RU2073489C1 - Device for estimation of functional condition of person's nervous-muscular apparatus - Google Patents

Abstract

FIELD: medical technology; estimation of person's functional state during physical exercises. SUBSTANCE: device has temperature sensor 1, amplifiers 2, 6 and 14, sensor of muscle electrobiological activity 3, amplitude detectors 4 and 15, integrator 12, biased multivibrator 13, frequency meter 16, sensing elements 19, timers 20 and 21. EFFECT: enlarged functional capabilities. 1 dwg

Description

 The invention relates to sports-medical measuring equipment, namely, devices for measuring the structure of power movements, and can be used to measure the parameters of the state of the neuromuscular system (NMA) of a person and for directed training of damaged muscles.

 The closest in technical essence is a device containing an amplifier, a sensor of electrical muscle activity, a switch, an analog-to-digital converter, a power supply, a voltage meter, a master oscillator, a multivibrator, sensors and an indicator, the output of the first amplifier being connected to the first input of an analog a digital converter, the output of which is connected to the indicator input, the output of the power supply is connected to the input of the voltage meter, the output of which is connected to the second input of the switch, and in the output of the master oscillator is connected to the input of the waiting multivibrator (SU, copyright certificate N 1473750, class A 61 V 5/22, 1989).

 The specified device is difficult to perform, has insufficient functionality and is inconvenient to use with outpatient treatment.

 The task at hand is to expand the functionality and improve ease of use during outpatient treatment.

 The drawing shows a diagram of the proposed device.

 The drawing shows: temperature sensor 1, first amplifier 2, sensor 3 of muscle electrical activity, first amplitude detector 4, integrator 5, second amplifier 6, first switch 7, first ADC 8, power supply 9, voltage meter 10, indicator (voltmeter) 11, a master oscillator 12, a waiting multivibrator 13, a third amplifier 14, a second amplitude detector 15, a frequency meter 16, a second switch 17, a second ADC 18, sensitive elements (electrode, sensor) 19, a first timer 20, a second timer 21. Sensor output 1 temperature connected to the input of amplifier 2, output One of which is connected to the first input of switch 7, a sensor 3 of electrical muscle activity, an amplitude detector 4, an integrator 5, an amplifier 6, a switch 7, an ADC 8, a voltmeter 11 are connected in series, a master oscillator 12, a standby multivibrator 13, an amplifier 14, a frequency meter 16, the switch 17, the ADC 18, and the timer 20 are connected in series, the output of the power unit 9 is connected to the input of the voltage meter 10, the output of which is connected to the second input of the switch 7, the first output of the amplifier 14 is connected to the input of the amplitude detector 16, the output of which is connected to the fourth input of the switch 7, the second output of the switch 17 is connected to the timer 21.

 The sensor 3 of the electrical activity of the muscle can be performed, for example, as a strain gauge or seismic sensor, the ADC 8 and the ADC 18 can be built, for example, on the basis of the BIS KR572PV2A.

 The device operates as follows.

 The electrodes 19 are fixed on the studied muscle or muscle group and the electrical activity of the muscle is determined by the readings of the voltmeter 11. The patient sets the maximum load for the muscle or muscle group and holds this load until it is impossible to perform the specified static work, and the timer 20 controls the duration of the muscle stress state.

 The device is turned on in two stages: the power source 9 is turned on by a toggle switch, which is indicated by the glow of a red LED (not shown in the drawing). By turning on the "ON" button, the device is brought into working condition, which is indicated by the glow of a green LED. Voltmeter 11 shows a supply voltage of 8.4 ± 0.2V.

Dynamometer mode
A cord with a sensor (electrode) is connected to the DYNAM connector. The electrode 19 is mounted on the muscle under study, a voltage value close to zero is set using a voltmeter 11, and the electrical activity of the muscle is measured, as described above. The duration of the stress state of the muscle is controlled by a timer 20.

 Stimulator mode.

 The adjustment knobs are set to the leftmost position. Without inserting the cord into the connectors, fix the electrodes 19 on a localized area of the skin. Insert the cord into the connector and turn on the stimulator by pressing the "ON" button. For analgesic electrical stimulation, the optimal frequency is in the range of 40-100 Hz. It is set with a frequency adjustment knob. The signal amplitude is selected separately in each case of stimulation. To do this, by turning on the device with the AMPLIT control knob, the signal amplitude is gradually increased until a clear sensation under the electrode 19 is obtained in the form of a light monotonous vibration. Then, the stimulation intensity can be increased to pain, and then, to reduce the signal amplitude to pre-pain intensity of stimulation. For the convenience of operation of the device, it is possible to control the amplitude of the voltage applied to the electrodes 19 and the stimulation time by first switching the “Timer” indicator from the frequency display mode to the “Timer” mode, by pressing the “SEC” button and starting the timer 21.

