KR102665235B1 - Bipolar type medical electrode system - Google Patents

Abstract

The present invention relates to a bipolar medical electrode system. More specifically, the present invention relates to a bipolar type medical electrode system, and more specifically, by configuring a hard catheter to be bendable and manipulable without changing the length of the tip, sufficient rigidity of the catheter can be maintained in the body, thereby eliminating unnecessary use of the catheter during the procedure. This relates to a bipolar medical electrode system that effectively prevents deformation and ensures surgical safety and convenience.

Description

Bipolar type medical electrode system

The present invention relates to a bipolar medical electrode system. More specifically, the present invention relates to a bipolar type medical electrode system, and more specifically, by configuring a hard catheter to be bendable and manipulable without changing the length of the tip, sufficient rigidity of the catheter can be maintained in the body, thereby eliminating unnecessary use of the catheter during the procedure. This relates to a bipolar medical electrode system that effectively prevents deformation and ensures surgical safety and convenience.

Generally, when a lesion occurs in a body organ, it is treated with a surgical operation or procedure. The procedure can generally be understood as a non-surgical method, and such non-surgical procedures have a lower risk compared to surgical methods, have a lower incidence of surgical trauma, and can be performed relatively simply. Non-surgical methods are widely used, except for indications requiring surgery.

A representative example of a non-surgical treatment method is treatment using high-frequency electrodes (monopolar or bipolar electrodes).

Treatment using high-frequency electrodes involves inserting high-frequency electrodes into the body to conduct various tests, cauterize lesions, discharge accumulated substances in body cavities or various organs, aspirate perfusate for irrigation, measure cardiovascular dynamics or central venous pressure, use contrast agents, etc. It is a concept that includes procedures such as drug injection, and is widely used in various medical fields.

On the other hand, the instruments used in high-frequency treatment are structured to allow electricity to be transmitted to the lesion while being inserted into fine human tissues such as blood vessels without difficulty, and are largely comprised of a small-diameter tubular shaft, a handpiece supporting the shaft, and It is exemplified as including a high-frequency generator that supplies high-frequency alternating current to the shaft.

At this time, a guide wire made of shape memory alloy with the tip bent in an arc is installed on the shaft, and as the operator manipulates the guide wire, the guide wire is exposed to the tip of the shaft and bent in an arc, allowing it to be applied to lesion areas that are difficult to access. A structure that allowed access to the electrode tip was common.

However, as the guide wire is manipulated, the length of the tip of the shaft increases or decreases, and the depth of insertion of the shaft into the treatment area must be adjusted in consideration of this change in the length of the tip of the shaft. Therefore, operators who do not have sufficient experience in the procedure It was difficult to use, and sufficient rigidity could not be provided in the area stretched by the guide wire, so there was a problem that the treatment effect was low in indications that required the procedure to be performed with the electrode tip in airtight contact with the hard tissue.

Registered Patent 10-1227635

The present invention was created to solve the above-mentioned problems in the prior art, and by configuring a hard catheter to be bendable and manipulable without changing the length of the tip, sufficient rigidity of the catheter can be maintained in the body, and thus the catheter's strength can be maintained during the procedure. The purpose is to provide a bipolar medical electrode system that effectively prevents unnecessary deformation and ensures surgical safety and convenience.

The present invention is a means to achieve the above object, and is made in the form of a tube made of conductive material, a portion of which is divided into a first shaft and a second shaft, and the outer peripheral surface is covered by an insulator, and the second shaft is exposed from the insulator. A catheter consisting of a passive electrode at one end of the catheter; an active electrode coupled to one end of the second shaft; a traction wire built into the catheter and fixed to the second shaft to pull the second shaft; a passive connecting wire electrically connecting the high frequency generator and the second shaft; An active connection wire electrically connecting the high frequency generator and the active electrode; and a core that is coupled between the first shaft and the second shaft and is made of an elastically deformable material and elastically deforms correspondingly when the second shaft is pulled by the pull wire.

In addition, the active electrode is coupled to be exposed to the outside of the second shaft, and is coupled to a housing made of ceramic material in which the vertical pipe and the horizontal pipe are bent and joined in an 'ㄱ' shape, and to the end of the vertical pipe of the housing to be exposed to the outside of the housing. Characterized in that it includes an exposed electrode tip.

In addition, the electrode tip includes: a plate-shaped electrode plate mounted to close the end of an open vertical tube; and an electrode body coupled to the electrode plate and exposed to the outside.

Additionally, the electrode body includes: a support; and a cylindrical electrode drum rotatably coupled to the support.

