JP7095971B2 - Peripheral nerve testing equipment, peripheral nerve testing methods, and programs - Google Patents

Description

The present invention relates to a peripheral nerve examination device, a peripheral nerve examination method, and a program for inspecting the peripheral nerve of a subject.

Patent Document 1 is known as a technique for performing a peripheral nerve examination with a simple configuration. Patent Document 1 discloses a pain nerve stimulator capable of selectively stimulating only C fibers.

As an apparatus to which Patent Document 1 is applied, a peripheral nerve examination apparatus introduced in Non-Patent Document 1 can be mentioned (Non-Patent Document 1). In the examination using the peripheral nerve examination device, the subject is attached with an electrode for stimulation and the switch is grasped, and the examiner operates the peripheral nerve examination device to set the current value to be output and output the stimulation. conduct. The subject presses the switch when he / she feels the stimulus. The peripheral nerve test device tests the normality of the peripheral nerve of the subject based on the current value and reaction time (time from the start of stimulation to the pressing of the switch). When such a peripheral nerve test device is used, it is possible to test the peripheral nerve with a simple configuration without attaching an electrode to the scalp as in the electroencephalogram test.

Japanese Unexamined Patent Publication No. 2011-164879

Portable peripheral nerve examination device PNS-7000, [Search on September 25, 2017], Internet <URL: http://www.nihonkohden.co.jp/iryo/documents/pdf/H901653C.pdf> Atsushi Kimura, Nobuo Hara, "For those who study nerve conduction test and electromyogram", Igaku-Shoin Koji Inui, Ryusuke Kakigi, “Pain perception in humans: use of intraepidermal electrical stimulation”, J Neurol Neurosurg Psychiatry 83: 551-556, 2012. Maxim Churyukanov, Leon Plaghki, Valery Legrain, Andre Mouraux, “Thermal Detection Thresholds of Aδ- and C-Fibre Afferents Activated by Brief Co2 Laser Pulses Applied onto the Human Hairy Skin”, PLoS ONE 7 (4): e35817. /doi.org/10.1371/journal.pone.0035817 Mark J.Zylka, Frank L. Rice, and David J.Anderson, “Topographically Distinct Epidermal Nociceptive Cricuits Revealed by Axonal Tracers Targeted to Mrgprd”, Neuron, Vol. 45, 17-25, January 6 2005

In the inspection using an apparatus such as Non-Patent Document 1, the reaction time of the subject is measured for each of a plurality of stimuli while changing the intensity of the stimulus. Then, it is common to inspect the subject's nervous system based on the intensity and reaction time of the minimum stimulus that the subject can perceive.

In these peripheral nerve tests, the reaction time to the stimulus is determined according to the press of the switch of the subject (and thus the expression of sensing). Therefore, there may be cases where the subject makes an operation error or the subject's efforts for inspection are inappropriate. In such a case, the subject's examination was performed normally because the minimum sensed current value happened to be a normal value even though the reaction time of each of the multiple stimuli with different intensities was not appropriate. There was a risk of judging that it was broken. That is, there is a problem that it is not possible to know whether or not a normal test is performed in a test using only the minimum sensory stimulus intensity as a criterion.

Therefore, the present invention can determine whether or not a normal examination is performed when the peripheral nerve of the subject is examined based on the expression of the sense of stimulation by the subject (for example, pressing a switch). The main purpose is to provide a peripheral nerve examination device, a peripheral nerve examination method, and a program.

One aspect of the peripheral nerve examination apparatus according to the present invention is
A device that inspects the subject's peripheral nerves based on the subject's statement of stimulus sensing.
A stimulus control unit that gives the subject multiple stimuli with different intensities,
For each of the plurality of stimuli, a measuring unit for measuring the measured value of the reaction time of the subject, and a measuring unit.
It is provided with an output unit that outputs the relationship between the change in the measured value and the change in the intensity of the stimulus.

The peripheral nerve examination device is configured to output the relationship between the change in the measured value of the reaction time and the change in the intensity of the stimulus. The examiner can easily determine whether or not the examination was performed normally (whether or not the peripheral nerve examination was performed normally) by referring to the output information.

INDUSTRIAL APPLICABILITY The present invention is a peripheral nerve test device, a peripheral nerve, which can determine whether or not a normal test is performed when a test of the peripheral nerve of the subject is performed based on an expression of sensing of a stimulus by the subject. Inspection methods and programs can be provided.