 Timer mode.

 The timer mode 20 is used to display the operating time of the dynamometer, stimulator, temperature meter and to measure time intervals. Timer 20 starts as follows. By pressing the "SEC" button, the indicator switches to the "TIMER" mode, if it was connected to the stimulator frequency measurement and the timer is started by the "START / STOP" button, when pressed again, the count is paused without resetting the value, to continue the count, the "START / STOP" button is pressed again. The RESET button resets the indicator value. When the indicator reaches 99 minutes 59 seconds. the indicator is reset and the count starts again.

 Temperature measurement mode.

 The cord with the temperature sensor is inserted into the connector labeled "TERM" and the "TEMPER" button is pressed. The probe probe is touching the object under investigation. Indicator 11 displays the current temperature value. The scheme works as follows. The signal from the sensor 3 of the electrical activity of the muscle, varying in amplitude, is fed to the amplitude detector 4 and then to the integrator 5. At the amplitude detector 4, the envelope of the input signal is extracted, and the time constant of the integrator 5 is selected so that, firstly, to filter out interference, secondly, the integrator 5 must be sensitive to smooth changes. This choice is due to the fact that the indicator readings (voltmeter 11) for the convenience of visual observation should change smoothly.

 The unipolar signal from the integrator 5 is amplified by an amplifier 6 and fed to the third input of the switch 7 and then to the input of the ADC 8, and from its output to the indicator 11. The switch 7 is controlled from the front panel. The second input of the switch 7 through the voltage meter 10 receives a signal from the power unit 9, which indicates the output voltage of the power source. The first input of the switch 7 through the amplifier 2 receives a signal from the temperature sensor 1. The fourth input of the switch 7 receives the voltage signal of the stimulator (performed on the master oscillator 11, the waiting multivibrator 13, the amplifier 14 and the amplitude detector 15). The ADC 8 converts a linear analog signal into a seven-segment digital code, which is reflected in indicator 11.

 The output voltage of the stimulator is adjusted from 0 to 120V, the frequency from 0 to 200 Hz. The voltage of the variable frequency from the master oscillator 12, through the standby multivibrator 13, amplifier 14, amplitude detector 15, the switch 7 is fed to the ADC 8 and then to the indicator 11. The same signal of the master oscillator 12 through the standby multivibrator 13, amplifier 14, the frequency meter 16 is fed to the input of the switch 17 and then to the ADC 18 and then to the timer 20. Thus, by adjusting the output voltage of the stimulator, it is possible to accurately measure and adjust the voltage and frequency according to the readings of the timer 20. The output of the stimulator through the connector is connected to the electric trodes 19.

 Thus, the proposed device is a versatile multifunctional device designed to assess the state of human intracranial arteries by measuring the electrical activity of muscle tissue and can be used when undergoing treatment in a hospital, on an outpatient basis, or at home to complete treatment and rehabilitation of muscle tissues damaged as a result of trauma or surgical intervention, as well as for the assessment of intramuscular athletes.

Claims (1)

 A device for determining the functional state of the neuromuscular apparatus of a person, comprising a first amplifier, a sensor of electrical muscle activity, a first switch, a first analog-to-digital converter, a power supply, a voltage meter, a master oscillator, a multivibrator waiting, sensitive elements and an indicator, the output of the first amplifier connected to the first input of the first analog-to-digital converter, the output of which is connected to the indicator input, the output of the power supply is connected to the input of the meter I, whose output is connected to the second input of the first switch, the output of the master oscillator is connected to the input of the standby multivibrator, characterized in that a temperature sensor is connected to it, connected to the first amplifier, the first amplitude detector, integrator, and the second amplifier are connected in series, as well as the second an amplitude detector connected to a third amplifier, a frequency meter connected in series, a second switch, a second analog-to-digital converter and a first timer, a second timer, the input being the amplitude detector is connected to the output of the muscle electrical activity sensor, the output of the second amplifier is connected to the third input of the first switch, the output of which is connected to the input of the third amplifier, the group of inputs of which is connected to the outputs of the sensitive elements, the first output of the third amplifier is connected to the input of the second amplitude detector, output which is connected to the fourth input of the first switch, the second output of the third amplifier is connected to the input of the frequency meter, the second output of the second switch is connected to the second m timer, the fifth input of the first switch, the second input of the second switch and the second input of the first timer are the control inputs of the device.