JP3699258B2 - Pain measurement device in human body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pain sensation f (x) caused by a measured pain source x occurring in a human body and a pseudo pain sensation f (x) caused by a variable pseudo pain source y generated by a pain generating device. y) and the original pain sensation f (x) and pseudo-pain sensation f (y) at the time when f (x) ≒ f (y) is satisfied The present invention relates to a pain measuring apparatus for a human body that measures the source x of pain occurring in the human body of the subject.
[0002]
[Prior art]
Pain is an unpleasant reaction caused by tissue damage applied to the human body. However, even if the degree of illness or injury is the same in terms of diagnosis, for example, the pain caused by the illness or injury, that is, the pain felt by the person, the intensity of the pain, the quality of the pain Is not always the same. That is an individual difference in pain, accompanied by very subjective content.
[0003]
However, as described above, there is a difference in strength regardless of the quality difference as described above, and it is possible to explain the extent of the so-called pain level. The most fundamental source of individual differences in pain is said to be high and low sensory thresholds, which govern the individual differences in the neurophysiological mechanisms of sensory nerves inherent to each individual. This is considered to be a difference.
[0004]
In addition to the fundamentals of neurophysiological mechanisms related to such sensations, emotional delicacy, toughness, or selfishness as a psychological function other than sensation is added, and the intensity of pain expressed by the person in words The difference appears prominently in the expression of pain expressed by movement.
By the way, with respect to the measurement of different pains for individual persons as described above, the following typical measuring methods or measuring apparatuses are conventionally employed.
[0005]
(A) An example by mechanical stimulation A measuring device in which a pin is attached to the tip of a spring and the pin is pressed against a human body to compress the spring to cause a certain amount of stinging in the measurement subject. In this measuring device, the degree of pain of a person is measured by measuring the degree of compression of the spring with a scale or the like.
[0006]
(B) An example caused by temperature stimulation The limbs are soaked in cold or hot water kept at a constant temperature, causing pain. For example, prepare a tank containing hot water of 40 ° C to 48 ° C and ask the person to be measured to immerse his / her hand in the wrist. It is recorded whether it changes.
[0007]
(C) An example by electrical stimulation The electrode is attached to two places on the body, and a relatively strong current is applied to cause the subject to feel certain pain, thereby measuring the occurrence of pain.
(D) Example of chemical substance Pain is measured by injecting a chemical substance into the skin to make the subject feel certain pain.
[0008]
【task to solve】
As described above, representative examples of conventional pain measurement methods have been introduced. As described above, (a) an example by mechanical stimulation, (b) an example by temperature stimulation, (c) an example by electrical stimulation, (d ) One example of chemical substances is a method of measuring experimental pain occurrence, and not a method of measuring clinical pain.
[0009]
In other words, the pain caused by the above method for measuring the occurrence of pain differs from the pain that we experience in daily life in several ways. For example, in the case of experimental pain, the duration of the pain is quite short, and the persistent pain that we sometimes experience (eg when deeply slicing a finger with a knife or having a throbbing pain due to toothache or headache) It is not allowed to make it. At best it only lasts for the duration of the experiment.
[0010]
In addition, emotional and emotional responses (fear and anxiety) associated with pain differ significantly between experimental pain and clinical pain. For example, as soon as we get up in the morning, when we are suddenly attacked by abdominal pain, we usually wonder how we got hurt. In such a case, the cause (whether it is food at dinner time or is it chilled) is asked or thought. If this can be convinced, there may not be much problem mentally, but after a half day without being able to grasp the cause clearly, it will become anxious and it may be malignant, or it will be hung in the evening I would like to see my doctor. In other words, even when simple abdominal pain is not known, it is such anxiety. Furthermore, in the event of a traffic accident or industrial accident, it is said that the anxiety and fear associated with the compensation problem, in addition to the future anxiety regarding the recovery of the disability, will further aggravate the pain.
[0011]
On the other hand, the above-mentioned test subjects in the laboratory generally leave the experimenters with peace of mind, and even if they can give pain, they are transient pains that can hurt the body. It is not a thing and the cause is clear, so it can be said that the anxiety of the subject is remarkably reduced.
In other words, the method or measuring device for measuring the occurrence of various pains described above is an experimental measurement of the occurrence of pain and is less urgency / realistic than clinical pain. As a measuring device, there was a problem that it was hardly useful.
[0012]
Therefore, in order to solve the conventional problems, the present invention provides a pain sensation f (x) caused by a measured pain source x occurring in a human body and a variable pseudo pain generated by a pain generating device. Compared to the pseudo pain sensation f (y) caused by the original y, the original pain sensation f (x) and the pseudo pain sensation f (y) become f (x) ≒ f (y). It is an object of the present invention to provide a pain measuring device in a human body that can measure the original pain x occurring in the human body of the subject by checking the pseudo pain source y with predetermined display data.