In addition, the electrode plate is formed with a rotation axis coupled to the vertical pipe, and the electrode body is formed on one side and the other side of the electrode plate, respectively.

In the present invention, since the core elastically supports the hard first and second shafts made of metal, etc., when the second shaft is pulled through a traction wire, one end of the catheter can be bent at a certain angle, making access difficult. In addition to being able to place the electrode at the lesion site, when one end of the catheter is bent, the length of the catheter is not deformed, and due to the rigidity of the first and second shafts, it has sufficient resistance to deformation in the body. , the operation response of the catheter can be made more intuitive, and thus the convenience and precision of the procedure can be guaranteed.

1 is a diagram showing the overall external configuration of a bipolar medical electrode system according to the present invention.
Figure 2 is a diagram schematically showing the exploded configuration of the main parts of the bipolar type medical electrode system according to the present invention.
Figure 3 is a diagram schematically showing the cross-sectional configuration of the main part of the bipolar type medical electrode system according to the present invention.
Figure 4 is a diagram illustrating components built into the core and each receiving hole.
Figure 5 is a diagram showing the exploded configuration of the first shaft and the second shaft.
Figure 6 is a diagram showing the bending action of the catheter.
Figure 7 is a diagram showing an example of an active electrode.
Figure 8 is a diagram schematically showing the cross-sectional configuration of one end of the catheter to which the active electrode of Figure 7 is applied.
Figure 9 is a diagram showing an example of an active electrode.
Figure 10 is a diagram schematically showing the cross-sectional configuration of one end of the catheter to which the active electrode of Figure 9 is applied.
Figure 11 is a diagram showing the process of rotating the electrode tip.

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 limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

Prior to the description of the invention, the bipolar medical electrode system (hereinafter referred to as the electrode system) according to the present invention is not only used for cauterization such as tissue incision and hemostasis, but also for various examinations and internal organs such as body cavities and various organs. It is revealed that it can be used for various procedures such as discharge of accumulated matter, aspiration of perfusate for cleaning, measurement of cardiovascular dynamics or central venous pressure, injection of drugs such as contrast medium, and the specific structure of the electrode system is shown with reference to the drawing attached below. Let me explain.

As shown in Figures 1 to 3, the electrode system according to the present invention largely includes a catheter 100, an active electrode 300, a traction wire 500, a high frequency generator (not shown), a passive connection wire 200, It may be defined as including an active connection wire 400 and a core 600.

First, the catheter 100 is configured to be inserted into the lesion site in the body during a procedure using an electrode system, and is provided to be detachable from one end of a handpiece (not shown). When the procedure is completed, it is removed from the handpiece and discarded or cleaned or sterilized. Reinstallation on the handpiece can then be performed.

More specifically, the catheter 100 is made in the form of a tube made of conductive material, and a portion is divided into a first shaft 110 and a second shaft 120, and the outer peripheral surface is covered by an insulator 130. The passive electrode 121 is formed from one end of the second shaft 120 exposed from 130.

That is, the first shaft 110 and the second shaft 120 can be completely separated from each other, and the insulator 130 can completely cover the first shaft 110 and the second shaft 120. One part of the device is exposed to the outside to apply electrical stimulation to the lesion area.

At this time, the portion of the second shaft 120 exposed from the insulator 130 is referred to as the passive electrode 121. The active electrode 300 and the passive electrode 121 referred to in this description may be an anode or a cathode depending on convenience.

The first shaft 110 and the second shaft 120, which are completely separated, may be coupled and supported to each other by a core 600, which will be described later.

An inlet 111 is formed penetrating the outer peripheral surface of the other side of the first shaft 110, so that a fluid transfer pipe 700, which will be described later, can penetrate into the catheter 100 through the inlet 111.

The second shaft 120 may be electrically connected to the passive terminal of the high frequency generator through a passive connection wire 200 wired inside the catheter 100.

Next, the active electrode 300 is coupled to the passive electrode 121, which is one end of the second shaft 120. At this time, the active electrode 300 is connected to the active connection wire wired inside the catheter 100. It can be electrically connected to the active terminal of the high frequency generator through (400).

The high-frequency generator is responsible for activating a high-frequency area around the catheter 100 by applying high-frequency alternating current to the catheter 100 coupled to the handpiece.

The high-frequency generator can be used to generate high-frequency alternating current, and can adopt the concept of a high-frequency generator widely used in general electrical procedures. At this time, the active terminal and passive terminal of the high-frequency generator are connected to the active connection wire 400 and passively, respectively. The conductor 200 is connected to supply high-frequency alternating current to the active electrode 300 and the passive electrode 121.

