JP2019072329A - Electrostimulator - Google Patents

Abstract

To provide an electrostimulator capable of reducing feebleness and pain.SOLUTION: An electrostimulator comprises: electrodes attached to a living body (first electrode 3 for electric stimulation, second electrode 4 for electric stimulation); pulse output means 12 for supplying a pulse applied to the electrodes 3, 4; and a control part 15 for controlling the pulse output means 12. The control part 15 changes in a random manner, frequency and/or intensity of pulses, for a prescribed number of pulses applied to the electrodes 3, 4 continuously, based on uniform distribution or Gaussian distribution.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electrical stimulation device.

  Traditionally, functional electrical stimulation (FES) for the purpose of functional improvement of paralyzed limbs, therapeutic electrical stimulation (TES) for the alleviation of pain, etc. Neuromuscular electrical stimulation (NMES) is known, and Patent Document 1 describes a functional electrical stimulation system that individually provides electrical stimulation to each of a plurality of muscles in the peri-ankle muscle group. ing. Although a plurality of muscles are stimulated individually, the frequency of the electrical stimulation pulse given to each muscle is constant.

JP, 2013-94305, A

When the frequency of the pulse of electrical stimulation is constant, muscle fatigue is likely to occur, and there is a problem that a patient who is being treated tends to feel fatigue and pain.
The present invention has been made to solve such a problem, and an object of the present invention is to provide an electrical stimulation device capable of reducing fatigue and pain.

  The electric stimulation device according to the present invention according to claim 1 comprises an electrode to be attached to a living body, a pulse output means for supplying a pulse to be applied to the electrode, and a control unit for controlling the pulse output means The unit is characterized by randomly changing the frequency and / or intensity of the pulse based on a uniform distribution or a Gaussian distribution, for a predetermined number of the pulses continuously applied to the electrode.

  According to this configuration, rather than mobilizing localized motor units alone, a wider range of motor units will be mobilized, and it becomes closer to voluntary movement. As a result, it leads to the reduction of the feeling of fatigue. In addition, since pain and discomfort are less likely to occur, stronger electrical stimulation can be given, and improvement of the treatment effect and improvement of the treatment efficiency can be expected.

  In the electric stimulation device according to claim 2, an output period in which a plurality of the pulses are continuously output and a pause period in which the pulses are not output are alternately repeated, and the frequency of the pulses included in the plurality of the output periods And / or the intensity is a uniform distribution or a Gaussian distribution.

  According to this configuration, since pain and discomfort are less likely to occur, stronger electrical stimulation can be given, and improvement of the therapeutic effect can be expected. In addition, the frequency of treatment can be increased, and the treatment effect and treatment efficiency can be improved. In addition, the therapeutic effect can be expanded by expanding the number of treatable subjects.

  The electrical stimulation apparatus according to claim 3 includes storage means for storing a table in which data in which the frequency and / or intensity of the pulse are randomly changed are stored, and the distribution of the data is uniform distribution or Gaussian distribution. The control unit sets the frequency and / or intensity of the pulse by sequentially referring to the data of the table.

  According to this configuration, when setting the frequency of the pulse and / or the intensity of the pulse, it can be set faster than in the case of calculation, and can be set following the output of the pulse. In addition, accurate random electrical stimulation with high reproducibility can be realized, and a more effective output pattern can be set. In addition, since the data of the intensity of the pulses arranged in the table can be made to be equal to or less than a predetermined value, very strong electrical stimulation is not output, and the safety is enhanced.

  The electric stimulation apparatus according to claim 4 is characterized in that the control unit controls the intensity of the pulse so as to be equal to or less than a predetermined value. According to this configuration, very strong electrical stimulation is not output, and safety is enhanced.

  The electric stimulation device according to claim 5 is characterized in that the maximum value of the intensity of the pulse can be set while applying and confirming the pulse to the living body. According to this configuration, the strength of the electrical stimulation can be set in accordance with the condition and preference of the subject.

