RU124574U1 - DEVICE FOR ELECTROMOSTIMULATION OF AN IMMOBILIZED EXTREMITY - Google Patents

Abstract

A device for electromyostimulation of an immobilized limb, consisting of three interconnected blocks: a motion registration block, a stimulating pulse block and a device control block; wherein the motion recording unit includes an accelerometer and a vibration sensor located in the housing with dimensions of 30 × 30 × 20 mm; a device control unit including a settings panel containing an electrical stimulation mode key, a motion sensor sensitivity relay, an audio frequency generator, an LED indicator, a delay timer; a block of stimulating pulses containing a generator of the fundamental frequency and a modulating frequency generator that feed pulses to the inputs of the shaper of stimulating pulse packets, the outputs of which are electrodes placed on the body.

Description

The utility model relates to medical equipment and can be used in devices for the rehabilitation of the musculoskeletal system in the treatment of injuries, fractures of the lower extremities by electrical stimulation.

A device is known for correcting human movements when walking (Patent No. 2034578), adopted as a prototype containing a block of stimulating pulses, synchronization sensors, a shaper of control pulses of training, several stimulation channels, each of which has an adjustable delay block, a shaper of a packet of stimulating pulses and an output cascade with two electrodes. Each synchronization sensor of the prototype contains an angle sensor, in which an infrared LED and an infrared photodiode are used to more accurately determine the start time of the limb flexion phase, the distance between which changes as the limb flexion angle increases.

The disadvantages of the prototype device include the impossibility of using this device in the rehabilitation of patients with an immobilized limb, because the proposed angular sensor cannot sufficiently assess micromotion in a joint free from immobilization. In addition, the installation of this angular sensor is not possible on joints with three degrees of freedom (shoulder, hip), because For the sensor to work correctly, the infrared LED and infrared photodiode must be in the same plane.

Technical result: improvement of the motion registration unit due to more sensitive sensors, as well as the possibility of placing and using the device on an immobilized limb.

The technical result is ensured by the fact that the proposed device contains three interconnected units: a motion registration unit, a stimulating pulse unit, and a device control unit. In this case, the motion registration unit includes an accelerometer and a vibration sensor, and the device control unit includes a settings panel containing a key for electrical stimulation modes, a motion sensor sensitivity relay, an audio frequency generator, an LED indicator and a delay timer. The block of stimulating pulses, in turn, contains a main frequency generator and a modulating frequency generator, which supply pulses to the inputs of the stimulator pulse shaper, the outputs of which are electrodes placed on the body. The device has its own power supply.

The utility model is illustrated by a figure, which shows a General view of the device (Figure 1).

The device consists of three interconnected blocks: a motion registration block (1), a stimulating pulse block (2) and a device control block (3). The motion recording unit includes an accelerometer (4) and a vibration sensor (5) placed in the housing (6) with dimensions of 30 × 30 × 20 mm. The control unit of the device (3) includes a settings panel (7) containing the key of the electrostimulation modes (8), a sensitivity switch for motion sensors (9), an audio frequency generator (10), an LED indicator (11), and a delay timer (12). The block of stimulating pulses (2) contains a main frequency generator (20-60 kHz) and a modulating frequency generator (30-100 Hz), which supply pulses to the input of a stimulator pulse shaper (13), the outputs of which are electrodes (14) placed on the body. The device has its own power supply (15).

The device operates as follows:

The motion registration unit (1) is fixed on the distal part of the immobilization dressing or limb with an adhesive plaster or bandage. Movements in the limbs are recorded using an accelerometer (4), and in the case of only micromotion, they are detected by a vibration sensor (5). The sensitivity of the sensors is set using the sensitivity switch of the motion sensors (9) by the doctor, as well as the time until the block of stimulating pulses is triggered if there are no signals from the sensors using the delay timer (12). The device control unit notifies the patient of the movement in the required volume using the sound frequency generator (10) and LED indicator (11). If, during the delay set by the timer (12), the signal from the motion registration unit (3) does not arrive, the stimulating pulse unit (2) performs myostimulation, the parameters of which are pre-selected by the doctor using the electrostimulation mode key (8), until the next sensors are activated in the registration unit movements (3). The sensitivity of the sensors in the motion registration unit (3) during rehabilitation is reduced by using the sensitivity sensor of the motion sensors (9), which necessitates the increase in the amplitude of movements in the limb by the patient.

Thus, the proposed device compares favorably with the prototype, its technical solution allows to achieve a technical result, design features of the invention, namely: a motion registration unit including a vibration sensor and an accelerometer, fixing not only macro- but also micro-mobility, which allows using the device in patients with immobilized limbs.

The effective operation of the device reduces the duration of the rehabilitation process. The possibility of forced stimulation at rest of the patient and the use of sound and light indicators inform the patient about the volume of movements and increases the efficiency of the doctor.

Using this device allows you to solve a number of problems:

1. Improve the rehabilitation process in patients with fractures of the limbs.

2. To reduce the duration of the rehabilitation process, with an increase in its quality.

Which, undoubtedly, will favorably affect the rehabilitation of patients with fractures of the extremities.

Claims (1)

A device for electromyostimulation of an immobilized limb, consisting of three interconnected blocks: a motion registration block, a stimulating pulse block and a device control block; at the same time, the motion registration unit includes an accelerometer and a vibration sensor located in a case with dimensions of 30 × 30 × 20 mm; a device control unit including a settings panel containing an electrical stimulation mode key, a motion sensor sensitivity relay, an audio frequency generator, an LED indicator, a delay timer; a block of stimulating pulses containing a generator of the fundamental frequency and a modulating frequency generator that feed pulses to the inputs of the shaper of stimulating pulse packets, the outputs of which are electrodes placed on the body.

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