Accordingly, when both the active electrode 300 and the passive electrode 121 are in contact with the target lesion site and electric energy is applied from the high frequency generator, a high frequency region 200 is formed between the active electrode 300 and the passive electrode 121. An alternating current of ~1200 kHz is propagated. In the process of propagating alternating current in this way, friction energy caused by ion vibration increases the temperature of biological tissues such as blood vessels and tumors, thereby inducing coagulative necrosis, which can occlude bleeding blood vessels or cauterize tumors.

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

However, using a bipolar electrode as in the present invention has the advantage of not causing side effects to other tissues or blood vessels because a transmission path is formed locally only between the active electrode 300 and the passive electrode 121.

Although not shown, a temperature sensor is combined with the second shaft 120 or the active electrode 300 to measure the temperature of body tissue being cauterized in a high-frequency region in real time.

The specific structure of the active electrode 300 will be described later.

Next, the traction wire 500 pulls the second shaft 120 to the other side according to the operator's traction operation, thereby bending one end of the catheter 100 at a certain angle to position the electrode site at the lesion site that is difficult to access. It is a configuration that allows you to do so.

The traction wire 500 is built into the catheter 100, with one end fixed to the inside of the second shaft 120 and the other end exposed to the other end of the first shaft 110 so that it can be coupled to the handpiece.

Accordingly, the operator can control the traction wire 500 coupled to the handpiece through manual manipulation.

Next, the core 600 is coupled between the first shaft 110 and the second shaft 120, which are separated from each other, and is made of an elastically deformable material. As shown in FIG. 6, the core 600 is formed by the traction wire 500. 2 When the shaft 120 is pulled, it elastically deforms in response, thereby elastically supporting the second shaft 120 on the first shaft 110.

That is, the separated first shaft 110 and second shaft 120 can be supported in both directions by the core 600, and the second shaft 120 is pulled backward according to the pulling of the pulling wire 500. Even if it is bent, the two-way coupling state of the first shaft 110 and the second shaft 120 can be maintained by being curved.

The core 600 is made of an insulating material to prevent short circuit between the first shaft 110 and the second shaft 120, thereby preventing high-frequency alternating current applied to the passive electrode 121 from being conducted to the first shaft 110. do.

When the traction force of the traction wire 500 is removed, the core 600 is restored to its original state by elastic restoring force, and the first shaft 110 and the second shaft 120 are positioned in a straight line.

The core 600 may be cylindrical and may have a plurality of receiving holes 610 formed along the axial direction.

A passive connection wire 200, an active connection wire 400, a traction wire 500, a fluid transfer pipe 700, etc. can pass through each receiving hole 610. Accordingly, the core 600 does not interfere with the configuration of each connecting wire, traction wire 500, and fluid transfer pipe 700.

Meanwhile, as shown in FIG. 5, one lower end of the first shaft 110 may be cut to a certain extent to form a cut groove 112. Accordingly, as shown in FIG. 6, the first shaft 110 Even if the second shaft 120 is inclined at a certain angle, the first shaft 110 and the second shaft 120 do not interfere with each other, and at the same time, the second shaft in the opposite direction shown in FIG. 120) A structure is provided that can limit the tilt movement.

Accordingly, even if the operation of the traction wire 500 is somewhat inexperienced, the safety of the procedure can be guaranteed because the one end of the catheter 100 is not bent in an irregular direction and is always bent in the same direction.

The fluid transfer pipe 700 is connected to a separate fluid injection device to provide a moving passage for injecting fluid into the body through the active electrode 300, or, conversely, is connected to a separate suction device to suck in and discharge substances from the body. Provides a passageway.

Fluids necessary for the procedure, such as physiological saline solution and alcohol, can be moved through the fluid transfer tube 700.

The fluid transfer tube 700 is integrally combined with the catheter 100 and can be handled together with the catheter 100. Accordingly, when the catheter 100 is removed from the handpiece after completion of the procedure, it is integrated with the catheter 100. It becomes a structure that can be removed.

The fluid transfer tube 700 extends across the inside of the catheter 100 through the inlet 111 to the active electrode 300, and has a structure that is completely sealed inside the catheter 100, allowing it to enter the body during the procedure. It has a structure that is not exposed, and even in the case of fluid flowing in the fluid transfer pipe 700, it does not leak into the catheter 100 and is sealed in the fluid transfer pipe 700 so that it can be injected into the body or discharged from the body. A structure is established.