  In the electric stimulation device according to claim 6, the control unit changes the frequency of the pulse at random based on a Gaussian distribution, and the range of ± 2σ of the Gaussian distribution is ± 30 of the average value of the frequency of the pulse It is characterized by being in the range of%. According to this configuration, the effects of reducing the feeling of fatigue and improving the therapeutic effect can be further enhanced.

  According to the present invention, rather than mobilizing localized motor units alone, a wider range of motor units will be mobilized, approaching voluntary exercise. As a result, it leads to the reduction of the feeling of fatigue. In addition, since pain and discomfort are less likely to occur, stronger electrical stimulation can be given, and improvement of the treatment effect and improvement of the treatment efficiency can be expected.

It is a top view of the electric stimulation device concerning an embodiment of the invention. It is a block diagram which shows the electric constitution of the same electrical stimulation apparatus. (A) is a pulse waveform figure applied to the stimulation electrode of the same electrical stimulation apparatus, (b) is a pulse waveform figure which expands and shows an output period. (A) is a figure showing uniform distribution, (b) is a figure showing Gaussian distribution. It is a figure explaining the experiment which performed the electrical stimulation to the test subject. It is a figure which shows the measurement result of the plantar flexion torque by effect verification experiment, (a) is the case of condition A, (b) is the case of condition B, (c) is the case of condition C.

  Hereinafter, an electrical stimulation device according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the electrical stimulation device 1 according to the embodiment of the present invention has a device main body 2 in which an electric circuit for outputting electrical stimulation is provided, and a skin surface of a paralyzed site of a treatment subject The first electric stimulation electrode 3 and the second electric stimulation electrode 4 which are arranged to apply the electric stimulation, and the first electric stimulation electrode 3 and the second electric stimulation electrode 4 are connected to the device main body 2 The first electrode cable 5 and the second electrode cable 6 are mainly configured.

  The first electrode 3 for electrical stimulation is composed of two electrodes 3a and 3b, and the electrodes 3a and 3b are composed of a hook type gel electrode whose back surface is a sticking surface to be stuck on the skin surface of the treatment subject ing. The respective hooks of the electrodes 3a and 3b are engaged with the distal end sides of the first electrode cable 5 branched into two at midway positions, and the connection plug 5a on the proximal end side of the first electrode cable 5 is the upper side surface of the device body 2 The first output connector 7 provided on the left side is detachably fitted.

  The second electrode 4 for electrical stimulation is composed of two electrodes 4a and 4b, and the electrodes 4a and 4b are composed of a hook type gel electrode whose back surface is a sticking surface to be stuck on the skin surface of the treatment subject ing. The respective hooks of the electrodes 4a and 4b are engaged with the respective tip end sides of the second electrode cable 6 branched into two in the middle position, and the connection plug 6a on the base end side of the second electrode cable 6 is the upper side surface of the device body 2 The second output connector 8 provided on the right side is detachably fitted.

  On the surface of the device body 2, an operation switch unit 9 for setting or changing a treatment condition, a liquid crystal display unit 10 for displaying information such as the set treatment condition, and an LED display unit 11 are provided. The operation switch unit 9 is a power switch 9a for turning on and off the main power supply, an adjustment knob 9b for adjusting the output of the electrical stimulation, and an upper switch 9c for moving the cursor upward of the liquid crystal display unit 10 and increasing the set value of the treatment condition. A lower switch 9d for moving the cursor downward of the liquid crystal display unit 10 and reducing the setting value of the treatment condition, a left switch 9e and a right switch 9f for moving the cursor to the left and right of the liquid crystal display unit 10 respectively; It comprises various switches of an operation lock switch 9h for invalidating operations other than the decision switch 9g for setting and changing, the power switch 9a and the operation lock switch 9h.

