WO2021193035A1 - Système d'électrostimulation - Google Patents

Système d'électrostimulation Download PDF

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Publication number
WO2021193035A1
WO2021193035A1 PCT/JP2021/009364 JP2021009364W WO2021193035A1 WO 2021193035 A1 WO2021193035 A1 WO 2021193035A1 JP 2021009364 W JP2021009364 W JP 2021009364W WO 2021193035 A1 WO2021193035 A1 WO 2021193035A1
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Prior art keywords
muscle
electrical stimulation
dominant
fast
fatigue
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PCT/JP2021/009364
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English (en)
Japanese (ja)
Inventor
中川　雄司
加央里 榎本
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テルモ株式会社
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Priority to JP2022509547A priority Critical patent/JPWO2021193035A1/ja
Publication of WO2021193035A1 publication Critical patent/WO2021193035A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation

Definitions

  • the present invention relates to an electrical stimulation system that applies electrical stimulation to body muscles and motor nerves to contract the muscles.
  • an intermittent pneumatic compression is widely used to prevent deep vein thrombosis (DVT), which is a perioperative complication such as surgery.
  • DVT deep vein thrombosis
  • an intermittent air compression device it is necessary to wrap a sleeve over the entire lower limb of the patient. Therefore, the use of intermittent air compression devices is restricted in patients with lower limb wounds or patients who have undergone lower limb surgery.
  • Patent Document 1 discloses a device that applies electrical stimulation to such muscles.
  • EMS Electric Muscle Stimulation: EMS
  • a relatively small area electrode is attached to a part of the patient's lower limbs. Therefore, the electrical stimulation device can be used even in patients who have wounds in the lower limbs or who have undergone surgery in the lower limbs.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide an electrical stimulation system capable of sustaining a muscle contraction effect for a long period of time.
  • the tasks are an electrical stimulator that applies electrical stimulus to at least one of the muscles and motor nerves of the body to contract the muscle, and a muscle fatigue detection device that detects fatigue of the muscle contracted by the electrical stimulator.
  • a control unit that executes control for changing at least one of the current and frequency of the electrical stimulus according to the degree of fatigue of the muscle detected by the muscle fatigue detection device. This is solved by the electrical stimulation system according to the present invention.
  • the muscle fatigue detection device detects fatigue of muscles contracted by the electrical stimulation device. Then, the control unit changes at least one of the current and frequency of the electrical stimulation according to the degree of muscle fatigue detected by the muscle fatigue detection device. According to this, the control unit can switch the muscle contracted by the electric stimulator from the tired muscle to the non-fatigue muscle. In other words, the control unit can stop the contraction of the tired muscle and start the contraction of the non-fatigue muscle. Therefore, the electrical stimulation system according to the present invention can sustain the muscle contraction effect for a long period of time.
  • the electrical stimulation system according to the present invention enhances the effect of increasing deep venous blood flow, prevents deep venous thrombosis, and prevents venous diseases of the lower limbs.
  • the effect of improving arterial disease can be obtained.
  • the muscle fatigue detection device has a myoelectric detection electrode that detects a muscle action potential generated from a muscle fiber due to the contraction of the muscle, and the control unit is the control unit. It is characterized in that the degree of fatigue of the muscle is determined based on the muscle action potential detected by the myoelectric detection electrode.
  • the muscle fatigue detection device detects the muscle action potential generated from the muscle fiber by the contraction of the muscle by the myoelectric detection electrode, so that the contraction of the muscle fiber of the muscle is more accurate. Can be detected with.
  • the control unit can determine and determine the degree of muscle fatigue with higher accuracy based on the muscle action potential detected by the myoelectric detection electrode.
  • the electrical stimulation system preferably further includes a plurality of electrode pads arranged on the surface of the body, the myoelectric detection electrode is provided on the electrode pad, and the electrical stimulation device is the electrode.
  • the stimulating electrode provided on the pad and supplying electricity to at least one of the muscle and the motor nerve is provided, and the muscle fatigue detection device is provided with the stimulating electrode in which the electricity does not flow among the plurality of electrode pads. It is characterized in that the muscle activity potential is detected by the myoelectricity detecting electrode in the electrode pad.
  • the electrical stimulation system further includes a plurality of electrode pads arranged on the surface of the body.
  • the myoelectric detection electrode is provided on the electrode pad.
  • the electrical stimulator has a stimulating electrode that supplies electricity to at least one of the muscles and motor nerves.
  • the stimulation electrode is provided on the electrode pad.
  • the muscle fatigue detection device detects the muscle action potential by the myoelectric detection electrode in the electrode pad provided with the stimulation electrode through which electricity does not flow among the plurality of electrode pads. As a result, it is possible to prevent the electrical signal of the muscle action potential detected by the myoelectric detection electrode from interfering with the electrical signal of the electrical stimulation flowing through the stimulation electrode.
  • the muscle fatigue detection device can detect the muscle action potential with the myoelectric detection electrode with higher accuracy.
  • the muscle fatigue detection device has a muscle sound sensor that detects minute vibrations of the muscle generated by the contraction of the muscle, and the control unit controls the muscle sound. It is characterized in that the degree of fatigue of the muscle is determined based on the minute vibration detected by the sensor.
  • the muscle fatigue detection device detects minute vibrations of muscles generated by contraction of muscles by a muscle sound sensor. Therefore, it is possible to prevent the electrical signal of the electrical stimulus flowing through the stimulation electrode from being mixed as an artifact (noise) in the electrical signal related to the minute vibration of the muscle detected by the muscle sound sensor. As a result, the muscle fatigue detection device can detect the muscle contraction by detecting the minute vibration of the muscle with the muscle sound sensor with higher accuracy.
  • the muscle is a fast muscle dominant muscle
  • the control unit is a fast muscle dominant muscle by changing at least one of the current and the frequency. It is characterized in that the superiority of the contraction is switched from the fast muscle to the slow muscle.
  • the control unit changes at least one of the current and frequency of the electrical stimulation according to the degree of muscle fatigue detected by the muscle fatigue detection device, thereby predominantly fast muscles.
  • the control unit is superior in exerting instantaneous force and easily fatigued compared to slow muscles, and is superior in exerting endurance and less likely to fatigue compared to fast muscles.
  • the muscles include a muscle predominantly in the first speed muscle and a muscle predominantly in the second speed muscle existing at a position different from the muscle predominantly in the first speed muscle.
  • the control unit is characterized in that the electrical stimulation to the muscle predominantly in the first fast muscle is stopped and the electrical stimulation to the muscle predominantly in the second fast muscle is started.
