KR101525125B1 - Electrode assembly for nucleoplasty and nucleoplasty apparatus using the same - Google Patents

Abstract

Disclosed are an electrode assembly for nucleoplasty and a nucleoplasty apparatus comprising the same. The electrode assembly for nucleoplasty according to the present invention comprises: a first electrode which is used in nucleoplasty for generating a plasma field and removing vertebral pulp of a disk, and is formed in the foremost part with respect to the side of entering the disk; a second electrode which is formed behind the first electrode with respect to the side of entering the disk; a first insulator which is formed between the first electrode and the second electrode; a third electrode which is formed behind the second electrode with respect to the side of entering the disk; and a second insulator which is formed between the second electrode and the third electrode, wherein the second electrode is connected to power selectively with the first electrode or the third electrode in order to change a generation type of the plasma field.

Description

TECHNICAL FIELD [0001] The present invention relates to an electrode assembly for nucleus pulposusplasty, and a nucleus-

More particularly, the present invention relates to an electrode assembly for a nucleus pulposusplasty and, more particularly, to a plasma nucleus forming machine including a plunger for generating a plasma around the electrode, And a tubular molding machine including the electrode assembly.

The lumbar herniated intervertebral disc is a disease in which the intervertebral disc protrudes to cause back pain and neurological symptoms. The fibrous ring surrounding the edge of the intervertebral disc has a circumferential fissure and radioactive Radial tear occurs. In particular, if you try to move a heavy object to the side, you will be in a state of excessive flexion and under the influence of compression force and salt power, the nucleus in the middle of the intervertebral disc is no longer accumulated in the fibrous ring, Resulting in prolapse.

The prominent symptom of lumbar intervertebral disc herniation is pain in the legs and stiffness with back pain. The escaped discs stimulate the nerve roots and cause sensory abnormalities in the body parts where the nerve roots are distributed. It usually appeals to the senses and numbness, but it also manifests itself as hyperalgesia. Muscle weakness also weakens the fifth leg neuromuscular conduction when the foot is weakened, it becomes difficult to walk with the heel. In rare cases, if the protruding nucleus is large and centrally located, it may have feces function, sexual dysfunction, and paraplegia.

Treatment of disc herniation can be divided into conservative and operative methods.

Conservative therapies include absolute stabilization, taking anti-inflammatory drugs, pelvic traction, thermal therapy, ultrasound therapy, transcutaneous electrical nerve stimulation (TENS), massage, wearing corsets or orthoses, epidural corticosteroids epidural steroid injection, abdominal strengthening exercises, and proper back training.

Surgical treatment may be difficult to achieve because of the frequent recurrence of pain when the pain is unbearable, has not improved or progressed due to paraplegia, or if faded disorder occurs 6 to 12 weeks after conservative treatment. If there is any obstacle to the use of leisure time, it shall be carried out. The main symptom before surgery is lower limb pain caused by neuromuscular stimulation.

Surgical methods include conventional incisional surgery and minimal invasive surgery. Minimally invasive surgery is endoscopic discectomy, laser-assisted disc removal, percutaneous automatization, chemical pulp fusion, Electrotherapy, and decompression using a microscope.

Among them, the machines used for nucleus plasty produce plasma fields only in the local region around wire-like catheters. The ceramic is inserted into the needle and inserted into the disk.

When the needle is properly inserted, the operation is carried out while confirming the X-ray photograph as a video monitor. When it is confirmed that the disk has entered the disk, the machine is turned on to generate a plasma field around the disk and gently move it gently. By doing so, the contents of the disc become buried therein, reducing the volume of the disc and reducing the pressure of pressing the nerve.

Korean Patent Registration No. 1133947 discloses an electrode body and an induction tube capable of controlling the direction for selective removal of body tissue. Patent Document 1133947 discloses a body including a body, a first body provided at one end of the body, A first electrode comprising a cap and a first electrode line connected to another end of the body; An insulator connected to a body of the first electrode and a portion of the first cap and insulating the first electrode and the second electrode; A second electrode including a first ring connected to the insulator and a second electrode line connected to one end of the first ring; And a direction adjuster including a first direction adjusting wire connected to the first electrode or the second electrode, and a flexible body.