  FIG. 2 is a block diagram showing the electrical configuration of the electrical stimulation device 1. The electrical stimulation device 1 includes a pulse output unit 12, a power supply circuit 13, a battery voltage detection circuit 14, a control unit 15, a storage unit 16 and a communication circuit 17, which are provided inside the device body 2. . The control unit 15 controls the liquid crystal display unit 10, the LED display unit 11, the pulse output unit 12, the storage unit 16, and the communication circuit 17, and is configured by a microcomputer (microcomputer). The storage unit 16 readably stores the set treatment condition and the like, and is configured of, for example, a non-volatile memory (EEPROM). The communication circuit 17 is a circuit for performing transmission and reception of information with the tablet terminal (external device) 50 by, for example, near field communication. Instead of operating the operation switch unit 9, the tablet device 50 can operate the electrostimulation device 1. Moreover, the tablet terminal 50 can display a treatment condition etc., and can memorize | store treatment conditions, such as a stimulation pattern.

  The pulse output means 12 is means for supplying an electrical stimulation to the first electrical stimulation electrode 3 and the second electrical stimulation electrode 4 and DC which boosts the voltage of the battery power supply 18 and the battery power supply 18 and supplies it as an output power supply. -DC converter 19, output control circuit 20 for controlling voltage input from DC-DC converter 19, first output transformer 21 and second output transformer 22 for boosting output voltage from output control circuit 20, first output transformer A first current detection circuit 23 for detecting the output current from the second circuit 21 and a second current detection circuit 24 for detecting the output current from the second output transformer 22 are provided. The output current signals detected by the first current detection circuit 23 and the second current detection circuit 24 are input to the control unit 15, and the control unit 15 controls the output control circuit 20 to prevent, for example, the occurrence of an overcurrent. ing.

  Specifically, the battery power supply 18 is configured by connecting four AA batteries (for example, 1.5 V) in series, and although not shown, it is loaded into the battery housing portion formed on the back surface of the apparatus main body 2 It has become possible. The type and number of the battery power source 18 are not limited to four AA batteries, and other commercially available dry batteries such as alkaline, nickel-cadmium and nickel-hydrogen batteries, and other rechargeable batteries such as lithium ion secondary batteries You may adopt a battery. In addition, when the battery voltage detection circuit 14 detects the voltage value of the battery power supply 18 and the battery voltage detection circuit 14 detects that the voltage value of the battery power supply 18 has dropped to the first threshold, the control unit 15 The decrease in voltage value is displayed as an image on the liquid crystal display unit 10 to notify the therapist or the like. In addition, when the voltage value of the battery power supply 18 reaches a second threshold value which is lower than the first threshold value, the control unit 15 turns off the power supply of the electrical stimulation device 1. The power supply circuit 13 is a circuit that is connected to the battery power supply 18 and supplies the control power to the control unit 15.

  As a treatment mode of the electrical stimulation device 1, there is a random mode that outputs a pulse whose frequency and / or intensity changes randomly. In addition to the random mode, the normal mode which outputs a pulse of constant frequency and constant intensity, the power assist mode which outputs a pulse of intensity proportional to the muscle action potential of the treatment site, the muscle of a site different from the treatment site External assist mode that outputs pulses with an intensity proportional to the action potential to the treatment target site, burst mode that periodically outputs a pulse with a constant frequency and a constant intensity for a fixed period periodically, an external sensor (pressure sensor, angle sensor, acceleration sensor, etc. One or more modes such as a sensor trigger mode for controlling on / off of pulse output by an input from) may be provided as a treatment mode of the electrical stimulation device 1.

  Next, a voltage waveform or a current waveform applied to the first electrical stimulation electrode 3 and the second electrical stimulation electrode 4 (hereinafter sometimes simply referred to as “electrode”) will be described by taking a voltage waveform as an example. As shown in FIG. 3A, an output period Ta in which a pulse is continuously applied to the electrode and a pause period Tb in which a pulse is not applied to the electrode are alternately repeated. In the output period Ta, as shown in FIG. 3B, a rectangular wave pulse (pulse width Tw) is applied to the electrode, and the frequency f of successive pulses is, for example, f1, f2 (<f1), f3 (> f1) It changes randomly like). Here, the probability that each value of the frequency f is set is set to be a predetermined probability distribution, and the predetermined probability distribution is a uniform distribution or a Gaussian distribution. That is, for a predetermined number of pulses continuously applied to the electrode, the frequency f of the pulse changes randomly based on a predetermined probability distribution.