  • the control unit stops the electrical stimulation of the muscles predominantly in the first speed muscle and the second speed muscle according to the degree of muscle fatigue detected by the muscle fatigue detection device. Initiate electrical stimulation of the dominant muscle. In this way, the control unit switches the electrical stimulation from the muscle predominant in the first speed muscle to the muscle predominant in the second speed muscle existing at a position different from the muscle predominant in the first speed muscle. Therefore, after the fatigue of the muscle predominantly in the first speed muscle occurs, the muscle predominantly in the second speed muscle can continue contraction. Thereby, even when the electric stimulation is applied to the muscle in which the fast muscle is dominant, the electric stimulation system according to the present invention can maintain the contraction effect of the muscle for a long time.
  • the muscle includes a muscle predominantly fast muscle and a muscle predominantly slow muscle
  • the control unit changes at least one of the current and the frequency. This is characterized in that the electrical stimulation to the fast muscle dominant muscle is stopped and the electrical stimulation to the slow muscle dominant muscle is started.
  • the control unit changes at least one of the current and frequency of the electrical stimulation according to the degree of muscle fatigue detected by the muscle fatigue detection device, thereby predominantly fast muscles.
  • the electrical stimulation to the muscles of the slow muscle is stopped and the electrical stimulation to the muscles predominantly slow muscles is started.
  • the control unit switches the electrical stimulation from the muscle predominantly fast muscle to the muscle predominantly slow muscle. Therefore, after fatigue of the fast muscle dominant muscle occurs, the slow muscle dominant muscle can continue contraction for a long time.
  • the electrical stimulation system according to the present invention can more reliably sustain the contraction effect of muscles for a long period of time.
  • the electrical stimulation system preferably further includes a flow meter that detects the flow rate of blood flowing through the body, and the control unit further responds to a change in the flow rate detected by the flow meter. It is characterized by changing at least one of the current and the frequency of the stimulus.
  • the control unit has a current of electrical stimulation according to the degree of muscle fatigue detected by the muscle fatigue detection device and the change in the flow rate of blood detected by the flow meter. And change at least one of the frequencies. Therefore, the control unit can switch the muscles to be contracted by the electric stimulator based on the change in the blood flow rate as well as the degree of muscle fatigue.
  • the electrical stimulation system according to the present invention can maintain the contractile effect of muscles for a long period of time, further enhance the effect of increasing deep vein blood flow, prevent deep vein thrombosis, or cause venous disease of the lower limbs. Further improvement effect of arterial disease can be obtained.
  • the electrical stimulation system according to the present invention is preferably further provided with an intermittent air compression device that intermittently compresses the body.
  • the contractile effect of muscles can be maintained for a long period of time, the effect of increasing deep vein blood flow is further enhanced, the prevention of deep vein thrombosis, venous disease of lower limbs or arteries. Further improvement effect of the disease can be obtained.
  • an electrical stimulation system capable of sustaining a muscle contraction effect for a long period of time.
  • FIG. 1 is a schematic view showing an electrical stimulation system according to the first embodiment of the present invention.
  • FIG. 2 is a block diagram showing a main configuration of the electrical stimulation system according to the present embodiment.
  • FIG. 3 is an enlarged view showing an enlarged electrode pad of the present embodiment.
  • the electrical stimulation system 2 includes a main body 3, an electrical stimulation device 4, a muscle fatigue detection device 5, and an electrode pad 6.
  • the electrical stimulation system 2 does not necessarily have to include the electrode pad 6.
  • the main body 3 has a control unit 31 and a display unit 32.
  • the control unit 31 is electrically connected to the electrical stimulator 4 and the muscle fatigue detection device 5 via a wire rod 68.
  • the control unit 31 transmits a control signal to the electrical stimulator 4 to control the operation of the electrical stimulator 4.
  • the control unit 31 receives a detection signal from the muscle fatigue detection device 5.
  • the control unit 31 may be electrically connected to the electrical stimulator 4 and the muscle fatigue detection device 5 by wireless rather than by wire.
  • the display unit 32 displays, for example, the muscle action potential detected by the muscle fatigue detection device 5 as an electromyogram, or detects it by the muscle fatigue detection device 5A (see FIG. 4).
  • the minute vibrations that have been made are displayed as an electromyogram.
  • the display unit 32 does not necessarily have to be provided. Further, the display unit 32 does not necessarily have to be integrally provided with the main body 3, and may be, for example, an external display connected to the main body 3.
  • the electrical stimulator 4 has an electrical stimulus signal generation unit 41 and a stimulus electrode 42.
  • the electrical stimulation signal generation unit 41 generates an electrical signal that applies electrical stimulation to at least one of the muscles and motor nerves of the body based on the control signal transmitted from the control unit 31.
  • the signal generated by the electrical stimulation signal generation unit 41 is transmitted to the stimulation electrode 42.
  • electricity is supplied to at least one of the muscles and motor nerves of the body via the stimulation electrode 42.
  • the muscles of the body are stimulated by electricity and contract. That is, the electrical stimulator 4 supplies electricity based on the signal generated by the electrical stimulation signal generation unit 41 to at least one of the muscles and motor nerves of the body via the stimulation electrode 42, and the muscles and motor nerves of the body. Apply electrical stimulation to at least one of the muscles of the body to contract.
  • the stimulation electrode 42 is provided on the electrode pad 6.
  • the electrode pad 6 is arranged, for example, by being attached to the surface of the body.
  • the electrical stimulation system 2 shown in FIG. 1 has four electrode pads 6, that is, a first electrode pad 61, a second electrode pad 62, a third electrode pad 63, and a fourth electrode pad 64.
  • the stimulation electrode 42 is provided on each of the four electrode pads 6.
  • the number of electrode pads 6 is not limited to four, and may be two or three, or five or more.
  • the control unit 31 includes a stimulation electrode 42 of the first electrode pad 61, a stimulation electrode 42 of the second electrode pad 62, a stimulation electrode 42 of the third electrode pad 63, and a stimulation electrode 42 of the fourth electrode pad 64. Electricity is not passed at the same time.
  • the control unit 31 may use the stimulation electrode 42 of the first electrode pad 61, the stimulation electrode 42 of the second electrode pad 62, the stimulation electrode 42 of the third electrode pad 63, and the stimulation electrode of the fourth electrode pad 64.
  • the electrical stimulation system 2 enhances the effect of increasing deep vein blood flow when used on the lower limbs of a patient, prevents deep vein thrombosis, and improves venous disease or arterial disease of the lower limbs. The effect can be enhanced.
  • the muscle fatigue detection device 5 has a myoelectric detection electrode 51.