Japanese Patent Publication No. 1133947 discloses a method of inserting an electrode body or the like into body tissues to bend a flexible body by pulling a direction adjusting wire to control the direction and position of the electrode body, The procedure can be performed to remove the tissue, and since the occluded solid fibrous material can be easily pierced, there is an advantage that it can be easily performed even in a case where the disc prolapse is fixed for a long time.

However, in the conventional electrode body for nucleation plasty including the patent publication No. 1133947, plasma can be formed in front of the first electrode to easily penetrate the hardened fibrous material, but the direction of the flexible body is adjusted in the disk In the case of removing the tissue, there is a disadvantage that the range of removing the tissue is limited as the plasma is generated in front of the first electrode.

In addition, in the procedure of inserting the electrode body into the fibrous ring to remove the protruding disc, since the plasma is generated from the front side of the first electrode, the plasma proceeds to a state close to the healthy nerve, There was a problem.

(0001) Korean Patent Registration No. 1133947 (Registered on March 30, 2012)

It is an object of the present invention to provide a method for removing the nucleus pulposus in a patient in which the removal of the nucleus pulposus is not restricted to the front side and the nucleus pulposus can be quickly removed in the process of bending and expanding. And a tubular molding machine including the electrode assembly.

According to the present invention, the above object can be accomplished by a method of manufacturing a magnetic resonance imaging apparatus, comprising: a first electrode used in a nucleus pulposus procedure for generating a plasma field to remove a nucleus of an intervertebral disc, A second electrode formed behind the first electrode on the side entering the intervertebral disc; A first insulator formed between the first electrode and the second electrode; A third electrode formed behind the second electrode on the side entering the intervertebral disc; And a second insulator formed between the second electrode and the third electrode, wherein the second electrode is selectively connected to the power source with respect to the first electrode or the third electrode so that the generation shape of the plasma field is changed The present invention relates to an electrode assembly for nucleation plasty.

Wherein the first electrode is formed with a surface area of Al, the second electrode is formed with a surface area of A2, the third electrode is formed with a surface area of A3, and a high current density is formed around the first electrode and the second electrode The A3 may be wider than the A2 and the A2 may be wider than the A1.

The second electrode and the third electrode may be formed in a cylindrical shape, and protrusions may be formed on the outer circumferential surface of the second electrode.

And a deformed body formed behind the third electrode on the side of entering the intervertebral disc and being bent or expanded by being connected to an adjusting wire selectively pulled or deformed in shape according to temperature, And may be connected to the adjustment wire to bend or stretch with the deformable body.

The adjusting wire may be provided with a catching part, and a hooking part may be formed between the second insulator and the deforming part to catch the catching part when the adjusting wire is pulled.

According to the present invention, the above object can be accomplished by a method of manufacturing a magnetic resonance imaging apparatus, comprising: a first electrode used in a nucleus pulposus procedure for generating a plasma field to remove a nucleus of an intervertebral disc, A second electrode formed behind the first electrode on the side entering the intervertebral disc; A first insulator formed between the first electrode and the second electrode; A third electrode formed behind the second electrode on the side entering the intervertebral disc; And a second insulator formed between the second electrode and the third electrode, wherein the third electrode is connected to the power source at the same time as the first electrode and the second electrode. .

The object is achieved according to the invention by an electrode assembly for nucleation plasty; An operating portion formed behind the electrode assembly on a side entering the intervertebral disc and operated by a user to bend or spread the third insulator; And a control unit for connecting the second electrode to the first electrode or the third electrode and the power source, wherein when the third insulator is operated to bend or stretch, the second electrode is connected to the third electrode, And is connected to a power source.