FIG. 4A shows a uniform distribution, and the value that the pulse frequency f can take is (1-a) fc to (1 + a) fc centered on the center frequency (average value of the frequency f) fc. And each frequency f within this range is set with the same probability. This range may be set as appropriate, for example, in the range of 30% of the center frequency fc (a = 0.15), that is, in the range of 0.85 fc-1.15 fc.
FIG. 4 (b) shows a Gaussian distribution, and when the standard deviation of the frequency f of the set pulse is .sigma., For example, the range of. +-. 2 .sigma. Falls within. +-. 30% of the average value fc of the frequency f. It should be set to be

  Next, a method of setting the fluctuation range of the center frequency fc and the frequency f in the uniform distribution and the Gaussian distribution will be described. Here, in the case of uniform distribution, the variation range of frequency f is set by setting the value of ± a, and in the case of Gaussian distribution, the variation range of frequency f is set by setting the value of ± 2σ . The fluctuation range of the center frequency fc and the frequency f is selected by operating the operation switch unit 9 from the candidate values displayed on the liquid crystal display unit 10. As candidate values of the center frequency fc, for example, values of 1 Hz and 5 to 100 Hz (5 Hz intervals) are displayed. As a candidate value of the fluctuation range of the frequency f, for example, a value of ± 5% to ± 30% (± 5% interval) is displayed. Note that these candidate values are not limited to the illustrated values, and the intervals of the candidate values may be reduced to be set finely. The pulse width Tw can be set, for example, at a value of 0.1 to 1 ms.

  Next, a method of randomly setting the pulse frequency f will be described. In the case of the uniform distribution shown in FIG. 4A, the fluctuation value of the frequency f is determined using a function that creates a uniform distribution that is a function of the microcomputer standard, and the value obtained by adding the fluctuation value to the center frequency fc is a frequency Set as f. Further, in the case of the Gaussian distribution shown in FIG. 4B, a Gaussian distribution is created using a function for creating a uniform distribution that is a function of a microcomputer standard and the Box Mueller method, and the fluctuation value of the frequency f is determined. Then, a value obtained by adding the fluctuation value to the center frequency fc is set as the frequency f. Here, the Box Muller method is a method of generating a random variable according to a standard Gaussian distribution from random variables according to a uniform distribution. The fluctuation value is calculated for each period of the pulse using the function as described above to set the frequency f.

  When the frequency f of the pulse is set at random, the frequency f in one period Ta of FIG. 3A may be a uniform distribution or a Gaussian distribution, and two periods Ta or FIG. The frequency f in a plurality of periods Ta may be made to have a uniform distribution or a Gaussian distribution, such as a period Tg (including two periods Ta and a half period Ta). For the frequency f set using the function of the microcomputer standard, the probability distribution that the frequency f constitutes is not exactly the same as the uniform distribution or the Gaussian distribution because the number of data is limited, and the uniform distribution or Although it becomes an approximate distribution of a Gaussian distribution, the uniform distribution or the Gaussian distribution in the present invention includes such an approximate distribution.

  When setting the frequency f of the pulse at random, in the method of calculating the fluctuation value of the frequency f using the above function, it is necessary to calculate the fluctuation value for each cycle of the pulse, and the setting of the frequency f is It is conceivable that the time will not be in time. Therefore, a table in which data of the frequency f is arranged is created in advance and stored in the storage unit 16, and the data of the table of the storage unit 16 is sequentially referenced to set the frequency f. As described above, by referring to the data in the table, it is possible to set the frequency f faster than when calculating the fluctuation value for each cycle of the pulse, and the frequency f can be set by following the output of the pulse. It can be set randomly. When the operation switch unit 9 is operated to set the variation range of the center frequency fc and the frequency f, a table in which data of the frequency f is arranged may be created. The table may be stored in the internal memory of the control unit 15.