  • a plurality of myoelectric detection electrodes 51 are provided on the electrode pads 6.
  • the myoelectric detection electrode 51 is provided on each of the four electrode pads 6 (first electrode pad 61, second electrode pad 62, third electrode pad 63, and fourth electrode pad 64).
  • the muscle fatigue detecting device 5 detects the fatigue of the muscle contracted by the electricity supplied from the electrical stimulating device 4. Then, the control unit 31 determines and determines the degree of muscle fatigue detected by the muscle fatigue detection device 5. Specifically, the myoelectric detection electrode 51 detects the muscle action potential generated from the muscle fiber (also referred to as “muscle fiber”) due to the contraction of the muscle and transmits it to the control unit 31. Then, the control unit 31 determines and determines the degree of muscle fatigue based on the muscle action potential detected by the myoelectric detection electrode 51. A specific example in which the control unit 31 determines the degree of muscle fatigue will be described later.
  • the muscle fatigue detection device 5 detects the muscle action potential by the myoelectric detection electrode 51 in the electrode pad 6 provided with the stimulation electrode 42 in which electricity does not flow among the plurality of (four in the present embodiment) electrode pads 6. ..
  • the muscle fatigue detection device 5 uses the stimulation electrode 42 and the fourth electrode of the third electrode pad 63.
  • the muscle activity potential is detected by at least one of the stimulation electrodes 42 of the electrode pad 64.
  • the muscle fatigue detection device 5 uses the stimulation electrode 42 of the second electrode pad 62, the stimulation electrode 42 of the third electrode pad 63, and the fourth electrode.
  • the muscle activity potential is detected by at least one of the stimulation electrodes 42 of the electrode pad 64.
  • the muscle fatigue detection device 5 can detect the muscle action potential with the myoelectric detection electrode 51 with higher accuracy.
  • FIG. 4 is a block diagram showing a main configuration of an electrical stimulation system according to a modified example of the present embodiment.
  • FIG. 5 is an enlarged view showing an enlarged electrode pad of this modified example.
  • the electrical stimulation system 2A according to this modification includes a main body 3 (see FIG. 1), an electrical stimulation device 4, a muscle fatigue detection device 5A, and an electrode pad 6.
  • the main body 3, the electrical stimulator 4, and the electrode pad 6 are as described above with respect to FIGS. 1 to 3.
  • the muscle fatigue detection device 5A has a muscle sound sensor 52. That is, the muscle fatigue detection device 5A of this modified example has a structure in which the myoelectric detection electrode 51 of the muscle fatigue detection device 5 described above with respect to FIGS. 1 to 3 is replaced with the muscle sound sensor 52.
  • the electrical stimulation system 2A according to the present modification is different from the electrical stimulation system 2 according to the present embodiment described above with respect to FIGS. 1 to 3.
  • the muscle sound sensor 52 detects the minute vibration of the muscle generated by the contraction of the muscle as a muscle sound, converts it into an electric signal, and transmits it to the control unit 31.
  • Examples of the muscle sound sensor 52 include an acceleration sensor and a microphone.
  • the microphone is not particularly limited, and may be, for example, a MEMS microphone or an electret condenser microphone (ECM).
  • the control unit 31 of this modified example determines and determines the degree of muscle fatigue based on the electric signal related to the minute vibration detected by the muscle sound sensor 52.
  • the muscle fatigue detection device 5A of this modified example detects the minute vibration of the muscle generated by the contraction of the muscle by the muscle sound sensor 52. Therefore, it is possible to prevent the electrical signal of the electrical stimulus flowing through the stimulation electrode 42 from being mixed as an artifact (noise) in the electrical signal related to the minute vibration of the muscle detected by the muscle sound sensor 52. As a result, the muscle fatigue detection device 5A can detect the muscle contraction by detecting the minute vibration of the muscle with the muscle sound sensor 52 with higher accuracy.
  • an electrical stimulation device that applies electrical stimulation to muscles is used to prevent deep vein thrombosis (DVT), which is a perioperative complication such as surgery
  • electrical stimulation is performed. May cause muscle fatigue. That is, deep vein thrombosis may occur until about 24 hours after surgery. Therefore, in order to prevent deep vein thrombosis, it is desirable that the electrical stimulation device continuously applies electrical stimulation to the patient's muscles and motor nerves until about 24 hours have passed after the operation. However, if the electrical stimulation device continuously applies electrical stimulation to the patient's muscles and motor nerves until about 24 hours after surgery, muscle fatigue may occur. Then, the muscle contraction effect may not be sustained for a long period of time, and the effect of increasing deep venous blood flow may be reduced.
  • the control unit 31 determines the current and frequency of the electrical stimulation according to the degree of muscle fatigue detected by the muscle fatigue detection device 5. Perform control to change at least one. Specifically, in the electrical stimulation system 2 described above with respect to FIGS. 1 to 3, the control unit 31 determines the degree of muscle fatigue based on the muscle action potential detected by the myoelectric detection electrode 51, and determines the degree of muscle fatigue. Change at least one of the electrical stimulation currents and frequencies depending on the degree of fatigue. Further, in the electrical stimulation system 2A described above with respect to FIGS. 4 and 5, the control unit 31 determines the degree of muscle fatigue based on the minute vibration detected by the muscle sound sensor 52, and corresponds to the degree of muscle fatigue. And change at least one of the current and frequency of the electrical stimulation.
  • the control unit 31 can switch the muscle contracted by the electrical stimulation device 4 from the fatigued muscle to the non-fatigue muscle. .. In other words, the control unit 31 can stop the contraction of the tired muscle and start the contraction of the non-fatigue muscle. Therefore, the electrical stimulation systems 2 and 2A can sustain the muscle contraction effect for a long period of time. As a result, even in patients with lower limb wounds or lower limb surgery, the electrical stimulation systems 2 and 2A enhance the effect of increasing deep venous blood flow, prevent deep venous thrombosis, and prevent venous diseases of the lower limbs. The effect of improving arterial disease can be obtained.
  • the muscle fatigue detection device 5 detects the muscle action potential generated from the muscle fiber due to the contraction of the muscle by the myoelectric detection electrode 51, thereby causing the muscle.
  • the contraction of muscle fibers can be detected with higher accuracy.
  • the control unit 31 can determine and determine the degree of muscle fatigue with higher accuracy based on the muscle action potential detected by the myoelectric detection electrode 51.