One end of the fluid transfer pipe 700 may be connected to the active electrode 300 and the other end may be directly connected to an injection device or a suction device. In the case of an embodiment in which the fluid transfer pipe 700 is directly connected to the injection device, the chemical solution is connected to the fluid transfer pipe 700. When injected, this fluid can be pressured to the active electrode 300, flow out around the active electrode 300, and be injected into the body.

In a specific section of the fluid transfer pipe 700 built into the catheter 100, the flow of fluid operating in the fluid transfer pipe 700 cannot be visually confirmed, but the fluid transfer pipe 700 exposed to the outside of the inlet 111 In this way, the flow of fluid operating in the fluid transfer pipe 700 can be observed with the naked eye, thereby ensuring the accuracy and convenience of the procedure.

Hereinafter, specific embodiments of the active electrode 300 will be described with reference to the accompanying drawings.

As shown in FIG. 3, the active electrode 300 is largely exposed to the outside of the second shaft 120, and is made of a ceramic material in which the vertical tube 311 and the horizontal tube 312 are bent and joined in an 'ㄱ' shape. It can be defined as including a housing 310 and an electrode tip 320 that is coupled to the end of the vertical tube 311 of the housing 310 and exposed to the outside of the housing 310.

At this time, an 'L' shaped mounting hole 313 where one end of the fluid transfer pipe 700 is inserted into the vertical pipe 311 and the horizontal pipe 312 and an 'L' shaped conductor insertion hole 311a, 312a) may be formed.

A vertical conductor 314 forming a contact point between the active connection conductor 400 and the electrode tip 320 may be installed in the conductor insertion hole 311a of the vertical pipe 311.

The active connection wire 400 is inserted into the wire insertion hole 312a of the horizontal tube 312 of the housing 310, and the wire is inserted into the vertical tube 311 at the bending point of the horizontal tube 312 and the vertical tube 311. A contact point can be formed by contacting the vertical conductor 314 wired in the hole 311a. Accordingly, the electrode tip 320 is electrically connected to the high frequency generator.

Meanwhile, the reason why the active connection wire 400 and the vertical wire 314 are connected to contact within the 'L' shaped wire insertion holes 311a and 312a is because the size of the active electrode 300 itself is very narrow. This is because the conductive wire for electrical connection with the electrode tip 320 could not be easily bent inside the housing 310.

That is, in this embodiment, the straight active connection wire 400 and the vertical wire 314 are connected to each other inside the housing 310 without bending the wire, thereby supplying alternating current to the electrode tip 320 without a wire of a specially bent structure. A structure that can be applied is in place.

In addition, one end of the fluid transfer pipe 700 is opened to the outside through the outlet hole 321a of the electrode tip 320 while being supported on the mounting hole 313 of the housing 310, so that the fluid transfer pipe 700 In addition to the fixing effect, the structure allows other chemicals to flow accurately to the high-frequency area active area without reflux, so treatment accuracy can be expected.

Next, the electrode tip 320 is coupled to the plate-shaped electrode plate 321 and the electrode plate 321 mounted to close the end of the open vertical pipe 311 as shown in FIG. 3 to be exposed to the outside. It may be illustrated as including an exposed electrode body 322.

The electrode plate 321 and the electrode body 322 are made of a conductive metal material and may be made integrally. The vertical conductor 314 may be connected to the electrode plate 321.

An outlet hole 321a communicating with the mounting hole 313 may be formed through the electrode plate 321. Accordingly, the fluid flowing in the fluid transfer pipe 700 can flow out from the outside of the active electrode 300 and be injected into the body.

The electrode body 322 may be exemplified in the form of a protrusion so that frictional stimulation can be applied directly to the lesion site in addition to electrical stimulation.

At this time, when the electrode body 322 is in contact with hard tissue such as bone, it slides more smoothly on the surface of the bone, which has an irregular surface structure, and prevents excessive frictional stimulation beyond the therapeutic level or severe damage to the bone. Have a structure.

For this purpose, the electrode body 322 may be illustrated as having a structure including a support stand 322a and a cylindrical electrode drum 322b rotatably coupled to the support stand 322a as shown in FIG. 7. there is.

The support 322a may be fixedly coupled to the electrode plate 321 and may be configured with a structure such as a fixed bearing to rotatably support the electrode drum 322b.

The electrode drum 322b is configured to be in direct contact with the lesion area and is in rolling contact with the surface of the lesion, so that the electrode tip 320 is in flexible rolling contact with the surface of the lesion without frictional resistance during the process of sweeping the lesion surface. It can be done.

The electrode drum 322b may be hollow as shown in FIG. 7A or may be solid as shown in FIG. 7B.