  Here, an example will be described in which the frequency f of the pulse is randomly set such that the frequency f in one period Ta in FIG. 3A becomes a uniform distribution or a Gaussian distribution. When setting the frequency f by calculating the fluctuation value for each cycle of the pulse, for example, f1, f2, f3,... Are set in a certain period Ta, and in the next period Ta, f2, f1, f3,. The setting pattern of the frequency f is different. On the other hand, when setting the frequency f with reference to data in the table, since the setting pattern of the frequency f is the same in a certain period Ta and the next period Ta, accurate random electrical stimulation with high repeatability Is feasible. Further, by setting the arrangement of data of the table appropriately, it is possible to set a more effective output pattern.

  Also, even if the pulse is applied to the treatment subject while adjusting the intensity by the operation of the adjustment knob 9b, and the maximum value of the intensity of the pulse can be set while confirming with the treatment subject, the electric stimulation device 1 is configured. Good. According to this configuration, since a pulse having an intensity exceeding the set maximum value is not output, it is possible to perform electrical stimulation in accordance with the condition and preference of the treatment subject.

  Next, an effect verification experiment when an electric stimulation is performed on a subject by the electric stimulation device 1 according to the present embodiment will be described with reference to FIG. In FIG. 5, a partial configuration of the electrical stimulation device 1 is omitted. As shown in FIG. 5, the right foot was fixed on the force plate 31 with the subject h sitting on the chair 30. The anode 3a, which is an electrode for electrical stimulation, was attached to the origin of the right intragastric muscle and the cathode 3b to the Achilles tendon. The shape of the anode 3a and the cathode 3b was a 50 mm × 50 mm square. After 5 seconds of resting baseline measurement, electric stimulation is performed by applying a pulse to the electrode for 5 seconds, and then 30 seconds of maintaining the resting state for 20 seconds is one trial, and subjective pain and pain immediately after the end of the trial. Discomfort was assessed using the NRS (Numerical Rating Scale). The NRS divides the straight line into 11 steps from “no pain (or no discomfort): 0” to “worst pain (or worst discomfort): 10” to present the subject with the current pain (or This is a method of evaluating pain (or discomfort) by showing a value corresponding to discomfort). In addition, the ankle plantar flexion torque was measured by the load sensor 32 provided on the force plate 31 for 5 seconds during the electrical stimulation. That is, it is an aim to quantify and compare the intensity of the electrical stimulation and the level of the exertion torque between the three conditions shown in the next section by calculating the difference of the plantar flexion torque at the time of the electrical stimulation from the resting baseline.

  The conditions of the electrical stimulation used in the experiment are as follows. As the electrical stimulation of the condition A, the central frequency fc is 40 Hz at the frequency f which is uniformly distributed in FIG. 4A, and the fluctuation range is ± 15% of fc, and the pulse whose frequency f changes randomly is Applied to the As the electrical stimulation of the condition B, with the center frequency fc of 40 Hz at the frequency f of the Gaussian distribution in FIG. 4B and ± 2σ as ± 15% of fc, a pulse whose frequency f changes randomly is used as an electrode Applied. As the electrical stimulation under the condition C, a pulse with a constant frequency f was applied to the electrode, and the frequency f was 40 Hz. The stimulation intensity of the electrical stimulation was 180% exercise threshold intensity, and 10 trials were performed for each of the conditions A, B, and C. The intensity of the stimulation itself and the total number of pulses in one trial under each of the conditions A, B, and C were the same. In addition, nine healthy young people (age 25.4 ± 2.8, height 171.3 ± 7.3 cm, weight 60.3 ± 9.3 kg) were included as subjects.

  With regard to the NRS evaluation value of pain, the effects of different conditions were examined repeatedly by one-way analysis of variance, and differences between conditions were analyzed using a multiple comparison test. As a result, the NRS evaluation value of pain is 3.3 ± 1.26 for condition A, 3.2 ± 0.87 for condition B, and 4.5 ± 1.91 for condition C. Yes, p value is p <0.05. From this result, it can be seen that the pain NRS shows significantly lower values in the conditions A and B as compared to the condition C.