  • the electrical signal of the electrical stimulation flowing through the stimulation electrode 42 is an artifact (noise) in the electrical signal related to the minute vibration of the muscle detected by the muscle sound sensor 52. It is possible to suppress the mixing as. As a result, the muscle fatigue detection device 5 can detect the muscle contraction by detecting the minute vibration of the muscle with the muscle sound sensor 52 with higher accuracy.
  • FIG. 6 is a schematic diagram illustrating a first specific example of the operation of the electrical stimulation system according to the present embodiment.
  • FIG. 7 is a flowchart illustrating a first specific example of the operation of the electrical stimulation system according to the present embodiment.
  • FIG. 8 is a graph obtained by frequency analysis of the electromyogram before muscle fatigue.
  • FIG. 9 is a graph obtained by frequency analysis of the electromyogram after muscle fatigue.
  • the electrode pad 6 including the stimulation electrode 42 and the myoelectric detection electrode 51 is attached to the body surface in the vicinity of the gastrocnemius muscle.
  • the gastrocnemius muscle is the muscle 71 in which the fast muscle is dominant.
  • “Fast muscle dominant muscle” includes a relatively high proportion of fast muscles and a relatively low proportion of slow muscles. Compared to slow muscles, fast muscles have a faster contraction speed, are excellent in exerting instantaneous force, and have the property of being easily fatigued when contraction is repeated. Compared to fast muscles, slow muscles have a slower contraction rate, are excellent in exerting endurance, and have the property of being less likely to get tired even after repeated contractions.
  • the "slow muscle dominant muscle” described later includes a relatively high proportion of slow muscles and a relatively low proportion of fast muscles. For example, when the ratio of fast muscles is 55% or more, the muscles are “fast muscle dominant muscles”. Further, for example, when the ratio of slow muscles is 55% or more, the muscles are "slow muscle dominant muscles”.
  • the ratio of fast muscles and slow muscles that define "dominance" is an example, and is not limited to this.
  • step S1 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and the fast muscle in the initial state.
  • the electromyogram of the dominant muscle 71 is measured (time T0).
  • the "initial state” refers to the state before electrical stimulation is applied to the muscles.
  • the graph obtained by frequency analysis of the electromyogram at time T0 is as shown in FIG. 8, for example.
  • the graph obtained by frequency analysis of the electromyogram at time T0 is not limited to the graph shown in FIG.
  • the frequency analysis method is not particularly limited, and may be, for example, a fast Fourier transform (FFT), an autoregressive model (AR), or a maximum entropy method (MEM). You may.
  • FIG. 8 shows an example of performing a fast Fourier transform (FFT) of an electromyogram at time T0.
  • step S2 the electrical stimulator 4 generates an electrical signal for electrical stimulation by the electrical stimulation signal generation unit 41, and at least one of the fast muscle dominant muscle 71 and the motor nerve via the stimulation electrode 42. Electricity is supplied to the crab and the electrical stimulation of the muscle 71, which is dominant in the fast muscle, is started.
  • step S3 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and measures the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation.
  • the graph obtained by frequency analysis of the electromyogram at time Tx is as shown in FIG. 9, for example.
  • the graph obtained by frequency analysis of the electromyogram at time Tx is not limited to the graph shown in FIG. Further, FIG. 9 shows an example in which the fast Fourier transform (FFT) of the electromyogram at time Tx is performed.
  • FFT fast Fourier transform
  • step S4 the control unit 31 determines whether or not a predetermined time has elapsed since the electrical stimulator 4 started electrical stimulation of the fast muscle-dominant muscle 71 (step S2).
  • the "predetermined time" in step S4 is, for example, about 24 hours.
  • the control unit 31 ends the electrical stimulation of the fast muscle dominant muscle 71. do.
  • step S5 the control unit 31 uses the fast muscle. It is determined whether or not the dominant muscle 71 is fatigued.
  • the electric stimulation current is more likely to flow to the fast muscle than to the slow muscle. Therefore, when electrical stimulation is applied to muscles, first, lactate exercise, which is exercise by fast muscles, is performed, and then aerobic exercise, which is exercise by slow muscles, is performed. In other words, as described above, the fast muscle has the property of being more likely to get tired when the contraction is repeated than the slow muscle. Gradually increase.
  • the frequency band of the muscle action potential generated from the muscle fiber of the fast muscle is, for example, about 20 Hz or more and about 45 Hz or less.
  • the frequency band of the muscle action potential generated from the muscle fiber of the intermediate muscle is, for example, about 46 Hz or more and about 80 Hz or less.
  • the frequency band of the muscle action potential generated from the muscle fiber of the slow muscle is, for example, about 81 Hz or more and 350 Hz or less.
  • the intermediate frequency 81 when the fast muscles begin to fatigue and the fast muscle usage rate gradually decreases and the slow muscle usage rate gradually increases, the intermediate frequency 81 as a representative value becomes Move to the low frequency band.
  • Factors that cause the intermediate frequency 81 to shift to the low frequency band include, for example, various factors such as synchronization of motor units, increase and decrease of motor unit mobilization, changes in muscle fiber conduction velocity, and changes in intramuscular pressure.
  • Another factor that causes the intermediate frequency 81 to shift to the low frequency band is that, as described above, when the fast muscles showing the relatively high frequency band are first mobilized and begin to fatigue due to repeated contractions, the intermediate frequency 81 is relatively low. Increased recruitment of slow muscles in the frequency band.
  • control unit 31 determines that muscle fatigue has occurred when the intermediate frequency 81 is equal to or less than the threshold value 82 or less than the threshold value 82.
  • An average frequency may be used as a representative value instead of the intermediate frequency.
  • control unit 31 may determine the threshold value 82 according to the electromyogram of the fast muscle dominant muscle 71 in the initial state measured by the myoelectric detection electrode 51 in step S1.
  • control unit 31 may perform muscles according to the ratio of the total value of the power spectra of at least one of the fast muscles and the slow muscles to the total value of the power spectra of the fast muscles, the intermediate muscles, and the slow muscles. It may be determined whether or not the fatigue is occurring. For example, when the ratio of the total value of the power spectrum of the fast muscle to the total value of the power spectrum of the fast muscle, the intermediate muscle, and the slow muscle becomes less than or equal to the threshold value, the control unit 31 causes muscle fatigue. May be determined to have occurred.
  • the control unit 31 causes muscle fatigue. It may be determined that it has occurred.
  • the method for determining whether or not muscle fatigue has occurred is not limited to the above-mentioned determination method, and may be another determination method.
  • step S5 determines that the fast muscle dominant muscle 71 is not fatigued
  • step S6 determines the control unit 31 determines the output current amount (that is, the current) of the electrical stimulation. ) Is increased to improve the contractile force of the fast muscles among the muscles 71 in which the fast muscles are dominant.
