KR102227910B1 - Multiple electrode wire and system containing the same - Google Patents

Abstract

The multi-electrode wire according to the present invention includes a central wire extending from one end of the multi-electrode wire through the center to the other end inserted toward the cerebrovascular vessel; A conical tip electrode disposed at the other end of the multi-electrode wire, connected to the center wire, and tapered in a form in which a cross-sectional area decreases in a forward direction from a portion connected to the center wire; And a cover member covering an outer circumferential surface of the central wire, and a fluid electrode unit disposed in one region of the cover member to provide an electrode for measuring a current flowing through the blood vessel wall.

Description

Multi-electrode type wire and monitoring system including the same {MULTIPLE ELECTRODE WIRE AND SYSTEM CONTAINING THE SAME}

The present invention relates to a multi-electrode type wire and a monitoring system including the same, and more particularly, to a multi-electrode type wire inserted into a cerebrovascular vessel and used for diagnosis of epilepsy and localization of an epileptic region, and a monitoring system including the same. .

EEG monitoring is a technique for finding epileptic waves by using the phase difference of electrical signals in the cerebral cortex. The greater the number of electrodes that can be used, the more helpful the localization of the lesion. As such, EEG monitoring is important for diagnosing epilepsy and localization of epileptic sites, and is particularly important for determining the possibility of surgery and surgical site prior to epilepsy surgery.

Meanwhile, iEEG (intracranial electroencephalography) is being used as an electroencephalogram monitoring technique to further localize epileptic lesions prior to epilepsy surgery. iEEG is a method of directly contacting the monitoring electrode on the cerebral cortex, which is helpful in diagnosing epilepsy and localizing the area, but there is a limitation in that the monitoring process is invasive.

In this regard, registration utility model No. 20-0278501 (hereinafter referred to as prior literature) discloses a deep-brain electrode made of gold for diagnosis of epileptic lesions. Although the prior literature induces contact of blood vessels at various locations through a plurality of metal plates, there is a problem in that the electrode is not in contact with the inner wall of the blood vessel by fluidly changing the location.

Korean Utility Model Registration No. 20-0278501

The technical problem of the present invention is conceived in this respect, and an object of the present invention is to provide a multi-electrode type wire including a plurality of electrodes inserted into a blood vessel and capable of contacting various areas, and a monitoring system including the same.

In addition, another object of the present invention is to provide a multi-electrode type wire for independently collecting current sensed from an electrode in contact with a plurality of points inside a blood vessel wall, and a monitoring system including the same.

According to an embodiment of the present invention, a multi-electrode wire that is inserted into the cerebrovascular vessel and measures the current flowing in the cerebrovascular vessel extends from one end of the multi-electrode wire through the center to the other end inserted into the cerebrovascular vessel and is disposed. A central wire for transmitting the current measured in the cerebrovascular system to the outside; A conical tip electrode disposed at the other end of the multi-electrode wire, connected to the center wire, and tapered in a form in which a cross-sectional area decreases in a forward direction from a portion connected to the center wire; And a cover member that covers the outer circumferential surface of the central wire and is separated into a predetermined section along the circumferential direction of the central wire, and is disposed in a region of the cover member to flow through the blood vessel wall when the cover member is spaced apart from the central wire. It includes; an electrode for measuring a current, provided, and a flexible electrode unit for independently transmitting the current measured by the electrode.

In addition, the flowable electrode part may include a pair of cover members partitioned upward and downward based on the center wire.

In addition, the flowable electrode part may include four cover members partitioned in upper left, lower left, upper right, and lower right directions based on the center wire.

In addition, the flowable electrode unit may include a non-conducting end connected to the tip electrode and extending along the center wire by a predetermined distance and coupled to the tip end of the cover member.

In addition, a plurality of the non-conductor ends may extend from the tip electrode to different lengths, and the cover member may have different lengths according to the lengths in which the plurality of non-conductor ends are extended.

In addition, the non-conductor end includes an electromagnet that is supplied with a current when coupled with the cover member to exhibit magnetism, wherein the cover member is turned into the electromagnet when the flowable electrode unit enters a region where current measurement is required. By blocking the supplied current, the magnetism of the electromagnet can be released and separated from the center wire.

In addition, the flowable electrode part has a passage through the inner side, and when entering a region where current measurement is required, a fine wire passing through the passage is exposed to contact the inner wall of the cerebrovascular vessel to measure the current. have.