According to the present invention, there are provided a first electrode used in a nucleus pulposus method for generating a plasma field to remove a disc nucleus of an intervertebral disc, A second electrode formed behind the first electrode on the side entering the intervertebral disc; A first insulator formed between the first electrode and the second electrode; A third electrode formed behind the second electrode on the side entering the intervertebral disc; And a second insulator formed between the second electrode and the third electrode, wherein the second electrode is selectively connected to the power source with the first electrode or the third electrode so as to change the generation form of the plasma field, Which is inserted into the region of the fingernail to prevent damage to the healthy nerve even when the region of the fingernail is close to the healthy nerve, and an apparatus for forming a nucleus pulposus comprising the electrode assembly.

And a deformable body formed behind the third electrode on the side entering the intervertebral disc and connected to the operating wire so as to be bent or expanded, and the second insulator is connected to the deformable body by an interlocking wire so as to bend or expand in the same direction as the deformable body Accordingly, it is possible to provide an electrode assembly for nucleation plasty and a nucleus forming machine including the same, in which the nucleus can be quickly removed during the bending and spreading process.

1 is a perspective view showing a nucleus forming machine of the present invention.
Fig. 2 is a view showing an electrode assembly of the tubular molding machine of Fig. 1; Fig.
3 to 5 are views showing the use state of the nucleus forming machine of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

The electrode assembly of the present invention for a nucleation plasty and the nucleus forming machine including the same are capable of rapidly removing the nucleus pulposus in the process of bending and stretching without limiting the range of the nucleus removal to the front side, To prevent damage to the healthy nerve.

FIG. 1 is a perspective view showing a tubular molding machine of the present invention, FIG. 2 is a view showing an electrode assembly of the tubular molding machine of FIG. 1, and FIGS. 3 to 5 are views showing the state of use of the tubular molding machine of the present invention.

1 to 4, when a power source is inserted in a disk (D) disk, the plasma generator molding machine 1 of the present invention includes a plasma chamber P The control unit 30 includes an electrode assembly 10, an operation unit 20, and a control unit 30. The control unit 30 includes an electrode assembly 10, a control unit 30,

The electrode assembly 10 is configured to be inserted into the intervertebral disc D in order to remove the nucleus N of the intervertebral disc D and to generate a plasma field P inside the intervertebral disc D. The electrode assembly 10 is formed in a long cylindrical shape in one direction and includes a first electrode 11, a first insulator 12, a second electrode 13, a second insulator 14, a third electrode 15, A deformable body 16 and a rigid body 17. [

As shown in FIG. 2A, the first electrode 11 is connected to the second electrode 13 and selectively connected to a power source, and is formed on the front side of the intervertebral disc D. The first electrode 11 is formed in a conical shape having a leading end portion at the front and is connected to the first lead E1 in the electrode assembly 10.

As shown in FIG. 3, when the first electrode 11 is connected to the second electrode 13 and the power source, a plasma field P is generated near the tip portion. The principle in which the plasma field P is generated at the tip portion is a well known technique, and a detailed description thereof will be omitted.

2A, the first conductor E1 electrically connects the first electrode 11 and the control unit 30, and is electrically insulated from the other structures inside the electrode assembly 10. As shown in FIG.

The second electrode 13 is connected to the first electrode 11 or the third electrode 15 and selectively connected to the power source. The second electrode 13 is formed behind the first electrode 11 on the side entering the intervertebral disc D. Although not shown in detail, the second electrode 13 is formed into a hollow cylindrical shape and connected to the second lead E2 inside the second electrode 13.

2A, the second conductor E2 electrically connects the second electrode 13 and the control unit 30, and is electrically insulated from the other structures inside the electrode assembly 10. As shown in FIG.

The first insulator 12 has a structure for insulating the first electrode 11 and the second electrode 13 from each other and is formed of a material having insulation property so that the first electrode 11 and the second electrode 13 . Both ends of the first insulator 12 are joined to the first electrode 11 and the second electrode 13.