  • step S7 the control unit 31 determines whether or not the contractile force of the fast muscle among the fast muscle dominant muscle 71 is improved.
  • step S7 the control unit 31 determines whether or not the fatigue of the fast muscle dominant muscle 71 has occurred, that is, whether or not the fatigue of the fast muscle dominant muscle 71 has recovered. to decide.
  • An example of a method for determining whether or not muscle fatigue has occurred is as described above.
  • step S9 the muscle fatigue detection device 5 uses the myoelectric detection electrode 51.
  • the action potential of the fast muscle dominant muscle 71 is detected, and the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation is measured (time Tx).
  • step S7: NO the control unit 31 changes the frequency of the electrical stimulation and switches the superiority of contraction from the fast muscle to the slow muscle among the fast muscle dominant muscles 71.
  • step S6 the control unit 31 aims to improve the contractile force of the fast muscle among the fast muscle dominant muscle 71 by changing the electric stimulation current. Further, in step S8, the control unit 31 switches the superiority of contraction from the fast muscle to the slow muscle among the fast muscle dominant muscles 71 by changing the frequency of the electrical stimulation.
  • step S9 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and measures the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation.
  • step S10 the control unit 31 determines whether or not a predetermined time has elapsed since the electrical stimulator 4 started electrical stimulation of the fast muscle-dominant muscle 71 (step S2). When a predetermined time has elapsed since the electrical stimulator 4 started the electrical stimulation of the fast muscle dominant muscle 71 (step S10: YES), the control unit 31 ends the electrical stimulation of the fast muscle dominant muscle 71. do. On the other hand, if a predetermined time has not elapsed since the electrical stimulator 4 started the electrical stimulation of the fast muscle dominant muscle 71 (step S10: NO), the muscle fatigue detection device 5 described above with respect to step S9. Make the measurement.
  • the control unit 31 exerts the endurance as compared with the fast muscles from the fast muscles which are excellent in exerting the instantaneous force as compared with the slow muscles and are easily fatigued. Switch the superiority of contraction to slow muscles that are excellent and less likely to fatigue. Therefore, after fatigue of the fast muscles of the fast muscles 71 is generated, the slow muscles of the fast muscles 71 can continue to contract for a long time. Thereby, even when the electrical stimulation is applied to the muscle 71 in which the fast muscle is dominant, the electrical stimulation system 2 can maintain the contraction effect of the muscle for a long time.
  • the graph obtained by frequency analysis of the mechanomyogram before muscle fatigue corresponds to, for example, FIG.
  • a graph obtained by frequency analysis of the mechanomyogram after muscle fatigue corresponds to, for example, FIG.
  • the operation and the like of the other electrical stimulation system 2A are the same as the operation and the like of the electrical stimulation system 2 described above.
  • FIG. 10 is a schematic diagram illustrating a second specific example of the operation of the electrical stimulation system according to the present embodiment.
  • 11 and 12 are flowcharts illustrating a second specific example of the operation of the electrical stimulation system according to the present embodiment.
  • the electrode pad 6 including the stimulation electrode 42 and the myoelectric detection electrode 51 is attached to the body surface in the vicinity of the gastrocnemius muscle, the fibula muscle, and the tibialis muscle.
  • the gastrocnemius muscle is the muscle 71 in which the first fast muscle is dominant.
  • the peroneal muscle is the muscle 72 in which the second fast muscle is dominant.
  • the tibialis anterior is the muscle 73 in which the third speed muscle is dominant.
  • step S11 the muscle fatigue detection device 5 detects the muscle action potential of the muscle 71 in which the first speed muscle is dominant by the myoelectric detection electrode 51, and the first speed muscle is dominant in the initial state.
  • the electromyogram of the muscle 71 of the muscle 71 is measured (time T0).
  • step S12 the electrical stimulator 4 generates an electrical signal for electrical stimulation by the electrical stimulation signal generation unit 41, and the first-speed muscle dominant muscle 71 and the motor nerve are generated via the stimulation electrode 42. Electricity is supplied to at least one of them, and electrical stimulation of the muscle 71 in which the first fast muscle is dominant is started.
  • step S13 the muscle fatigue detection device 5 detects the muscle action potential of the first speed muscle dominant muscle 71 by the myoelectric detection electrode 51, and the muscle 71 of the first speed muscle dominant muscle 71 during electrical stimulation. Measure the electromyogram (time Tx).
  • step S14 the control unit 31 determines whether or not a predetermined time has elapsed since the electrical stimulator 4 started the electrical stimulation of the muscle 71 in which the first speed muscle is dominant (step S12).
  • a predetermined time has elapsed since the electric stimulator 4 started the electric stimulation of the muscle 71 having the dominant first speed muscle (step S14: YES)
  • the control unit 31 of the muscle 71 having the dominant first speed muscle End the electrical stimulation.
  • step S15 the control unit 31 It is determined whether or not the fatigue of the muscle 71, which is dominant in the first speed muscle, is occurring.
  • An example of a method for determining whether or not muscle fatigue has occurred is as described above with respect to FIGS. 6 to 9.
  • the operations of steps S11 to S15 are the same as the operations of steps S1 to S5 described above with respect to FIG. 7.
  • step S15 NO
  • the muscle fatigue detection device 5 performs the above-mentioned measurement with respect to step S13.
  • the control unit 31 determines that the first-speed muscle-dominant muscle 71 is fatigued (step S15: YES)
  • step S16 the control unit 31 determines that the output current amount of the electrical stimulation is increased. The number is increased to improve the contractile force of the fast muscle among the muscles 71 in which the first fast muscle is dominant.
  • the control unit 31 may change the frequency of the electrical stimulation in order to improve the contractile force of the slow muscle among the muscles 71 in which the first fast muscle is dominant, if necessary.
  • step S17 the control unit 31 determines whether or not the contractile force of the muscle 71, which is dominant in the first fast muscle, is improved. That is, in step S17, as described above with respect to step S15, the control unit 31 has recovered whether or not the fatigue of the first-speed muscle-dominant muscle 71 has occurred, that is, the fatigue of the first-speed muscle-dominant muscle 71 has recovered. Judge whether or not. An example of a method for determining whether or not muscle fatigue has occurred is as described above.
  • step S19 the muscle fatigue detection device 5 uses the myoelectric detection electrode 51 to make the first.
  • the action potential of the fast muscle dominant muscle 71 is detected, and the electromyogram of the first fast muscle dominant muscle 71 during electrical stimulation is measured (time Tx).