In addition, when the current measurement is finished, the cover member may move to a position covering the center wire according to the movement of the fine wire.

In addition, the center wire may be formed with a thin film cover for blocking contact with blood contained in the cerebrovascular vessel when the flowable electrode is separated from each other.

In addition, a monitoring system including a multi-electrode type wire according to an embodiment of the present invention includes a multi-electrode type wire; And a central processing unit for synthesizing current information transmitted from the multi-electrode type wire and detecting an epileptic wave using a phase difference of the current information.

In the multi-electrode wire according to the present invention, the tip electrode and the electrode disposed on the cover member are in contact with the blood vessel wall at different points on one central wire to measure the current, and the current measured from each electrode is independently transmitted, thereby providing a highly reliable current. Information can be obtained.

In addition, the multi-electrode wire according to the present invention has the advantage that the electrode can be easily adhered to the vessel wall regardless of the shape or state of the blood vessel by opening the cover member apart from the center wire.

In addition, the monitoring system including the multi-electrode wire according to the present invention can localize the epileptic region in more detail by analyzing the phase of each position of the current by transferring the current measured in different areas to the central processing unit outside the body.

1 is a perspective view of a multi-electrode type wire according to an embodiment of the present invention.
2 is a cross-sectional view of the multi-electrode type wire of FIG. 1.
3 to 6 are views showing an example of a multi-electrode type wire in which the flowable electrode portion is modified.
7 is a cross-sectional view of a multi-electrode wire according to another embodiment of the present invention.
8 is a perspective view of the multi-electrode wire of FIG. 7.
9 is a schematic diagram of a monitoring system including a multi-electrode wire according to an embodiment of the present invention.

For detailed description of the present invention to be described below, reference is made to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it should be understood that the location or arrangement of individual components in each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if appropriately described, is limited only by the appended claims, along with all ranges equivalent to those claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions over several aspects.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings.

In the multi-electrode wire according to the present invention, the tip electrode and the electrode disposed on the cover member are in contact with the blood vessel wall at different points on one central wire to measure the current, and the current measured from each electrode is independently transmitted, thereby providing a highly reliable current. Information can be obtained. As such, the multi-electrode type wire according to the present invention is inserted into the cerebrovascular vessel, and the current flowing in the cerebrovascular vessel can be measured.

1 is a perspective view of a multi-electrode type wire according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the multi-electrode type wire of FIG. 1.

1 and 2, a multi-electrode type wire 10 according to an embodiment of the present invention may include a center wire 13, a tip electrode 11, and a flowable electrode unit 15.

The center wire 13 may be disposed extending from one end of the multi-electrode type wire 10 to the other end inserted into the cerebrovascular vessel through the center. The center wire 13 may transmit the current measured in the cerebrovascular blood vessels to the outside. In detail, the central wire 13 includes a conductive material and may transmit the current measured by the tip electrode 11 to an external device such as a central processing unit, which will be described later. The central wire 13 may be provided with a material that can be easily bent according to the shape of the blood vessel. The central wire 13 is

In addition, the center wire 13 may be formed with a thin film cover 131 for blocking contact with blood accommodated in the blood vessel when the flowable electrode unit 15 is separated from each other. The thin film cover 131 may be formed of a material harmless to the human body. The flowable electrode part 15 and the center wire 13 can be physically separated through the thin film cover 131, through which the current measured by the tip electrode 11 and the electrode 153 disposed on the cover member 151 The current measured in) can be transmitted to the outside through a different path.

The tip electrode 11 may be disposed at the other end of the multi-electrode type wire 1 to be connected to the center wire 13. The tip electrode 11 may have a tapered conical shape in a form in which a cross-sectional area decreases in a forward direction from a portion connected to the center wire.

In detail, the tip electrode 11 may have a streamlined tip in order to easily insert the multi-electrode wire 10 into a blood vessel. In addition, since the tip electrode 11 has an inclined tip, the path can be easily changed inside the blood vessel, and the multi-electrode wire 10 can be guided without being disturbed by impurities such as blood clots or bending formed in the blood vessel wall. .

