form of a free end and is supported by the second active electrode 216 in contact with the first active electrode ( 220) and one end of the active electrode piece 132 forming a contact is coupled to the connector 131 and the other end is formed in the form of a free end and is supported by the second passive electrode 215 in contact with the first passive electrode 212 ) and a passive electrode piece 133 forming a contact point.

The connector 131 is fixedly installed on the holding installation space 112 and supports the active electrode piece 132 and the passive electrode piece 133 on one side and the active terminal (At) and the passive terminal (At) of the high frequency generator on the other side. Pt) is connected.

A high frequency generator may be coupled to the connector 131 to form contact points between the active electrode piece 132 and the passive electrode piece 133 .

The active terminal (At) of the high frequency generator is electrically connected to the active electrode piece 132 of the connector 131, the passive terminal (Pt) is electrically connected to the passive electrode piece 133 of the connector 131, and then , The active electrode piece 132 and the passive electrode piece 133 are connected to the second active electrode 216 and the second passive electrode 215 of the shaft 210, respectively, and as a result, the above-described first active electrode 220 ) and the first passive electrode 212 may form a so-called bipolar electrode serving as an anode and a cathode, respectively.

Accordingly, when electric energy is applied from the high frequency generator, an alternating current in a high frequency region (200 to 1200 kHz) propagates between the first active electrode 220 and the first passive electrode 212. During the propagation of alternating current, frictional energy caused by ion vibration raises the temperature of living tissue such as blood vessels and tumors, inducing coagulative necrosis, thereby occluding bleeding blood vessels or cauterizing tumors.

On the other hand, when high-frequency cauterization is performed using a monopolar electrode, there is inconvenience in use in that a ground pad must be attached to the patient, and above all, the current transmission path from the electrode to the ground pad is formed long, so that it must be blocked. There was a problem of affecting other major blood vessels or tissues accompanying blood vessels.

However, when the bipolar electrode is used as in the present invention, since a delivery path is formed locally only between the first active electrode 220 and the first passive electrode 212, there is an advantage in not causing side effects to other tissues or blood vessels.

The active electrode piece 132 and the passive electrode piece 133 may be formed of an elastically deformable thin metal plate structure and may be disposed to face each other with the other end of the shaft 210 interposed therebetween.

At this time, holding balls 132a and 133a are formed at the other ends of the active electrode piece 132 and the passive electrode piece 133, respectively, and the holding balls 132a and 133a are formed on the second active electrode 216 and the second passive electrode 215 ( It consists of a structure in which the holding grooves 216a and 215a in which the 132a and 133a are hooked and supported are recessed.

The retaining balls 132a and 133a may be made of a conductive metal material similarly to the respective electrode pieces (active electrode piece and passive electrode piece), and the holding grooves 216a and 215a are cylindrical tube-shaped second active electrodes 216 and The outer circumferential surface of the second passive electrode 215 is depressed in a spherical shape complementary to the retaining balls 132a and 133a to have an undercut shape.

Accordingly, when the retaining balls 132a and 133a are caught in the retaining grooves 216a and 215a, the retaining balls 132a and 133a can secure a wider contact area on the electrode, and in this state, the shaft 210 It can be fixedly coupled to the handpiece 100, such as randomly moving in one direction of the handpiece 100 or not rotating in place.

Accordingly, while the movement of the catheter 200 is more effectively restricted during the procedure, the first active electrode 220 and the first passive electrode 212 continuously conduct alternating current without interruption, enabling a more stable procedure.

On the other hand, when the procedure is finished, the operator moves the shaft 210 to one side by pulling the catheter 200 to one side by applying a predetermined traction force while holding the catheter 200 by hand, as shown in FIG. 215a), while the holding balls 132a and 133a, which were held on the holding grooves 216a and 215a, induce elastic deformation in the direction in which the passive electrode piece 133 and the active electrode piece 132 spread, thereby , the second passive electrode 215 and the second active electrode 216 of the shaft 210, which were position-constrained by the passive electrode piece 133 and the active electrode piece 132, are completely spaced apart from the holding part 130, (210) can be discharged to the outside of the hand piece (100).