  • step S17: NO the contraction force of the first-speed muscle-dominant muscle 71 is not improved due to severe fatigue of the first-speed muscle-dominant muscle 71.
  • the control unit 31 stops the electrical stimulation of the first-speed muscle-dominant muscle 71 and starts the electrical stimulation of the second-speed muscle-dominant muscle 72.
  • the medical worker applies electrical stimulation to the muscle 71 predominantly in the first fast muscle while monitoring the degree of fatigue of the muscle 71 predominantly in the first fast muscle on the display unit 32 (see FIG. 1). It may be stopped, the optimum muscle (muscle 72 in which the second fast muscle is dominant in step S18) is selected, and electrical stimulation may be applied.
  • the control unit 31 improves the contractile force of the muscle 71 predominantly in the first speed muscle by changing the current of the electrical stimulation and changing the frequency of the electrical stimulation as needed. Aim.
  • step S18 the control unit 31 stops the electrical stimulation of the first-speed muscle-dominant muscle 71, and at the same time, the second-speed muscle-dominant muscle 72 existing at a position different from the first-speed muscle-dominant muscle 71. Start electrical stimulation to.
  • step S24 the control unit 31 stops the electrical stimulation of the second-speed muscle-dominant muscle 72 and starts the electrical stimulation of the third-speed muscle-dominant muscle 73.
  • the medical worker applies electrical stimulation to the muscle 72 having the dominant second speed muscle 72 while monitoring the degree of fatigue of the muscle 72 having the dominant second speed muscle 72 with the display unit 32 (see FIG. 1). It may be stopped, the optimum muscle (muscle 73 predominantly in the third speed muscle in step S24) is selected, and electrical stimulation may be applied.
  • step S22 the control unit 31 improves the contractile force of the muscle 72 predominantly in the second speed muscle by changing the current of the electrical stimulation and changing the frequency of the electrical stimulation as needed. Aim. Further, in step S24, the control unit 31 stops the electrical stimulation to the muscle 72 having the dominant second speed muscle, and the muscle 73 having the dominant third speed muscle at a position different from the muscle 72 having the dominant second speed muscle. Start electrical stimulation to.
  • steps S25 and S26 are the same as the operations of steps S13 and S14.
  • the control unit 31 electrically stimulates the muscle 71 in which the first speed muscle is dominant to the muscle 72 in which the second speed muscle is dominant, which exists at a position different from the muscle 71 in which the first speed muscle is dominant. Switch. Therefore, after the fatigue of the first-speed muscle-dominant muscle 71 occurs, the second-speed muscle-dominant muscle 72 can continue to contract. This is also the case where the control unit 31 switches the electrical stimulation from the muscle 72 in which the second speed muscle is dominant to the muscle 73 in which the muscle 72 is dominant in the second speed muscle and exists at a position different from the muscle 72 in which the second speed muscle is dominant. The same is true. As a result, even when the electrical stimulation is applied to the muscles 71, 72, 73 in which the fast muscles are dominant, the electrical stimulation system 2 according to the present embodiment can maintain the contraction effect of the muscles for a long time. ..
  • step S24 the control unit 31 stops the electrical stimulation to the muscle 72 in which the second speed muscle is dominant, and the third speed is present at a position different from the muscle 72 in which the second speed muscle is dominant. Electrical stimulation of muscle-dominant muscle 73 is initiated.
  • the operation of step S24 is not limited to this.
  • the control unit 31 stops the electrical stimulation of the second-speed muscle-dominant muscle 72, and the first-speed muscle-dominant muscle 71 exists at a position different from that of the second-speed muscle-dominant muscle 72.
  • the electrical stimulation to the muscle 71 may be started, and the electrical stimulation to the muscle 71 in which the first fast muscle is dominant may be applied again. Even in this case, the same effect as that of the above-described specific example can be obtained.
  • FIG. 13 is a schematic diagram illustrating a third specific example of the operation of the electrical stimulation system according to the present embodiment.
  • FIG. 14 is a flowchart illustrating a third specific example of the operation of the electrical stimulation system according to the present embodiment.
  • the electrode pad 6 including the stimulation electrode 42 and the myoelectric detection electrode 51 is attached to the body surface in the vicinity of the gastrocnemius muscle and the soleus muscle.
  • the gastrocnemius muscle is the fast muscle dominant muscle 71.
  • the soleus muscle is the slow muscle dominant muscle 74.
  • the “slow muscle dominant muscle” is as described above with respect to FIGS. 6 to 9.
  • step S31 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and the fast muscle dominant muscle 71 in the initial state.
  • the electromyogram is measured (time T0).
  • step S32 the electrical stimulator 4 generates an electrical signal for electrical stimulation by the electrical stimulation signal generation unit 41, and at least one of the fast muscle dominant muscle 71 and the motor nerve via the stimulation electrode 42. Electricity is supplied to the crab and the electrical stimulation of the muscle 71, which is dominant in the fast muscle, is started.
  • step S33 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and measures the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation. (Time Tx).
  • step S34 the control unit 31 determines whether or not a predetermined time has elapsed since the electrical stimulator 4 started electrical stimulation of the fast muscle-dominant muscle 71 (step S32).
  • step S34: YES the control unit 31 ends the electrical stimulation of the fast muscle dominant muscle 71. do.
  • step S35 the control unit 31 uses the fast muscle. It is determined whether or not the dominant muscle 71 is fatigued. An example of a method for determining whether or not muscle fatigue has occurred is as described above with respect to FIGS. 6 to 9.
  • the operations of steps S31 to S35 are the same as the operations of steps S1 to S5 described above with respect to FIG. 7.
  • step S35 NO
  • the muscle fatigue detection device 5 performs the above-mentioned measurement with respect to step S33.
  • the control unit 31 determines that the fast muscle dominant muscle 71 is fatigued (step S35: YES)
  • step S36 the control unit 31 increases the output current amount of the electrical stimulation. This is performed to improve the contractile force of the fast muscles among the muscles 71 in which the fast muscles are dominant.
  • the control unit 31 may change the frequency of the electrical stimulation in order to improve the contractile force of the slow muscle among the fast muscle dominant muscle 71, if necessary.
  • step S37 the control unit 31 determines whether or not the contractile force of the fast muscle dominant muscle 71 is improved. That is, in step S37, as described above with respect to step S35, the control unit 31 determines whether or not the fatigue of the fast muscle dominant muscle 71 has occurred, that is, whether or not the fatigue of the fast muscle dominant muscle 71 has recovered. to decide.
  • An example of a method for determining whether or not muscle fatigue has occurred is as described above.