In addition, a conductive material may be disposed on the outer surface of the tip electrode 11. Through this, when the tip electrode 11 contacts the blood vessel wall, the current flowing from the blood vessel wall can be sensed, and this can be transmitted to the outside through the center wire 13. The conductive material disposed on the tip electrode 11 may be provided in various forms, such as covering the entire outer circumferential surface or disposed in a patterned form to have a certain rule on a part or the entire area of the outer circumferential surface.

The flexible electrode unit 15 may include a cover member 151 and an electrode 153. The flexible electrode unit 15 may independently transmit the current measured by the electrode 153. That is, one or a plurality of electrodes may be disposed on a single cover member, and current measured by each cover member may be transmitted to the outside through an independent path. To this end, the flowable electrode unit 15 and the cover member 151 may cover the outer circumferential surface of the central wire 13 and may be separated into predetermined partitions along the circumferential direction of the central wire 13.

As an example, the flowable electrode unit 15 may include a pair of cover members partitioned upward and downward based on the center wire 13. Referring to the cross-section of the multi-electrode wire 10 shown in FIG. 2, the fluid electrode unit 15 includes a cover member included in the upper fluid electrode unit 15a and a cover member included in the lower fluid electrode unit 15b. It may include. Each of the cover members of the upper flowable electrode portion 15a and the lower flowable electrode portion 15b may be provided with electrodes that independently measure current. In addition, each of the flexible electrode units 15a and 15b can be driven independently. That is, each of the fluent electrode units 15a and 15b separated up and down based on the center wire 13 can measure the current in the vessel wall at different locations, and through this, the current is measured at various locations. Basic data for localization can be easily collected.

As another example, the flowable electrode unit 15 may include four cover members partitioned in upper left, lower left, upper right, and lower right directions with respect to the center wire 13. A description related to the embodiment will be described in detail with reference to FIG. 7 below.

As such, the flexible electrode unit 15 and the cover member 151 may be divided into various shapes, and an example in which the cover member is divided is not limited to the above-described example, and may be divided into various shapes according to design variations.

In addition, the cover member 151 may be limitedly deformed into a predetermined shape including a shape memory material. In detail, the multi-electrode wire may be inserted into a blood vessel while intubated into the catheter. In this case, the catheter accommodating the multi-electrode wire at the position where the current measurement is required may be removed rearward, and the tip of the cover member in contact with the center wire may be deformed into a set shape by the catheter. The shape of the set tip may be in various shapes such as a hook shape and a sine wave shape, and a cover member with a shape of the tip set in various shapes according to the location of the cover member and the structure of the vessel wall may be used. Meanwhile, separation of the central wire and the cover member occurs through the deformation of the tip of the cover member, and the current flowing in the vessel wall can be measured through the electrode attached to the cover member.

The electrode 153 may be disposed in one area of the cover member 151. The electrode 153 may measure the current flowing through the blood vessel wall when the cover member 151 is spaced apart from the center wire 13.

For example, as shown in FIG. 1, an electrode may be disposed at the tip of the cover member 151. In this case, the tip of the cover member 151 separated from the center wire 13 may contact the blood vessel wall. The electrode 153 disposed at the tip of the cover member 151 may measure current in the blood vessel wall and transmit it to the outside.

Hereinafter, a modified example of the flowable electrode will be described in detail with reference to FIGS. 3 to 6.

3 to 6 are views showing an example of a multi-electrode type wire in which the flowable electrode portion is modified.

3 to 6, the electrode 153 may be disposed on one side of the cover member 151 that does not contact the center wire 13. That is, in preparation for a case where the cover member 151 is separated from the central wire 13 and the outer surface of the cover member 151 moves toward the blood vessel, an electrode may be installed in one region of the side surface.

In detail, as shown in FIG. 3, an electrode continuously formed along a path on the side may be formed. In addition, electrodes may be continuously formed in a plurality of paths to form various contact areas. In this case, according to the bending or deformation of the cover member 151, various contact surfaces may be formed with the blood vessel wall, and at the same time, the area of the electrode contacting the blood vessel wall may be increased. On the other hand, currents measured by a single or a plurality of electrodes disposed on a single cover member may be merged into the same path and transmitted to the outside.

As another example, as shown in FIG. 4, an electrode patterned with a conductive object may be disposed in some of the deformable regions of the cover member 151. The electrodes patterned on the side surfaces of the cover member 151 may be merged in the same path, and the measured current may be transmitted to the outside through a single path.