And, even when the catheter 200 is coupled to the hand piece 100 for the procedure, when the shaft 210 is pushed in the direction of the holding part 130, the holding balls 132a and 133a form the holding grooves 216a, 215a) and can be naturally caught and supported on the holding grooves 216a and 215a at a specific position.

Accordingly, not only the fixing effect of the shaft 210 during the procedure, but also the ease of attachment and detachment of the catheter 200 is guaranteed to improve the ease of maintenance, provide convenience in use, and enable more rapid procedure in an urgent situation. can provide the effect of

On the other hand, as shown in FIG. 8, the first active electrode 220 is coupled to be exposed to the outside of the first passive electrode 212, but the vertical pipe 221a and the horizontal pipe 221b are bent in a 'L' shape. housing 221 made of insulating ceramic material in which an 'L'-shaped mounting hole 221c and 'L'-shaped wire insertion holes 221d and 221e are formed, into which one end of the fluid transfer pipe 232 is inserted. , the electrode tip 222 coupled to the end of the vertical pipe 221a of the housing 221, exposed to the outside of the housing 221, and having an outlet hole 222a communicating with the mounting hole 221c formed through the electrode tip 222 and the It may be illustrated as including a vertical conductor 223 wired to the conductor insertion hole 221e of the vertical tube 221a of the housing 221 and forming a contact with the electrode tip 222.

At this time, the connecting wire 214 is inserted into the wire insertion hole 221d of the horizontal tube 221b of the housing 221, and the wire of the vertical tube 221a is bent at the bending point of the horizontal tube 221b and the vertical tube 221a. A contact may be formed by coming into contact with the vertical conductor 223 wired to the insertion hole 221e.

Accordingly, the electrode tip 222 is electrically connected to the second active electrode 216 as well.

On the other hand, the reason why the connecting wire 214 and the vertical wire 223 are contacted inside the 'L'-shaped wire insertion holes 221d and 221e is that the size of the first active electrode 220 itself is very narrow. This is because the electrode tip 222 and the wire for electrical connection could not be easily bent inside the housing 221.

That is, in this embodiment, the straight connection wire 214 and the vertical wire 223 are connected and connected to each other inside the housing 221 without bending the wire, so that AC can be applied to the electrode tip 222 without a wire having a specially bent structure. There will be a structure that will make it possible.

In addition, one end of the fluid pipe 232 is opened to the outside through the outlet hole 222a of the electrode tip 222 while being supported on the mounting hole 221c of the housing 221, and the fluid pipe 232 It has a structure that can accurately flow out of not only the fixation action but also other chemical liquids to the high-frequency area activation area without backflow, so you can expect even the accuracy of the procedure.

The embodiments of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.

100: handpiece
200: catheter
110: body
120: cover
130: holding unit
210: shaft
220: first active electrode
230: fluid moving unit
211 insulator
212: first passive electrode
213: inlet
214: connecting wire
215: second passive electrode
216: second active electrode

Claims (5)

hand piece;
a catheter detachably coupled to one end of the handpiece and inserted into a lesion site in the body; and
A medical detachable bipolar electrode comprising a; high frequency generator for activating a high frequency region around the catheter by applying a high frequency alternating current to the catheter coupled to the handpiece. The method of claim 1,
The catheter is
A shaft made of a tube of conductive material and having an insulator formed on an outer circumferential surface to form an energizing section at one end and the other end, wherein the energizing section formed at one end is made of a first passive electrode and has an inlet through the outer circumferential surface;
a first active electrode coupled around the first passive electrode; and
A medical removable bipolar electrode comprising a; fluid moving part coupled to the outside of the shaft and extending to the first active electrode across the inside of the shaft through the inlet. The method of claim 2,
The fluid moving part,
a holder coupled to the outside of the shaft and having a branch hole communicating with the inlet; and
A medical removable bipolar electrode comprising a; fluid transfer pipe inserted into the shaft through the branch hole and connected to the first active electrode. The method of claim 3,
The conducting section formed at the other end of the shaft is composed of a second active electrode and a second passive electrode, and the first active electrode is electrically connected to the second active electrode through a wire wired inside the shaft. Removable bipolar electrode. The method of claim 4,
The handpiece,
main body; and
A medical detachable bipolar electrode comprising a; holding part built into the main body to detachably support the other end of the shaft.

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