It is a block diagram which shows the structure of the peripheral nerve examination apparatus 1 which concerns on Embodiment 1. FIG. It is an output screen example (at the time of normal inspection) by the output unit 14 which concerns on Embodiment 1. FIG. It is an output screen example (at the time of abnormality inspection) by the output unit 14 which concerns on Embodiment 1. FIG. It is an output screen example (at the time of normal inspection) by the output unit 14 which concerns on Embodiment 1. FIG. It is a block diagram which shows the structure of the peripheral nerve examination apparatus 1 which concerns on Embodiment 2. FIG. It is a figure which shows the hardware composition of the peripheral nerve examination apparatus 1 which concerns on Embodiment 1 or 2.

First, the matters that are the premise of the present invention will be described in detail. There are multiple types of nerve fibers (C fibers, Aδ fibers, etc.). It is known that C fibers are more likely to be excited by electrical stimulation than Aδ fibers (Non-Patent Documents 3 and 4). For example, Non-Patent Document 3 shows that C fibers responded to laser stimulation at about 40 ° C and Aδ fibers responded at about 46 ° C. That is, it is shown that the C fiber responded to a weaker stimulus than the Aδ fiber. This is because the C fiber has a nerve extending to the periphery more than the Aδ fiber (Non-Patent Document 5Fig.5B), so that the C fiber is considered to respond even to a weaker stimulus. ..

Further, it is widely known that the conduction time differs depending on the type of nerve fiber (Non-Patent Document 2). For example, the conduction velocity of Aδ fibers is about 10 to 30 m / s, while the conduction velocity of C fibers is about 0.5 to 2.5 m / s.

That is, when a stimulus of a weak intensity (0.05 mA to 0.20 mA in the following explanatory example) is given to the subject, only the C fiber responds to the stimulus and its conduction velocity becomes slow. That is, the time from giving the stimulus to recognizing the stimulus becomes longer.

Further, when a strong stimulus (from 0.30 mA in the following explanatory example) is given to the subject, the Aδ fiber also responds to the stimulus, so that the conduction velocity becomes high. That is, the time from giving the stimulus to recognizing the stimulus is shortened.

The following peripheral nerve examination device 1 operates on the premise of this characteristic.

<Embodiment 1>
The peripheral nerve examination device 1 according to the present embodiment has a configuration to which the above-mentioned features are applied. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a peripheral nerve examination device 1 according to the present embodiment.

The peripheral nerve examination device 1 is a device that evaluates the peripheral nerve of the subject based on the expression of the perception of the stimulus by the subject. More specifically, the peripheral nerve examination device 1 stimulates the peripheral nerve of the subject via the electrode 30. The subject expresses that he / she felt the stimulus by operating the operation unit 20 (preferably a gripping type switch) when he / she felt the stimulus. The peripheral nerve examination device 1 evaluates the peripheral nerve of the subject based on the measured values of the intensity of the given stimulus and the reaction time (the time from the start of the stimulus to the operation of the operation unit 20). The detailed configuration will be described below.

The peripheral nerve examination device 1 has a main body unit 10 and an operation unit 20. The main body 10 and the operation 20 are connected by a general cable. Further, the main body 10 is configured to be removable from the disposable electrode 30. The electrode 30 is an aspect of a member that stimulates the peripheral nerves of the subject, and is, for example, a disposable electrode that can be attached to the skin of the subject. Similar to Patent Document 1, the electrode 30 has a first electrode whose tip is slightly pierced into the skin of the inspected person and a first electrode which is arranged around the first electrode and used in contact with the skin of the inspected person. It may be composed of two electrodes.

Instead of the electrode 30, a probe or the like that stimulates the peripheral nerves of the subject may be connected to the main body 10.

The main body 10 is preferably a housing having a size that can be grasped by an inspector (for example, a medical worker). An input unit 15 and a display 16 are arranged on the housing of the main body unit 10. For example, the input unit 15 is a button, a scroll wheel, or the like provided on the housing of the main body unit 10. The inspector inputs an arbitrary setting, a signal for starting stimulation, or the like by operating the input unit 15. The display 16 is a liquid crystal display provided on the housing of the main body 10. The main body 10 may also include a speaker and a power supply (not shown). Further, the display 16 may be in a form having the function of the input unit 15 (so-called touch display).