That is, when the electrode is disposed at the tip of the cover member 151, the current can be measured only when the tip and the blood vessel wall are in contact, but the electrode is continuously formed or patterned along the side as shown in FIGS. 3 and 4. In the case where the cover member 151 is deformed, the curved point contacts the blood vessel wall, so that the convenience of current measurement may be improved.

As another example, as shown in FIG. 5, the flowable electrode unit 15 may have a passage through the inner side. When the flowable electrode unit 15 enters a region in which current measurement is required, the fine wire 157 passing through the passage is exposed to contact the inner wall of the cerebrovascular vessel, thereby measuring the current.

In detail, each of the cover members 151 of the flowable electrode unit 15 may have a passage through the inner side, and a fine wire 157 may be inserted through the passage to be exposed to the tip. The fine wire 157 may include an electrode for measuring current. The shape of the electrode included in the fine wire 157 may vary, such as the above-described single point shape, patterned line shape, and surface shape covering the wire. In addition, the fine wire 157 may include an independent path connected to the electrode, and may transmit current through a path different from that of the electrode disposed on the cover member 151.

On the other hand, as the fine wire 157 is exposed, the position at which the current is measured can be easily changed without changing the position of the multi-electrode type wire 10. That is, the position of the multi-electrode type wire 10 can be changed in a fixed state, and the degree of exposure of the fine wire 157 can be changed, and through this, the area in which the current can be measured at a single position can be expanded, so that the convenience of operation can be improved. .

In addition, when the measurement of the current through the fine wire 157 is terminated, the cover member 151 moves to a position covering the central wire according to the movement of the fine wire 157, and the tip ends with the non-conductor end 155 Can be combined. That is, the fine wire 157 may be exposed from the cover member 151 to assist in restoring the cover member 151 in addition to a function of measuring the current.

In addition, as shown in FIG. 6, the length of the cover member constituting each of the movable electrode portions 15a and 15b may be formed to be the same. In this case, the length of the non-conductor end 155 may be formed equal to the length of each cover member. In addition, each of the flexible electrode units 15a and 15b may selectively include an electrode of the shape shown in FIGS. 3 to 5.

As such, the flowable electrode unit 15 can improve the measurement range of the current by changing the length of the cover member. In addition, the flowable electrode unit 15 can improve the contact area with the blood vessel wall by changing the arrangement shape of the electrode. In addition, by exposing the fine wire through the flexible electrode unit 15, it is possible to easily measure the current even in a region where access to the cover member is restricted.

Referring back to FIGS. 1 and 2, the flowable electrode unit 15 may include a non-conductor end 155. The non-conductor end 155 may be connected to the tip electrode 11. The non-conductor end 155 may extend along the center wire 13 by a predetermined distance. The non-conductor end 155 may be coupled to the front end of the cover member 151.

In detail, the non-conductor end 155 may be defined as a region that is not separated from the center wire 13. The non-conductor end 155 does not measure current when in contact with the blood vessel wall, and may be provided to physically separate the tip electrode 11 from the electrode disposed on the cover member 151. When the multi-electrode wire 10 moves inside the blood vessel, the non-conductor end 155 and the front end of the cover member 151 are coupled to prevent unnecessary separation of the cover member 151 from the center wire 13. .

Meanwhile, a plurality of non-conductor ends 155 may extend from the tip electrode 11 to different lengths. In this case, the cover member 151 may be formed to have a different length according to the length in which the plurality of non-conducting ends 155 are extended.

That is, the non-conductor end 155 may be formed according to the number of cover members 151 separated from the center wire 13, and the center wire ( The non-conductor end 155 may be formed to cover the outer surface of 13). In detail, as shown in FIG. 1, the two cover members may have different lengths in order to be coupled to the non-conductor ends spaced apart from the tip electrode by different distances. In addition, when four cover members are formed as shown in FIG. 7, each non-conductor end has the same or different length, so that the length of the cover member can be individually adjusted.

In addition, the non-conductor end 155 may include an electromagnet (not shown) that receives current when coupled to the cover member 151 and exhibits magnetism. At this time, the cover member 151 releases the magnetism of the electromagnet by blocking the current supplied to the electromagnet when the flowable electrode unit 15 enters the area where the current measurement is required, and is coupled to the non-conductor end 155 This can be released and spaced apart from the central wire 13.