As shown in FIG. 2A, the third electrode 15 is connected to the second electrode 13 and selectively connected to a power source. The third electrode 15 is formed behind the second electrode 13 on the side entering the intervertebral disc D. Although not shown in detail, the third electrode 15 is formed into a hollow cylindrical shape, and is connected to the third lead E3 inside the third electrode 15.

The third conductor E3 electrically connects the third electrode 15 and the control unit 30 and is electrically insulated from the other structures inside the electrode assembly 10. [

The second insulator 14 has a structure for insulating the second electrode 13 and the third electrode 15 from each other and is formed of a material having an insulating property and is provided between the second electrode 13 and the third electrode 15 do. Both ends of the second insulator 14 are coupled to the second electrode 13 and the third electrode 15.

1, the control unit 30 controls the second wire E2 according to the user's operation (the first button B1 of the operation unit 20) as the first wire E1 or the third wire E3 ) And the power source. The circuit technology for switching the electrical contacts is well known in the art and a detailed description thereof will be omitted. The control unit (30) is installed inside the operation unit (20).

When the second electrode 13 is selectively connected to the first electrode 11 or the third electrode 15, the generation of the plasma field P is changed.

3, when the second electrode 13 is connected to the first electrode 11 and the power source, a high current density is formed around the tip of the first electrode 11, so that the plasma field P is concentrated As shown in FIG. 4, when the second electrode 13 is connected to the third electrode 15 and the power source, a high current density is formed around the outer circumferential surface of the second electrode 13, .

This is due to the shape and surface area of the first electrode 11, the second electrode 13, and the third electrode 15. That is, the first electrode 11 is formed at the surface area of A1, the second electrode 13 is formed at the surface area of A2, and the third electrode 15 is formed at the surface area of A3, A3 is made larger than A2 and A2 is made larger than A1 so that a high current density is formed around the second electrode 13 and the second electrode 13. [

3, when the electrode assembly 10 moves straight from the intervertebral disc D to a position for removing the nucleus N or the fibrous tissue A, the electrode assembly 10 is moved in front of the moving direction, that is, The second electrode 13 is connected to the first electrode 11 and the power source so that the plasma field P is generated at the tip end portion and the deformable body 16 is bent or expanded to form the nucleus N The third electrode 15 is connected to the second electrode 13 and the power source so that a plasma field P is generated around the second electrode 13. [

Conventionally, in the case where the electrode assembly enters the ruptured fibrous frame side to remove the nucleus pulposus or the fibrous tissue, or when the deformable body is bent or expanded while removing the nucleus pulposus, the tip of the electrode assembly in which the plasma field occurs is adjacent to the normal fibrous tissue nerve root There was a problem of damage to the normal fibrous nerve root (R).

4, when a plasma field P is generated in the vicinity of the second electrode 13, the electrode assembly 10 enters the ruptured fibrous structure A side, and the nucleus N or the fibrous structure A Even if the first electrode 11 is in contact with the normal fiber cortex A or the nerve root R in the case where the deformable body 16 is bent or stretched and the receptacle N is removed, There is an advantage that the damage of the nerve root (R) is prevented.

When the plasma field P is generated around the second electrode 13 when the deformable body 16 is bent or expanded to remove the nucleus N, when the plasma field P is generated at the tip portion As the size of the plasma field P generated through the nucleus N increases, the nucleus N can be removed more quickly than when the plasma field P occurs at the tip.

As shown in FIG. 2B, a protrusion 13a may be formed on the outer circumferential surface of the second electrode 13. When the protrusion 13a is formed on the outer circumferential surface of the second electrode 13, a high current density is formed around the protrusion 13a, so that the plasma field P is intensively generated. The protrusions 13a may be linearly formed along the longitudinal direction of the electrode assembly 10, or may be formed annularly along the circumferential direction.