The operation unit 20 is an interface operated by a subject undergoing a peripheral nerve examination. Preferably, the operation unit 20 is a grip-type switch that is gripped by the subject. Inside the operation unit 20, various electric circuits and the like for transmitting a detection signal to the main body unit 10 when the switch is pressed are arranged. The detection signal is input to the main body 10 via a cable.

When the subject senses the stimulus via the electrode 30, the subject operates the operation unit 20 and notifies the main body unit 10 that the stimulus is detected (in other words, the subject expresses that he / she felt the stimulus. ).

The main body 10 includes a control unit 11. The control unit 11 is a processing unit that performs various controls of the peripheral nerve examination device 1, and has a measurement unit 12, a stimulus control unit 13, and an output unit 14.

The stimulus control unit 13 controls the intensity and timing of the stimulus given via the electrode 30. The stimulus control unit 13 gives the subject a plurality of stimuli with different intensities via the electrode 30. The intensity of the stimulus may be controlled by the magnitude of the current value or the voltage value. In the following description, it is assumed that the intensity of the stimulus is controlled by the change of the current value.

The change in the intensity of the stimulus controlled by the stimulus control unit 13 and the number of stimuli can be set by the inspector via the input unit 15. The inspector inputs, for example, the current value of the first stimulus, the unit for increasing / decreasing the current value, the number of stimuli, and the like via the input unit 15. Further, the inspector may input the current value and the stimulation timing for each stimulation via the input unit 15. The stimulus control unit 13 executes a plurality of electrical stimuli via the electrode 30 based on information such as an input current value. The stimulus control unit 13 may control the output of the stimulus so that the intensity gradually increases, or may control the output of the stimulus so that the intensity gradually decreases.

The measuring unit 12 measures the measured value of the reaction time of each of the plurality of stimuli given via the electrode 30. The measuring unit 12 may calculate the measured value of the reaction time for each stimulus by using, for example, the notification signal of the stimulus start by the stimulus control unit 13 and the detection signal input from the operation unit 20.

The output unit 14 acquires the measured value of the reaction time to each stimulus measured by the measuring unit 12. Further, the output unit 14 acquires information on the intensity of each stimulus controlled by the stimulus control unit 13. That is, the output unit 14 acquires a set of the intensity of each stimulus and the measured value of the reaction time.

The output unit 14 outputs the relationship between the intensity of each stimulus and the measured value of the reaction time for each stimulus for a plurality of stimuli. Preferably, the output unit 14 outputs data for displaying the relationship between the intensity of the stimulus and the measured value of the reaction time to the stimulus on the display 16 as a two-dimensional graph. The display will be described with reference to FIGS. 2 to 4.

FIG. 2 shows a two-dimensional graph when the peripheral nerve examination of the subject is normally performed, and FIG. 3 shows a two-dimensional graph when the peripheral nerve examination of the subject is not normally performed. The intensity (current value) of the stimulus is displayed on the horizontal axis (first axis) of each two-dimensional graph, and the reaction time is displayed on the vertical axis (second axis). The horizontal axis may indicate the reaction time, and the vertical axis may indicate the intensity of the stimulus (current value).

As shown in the figure, the output unit 14 plots the current value of each stimulus and the measured value of the reaction time, and outputs data for displaying the points connected by a line. As described above, when the intensity of the stimulus is low (below the predetermined threshold), only the C fibers having a slow conduction velocity react, and when the intensity of the stimulus is high (above the predetermined threshold), the conduction velocity is high. Fast Aδ fibers also respond. Therefore, as shown in FIG. 2, it is normal that the reaction time drops sharply when the intensity of the stimulus exceeds a certain value. In the example of FIG. 2, the reaction time is about 1.00 to 1.50 seconds until the current value is about 0.20 mA, and the reaction time is about 0.50 seconds or less when the current value exceeds 0.30 mA. Will be.

Here, it is preferable that the output unit 14 outputs index information indicating at least one of a normal range and an abnormal range of the reaction time. In the example of FIG. 2, the output unit 14 has a box B1 (first box) which is a region (first region) showing a normal range of reaction time by C fibers, and a region (first region) showing a normal range of reaction time by Aδ fibers. Data for displaying the box B2 (second box), which is the second area), is output. The sizes of the boxes B1 and B2 (the range of the reaction time and the range of the current value) may be determined, for example, based on the test results by a sufficient number of subjects. Further, the sizes of the boxes B1 and B2 may be determined in consideration of the attributes (age, gender, etc.) of the subject to be inspected. Whether or not each measured value is within the range of boxes B1 and B2 is an index for determining the normality of the inspection.