Meanwhile, the electrode body 322 is formed on one side and the other side of the electrode plate 321 as another dimension, and the electrode tip 320 is rotated according to the situation to form one of the pair of electrode plates 321. By using at least one of them exposed to the outside, it has a structure that allows effective treatment of various areas even without replacing each electrode body 322.

Here, electrode bodies 322 of different specifications mean that when the electrode bodies 322 are in the form of protrusions, the size and number of protrusions are different from each other. In the case of the above-described embodiment, the electrode drum 322b The diameter, length, etc. may mean different things.

More specifically, a rotation shaft 321b that is axially coupled to the vertical tube 311 may be formed on the electrode plate 321, and at the bottom of the vertical pipe 311, a shaft support member 311c supports the rotation shaft 321b. ) can be formed.

Accordingly, the electrode tip 320 itself can rotate in place based on the rotation axis 321b, and when at least one of the pair of electrode bodies 322 is exposed to the outside of the vertical tube 311, the other electrode is exposed to the outside of the vertical tube 311. The sieve 322 has a structure to be accommodated inside the vertical pipe 311.

Meanwhile, in order to limit the rotation of the electrode tip 320, a locking pin 323 may be fastened through the vertical tube 311 and the electrode plate 321.

At this time, a first pin insertion hole 321c may be formed through the electrode plate 321 in a direction intersecting the rotation axis 321b, and a second pin insertion hole 321c communicating with the first pin insertion hole 321c may be formed in the vertical pipe 311. A pin insertion hole 311b may be formed.

Accordingly, when the locking pin 323 is fastened to the first pin insertion hole 321c and the second pin insertion hole 311b, the rotational movement of the electrode tip 320 at the fixed position may be restricted.

Also, in this embodiment, the active connection wire 400 has a structure that is directly connected to the rotation axis 321b so that alternating current can be supplied even when the electrode tip 320 is rotated. In addition, although not shown, the rotation axis 321b and the active connection wire 400 are connected via a swivel joint and have a structure that prevents the active connection wire 400 from being twisted even when the electrode tip 320 is rotated. You can.

In summary, in the present invention, the core elastically supports the hard first shaft and the second shaft made of metal, etc., so when the second shaft is pulled through the traction wire, one end of the catheter can be bent at a certain angle, Not only can the electrode area be placed in a difficult-to-access lesion area, but there is no deformation in the length of the catheter when one end of the catheter is bent. Additionally, due to the rigidity of the first and second shafts, there is sufficient resistance to deformation in the body. By having this, the operation response of the catheter can be made more intuitive, and thus the convenience and precision of the procedure can be guaranteed.

The embodiments of the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

100: catheter
200: Passive connection wire
300: active electrode
400: Active connecting lead
500: Traction wire
600: core
700: Fluid transfer tube

Claims (5)

A catheter made of a conductive material in the form of a tube, a portion of which is divided into a first shaft and a second shaft, the outer peripheral surface of which is covered by an insulator, and a passive electrode is formed by one end of the second shaft exposed from the insulator;
an active electrode coupled to one end of the second shaft;
a traction wire built into the catheter and fixed to the second shaft to pull the second shaft;
A passive connecting wire electrically connecting the high frequency generator and the second shaft;
An active connection wire electrically connecting the high frequency generator and the active electrode; and
A core that is coupled between the first shaft and the second shaft and is made of an elastically deformable material and elastically deforms correspondingly when the second shaft is pulled by the pull wire,
The active electrode is,
A housing made of ceramic material that is coupled to be exposed to the outside of the second shaft and where the vertical pipe and the horizontal pipe are bent and joined in an 'ㄱ' shape, and
It includes an electrode tip coupled to the end of the vertical tube of the housing and exposed to the outside of the housing,
A bipolar type medical electrode system characterized in that a vertical conductor forming a contact point between an active connection conductor and an electrode tip is installed in a conductor insertion hole formed inside a vertical pipe. delete In claim 1,
The electrode tip is,
A plate-shaped electrode plate mounted to close the end of an open vertical pipe; and
A bipolar type medical electrode system comprising: an electrode body coupled to the electrode plate and exposed to the outside. In claim 3,
The electrode body is,
support fixture; and
A bipolar type medical electrode system comprising a cylindrical electrode drum rotatably coupled to the support. In claim 4,
A rotation axis is formed on the electrode plate and is axially coupled to the vertical tube,
A bipolar type medical electrode system, characterized in that the electrode body is formed on one side and the other side of the electrode plate, respectively.

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