In detail, in the area where the non-conductor end 155 and the cover member 151 are coupled, a metallic conductor material may be disposed, and a microcurrent is supplied from the outside to the cover member 151 to the electromagnet of the non-conductor end 155. Magnetism may occur. The magnetism generated at the non-conductor end 155 can be combined with the metallic conductor material disposed on the cover member 151 to prevent separation of the cover member 151, and the inspector can use a multi-electrode type wire in the area where current measurement is required. When (10) is located, the magnetism of the electromagnet can be released by blocking the supplied current. Thereafter, the magnetic coupling between the non-conductor end 155 and the cover member 151 is released, and the cover member 151 may be spaced apart from the center wire 13.

Hereinafter, a multi-electrode type wire of an example different from the example shown in FIGS. 1 and 2 will be described in detail with the drawings. In the following examples, descriptions overlapping with those illustrated in FIGS. 1 and 2 will be omitted.

7 is a cross-sectional view of a multi-electrode wire according to another embodiment of the present invention, and FIG. 8 is a perspective view of the multi-electrode wire of FIG. 7.

7 and 8, in the multi-electrode type wire according to another exemplary embodiment of the present invention, the flexible electrode part 25 may be separated in four directions based on the center wire 23. In detail, the flowable electrode part 25 may be divided into upper left, lower left, upper right, and lower right directions based on the center wire 23 and divided into four parts 25a, 25b, 25c, and 25d. In this case, the number of points at which the current can be measured at the same time is improved compared to the examples shown in FIGS. 1 and 2, and thus, it is possible to shorten the inspection required. Each of the cover members separated in four directions may be independently changed in position through a fine wire, and inspection may be performed in a state in which some of the cover members are recombined with the central wire 23 as needed.

In addition, each of the flowable electrode portions 25a, 25b, 25c, and 25d separated in four directions may be formed to have different lengths or may be formed to have the same length. Accordingly, the non-conducting end 255 may be formed to be separated by a different or the same length according to the length of each of the movable electrode portions 25a, 25b, 25c, and 25d. In addition, various types of electrodes may be disposed on the side or tip of each of the movable electrode units 25a, 25b, 25c, and 25d, and various types of electrodes are provided in a combination according to design variations, so that the current of blood vessels is reduced. Can be measured.

In particular, each of the movable electrode portions 25a, 25b, 25c, and 25d can measure the current of the blood vessel wall at different positions. In particular, in a state in which the multi-electrode wire is inserted into the cerebrovascular vessel, EEG can be measured in different regions. In detail, the first electrode portion 25a may be extended to a region adjacent to the tip electrode 21, and the second electrode portion 25b may be extended by a predetermined distance to the rear of the first electrode portion 25a. Similarly, the third electrode portion 25c is extended by a predetermined distance to the rear of the second electrode portion 25b, and the fourth electrode portion 25d is separated by a predetermined distance to the rear of the third electrode portion 25c. Can be extended. In this way, as each of the flexible electrode units 25a, 25b, 25c, and 25d expands to a location spaced apart by a certain distance, the EEG can be measured at different locations. It can be found by further localizing the location where the EEG is measured.

As such, in order to reduce the time required for the inspection, the cover member may be divided into various shapes and separated. In addition, a fine wire is additionally inserted to control each of the separated cover members, so that the convenience of inspection may be improved.

In addition, when a large amount of blood clots are accumulated in the blood vessel or the blood vessels are branched, and the space inside the blood vessel is narrow, and the insertion of the multi-electrode wire is restricted, current is transmitted through the finely divided cover member and the fine wire exposed from the cover member. Can be measured.

Hereinafter, a monitoring system including a multi-electrode type wire according to an embodiment of the present invention will be described. In the following description, overlapping parts related to the configuration and characteristics of the multi-electrode wire will be omitted, and a description of the monitoring system including the multi-electrode wire will be additionally described.

9 is a schematic diagram of a monitoring system including a multi-electrode wire according to an embodiment of the present invention.

Referring to FIG. 9, a monitoring system 1 including a multi-electrode type wire according to an embodiment of the present invention includes a multi-electrode type wire 10 and a central processing unit 17. Hereinafter, the description related to the multi-electrode type wire 10 is replaced by the above-described description, and the central processing unit 17 that processes information transmitted from the multi-electrode type wire 10 will be described in detail.