The deformable member 16 is configured to move the position of the plasma field P in the intervertebral disc D and the third electrode 15 on the side entering the intervertebral disc D, Respectively. The deformable body 16 is formed into a hollow cylindrical shape and is made of a flexible material. The deformable body 16 is connected to the adjusting wire W in the inside thereof.

As shown in Fig. 2C, the adjusting wire W is a structure which is selectively pulled so that the deformable body 16 can be bent or unfolded. Preferably, a pair of the first adjusting wire W1, (W2)), and the other ends are coupled to each other on the inner circumferential surface of the deformable body (16). A passing portion 16a through which the first adjusting wire W1 and the second adjusting wire W2 are passed is formed on the inner peripheral surface of the deformable body 16 so that the first adjusting wire W1 and the second adjusting wire W2 do not flow Are formed on opposite sides along the longitudinal direction.

Although not shown in detail, the other end of the first adjusting wire W1 and the second adjusting wire W2 are connected to a motor (not shown) in the inside of the operating portion 20, (Not shown).

When the first adjusting wire W1 is wound around the motor-driven steerable pulley and pulled toward the operating portion 20, the side of the deformable member 16 to which the first adjusting wire W1 is engaged is compressed by the compressive force, When the wire W2 is wound on the reverse rotation of the motor and pulled toward the operating portion 20, the side of the deformable body 16 on which the second adjusting wire W2 is engaged is compressed by the compressive force.

When the first adjusting wire W1 is pulled out, the second adjusting wire W2 is released, and when the second adjusting wire W2 is pulled, the first adjusting wire W1 is released, The first adjusting wire W1 and the second adjusting wire W2 intersect with each other at the side where the first adjusting wire W1 is coupled and the second adjusting wire W2 is coupled, And the operation of bending and unfolding to the adjustment wire W2 side is repeated (see Fig. 4).

Although not shown, the adjusting wire W may be formed of a shape memory alloy whose shape is deformed according to the temperature. A technique for bending or stretching a deformable body by a shape memory alloy is disclosed in Korean Patent Publication No. 849228, and a detailed description thereof will be omitted.

The second insulator 14 may be connected to the adjusting wire W together with the deformable body 16 to be bent or stretched together with the deformable body 16 as shown in Figs. The second insulator 14 is made of a flexible material. The second insulator 14 is connected to the adjusting wire W in the inside thereof.

2d, one end of the adjusting wire W is coupled to the inner circumferential surface of the second insulator 14 opposite to the other, and the inner circumferential surface of the deformable member 16 is provided with a first adjusting wire W1 and a second adjusting wire W2, And a passing portion 16a through which the wafer W2 passes are formed opposite to each other along the longitudinal direction.

The stopper portion Wa is formed in the adjustment wire W and the stopper portion 14a in which the stopper portion Wa is caught is drawn between the second insulator 14 and the deformable body 16 when the adjustment wire W is pulled, . A through hole (not shown) through which the adjusting wire W passes is formed in the engaging portion 14a. Of course, the latching portion 14a maintains the shape of the partition wall within a range that does not interfere with the first conductor E1, the second conductor E2 and the third conductor E3.

The stopper portion Wa is caught by the rim of the through hole when the adjusting wire W is pulled toward the operation portion 20, thereby limiting the amount of deformation of the second insulator 14. That is, when the first adjusting wire W1 or the second adjusting wire W2 is wound around the motor-driven rotating pulley and pulled toward the operating portion 20, the second insulator 14 is moved in the direction of the engaging portion 14a, The length of the first adjusting wire W1 or the length of the second adjusting wire W2 is contracted by the amount of movement of the first adjusting wire W1 or the second adjusting wire W2.

When the second insulator 14 is connected to the adjustment wire W together with the deformable body 16 and bent or stretched with the deformable body 16 as shown in Figs. 2d and 5, the deformable body 16 is bent The distance between the second electrode 13 and the third electrode 15 is shortened in the moving direction of the electrode assembly 10 so that the length of the plasma field P in the moving direction of the electrode assembly 10 is shortened, (N) is more rapidly removed.