It is more desirable that the box B1 and the box B2 are represented by different display effects. For example, box B1 and box B2 are preferably shown with borders of different line types, borders of different line colors, or different paint colors. By being shown with different display effects, the examiner can easily understand the difference in the stimulated nerve.

The inspector refers to this two-dimensional graph and determines whether or not the inspection has been performed normally. The inspector determines that the inspection was performed normally when the measured value of the reaction time suddenly decreases when the current value exceeds a certain value (FIG. 2). The inspector determines that the inspection was not performed normally (abnormal) when the measured value of the reaction time did not change so much regardless of the magnitude of the current value (FIG. 3). The inspector also determines that the inspection was not performed normally even when the measured value of the reaction time increases as the current value increases. In the example of FIG. 3, even if the current value stimulates the Aδ fiber, the measured value of the reaction time is a considerably large time, so that the subject may not understand the intention of the examination. .. If the inspection is not performed normally, the inspector may redo the inspection or explain the inspection again, for example. It is more preferable that the inspector appropriately refer to the boxes B1 and B2, which are indicators of normal values, in the determination. That is, when each measured value (each plot) is contained inside the box B1 and the box B2, the inspector may determine that the inspection is highly likely to have been performed normally.

The boxes B1 and B2 shown in FIGS. 2 and 3 are a kind of index information for determining normality or abnormality of the reaction time. The output unit 14 may output data for displaying the index information by another method. For example, although the output unit 14 shows the normal range of the reaction time in the example of FIG. 2, the output unit 14 may output data for displaying the abnormal range instead of the normal range. Further, the output unit 14 may output data for displaying a figure as if the box B1 and the box B2 are combined, and may output data for displaying only the horizontal line separating the normal value range and the abnormal value range of the reaction time. It may be output.

In addition, it is considered that there is some variation in the current value at which the Aδ fiber starts the reaction due to the difference in the subject and the difference in the stimulation position. Therefore, the output unit 14 may display the box B3 of FIG. 4, for example. The box B3 is configured to connect a region A1 indicating a normal reaction time of C fibers and a region A2 indicating a normal reaction time of Aδ fibers.

In the above description (FIGS. 2 to 4), the output unit 14 outputs data for displaying the relationship between the change in the measured value of the reaction time with respect to the change in the intensity of the stimulus in a two-dimensional graph. Not limited. For example, the output unit 14 may output the relationship between the stimulus intensity and the measured value of the reaction time to the display 16 in a table format (a table listing the set of the stimulus intensity and the measured value of the reaction time), or CSV ( Comma-Separated Values) may be output as an electronic file in a format or the like. In this case, the inspector determines whether or not the inspection was performed normally by referring to the output table or electronic file.

When the output unit 14 outputs in a table format or as an electronic file, it is preferable that the output unit 14 also outputs the above-mentioned index information. For example, the output unit 14 may output the measured value of the reaction time when the current value is 0.40 mA and the normal range of the reaction time when the current value is 0.40 mA as described in the table.

It is preferable that the output unit 14 outputs a set of the measured values of the stimulus intensity and the reaction time for each of a plurality of stimuli, but if the output unit 14 outputs the relationship between the changes in the measured values and the changes in the stimulus intensity. It may be something else. That is, when the stimulus is performed 10 times, the output unit 14 may output at least the relationship between the intensity and the measured value of the reaction time for the stimuli of 2 or more times. For example, the output unit 14 (measured value of reaction time at intensity (for example, 0.15 mA) where C fiber seems to react) and (measured value of reaction time at intensity (for example, 0.40 mA) where Aδ fiber seems to react). It suffices if the two are output at a minimum, and the inspector can judge the normality of the inspection even with the configuration.

Subsequently, the effect of the peripheral nerve examination device 1 according to the present embodiment will be described. As described above, Aδ fibers and C fibers have different susceptibility to stimuli and different conduction velocities. Therefore, when a plurality of stimuli with different intensities are given, there is a possibility that the test may not be performed normally unless the reaction time according to this property is measured. The peripheral nerve examination device 1 is configured to output the relationship between the change in the measured value of the reaction time with respect to the change in the intensity of the stimulus. For example, the peripheral nerve examination device 1 displays the measured values of the stimulus intensity and the reaction time in a two-dimensional graph (FIGS. 2 and 3). The examiner can easily determine whether or not the examination is normally performed (whether or not the peripheral nerve examination is normally performed) by referring to this two-dimensional graph.