  With regard to the NRS evaluation value of discomfort, the effects of differences in conditions were examined repeatedly by one-way analysis of variance, and differences between conditions were analyzed using a multiple comparison test. As a result, the NRS evaluation value of discomfort is 3.3 ± 1.89 for condition A, 3.4 ± 1.83 for condition B, and 4.3 ± 2.1 for condition C. And p value is p <0.08. As a result, compared with the condition C, the unpleasant NRS tends to have a low discomfort although there is no statistically significant difference in the conditions A and B.

  When the effects of different conditions were repeated on the plantar flexion torque value and examined by one-way analysis of variance, no statistical significance was found. However, in the case of condition A and condition B which are in the form of randomized pulse, the subject showing a tendency for the initial torque increase to have a good efficiency, and as shown in FIG. There were multiple subjects in which excessive torque increase (Tetanus contraction) was attenuated under Condition A and Condition B. FIG. 6 shows measurement of the plantar flexion torque when the stimulation intensity of the electrical stimulation is 148% exercise threshold intensity (indicated by a broken line b in FIG. 6) and 152% exercise threshold intensity (indicated by a solid line a in FIG. 6). FIG. 6 (a) shows the case of condition A, FIG. 6 (b) shows the case of condition B, and FIG. 6 (c) shows the case of condition C. In FIG. 6, a straight line indicated by a broken line shows the average value of the plantarflexion torque of 148% exercise threshold strength. From the above results, it is supposed that potentiation due to mobilization of the same motor unit caused by the electrical stimulation under condition C and strong contraction and pain in the muscle caused by high-intensity electrical stimulation are alleviated by randomizing the pulse frequency f. Conceivable.

  According to the electrical stimulation device 1 according to this embodiment, not only mobilizing a limited motor unit but mobilizing a wider range of motor units, it becomes closer to voluntary movement. As a result, it leads to the reduction of the feeling of fatigue. In addition, since pain and discomfort are less likely to occur, stronger electrical stimulation can be given, and improvement of the therapeutic effect can be expected. In addition, the output period Ta and the pause period Tb are alternately repeated, and the frequency of the pulse included in the plurality of output periods Ta has a uniform distribution or a Gaussian distribution, so that application is performed with the pause period Tb interposed appropriately. The probability distribution of the frequency of the pulse to be generated can be close to a uniform distribution or a Gaussian distribution in a strict sense. Therefore, pain and discomfort are less likely to occur, a stronger electrical stimulation can be given, and improvement of the therapeutic effect can be expected. In addition, the frequency of treatment can be increased, and the treatment effect and treatment efficiency can be improved. In addition, the therapeutic effect can be expanded by expanding the number of treatable subjects. The present invention can be applied to the case where the pulse is continuously output without providing the pause period Tb.

  In the above embodiment, the electrical stimulation in which the frequency f of the pulse is randomly changed has been described, but the frequency f of the pulse is fixed and the intensity of the pulse, for example, the pulse width, the current, and the voltage are randomly changed. The probability distribution of the intensity of the pulse may be uniform or Gaussian. For example, by changing at least one of the pulse width and the pulse height at random, the pulse intensity can be changed randomly. Even when the subject performs electrical stimulation in which the pulse frequency f is fixed and the pulse intensity is randomly changed, the subject performs electrical stimulation in which the pulse frequency f is randomly changed as in the above embodiment. Similarly to the above, it is possible to obtain the effects of reducing the feeling of fatigue and making it difficult to cause pain or discomfort.

  Here, when the pulse intensity is randomly changed based on the Gaussian distribution, the occurrence probability may be set to a low but very high intensity. Therefore, the control unit 15 of the electrical stimulation device 1 controls the intensity of the pulse to be equal to or less than a predetermined value that does not cause any problem even if it is applied to the treatment subject. According to this configuration, very strong electrical stimulation is not output, and safety is enhanced. Further, when the data of the pulse intensity is arranged in the table, the data of the intensity of the pulse arranged in the table can be made equal to or less than a predetermined value by removing the data of very high intensity. For this reason, when setting the intensity of the pulse with reference to the table, a very strong electrical stimulation is not output, and the safety is enhanced.