As shown in Figures 1 and 2a, the rigid body 17 is formed at the rear of the deformable body 16 so that the deformable body 16 remains rigid without being deformed during bending or stretching. The rigid body 17 is formed into a hollow cylindrical shape so that the first conductor E1, the second conductor E2, the third conductor E3 and the adjusting wire W pass through the inside thereof.

As shown in FIG. 1, the tubular molding machine 1 of the present invention preferably further includes a receiver 18 in which the electrode assembly 10 is received or drawn.

The receptacle 18 is formed into an empty cylindrical shape so that the electrode assembly 10 is accommodated. One end of the receiver 18 is coupled to the operating unit 20 and the other end of the receiver 18 is formed with an opening through which the electrode assembly 10 is drawn or drawn. The electrode assembly 10 enters the intervertebral disc D while being drawn into the receptor 18 and is drawn out through the opening in the intervertebral disc D. [ 3 to 5, the receptor 18 is not shown for easier understanding.

As shown in Fig. 1, the operating portion 20 is formed at the back of the electrode assembly 10, as a structure for holding the electrode assembly 10 by the operator. The manipulation part 20 is configured so that the operator can grasp the manipulator with one hand. In the embodiment of the present invention, the operation unit 20 is shown as a handle, but the shape of the operation unit 20 is not limited thereto, and may be various types such as a gun shape.

The operation unit 20 includes a first button B1 and a second button B2.

The control unit 30 detects the operation of the first button B1 and the second button B2 and pushes the second wire E2 to the first wire E1 or the third wire E2 when the operator presses the first button B1, The control unit 30 controls the forward and reverse rotation of the motor for pulling the adjustment wire W when the operator presses the second button B2.

The control unit 30 may automatically connect the third electrode 15 with the second electrode 13 when the deformable body 16 is operated to bend or expand.

When the operator manipulates the first button B1 so that the deformable body 16 is bent or stretched in the state where the plasma field P is generated in the vicinity of the first electrode 11, the operator presses the second button B2 separately The control section 30 automatically connects the third electrode 15 with the second electrode 13 so that the deformed body 16 is bent and a plasma field P is formed in the vicinity of the second electrode 13, (N) can be removed quickly, and thus the hassle of button operation can be solved.

As shown in FIG. 1, the first button B1 and the second button B2 are formed on the operation unit 20, respectively.

The first button B1 is formed at a position where the thumb is touched on both sides and the second button B2 is formed at a position where the index finger touches the both sides of the second button B2. The electrode assembly 10 can be controlled through the first button B1 and the second button B2 formed by two pieces, respectively, even if the operation unit 20 is held in a state of being oriented toward the opposite direction. Of course, the position, shape, and operation manner (button type, wheel type, lever type) of the first button B1 and the second button B2 can be variously modified.

The second electrode 13 may be connected to the power source at the same time as the first electrode 11 and the third electrode 15. The second electrode 13 is formed to have a larger surface area than the first electrode 11 but has a surface area smaller than that of the third electrode 15 so that a plasma field is formed around the first electrode 11 and the second electrode 13. [ (P) is generated, and at the same time, the nucleus N of the intervertebral disc D is removed.

Although not shown, the third electrode 15 may be connected to the power source at the same time as the first electrode 11 and the second electrode 13. The third electrode 15 is formed to have a larger surface area than the first electrode 11 and the second electrode 13 so that a plasma field P is formed around the first electrode 11 and the second electrode 13 And at the same time the nucleus N of the intervertebral disc D is removed.