  • step S39 the muscle fatigue detection device 5 is fast muscle dominant due to the myoelectric detection electrode 51.
  • the muscle action potential of the muscle 71 is detected, and the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation is measured (time Tx).
  • step S37: NO the control unit 31 is in step S38.
  • step S38 the control unit 31 stops the electrical stimulation to the fast muscle dominant muscle 71 and the slow muscle dominant muscle 74 by changing at least one of the current and the frequency of the electrical stimulation. To start.
  • steps S39 and S40 are the same as the operations of steps S33 and S34.
  • the control unit 31 switches the electrical stimulation from the fast muscle dominant muscle 71 to the slow muscle dominant muscle 74. Therefore, after the fatigue of the fast muscle dominant muscle 71 occurs, the slow muscle dominant muscle 74 can continue contraction for a long time. As a result, the electrical stimulation system 2 according to the present embodiment can more reliably maintain the muscle contraction effect for a long period of time.
  • the gastrocnemius muscle was mentioned as an example of the muscle 71 in which the fast muscle was dominant, and the soleus muscle was mentioned as an example of the muscle 74 in which the slow muscle was dominant.
  • the examples of the fast muscle dominant muscle 71 and the slow muscle dominant muscle 74 are not limited to this.
  • other examples of the fast muscle dominant muscle 71 include the tibialis anterior muscle / extensor digitorum longus muscle / extensor hallucis longus muscle.
  • the posterior tibial muscle / flexor digitorum longus / flexor hallucis longus can be mentioned. Even in this case, the same effect as that of the above-described specific example can be obtained.
  • the electrical stimulation system according to the second embodiment of the present invention will be described. If the components of the electrical stimulation system 2B according to the second embodiment are the same as the components of the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3, the overlapping description will be described. It will be omitted as appropriate, and the differences will be mainly described below.
  • FIG. 15 is a block diagram showing a main configuration of an electrical stimulation system according to a second embodiment of the present invention.
  • the electrical stimulation system 2B according to the present embodiment includes a main body 3 (see FIG. 1), an electrical stimulation device 4, a muscle fatigue detection device 5, an electrode pad 6, and a flow meter 35.
  • the main body 3, the electrical stimulator 4, the muscle fatigue detection device 5, and the electrode pad 6 are as described above with respect to FIGS. 1 to 3. That is, the electrical stimulation system 2B according to the present embodiment further includes a flow meter 35 as compared with the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3.
  • the electrical stimulation system 2B according to the present embodiment is different from the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3.
  • the flow meter 35 detects the flow rate of blood flowing through the body by a non-invasive method.
  • the form of the flow meter 35 is not particularly limited, and is, for example, an ultrasonic flow meter.
  • the detection method of the flow meter 35 may be a Doppler type or a transit time type.
  • Examples of the flow meter 35 include a duplex ultrasonic blood flow meter, an ultrasonic color Doppler blood flow meter, and a laser blood flow meter.
  • a laser blood flow meter a laser light emitting / receiving element corresponding to the upstream side of the blood flow is provided, and a light receiving element corresponding to the downstream side of the blood flow is provided.
  • the inner diameter of the blood vessel is calculated based on the signal of the laser emitting / receiving element.
  • the blood flow rate is calculated by the intravascular cross-sectional area calculated based on the inner diameter of the blood vessel and the blood flow velocity calculated by utilizing the Doppler effect.
  • the blood flow velocity is calculated by the Doppler effect based on the light emission signal transmitted from the laser light emitting element corresponding to the upstream side of the blood flow and the received signal transmitted from the light receiving element corresponding to the downstream side of the blood flow.
  • FIG. 16 is a schematic diagram illustrating a specific example of the operation of the electrical stimulation system according to the present embodiment.
  • FIG. 17 is a flowchart illustrating a specific example of the operation of the electrical stimulation system according to the present embodiment.
  • the electrode pad 6 including the stimulation electrode 42 and the myoelectric detection electrode 51 is attached to the body surface in the vicinity of the gastrocnemius muscle.
  • the gastrocnemius muscle is the muscle 71 in which the fast muscle is dominant.
  • the flow meter 35 is an ultrasonic flow meter.
  • the ultrasonic transmitter / receiver 36 included in the flow meter 35 is attached to the body surface in the vicinity of the popliteal fossa (back of the knee).
  • an ultrasonic element provided on the upstream side of the blood flow is formed by a transmitting / receiving element, and an ultrasonic element provided on the downstream side of the blood flow is formed by a receiving element.
  • the inner diameter of the blood vessel is calculated based on the signal of the transmitting / receiving element of the ultrasonic element provided on the upstream side of the blood flow.
  • the cross-sectional area inside the blood vessel is calculated based on the inner diameter of the blood vessel.
  • step S41 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and the fast muscle dominant muscle 71 in the initial state.
  • the electromyogram is measured (time T0).
  • step S42 the electrical stimulator 4 generates an electrical signal for electrical stimulation by the electrical stimulation signal generation unit 41, and at least one of the fast muscle dominant muscle 71 and the motor nerve via the stimulation electrode 42. Electricity is supplied to the crab and the electrical stimulation of the muscle 71, which is dominant in the fast muscle, is started.
  • step S43 the muscle fatigue detection device 5 detects the muscle action potential of the fast muscle dominant muscle 71 by the myoelectric detection electrode 51, and measures the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation. (Time Tx).
  • step S43 the flow meter 35 is superposed by the Doppler effect based on the transmission signal transmitted from the transmission element on the upstream side of the blood flow and the reception signal transmitted from the reception element on the downstream side of the blood flow.
  • the flow velocity of blood flowing in the vicinity of the attachment point of the sound wave transmitter / receiver 36 is calculated.
  • the flow meter 35 detects the blood flow rate by the intravascular cross-sectional area calculated based on the inner diameter of the blood vessel and the blood flow rate calculated by using the Doppler effect, and the blood flow rate during electrical stimulation. (Time Tx).
  • body water, body fat, and the like may be measured as other parameters (time Tx).
  • step S44 the control unit 31 determines whether or not a predetermined time has elapsed since the electrical stimulator 4 started electrical stimulation of the fast muscle-dominant muscle 71 (step S42).
  • step S44: YES the control unit 31 ends the electrical stimulation of the fast muscle dominant muscle 71. do.
  • step S45 the control unit 31 uses the fast muscle.
  • control unit 31 may determine the degree of fluctuation of other parameters such as body water and body fat.
  • step S45: NO the muscle fatigue detection device 5 may be used. The measurement described above is performed with respect to step S43.
