RU1773416C - Electric neurostimulator - Google Patents

Abstract

The invention relates to medical instrumentation and is intended for use in medical medical practice for stimulating nerves with electrical signals to relieve chronic pain. SUBSTANCE: electric neurostimulator containing a power source, controlled by the voltage of a 2 pulse generator, waiting for a multivibrator 3. output stage 4, a control pulse generator 5, a modulation signal generator 6, a toggle switch 7 and a resistor 9, is characterized in which contains a series-connected second standby multivibrator and a second output stage. The output of the second arm of the voltage controlled oscillator is connected to the input of the second standby multivibrator. 3 ill.

Description

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The invention relates to medical instrumentation and is intended for use in medical medical practice for stimulating nerves with electrical signals to relieve chronic pain.

An electrical neurostimulator is known, which contains a power source and a series connected clock generator, a waiting multivibrator and an output stage, and an emitter divider and a compensating two-terminal device consisting of a resistor and a zener diode, one pole of which is connected to a power source, are introduced into the waiting multivibrator. and the other with the midpoint of the emitter divider.

The disadvantages of such neurostimulators include the small possibility of their use due to stimulation of nerves with electrical signals of the same frequency, which, with prolonged stimulation, leads to a decrease in the effect of electrical stimulation due to adaptation of fixed frequencies to pulsed current during electrical stimulation sessions.

Known is an electric neurostimulator containing a power source, a voltage-controlled pulse generator, for example, a symmetric multivibrator, controlled by a bias voltage at the bases of transistors, a waiting multivibrator, an output stage, a control pulse generator, for example, a symmetric multivibrator, a signal conditioner module For example, an integrating circuit, or a ramp generator, or a ramp generator, or a pseudo-random signal generator, the toggle switch kind of work, and the potentiometer resistor.

The disadvantages of such mountain neurostimuli include the impossibility of simultaneous symmetric electrical stimulation of peripheral nerves or spinal nerve roots, or pain foci located on the lower and upper extremities.

The aim of the invention is to expand the capabilities of the device by creating symmetrical stimulation for the treatment of pain syndromes with extensive areas of their localization.

This goal is achieved by the fact that in a known neurostimulator containing a power source, a voltage-controlled pulse generator, a waiting multivibrator, an output stage, a control pulse generator, a shaper

modulation signal, work switch and resistor, a second standby multivibrator and a second output stage are introduced, the output of the second arm controlled

the voltage of the generator is connected to the input of the standby multivibrator, and its output is connected to the input of the second output stage.

Figure 1 shows an electrical

circuit of an electrical neurostimulator; Figures 2 and 3 are voltage plots illustrating its operation both at a single frequency and in a frequency range.

An electrical neurostimulator contains a power supply 1, a voltage-controlled pulse generator 2, for example, a symmetric multivibrator controlled by a bias voltage at the bases of transistors, first and second waiting multivibrators 3, first and second output stages 4, control pulse generator 5, for example, a symmetric multivibrator, a shaper of a modulation signal b, for example, an integrating

a circuit, or a sawtooth voltage generator, or a ramp generator, or a pseudo-random signal generator, a type of operation switch 17, a potentiometer 3 and

resistor 9. The second standby multivibrator and the second output stage are connected in series, while the output of the second arm of the voltage controlled oscillator is connected to the input of the second standby multivibrator.

An electrical neurostimulator works as follows,

1. In the continuous stimulation mode, only one contact of the toggle switch of the kind of work is closed 7. In this case, the pulse generator 2 is controlled by the voltage and generates at its outputs a sequence of pulses shifted relative to each other by half the time they follow

the frequency determined by the position of the movable contact of the potentiometer 8 in the range from 5 to 110 Hz (figure 2, plot a, a), each of which carries out the launch of the corresponding waiting multivibrators

3. Waiting multivibrators 3 generate voltage pulses, the duration of which is m, 72 is determined by the time parameters of the drive chains of the corresponding waiting multivibrators 3 (Fig. 2, diagram

B.b1).

From the outputs of the waiting multivibrators 3, voltage pulses are fed to the corresponding inputs of the output stages 4, which at their outputs form electrical signals of a special shape, the amplitude of which is proportional to the duration of the voltage pulses coming from the waiting multivibrators, which through the connecting wires and electrodes from the conductive rubber arrive per patient with a frequency determined by the position of the movable contact of the potentiometer.

2. In the periodic stimulation mode, other contacts of the toggle switch 7 of the kind of work switching are closed. At the same time, from the output of the control pulse generator 5, rectangular pulses with a frequency of, for example, 0.5-0.2 Hz (Fig. C, plot c) are received at the input of the modulator of the modulation signal b.

From the output of the modulator 6 of the modulation signal (Fig. 3, diagram d), the control signals are fed to the controlled input of the pulse generator 2, while the latter at its outputs generates sequences of pulses shifted relative to each other by half their repetition period with frequency determined by the shape of the control signals (Fig. 3, diagram a, a), which automatically changes from 5 to 110 Hz, each of which triggers the corresponding waiting multivibrators 3. Waiting multivibrators 3 generate voltage pulses, the duration of which 71, Ha is determined by the time parameters of the drive chains of the corresponding waiting multivibrators 3 (Fig. 3, diagram b, b).

From the outputs of the waiting multivibrators 3, voltage pulses are supplied to the corresponding inputs of the output stages 4,

and

which at their outputs generate electrical signals of a special shape, the amplitude of which is proportional to the duration of the voltage pulses coming from the waiting multivibrators, which through the connecting wires and electrodes from the conductive rubber, arrive at the patient with a varying frequency according to the law of the shape of the control signals 6.

Thus, the use of this electrical neurostimulator allows you to expand the capabilities of the device due to the simultaneous symmetric electrical stimulation of peripheral nerves, or spinal nerve roots, or pain foci located on the upper and lower extremities, which contributes to a better treatment of nerves with electrical signals for relieve chronic pain.

Claims (1)

SUMMARY OF THE INVENTION NJ 1651919, characterized in that, in order to expand the scope of the neurostimulator by performing symmetrical stimulation for the treatment of pain syndromes with extensive zones of their localization, it additionally contains a second multivibrator in series and a second output stage, the output of which is the second output of the neurostimulus torus, the second output of the voltage-controlled generator is connected to the input of the second standby multivibrator, B at at P l t jqu. g 1/4 g b and ft 5 1 fi l ..ЈC Tv Pancreas R Ј il and 1 .Ј Figz