JPS58163334A - Deep electrode - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deep electrode, in other words, a tube with an electrode for deriving bioelectricity.

The method of determining electroencephalogram #j that is clinically most widespread and contributes to medical treatment is a method generally referred to as the surface electrode method.

This is a method that monitors brain waves that appear on the scalp using electrodes attached to the scalp, amplifies them with an amplifier, and monitors the electrical activity of the brain without placing any significant burden on the subject. The 4I mold is present in areas that are considered to be indicators of normal or abnormal physiological activity. However, since the electroencephalogram obtained by the above method shows the sum of the electrical activities of a large number of cortical neurons, it is possible to clearly identify the location of the pathological brain that is generating the abnormal waves.
There are limits to our ability to understand the abnormal mechanisms of humans and their cortex.

One way to understand the mechanism by which abnormal brain waves occur due to brain occlusion is a method called blind electrometry, which measures brain waves by inserting electrodes into the skull. This is a method that can obtain important data in the sense that the results will be of great use in clinical electroencephalogram diagnosis performed using the surface electrode method.

To measure deep brain waves, a hole is generally made in the III bone, and most of the surface except the apex is covered with an insulator.
A deep needle electrode method is used in which a stainless steel wire is inserted as described below. When using one stainless steel wire with this method,
Measure the potential between this and a reference electrode attached to a specific area on the scalp, such as the ear thread or the top of the head.Furthermore, if you use a multilayer needle electrode with multiple layers of needles, you can also find the potential difference between them. .

However, this method is a dangerous measurement similar to N111 surgery, and there is a risk of causing new brain damage to the subject.

In the field of neurosurgery, if it is necessary to continue draining body fluids such as cerebrospinal fluid after surgery or if continuous measurement of brain pressure is required, a silicone tube called ventricular drainage is placed. It is customary to hold the drug until the patient has fully recovered. When such ventricular drainage is required, it is desirable to monitor the bioelectrical phenomena occurring in that area in order to more accurately track the recovery process.
In reality, it is not carried out because it involves great difficulties.

In addition, if it is necessary to continue to determine the patient's brain pressure after one operation, a tube can be placed in the oscilloscope or subdurally under the IIFJL, making it possible to measure the brain pressure outside the scalp. However, it would be convenient if we could monitor brain waves at the same time even during busy times like this. However, in many cases, this cannot be achieved due to the lack of alternative means.

The present invention fixes electrodes on the surface of a drainage tube for draining body fluids such as ventricular drainage, and attaches the electrodes to the patient for deep electroencephalogram measurement without looking at the patient. 6 The greatest advantage of Sawa-am measurement using the R-electrode of the present invention is that it allows the bioelectrical tube layer of neurosurgical patients to be properly treated without imposing a new load on the patient. As long as you can get the above guidelines.

This research has the potential to be of great help in the development of clinical electroencephalography by investigating the mechanism by which abnormal electroencephalograms occur.

The present invention will be specifically explained below with reference to Figure rljJK.

The drawing is a partially cutaway plan view showing an embodiment of the deep electric welding of the present invention. be. The open tip of the silicone tube (1) is plugged with %121, but @12+ is not necessary if the tube has its tip plugged in advance. (31 is a small hole made near the tip of the tube 11) for introducing body fluid. (4) is a small hole for introducing body fluid and drawing the conductive wire from the following electrode into the tube (!).
In the example shown in Figure 0, in which several tubes are provided at intervals between the blades, the tip of the tube ill is not provided with a small hole for manufacturing reasons, but it goes without saying that the tip may be provided with a small hole for introducing body fluid. (5
) is an electrode installed in the tube (1) in the following manner. (6) is a stainless steel wire with a diameter of about 0.1 mm and is used for electrodes and their conductor wires. This stainless steel wire (
6) into the silicone tube near the small hole (4) for retracting (
1; Wrap 7 to 10 times on the surface to form a cylindrical electrode (5) of about 11111 $I. in this case.