  In addition, even when the subject performs electrical stimulation in which the frequency f of the pulse and the intensity of the pulse are randomly changed based on uniform distribution or Gaussian distribution, a motor unit mobilized by the electrical stimulation as in the above embodiment. To the subject, and to avoid forced mobilization of the same motor unit with the same sense, the subject performs electrical stimulation with the pulse frequency f varied randomly. In the same manner as in the case of the present invention, it is possible to obtain the effects of reducing the feeling of fatigue and making it difficult to cause pain and discomfort.

  The present invention is not limited to the electrical stimulation devices described in the above embodiments, and can be applied to various electrical stimulation devices in general. For example, in the electric stimulation apparatus having the above-described power assist mode and external assist mode, the frequency f of the pulse can be randomly changed. Also, in an electrical stimulation device having the aforementioned sensor trigger mode, the frequency f and / or the intensity of the pulse can be randomly changed. Moreover, although the case of the low frequency was demonstrated in the above-mentioned embodiment, this invention is applicable also to the electrical stimulation apparatus using a medium frequency and an interference wave.

  Note that the electrical configuration of the electrical stimulation device is not limited to the block diagram described in FIG. 2 as long as the electrical stimulation output is subjected to a predetermined fluctuation related to the present invention.

  The subject having paralysis in the upper or lower limbs can be applied to an electrical stimulation apparatus used when performing exercise function training of a paralysis site.

DESCRIPTION OF SYMBOLS 1 electrical stimulation apparatus 2 apparatus main body 3 electrode for 1st electrical stimulation 3a, 3b electrode 4 electrode for 2nd electrical stimulation 4a, 4b electrode 5 1st electrode cable 6 2nd electrode cable 7 1st output connector 8 2nd output connector 9 Operation switch unit 10 liquid crystal display unit 11 LED display unit 12 pulse output means 13 power supply circuit 14 battery voltage detection circuit 15 control unit 16 memory unit 17 communication circuit 18 battery power supply 19 DC-DC converter 20 output control circuit 21 first output transformer 22 Second output transformer 23 First current detection circuit 24 Second current detection circuit 50 Tablet terminal

Claims (6)

  An electrode mounted on a living body, a pulse output unit for supplying a pulse to be applied to the electrode, and a control unit for controlling the pulse output unit, the control unit continuously applying a predetermined voltage to the electrode An electric stimulation apparatus, wherein the frequency and / or intensity of the pulse is randomly changed based on uniform distribution or Gaussian distribution for the number of the pulses.   An output period in which a plurality of the pulses are continuously output and a pause period in which the pulses are not output are alternately repeated, and the frequency and / or the intensity of the pulses included in the plurality of output periods have a uniform distribution or Gaussian The electrical stimulation device according to claim 1, characterized in that it has a distribution.   The storage unit stores a table in which data in which the frequency and / or intensity of the pulse randomly change is arranged is stored, the distribution of the data is uniform distribution or Gaussian distribution, and the control unit The electric stimulation device according to claim 1 or 2, wherein the frequency and / or the intensity of the pulse are set by sequentially referring to the data of.   The said control part controls the intensity | strength of the said pulse so that it may become below a predetermined value, The electrical stimulation apparatus in any one of the Claims 1-3 characterized by the above-mentioned.   The electrical stimulation device according to any one of claims 1 to 4, wherein the maximum value of the intensity of the pulse can be set while applying and confirming the pulse to the living body.   The control unit randomly changes the frequency of the pulse based on a Gaussian distribution, and the range of ± 2σ of the Gaussian distribution is a range of ± 30% of the average value of the frequency of the pulse. The electrical stimulation apparatus according to any one of claims 1 to 5.

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