Further, as shown in FIG. 2 and the like, the peripheral nerve examination apparatus 1 also displays a normal range of reaction time (boxes B1 / B2 in the example of FIG. 2) in addition to the measured values. The inspector can accurately determine the normality of the inspection by comparing the measured value with the normal range.

<Embodiment 2>
The peripheral nerve examination device 1A according to the second embodiment is characterized in that it determines whether or not the examination is normally performed and notifies the determination result. The differences between the peripheral nerve examination device 1A according to the second embodiment and the first embodiment will be described below. Unless otherwise specified, the processing unit having the same name and the same reference numeral as that of the first embodiment shall perform the same operation as that of the first embodiment.

FIG. 5 is a block diagram showing the configuration of the peripheral nerve examination device 1 according to the present embodiment. The determination unit 17 is further provided in the control unit 11A as compared with the configuration of FIG. The determination unit 17 acquires the current value (intensity) of each stimulus controlled by the stimulus control unit 13 and the measured value of the reaction time for each stimulus measured by the measurement unit 12. Then, the determination unit 17 determines whether or not the inspection is normally performed based on the change in the measured value with respect to the change in the intensity of the stimulus (change in the current value). The determination unit 17 notifies the output unit 14 of the determination result.

Hereinafter, a first example of the determination process by the determination unit 17 will be described. The determination unit 17 reads out an index of normality or abnormality of the reaction time with respect to the intensity of the stimulus from the hard disk or the like. The index is, for example, a normal range of reaction time (information corresponding to box B1 or box B2) shown in FIGS. 2 and 3. Then, the determination unit 17 determines that the test has been performed normally when the measured value of the reaction time for each stimulus is within the normal value range. On the other hand, when the measured value of the reaction time for each stimulus is out of the normal value range, the determination unit 17 determines that the test has not been performed normally. That is, the determination unit 17 automatically determines the normality of the inspection visually performed by the inspector in FIGS. 2 and 3.

Next, a second example of the determination process by the determination unit 17 will be described. The determination unit 17 refers to a change in the measured value of the reaction time when the current value is changed. Then, the determination unit 17 determines whether or not there is a point where the measured value of the reaction time changes abruptly. More specifically, the determination unit 17 determines whether or not there is a portion where the measured value of the reaction time sharply decreases when the intensity of the stimulus is increased. When such a portion exists, the determination unit 17 determines that the inspection has been performed normally. On the other hand, the determination unit 17 determines that the inspection has not been performed normally when there is no portion where the measured value of the reaction time suddenly decreases.

The determination unit 17 may determine the normality of the inspection by combining the above-mentioned first example and the second example. That is, the determination unit 17 determines that the inspection has been performed normally when each measured value is in the normal value range and there is a portion where the measured value changes sharply.

The output unit 14 outputs the determination result by the determination unit 17 via the display 16 and the speaker 18. For example, the output unit 14 may display a warning message indicating that the inspection has not been performed normally on the display 16 or output an alarm sound via the speaker 18. Further, the output unit 14 may appropriately display (a message "the inspection was completed normally") or give a voice notification even when the inspection is normally performed.

The output unit 14 may display the two-dimensional graph or the like shown in FIGS. 2 or 3 on the display 16.

Subsequently, the effect of the peripheral nerve examination device 1A according to the present embodiment will be described. In the present embodiment, the peripheral nerve examination device 1A mechanically (automatically) determines whether or not the examination has been performed normally and notifies the user. As a result, the normality of the inspection can be accurately grasped without being affected by the subjectivity of the inspector.

Although the invention made by the present inventor has been specifically described above based on the embodiments, the present invention is not limited to the embodiments already described, and various changes can be made without departing from the gist thereof. It goes without saying that it is possible.

Note that the configurations of FIGS. 1 and 5 are block diagrams focusing on the functional characteristics of the main body 10, but FIG. 6 shows an example of the hardware configuration of the main body 10. The main body 10 includes a memory 101, a hard disk 102, a CPU 103, an external interface 104, an input unit 15, and a display 16. The main body 10 includes a speaker (not shown), various electric circuits, and the like. Each component is connected by a bus 105.

The external interface 104 is an interface for connecting the operation unit 20 (preferably a switch) to the main body unit 10. A detection signal is input to the external interface 104 from the operation unit 20.