After forming the electrodes, make sure that the surface of the tube (1) is flat.
It is preferable to wrap the stainless steel wire (6) so tightly that the surface of the tube is concave, or to make a groove in advance on the surface of the tube (1) where the electrodes will be formed.If the tube with electrodes is moved inside or removed from the body, # Since the winding of this electrode (5) must not come loose, the electrode (5) is bonded with a silicone adhesive or the like so that the surface conductivity is not impaired.
Glue and fix to the surface.

In addition, in the figure, only two electrodes (5) and stainless steel a (6) are shown for ease of understanding, but in reality, the electrodes (5) are placed on the tube (11) at intervals of approximately 15 m (3-4) Provide.

One end of the stainless steel wire +6) is a silicon tube (!)
The other end is cut on the wall of the tube (1)
Insert it into the tube (1) through the small hole (4), insulate the surface and run it inside the tube +11, about 130 mm.
The end of the stainless steel wire (6) from the small hole (4) for leading in is brought out again to the 11th surface of the tube 01 through the small hole (a) located at a distance of m from the shoulder. After pulling out the stainless steel wire (6), close the small hole (7) in the upper part with adhesive or other appropriate means.For (8), cover the stainless steel wire with a tube +11K to protect the part where the stainless wire is pulled out.
It is e. The drawn-out electrode conductor wire is connected to a general vinyl wrinkle-covered conductor (not shown) to facilitate connection to a measuring device or the like. (9) is a body fluid suction port.

In the firefly elm part, several electrode conductors are electrically insulated and the electrode conductors are prevented from breaking due to external force.
K[jl? It is necessary that the As long as this requirement is met, the structure of the me part does not have to be as shown in the figure. Also, stainless #61 may be made of other wire materials, and the electrode portion is not made of stainless steel winding wire but silver or A.
g−＾gCiTube+ which may be other metals
Regarding II, silicone tube and riiJIII
If it is P, it is not necessary to use K11lN, and the dimensions are not limited to the above example, 1! K.

The size of the wire, the position of the electrodes, etc. can also be changed.

The above-mentioned tube with an electrode for deriving bioelectricity, that is, a deep electrode, was constructed with the same considerations as those used for placing a ventricular drainage in the ventricle after craniotomy, and is used for ventricular drainage and other drainage tubes. In exactly the same way, not only can cerebrospinal fluid be led into the tube (11) through several drainage fluid absorption holes (31, (4)) and expelled from the body fluid suction port (9),
It has a bioelectricity derivation function. When a drain or balloon for measuring brain pressure is inserted into the skull or under exposure to the brain for the purpose of continuously monitoring brain pressure, the deep electrode according to the present invention can be used instead of the drain or balloon to monitor brain pressure. At the same time, cortical brain waves can be monitored. In such cases, many patients have five bands wrapped around their heads and are unable to attach scalp pressure electrodes, but if the electrode-equipped tube of the present invention is used, the electroencephalogram can be quickly detected. is also a big advantage.

In addition, according to this report, the cerebrospinal fluid surrounding the tube with electrodes becomes an electrolyte, which not only creates a favorable environment for measurement, but also eliminates artifacts such as electromyography that are often encountered with surface electrode methods. (noise) will not be mixed in, so
IIK, which uses weak signals such as auditory response measurement, can also be very effective.

[Brief explanation of the drawing]

The figure is a partially cutaway plan view showing an embodiment of the present invention. (1)・・・・・・Tube, f31. (41・
...hole, (5) ...electrical connection, (6)
...Conductor, (9) ...Body fluid outlet.

Claims (1)

[Claims] A tube that has a plurality of holes on the side or on the side and the tip and absorbs body fluids through the holes and passes through them, electrodes for deriving bioelectricity installed at several places on the surface of the tube, and a tube from the electrodes into the tube. The #i part electrode is characterized in that it is equipped with a conducting wire arranged therein, and is capable of deriving bioelectrical phenomena at the same time as the discharge of body fluids and the closing pressure.