JPH063535Y2 - Electrode for measuring conduction velocity of human nerve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a measuring electrode for measuring conduction velocity in nerves of a hand arm portion of a human body, for example.

(B) Conventional Technology Conventionally, when measuring the conduction velocity of nerves of the human body, the method shown in FIG. 6 has been used.

That is, the electrodes a and b are fixed to the points A and B, the upper position C of nerve conduction is electrically stimulated by the electrode c, and the stimulus detection times at the points A and B are measured, respectively, The conduction velocity X is measured at.

X = AB / (TB-TA) AB: Distance between points A and B (mm) TA: Stimulation conduction time between points C and A (msec) TB: Stimulation conduction time between points C and B (msec) X: Conduction velocity (m / sec) When measured by such a measurement method, the conduction velocity between two points A and B can be measured, but this 2
There is a problem that it is not possible to detect the conduction state at a site where the points are subdivided.

Further, a multi-electrode type biomedical electrode in which a large number of electrodes are attached to a base material at predetermined intervals is disclosed in Japanese Utility Model Publication Nos. 63-158310 and 63-154008.

(C) Problems to be solved by the device However, in the case of the above-mentioned biomedical electrode, when it is used as an electrode for measuring the nerve conduction velocity, the insulation between the electrodes fails and the signal cannot be read. There is a problem and a problem that nerve conduction in a short distance cannot be evaluated.

Therefore, the present invention aims to provide an electrode for measuring the conduction velocity of a human nerve capable of reliably measuring the conduction velocity of a subdivided portion, and it is possible to cancel errors in TA, TB, and AB.

(D) Means for Solving the Problems This invention is a flexible device in which a plurality of electrodes are fixed to a mounting plate at predetermined intervals, and a slit is provided in an intermediate portion between adjacent electrodes of the electrodes. It is characterized in that it is an electrode for measuring the conduction velocity of the human body nerve, in which an insulator is interposed and the upper surface of the insulator is formed slightly higher than the upper surface of the electrode.

(E) Action In the human body nerve conduction velocity measuring electrode of the present invention, for example, an electrode paste is applied to the electrode surface, and the electrode paste is pressed into contact with the measurement site of the human body.

By this pressing contact, the electrodes come into contact with the human body through the electrode paste, and it is possible to perform measurement while the electrodes are reliably insulated from each other by the slit of the insulator.

(F) Effect of the Invention According to the above results, by arranging a large number of electrodes in parallel, it is possible to easily subdivide the measurement portion and find a portion having abnormal nerve conduction. Furthermore, since the insulation between the electrodes is ensured by the slits, good measurement results can be obtained without error.

(G) Embodiment of the Invention One embodiment of the invention will be described in detail below with reference to the drawings.

The drawing shows an electrode for measuring the conduction velocity of the human nerve, FIG.
In FIG. 2, the conduction velocity measuring electrodes 10 described above are arranged at predetermined intervals, for example, at intervals of 1.5 mm and 2.5 × 3 ×.
Nine electrodes 11 having a size of 12.5 (mm) are arranged in parallel and fixed to a mounting plate 12 made of an insulating rubber material having flexibility with an appropriate adhesive, and each electrode is The conducting wires 13 connected to 11 are taken out and focused on the back surface side of the mounting plate 12.

Flexible insulators 14 made of foamed resin urethane are adhered and fixed to both side surfaces of each electrode 11 in the parallel direction, and an insulating portion is formed between adjacent insulators 14 by slits 15. Is forming.

The upper surfaces of the above-mentioned insulators 14 ... Are formed to be higher than the upper surfaces of the electrodes 11 ...

A measuring method for measuring the conduction velocity of the human body nerve with the conduction velocity measuring electrode 10 configured as described above will be described with reference to FIG.

That is, if the measurement site is, for example, the palm, an electrode paste is applied to the surface of the palm or the electrode surface of the measurement electrode 10 to bring it into contact with the palm, and the measurement electrode 10
Press to fix.

By pressing the measurement electrode 10, the insulators 14 ... Are compressed and each electrode 11 ... Can contact the skin. The electrodes 15 are insulated from each other by the slits 15 and the nerve action potential is conducted only to the electrodes 11 having the smallest electric resistance.

The lead wires 13 of each electrode 11 are connected to an electromyography meter (not shown). On the electromyography side, a pair of adjacent electrodes 11 is used as an indifferent electrode and an indifferent electrode, which is read as one channel, Therefore, eight channels can be set with the nine electrodes 11 ..., By scanning each channel, the stimulation signal by electrical stimulation is read.

FIG. 4 shows a signal waveform obtained by reading the stimulation signal in each channel, and FIG. 5 shows the nerve conduction characteristic.

Usually, connecting the time points from the 1st to the 5th channels where the stimulus signal of each channel is read results in a linear regression line α,
The regression coefficient indicates the conduction velocity.

In the case shown in FIG. 5, the 6th, 7th, and 8th channels are each delayed from the linear regression line α, so in this case, it can be recognized that the portion of the 6th channel is abnormal.

Thus, in this embodiment, a large number of electrodes 11 ...
By subdividing the measurement part, it is possible to easily find the part where the nerve conduction is abnormal, and it is possible to accurately calculate the conduction velocity.

Although the above embodiment discloses eight channels using nine electrodes 11, the number of electrodes 11 can be freely set and the size thereof can be freely designed. The configuration is not limited to the above.

[Brief description of drawings]

 The drawings show an embodiment of the present invention. Fig. 1 is a plan view of a conduction velocity measuring electrode, Fig. 2 is a sectional view thereof, Fig. 3 is a measurement explanatory diagram, Fig. 4 is a measurement signal waveform diagram, FIG. 5 is a conduction characteristic diagram, and FIG. 6 is an explanatory diagram showing a conventional measuring method. DESCRIPTION OF SYMBOLS 10 ... Electrode for conduction velocity measurement 11 ... Electrode, 12 ... Mounting plate 13 ... Conductive wire, 14 ... Insulator 15 ... Slit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location 8119-4C A61B 5/04 300 J 8119-4C 300 M

Claims (1)

[Scope of utility model registration request] 1. A plurality of electrodes are fixed to a mounting plate at a predetermined interval, and a flexible insulator insulated by a slit is interposed in the intermediate portion between adjacent electrodes of the electrodes. An electrode for measuring the conduction velocity of the human body nerve whose upper surface is slightly higher than the upper surface of the electrode.