The hard disk 102 is a secondary storage device in the main body 10, and stores various information. The hard disk 102 does not necessarily have to be built in the main body 10, and may be detachable from the main body 10. The hard disk 102 stores various data and programs necessary for executing the above-mentioned operations.

The CPU (Central Processing Unit) 103 develops data and programs necessary for executing various processes of the above-mentioned control units 11 and 11A (measurement unit 12, stimulus control unit 13, and output unit 14) on the memory 101. Execute each instruction included in the program. At least a part of various processes of the control units 11 and 11A (measurement unit 12, stimulus control unit 13, output unit 14) may be realized by peripheral circuits or the like (not shown).

Here, the program is stored using various types of non-transitory computer readable medium and can be supplied to the computer. Non-temporary computer-readable media include various types of tangible storage media. Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), optomagnetic recording media (eg, optomagnetic disks), CD-ROMs (Read Only Memory), CD-Rs. Includes CD-R / W, semiconductor memory (eg, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)). The program may also be supplied to the computer by various types of transient computer readable media. Examples of temporary computer readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

1,1A Peripheral nerve examination device 10 Main unit 11, 11A Control unit 12 Measurement unit 13 Stimulation control unit 14 Output unit 15 Input unit 16 Display 17 Judgment unit 18 Speaker 20 Operation unit 30 Electrode 101 Memory 102 Hard disk 103 CPU
104 External interface 105 Bus

Claims (7)

It is a peripheral nerve examination device that inspects the peripheral nerve of the subject based on the reaction of the subject to an electrical stimulus.
A stimulus control unit that gives the subject a plurality of electrical stimuli, each of which has a different intensity.
A measuring unit that measures the reaction time of the subject to each of the plurality of electrical stimuli, and a measuring unit.
An output unit for outputting information indicating the relationship between each intensity of the electrical stimulus and the reaction time is provided.
The output unit is
Data for displaying a two-dimensional graph having a first axis showing the intensity of the electrical stimulus and a second axis showing the reaction time.
Data for plotting the reaction time for each of the plurality of electrical stimuli on the two-dimensional graph, and
Peripheral nerves that output data for displaying the first region showing the normal or abnormal reaction time of C fibers and the second region showing the normal or abnormal reaction time of Aδ fibers in the two-dimensional graph. Inspection device. The first region is the first box showing the normal reaction time of the C fibers.
The peripheral nerve examination apparatus according to claim 1 , wherein the second region is a second box showing a normal reaction time of the Aδ fiber. The peripheral nerve examination apparatus according to claim 2 , wherein the first box and the second box are represented by different display effects. The peripheral nerve examination apparatus according to claim 3 , wherein the first box and the second box are represented by different colored borders, different line types, or different paint colors. It is a peripheral nerve examination device that evaluates the peripheral nerve of the subject based on the reaction of the subject to the electrical stimulus.
A stimulus control unit that gives the subject a plurality of electrical stimuli, each of which has a different intensity.
A measuring unit that measures the reaction time of the subject to each of the plurality of electrical stimuli, and a measuring unit.
Whether the reaction time of the subject to each of the plurality of electrical stimuli is contained in the first region showing the normal reaction time of the C fiber or in the second region showing the normal reaction time of the Aδ fiber. A determination unit for determining whether or not the peripheral nerve examination of the subject was normally performed, and
An output unit that outputs a determination result by the determination unit is provided.
Peripheral nerve examination device. It is a peripheral nerve examination method for inspecting the peripheral nerve of the subject based on the reaction of the subject to an electrical stimulus.
A stimulus control step that controls a plurality of electrical stimuli given to the subject, and where each of the plurality of electrical stimuli has different intensities.
A measurement step for measuring the reaction time of the subject to each of the plurality of electrical stimuli, and a measurement step.
Includes a display step, which displays information on the display indicating the relationship between each intensity of the electrical stimulus and the reaction time.
In the display step,
On a two-dimensional graph having a first axis showing the intensity of the electric stimulus and a second axis showing the reaction time, a plot point showing the reaction time for each of the plurality of electric stimuli, and a plot point showing the reaction time of the C fiber. A first region showing normal or abnormal reaction time and a second region showing normal or abnormal reaction time of Aδ fibers are displayed.
Peripheral nerve examination method performed by a computer device. A program for causing a computer device to execute the peripheral nerve examination method according to claim 6 .

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