[0013]
[Means for Solving the Problems]
Therefore, in order to achieve the above object, the present invention provides a power source, a pain generating device that generates a predetermined electrical stimulus using the power source, and a variable pseudo pain source generated from the pain generating device. An electrode for applying the electrical stimulation to the measurement subject and a display means for displaying the original data of the pseudo-pain, and the pain sensation f (x ) And the pseudo pain sensation f (y) obtained by applying the variable pseudo pain source y generated by the pain generating device to a predetermined part of the human body, and the original pain sensation f (x) and pseudo pain measuring a sense f (y) is f (x) ≒ f (y ) to become the Rukoto be displayed by the display means data of the original y pseudo pain at the time of the original which occurred in the body of the subject pain x F (x1) -f (xn), which is a fluctuating pain sensation caused by the original x1-xn of the subject's pain occurring in the human body, and the pain The pseudo pain sensation f (y1) to f (yn) obtained by applying the variable pseudo pain source y1 to yn generated by the generator to a predetermined part of the human body is compared, and the pseudo pain sensation f (y1) to Let f (yn) follow the changes in the original pain sensation f (x1) to f (xn), and both pain sensations f (x1) to f (xn) and f (y1) to f (yn) become f (x1 ) ~f (xn) ≒ f ( y1) ~f (yn) and becomes the original continuous occurring in the human body of the subject by Rukoto be displayed by the display means data of the original y1~yn successive pseudo pain It has been possible to measure the pain x1~xn.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention employs the following measurement principle in the present embodiment in measuring (quantifying) pain formed by various factors.
First, measurement (quantification) of the amount of pain was performed based on the following concept.
By the way, when a new cause x2 of pain is added to an individual who feels pain y1 with respect to the cause x1, the subject feels new pain y2 simultaneously with y1.
[0015]
Now, when the cause x2 of the new pain is gradually increased, the new pain y2 also increases accordingly. When the user feels that the new pain y2 of the subject is about the same size as the original pain y1, the new pain cause amount x2 can be considered to be equal to the original pain cause amount x1. .
The measuring method was implemented as follows using a pain measuring device for a human body shown by the block in FIG.
[0016]
First, as shown in the block diagram, an apparatus for measuring pain in a human body according to the present invention includes a power source 1, a circuit power source 2, an oscillator 3, a frequency divider 4, an amplifier 5, a controller 6, and a voltage indicator. 7, a current indicator 8, an electrode 9, a printer 10, and a remote switch 11 for the controller 6.
By the way, the oscillator 3 oscillates at a frequency of 50 Hz, and the frequency divider 4 generates a rectangular wave having a pulse width of 1 ms, which is input to the amplifier 5 at the next stage, and finally through the electrode 9 to be measured. Is given as a stimulus signal to a predetermined part of
[0017]
Further, the controller 6 is provided with a setting unit 6a for setting the stimulation voltage and the voltage rising speed, and an operation unit 6b for performing start / stop / reset.
In addition, the electrode 9 connected to the predetermined part of the person to be measured M is a concentric electrode that is used by, for example, a commercially available low frequency treatment device.
[0018]
The pain measuring device (quantification) is a pain generated by low-frequency electrical stimulation, that is, a pseudo-pain sensation f (y) obtained by applying a variable pseudo-pain source y to a predetermined part of a human body. This is compared with the pain sensation f (x) caused by the element x.
The stimulation current is gradually increased, and the current value when the measurement subject M senses the pain balance f (x) ≈f (y) is recorded as the stimulation intensity corresponding to the pain.
[0019]
Measurement subjects and methods Subjects were 56 volunteers (27 men and 29 women), mainly student volunteers. The current value was measured for each of the minimum sense current and the pain corresponding current.
In order to give an experimental reference pain load, that is, a pain sensation f (x) due to the origin x of the pain, a compression plate (having a hemispherical tip) with a diameter of 2 cm is placed on the right forearm, which is 100 to 200 mmHg The air pressure was pressed.
[0020]
Result (examination of basic matters)
It was confirmed that the minimum perceived current did not change with respect to pain in the state where the standard pain due to right forearm compression was applied, and that pain did not change the sensory threshold for stimulation.
In addition, in order to examine the stability of measurement for pain sensation, a certain value of electrical stimulation is applied to one arm to create pain, i.e., pain sensation f (x) caused by pain x, and the other arm The measurement of pain was tried using the pain measuring apparatus in the human body according to the present invention.
[0021]
In the above measurement, the inner side of the forearm elbow joint was used as a site where no muscle movement was generated by electrical stimulation for both stimuli.
As a result, in this measurement method in which the amount of stimulation is gradually increased to obtain an equilibrium point, the measurement is as low as about 15%, but it has been confirmed that both have a high correlation.
Results (pain measurement)
The stimulation current value obtained corresponding to the pain load created experimentally changed in correlation with the amount of pain load.
[0022]
Although the pain produced and the sense of electrical stimulation are qualitatively different, the measurement is extremely reproducible and the pain can be separated and the intensity measured with the human body pain measuring device according to the present invention. Was confirmed.