According to the present invention, a first electrode 11 used in a nucleus pulposus method for generating a plasma field P to remove a nucleus N of an intervertebral disc D and formed at the front of the disc D; A second electrode 13 formed behind the first electrode 11 on the side entering the intervertebral disc D; A first insulator 12 formed between the first electrode 11 and the second electrode 13; A third electrode 15 formed behind the second electrode 13 on the side entering the intervertebral disc D; And a second insulator 14 formed between the second electrode 13 and the third electrode 15. The second electrode 13 may be formed on the first electrode 11 or the second electrode 14 so that the generation shape of the plasma field is changed. The third electrode 15 and the power source are selectively connected to the power source so that the range of removal of the nucleus N is not limited to the front side but the healthy nerve is prevented from being damaged even if it is inserted into the fibrous tissue portion A, It is possible to provide an electrode assembly 10 for a nucleation plasty and a nucleus forming machine 1 including the same.

And a deformable body 16 formed behind the third electrode 15 on the side of entering the intervertebral disc D and connected to the operation wire so as to be bent or expanded, and the second insulator 14 comprises a deformable body 16, The electrode assembly 10 for plunging the plunger N in such a manner that the plunger N can be quickly removed in the process of bending and expanding as the plunger 16 is connected to the deformable member 16 by the interlocking wire so as to bend or expand in the same direction as the electrode assembly 10, It becomes possible to provide the nucleus forming machine 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

1: Nuclear molding machine P: Plasma sheet
10: electrode assembly D: disc (disc)
20: operating part N: nucleus pulposus
30: Control section A:
11: first electrode R: nerve root
12: first insulator E1: first conductor
13: second electrode E2: second conductor
13a: protrusion E3: third conductor
14: second insulator W: adjusting wire
14a: Retaining part W1: First adjusting wire
15: third electrode W2: second adjusting wire
16: Modified Wa:
16a:
B1: First button
B2: Second button

Claims (7)

It is used for nucleoplasty that removes the nucleus of the disc by generating a plasma field,
A first electrode formed on the front side of the side entering the intervertebral disc;
A second electrode formed behind the first electrode on the side entering the intervertebral disc;
A first insulator formed between the first electrode and the second electrode;
A third electrode formed behind the second electrode on the side entering the intervertebral disc; And
And a second insulator formed between the second electrode and the third electrode,
Wherein the second electrode is selectively connected to the power source with respect to the first electrode or the third electrode so that the generation shape of the plasma field is changed. The method according to claim 1,
The first electrode is formed by the surface area of Al,
The second electrode is formed with the surface area of A2,
The third electrode is formed as a surface area of A3,
Wherein A3 is wider than A2 and A2 is wider than A1 so that a high current density is formed around the first electrode and the second electrode. 3. The method of claim 2,
The second electrode and the third electrode are formed in a cylindrical shape,
And a protrusion is formed on an outer circumferential surface of the second electrode. The method according to claim 1,
And a deformed body which is formed behind the third electrode on the side of entering the intervertebral disc and is bent or stretched in connection with an adjusting wire selectively pulled or deformed according to temperature,
Wherein the second insulator is connected to the adjustment wire together with the deformable body to bend or stretch with the deformable body. 5. The method of claim 4,
The adjusting wire is provided with an engagement protrusion,
And an engaging portion is formed between the second insulator and the deformable member to engage the engaging protrusion when the adjusting wire is pulled. It is used for nucleoplasty that removes the nucleus of the disc by generating a plasma field,
A first electrode formed on the front side of the side entering the intervertebral disc;
A second electrode formed behind the first electrode on the side entering the intervertebral disc;
A first insulator formed between the first electrode and the second electrode;
A third electrode formed behind the second electrode on the side entering the intervertebral disc; And
And a second insulator formed between the second electrode and the third electrode,
Wherein the third electrode is connected to the power source at the same time as the first electrode and the second electrode. An electrode assembly for nucleation plasty according to claim 4;
An operating portion formed behind the electrode assembly on a side entering the intervertebral disc and operated by a user to bend or spread the third insulator; And
And a control unit for connecting the second electrode to the first electrode or the third electrode and a power source,
Wherein the control unit connects the second electrode to the third electrode and the power source when the third insulator is operated to bend or expand.

Images