The central processing unit 17 may synthesize current information transmitted from the multi-electrode type wire 10. The central processing unit 17 may detect the epileptic wave by using the phase difference of the current information. The central processing unit 17 may find an epileptic wave using a phase difference of current information transmitted from the multi-electrode wire 10.

In detail, the phase of each current independently transmitted through the plurality of electrodes may be grasped, and an epileptic wave may be found using a difference in the corresponding phase. That is, it is possible to check whether or not epileptic waves are generated by calculating waveforms through currents measured at various locations and comparing the result of amplifying them with EEG data representing periodic waveforms. In addition, the central processing unit 17 can intuitively output the position of the electrode representing the phase above the threshold value by matching the area where the EEG is collected with a 2D or 3D image, through which epilepsy or brain lesion is expected. The area can be localized in more detail.

As described above, the multi-electrode wire according to the present invention has the advantage that the electrode can be easily adhered to the blood vessel wall regardless of the shape or state of the blood vessel by opening the cover member apart from the center wire.

In addition, the monitoring system including the multi-electrode wire according to the present invention can localize the epileptic region in more detail by analyzing the phase of each position of the current by transferring the current measured in different areas to the central processing unit outside the body.

Although the present invention has been described in detail through exemplary embodiments above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of the present invention is limited to the described embodiments and should not be defined, and should be determined by all changes or modifications derived from the claims and the concept of equality as well as the claims to be described later.

1: monitoring system
10: multi-electrode type wire
11, 21: tip electrode
13, 23: center wire
131: thin film cover
15, 25: fluid electrode part
151, 251: cover member
153, 253: electrode
155, 255: non-conducting group
157: fine wire
17: central processing unit

Claims (10)

In the multi-electrode type wire that is inserted into the cerebrovascular vessel and measures the current flowing in the cerebrovascular vessel,
A central wire extending from one end of the multi-electrode type wire to the other end inserted into the cerebrovascular vessel through the center and transmitting the current measured in the cerebrovascular vessel to the outside;
A conical tip electrode disposed at the other end of the multi-electrode wire, connected to the center wire, and tapered in a form in which a cross-sectional area decreases in a forward direction from a portion connected to the center wire; And
A cover member that covers the outer circumferential surface of the central wire and is separated into a predetermined section along the circumferential direction of the central wire, and a current flowing through the vessel wall when the cover member is spaced apart from the central wire by being disposed in a region of the cover member Including; providing an electrode for measuring, and a fluid electrode unit for independently transmitting the current measured by the electrode; and
The central wire,
When the movable electrode portion is separated from each other, a multi-electrode type wire is formed with a thin film cover for blocking contact with blood contained inside the cerebrovascular vessel.
The method of claim 1,
The flowable electrode part,
A multi-electrode type wire comprising a pair of cover members partitioned upward and downward based on the central wire.
The method of claim 1,
The flowable electrode part,
A multi-electrode type wire comprising four cover members partitioned in upper left, lower left, upper right and lower right directions based on the center wire.
The method of claim 1,
The flowable electrode part,
Containing, a multi-electrode type wire that is connected to the tip electrode and extends along the center wire by a predetermined distance and is coupled to the tip of the cover member.
The method of claim 4,
The non-conductor end,
A plurality of extensions are formed with different lengths from the tip electrode,
The cover member,
The plurality of non-conductor ends are formed to have different lengths according to the extended length, multi-electrode type wire.
The method of claim 4,
The non-conductor end,
Includes; an electromagnet that receives a current when coupled to the cover member and exhibits magnetism; and
The cover member,
When the flowable electrode unit enters a region where current measurement is required, a current supplied to the electromagnet is blocked to release the magnetism of the electromagnet, and the multi-electrode type wire is separated from the center wire.
The method of claim 1,
The flowable electrode part,
A passage through the inner side is formed, and when entering a region where current measurement is required, the fine wire passing through the passage is exposed to contact the inner wall of the cerebrovascular vessel to measure the current.
The method of claim 7,
The cover member,
When the current measurement is finished, the multi-electrode type wire moves to a position covering the center wire according to the movement of the fine wire.
delete The multi-electrode type wire of any one of claims 1 to 8; And
Including, a monitoring system including a multi-electrode wire, a central processing unit for synthesizing current information transmitted from the multi-electrode wire, and detecting an epileptic wave using a phase difference of the current information.

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