  • step S45: YES the control unit 31 is in step S46. Increases the output current amount of electrical stimulation to improve the contractile force of the fast muscle among the muscles 71 in which the fast muscle is dominant. Then, in step S47, the control unit 31 determines whether or not the contractile force of the fast muscle among the fast muscle dominant muscle 71 is improved.
  • step S47 the control unit 31 determines whether or not the fatigue of the fast muscle dominant muscle 71 has occurred, that is, whether or not the fatigue of the fast muscle dominant muscle 71 has recovered, as described above with respect to step S45. to decide.
  • An example of a method for determining whether or not muscle fatigue has occurred is as described above.
  • step S49 the muscle fatigue detection device 5 uses the myoelectric detection electrode 51.
  • the action potential of the fast muscle dominant muscle 71 is detected, and the electromyogram of the fast muscle dominant muscle 71 during electrical stimulation is measured (time Tx).
  • step S47: NO the control unit 31 changes the frequency of the electrical stimulation and switches the superiority of contraction from the fast muscle to the slow muscle among the fast muscle dominant muscles 71.
  • step S46 the control unit 31 performs the electric stimulation current according to the degree of muscle fatigue detected by the muscle fatigue detection device 5 and the change in blood flow rate detected by the flow meter 35.
  • the control unit 31 switches the superiority of contraction from the fast muscle to the slow muscle among the fast muscle dominant muscles 71 by changing the frequency of the electrical stimulation.
  • steps S49 and S50 are the same as the operations of steps S9 and S10 described above with respect to FIG. 7.
  • control unit 31 can switch the muscles to be contracted by the electrical stimulator 4 based on not only the degree of muscle fatigue but also the change in blood flow rate.
  • the electrical stimulation system 2B according to the present embodiment can maintain the muscle contraction effect for a long period of time, further enhance the effect of increasing deep vein blood flow, prevent deep vein thrombosis, and prevent veins in the lower limbs. Further improvement effect of disease or arterial disease can be obtained.
  • the case where the electrical stimulation system 2B according to the present embodiment performs the operation of the first specific example described above with respect to FIGS. 6 to 9 is taken as an example.
  • the specific example of the operation of the electrical stimulation system 2B according to the present embodiment is not limited to this, and may be the second specific example described above with respect to FIGS. 10 to 12, and FIGS. 13 and 14 show.
  • the third specific example described above may be used. Also in this case, the same effects as those described above with respect to FIGS. 10 to 12 and the effects described above with respect to FIGS. 13 and 14 can be obtained.
  • the electrical stimulation system according to the third embodiment of the present invention will be described. If the components of the electrical stimulation system 2C according to the third embodiment are the same as the components of the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3, the overlapping description will be described. It will be omitted as appropriate, and the differences will be mainly described below.
  • FIG. 18 is a schematic view showing an electrical stimulation system according to a third embodiment of the present invention.
  • the electrical stimulation system 2C according to the present embodiment intermittently presses the main body 3 (see FIG. 1), the electrical stimulation device 4, the muscle fatigue detection device 5, the electrode pad 6, and the body such as the patient's lower limbs. It is provided with an intermittent air compression device (IPC) 9.
  • the main body 3, the electrical stimulator 4, the muscle fatigue detection device 5, and the electrode pad 6 are as described above with respect to FIGS. 1 to 3. That is, the electrical stimulation system 2C according to the present embodiment further includes an intermittent air compression device 9 as compared with the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3. In this respect, the electrical stimulation system 2C according to the present embodiment is different from the electrical stimulation system 2 according to the first embodiment described above with respect to FIGS. 1 to 3.
  • the muscle contraction effect can be maintained for a long period of time, the effect of increasing deep vein blood flow is further enhanced, the prevention of deep vein thrombosis and the venous disease of the lower limbs are further enhanced. Alternatively, a further improvement effect on arterial disease can be obtained.

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Abstract

Le problème décrit par la présente invention est de fournir un système d'électrostimulation maintenant un effet de contraction musculaire sur une longue période de temps. La solution selon l'invention porte sur un système d'électrostimulation (2) qui comprend : un dispositif d'électrostimulation (4) qui applique une électrostimulation à un muscle et/ou à un nerf moteur d'un corps et amène le muscle à se contracter ; un dispositif de détection de fatigue musculaire (5) qui détecte la fatigue du muscle amené à se contracter par le dispositif d'électrostimulation (4) ; et une unité de commande (31) qui exécute une commande pour modifier le courant électrique et/ou la fréquence de l'électrostimulation en fonction du niveau de fatigue du muscle détecté par le dispositif de détection de fatigue musculaire (5).
PCT/JP2021/009364 2020-03-27 2021-03-09 Système d'électrostimulation WO2021193035A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11253560A (ja) * 1998-03-10 1999-09-21 Sanyo Electric Co Ltd 低周波治療器
US20050283205A1 (en) * 2004-06-10 2005-12-22 Samsung Electronics Co., Ltd. Apparatus, method, and medium controlling electrical stimulation and/or health training/monitoring
WO2015099090A1 (fr) * 2013-12-26 2015-07-02 国立大学法人名古屋大学 Dispositif d'amélioration de fonctions endothéliales vasculaires
JP2017502752A (ja) * 2014-01-03 2017-01-26 エムシー１０ インコーポレイテッドＭｃ１０，Ｉｎｃ． 流量センシングを含むカテーテルまたはガイドワイヤデバイスおよびその使用
JP2019054966A (ja) * 2017-09-20 2019-04-11 エレコム株式会社 Ｅｍｓ装置
JP2019512333A (ja) * 2016-03-22 2019-05-16 パワードット，インコーポレイテッド コンパクト型筋肉刺激装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11253560A (ja) * 1998-03-10 1999-09-21 Sanyo Electric Co Ltd 低周波治療器
US20050283205A1 (en) * 2004-06-10 2005-12-22 Samsung Electronics Co., Ltd. Apparatus, method, and medium controlling electrical stimulation and/or health training/monitoring
WO2015099090A1 (fr) * 2013-12-26 2015-07-02 国立大学法人名古屋大学 Dispositif d'amélioration de fonctions endothéliales vasculaires
JP2017502752A (ja) * 2014-01-03 2017-01-26 エムシー１０ インコーポレイテッドＭｃ１０，Ｉｎｃ． 流量センシングを含むカテーテルまたはガイドワイヤデバイスおよびその使用
JP2019512333A (ja) * 2016-03-22 2019-05-16 パワードット，インコーポレイテッド コンパクト型筋肉刺激装置
JP2019054966A (ja) * 2017-09-20 2019-04-11 エレコム株式会社 Ｅｍｓ装置

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