In particular, the source of the subject's pain occurring in the human body, for example, the fluctuating pain sensation f (x1) to f (xn) caused by x1 to xn, such as labor before the birth of a pregnant woman, and predetermined pain occurrence Compared to the pseudo pain sensation f (y1) to f (yn) obtained by applying the variable pseudo pain source y1 to yn generated by the device to a predetermined part of the human body, the pseudo pain sensation f (y1) to f (yn) is made to follow changes in the original pain sensation f (x1) to f (xn), and both pain sensations f (x1) to f (xn) and f (y1) to f (yn) become f (x1) ~ F (xn) ≒ f (y1) ~ f (yn) It is possible to measure the data of continuous pseudo pain source y1 ~ yn by a predetermined display means provided in relation to the pain generating device Therefore, it is possible to accurately and accurately grasp the continuous pain measurement at the time of delivery of the pregnant woman, and therefore, it is possible to promote the safe delivery of the pregnant woman.
[0023]
【The invention's effect】
The pain measuring device in the human body according to the present invention includes a pain sensation f (x) caused by the pain source x of the measurement subject occurring in the human body and a variable pseudo pain source generated by a predetermined pain generating device. Compared to the pseudo pain sensation f (y) obtained by applying y to a predetermined part of the human body, the original pain sensation f (x) and the pseudo pain sensation f (y) are f (x) ≈f (y) By confirming the data of the pseudo-pain source y at the point of time with a predetermined display means provided in connection with the pain generating device, the original pain x occurring in the human body of the subject can be measured, and the human body Fluctuating pain sensation f (x1) to f (xn) caused by the pain source x1 to xn of the subject being measured and variable pseudo pain source y1 to yn generated by a predetermined pain generator The pseudo pain sensation f (y1) to f (yn) obtained by applying to a predetermined part of the human body is compared, and the pseudo pain sensation f (y1) to f (yn) is compared with the original pain sensation f (x1) to f (yn). Added to change of (xn) , F (x1) to f (xn) and f (y1) to f (yn) become f (x1) to f (xn) ≒ f (y1) to f (yn) It is possible to measure continuous original pains x1 to xn occurring in the human body of the measured person by confirming the data of the original elements y1 to yn by a predetermined display means provided in association with the pain generating device. Therefore, in this measurement method that obtains an equilibrium point by gradually increasing the amount of stimulation while giving the standard pain, it can be confirmed that there is a high correlation between the two and experimentally created pain load The stimulation current value obtained corresponding to the change was correlated with the pain load. As a result, the sensation of pain and electrical stimulation created is qualitatively different, but the measurement is extremely reproducible and it can be confirmed that pain can be separated and intensity can be measured. However, it has various excellent effects such as being able to be sufficiently employed.
[Brief description of the drawings]
FIG. 1 is a block diagram for explaining an embodiment of a pain measuring apparatus for a human body according to the present invention. FIG. 2 is a measuring apparatus in which each part of the apparatus shown in the block diagram is incorporated. Illustration of the appearance of the [Description of symbols]
DESCRIPTION OF SYMBOLS 1 ... Power supply 2 ... Circuit power supply 3 ... Oscillator 4 ... Dividing feedback 5 ... Amplifier 6 ... Controller 6a ... Setting unit 6b... Operation unit 7 for starting, stopping, resetting, etc.... Voltage display 8... Current display 9. ... Remote switch M: Person to be measured

Claims (2)

A power source, a pain generating device that generates a predetermined electrical stimulus using the power source, an electrode that provides the subject with the electrical stimulus that causes variable pseudo-pain generated from the pain generating device, and and display means for displaying the original data of the pseudo pain, variable pseudo the pain sensation f (x) caused by the original x pain of the subject occurring in the human body, is generated by the pain generator The pseudo pain sensation f (y) obtained by applying the pain source y to a predetermined part of the human body is compared, and the original pain sensation f (x) and the pseudo pain sensation f (y) are f (x) ≈f the original y data of the pseudo pain at the time the (y) to be occurring in the human body as well as to be able to measure the original pain x caused in the human body of the subject by Rukoto is displayed on the display means and pain sensation f (x1) ~f (xn) that changes caused by the original x1~xn of measurement's pain, is generated by the above-mentioned pain generator The pseudo-pain sensation f (y1) -f (yn) is compared with the pseudo-pain sensation f (y1) -f (yn) obtained by applying the variable pseudo-pain source y1-yn to a predetermined part of the human body. To the original pain sensation f (x1) to f (xn), and both pain sensations f (x1) to f (xn) and f (y1) to f (yn) become f (x1) to f ( xn) ≒ f (y1) ~f (yn) to become the data of the original y1~yn successive pseudo pain of the original continuous occurring in the human body of the subject by Rukoto is displayed on the display means pain x1 A device for measuring pain in a human body, characterized in that ~ xn can be measured. Original y1 ~ yn variable pseudo pain continuously be generated in the pain generator is pain measurement device in the human body according to claim 1, characterized in that which is generated by the low-frequency electrical stimulation.

Images