RU2625294C1 - Device for correction of lower limbs motor activity in case of central hemiparesis - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: device for lower limbs motor activity correction in case of central hemiparesis contains a separate step web fixed to the steel support frame. The separate step web is fixed to the support frame by means of two front rotating and two rear free-rotating shafts and lies on two pairs of upper and lower support webs, between each pair of which four spring shock absorbers and four strain gauges are fixed, Hall sensors and electric braking system associated with the computer are located on the front rotating shafts axis.

EFFECT: increased effectiveness of the method for lower limbs motor activity correction in patients with paralysis by not only adapting, but also rehabilitating the central hemiparesis.

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Description

The invention relates to medicine, namely to restorative medicine and rehabilitation, and can be used in the rehabilitation of patients with central hemiparesis in the late recovery period of stroke, as well as with cerebral palsy of mild to moderate severity.

The closest in technical essence device for correcting locomotor dysfunctions of the lower extremities is known: the SPLIT-BELT medical treadmill (Woodway GmbH, Germany-USA, US patent US 8308618 dated 04/10/2009) with a lath split in the middle of the belt, providing speed control independently for each leg . The disadvantage of this device is its low efficiency due to the presence of an exclusively adaptation function aimed at adapting the patient to asymmetric walking conditions.

Technical result: increasing the efficiency of the method of correction of motor activity of the lower extremities in patients with paralysis through not only adaptation, but also rehabilitation of central hemiparesis.

The specified technical result is achieved using a device containing a separate step cloth fixed on a steel frame using front rotating and two rear free-rotating shafts, lying on two pairs of supporting webs, between which four spring shock absorbers and four strain gauge sensors are fixedly mounted, and containing Hall sensors and an electric brake system connected to a computer.

The invention is illustrated by drawings, where:

in FIG. 1 shows a General view of the device;

in FIG. 2 is a side view of the device.

The device consists of a steel frame (1), in which two front rotating shafts (2) are fixed, on the axis of which the electric brake system (3) and Hall sensors (4) are fixedly fixed, two rear freely rotating shafts (5), four solid-sheet supporting sheets (6) lying under a separate stepping canvas (7). Under each pair of steel one-piece supporting sheets (6) there are four spring shock absorbers (8) and four strain gauge sensors (9) (for example, console strain gauge sensors K-O-14A, PO Vetor-PM, Russia, Perm). A holding leash (for example, Vento “Profi waistband”, Vento group of companies, Russian Federation, Moscow) for fixing the patient during the session, carbines and accessories are fixed to the steel frame (1). Hall sensors (4), strain gauges (9) are adapted using proprietary software with a personal computer having a graphic output device mounted on the frame (1) using a latch (10). The device is made of steel, for example, medium alloyed chromium-nickel structural steel 38X2H5MA.

The device is used as follows. The patient's feet are placed on separate stepping webs (7), the right foot on the right fabric, the left foot on the left fabric, respectively, the patient's body is fixed with a retaining tie to the steel frame (1) on both sides.

At the first session, a diagnostic study is carried out: the patient is offered to perform walking walking at a pace convenient for him for 10 minutes. At the first and in all subsequent sessions, the patient is instructed to start walking from any leg as he wishes, warning about the end of the walk with the opposite leg and the need for minimal support of the body on the upper limbs.

The number of steps n taken for each leg (n _S and n _D ) is calculated, respectively, while n _S and n _D are equal to the number of simultaneous operation of the strain gauge sensors (9) under each side of the divided step web (7).

Calculate the asymmetry coefficient of the distance traveled (KA _S ), representing in the form of an ordinary fraction:

KA _S = S _S / S _D ,

where S _S is the distance traveled by the left foot (m), is fixed using the Hall sensor (4) of the left front shaft (2);

S _D - the distance traveled by the right foot (m) is fixed using the Hall sensor (4) of the right front shaft (2).

In the case of n _S > n _D , KA _{S is} corrected by the formula as

KA _S = KA _Scor = (S _S -m _S ) / S _D ,

where KA _Scor - adjusted KA _S ,

m _S - excess distance covered by the left foot (m), calculated by the formula

m _S = S _S / (n _S -n _D ) (m).

KA _{Scor are} calculated similarly _. for n _S <n _D :

KA _S = KA _Scor = S _S / (S _D -m _D ),

where KA _Scor - adjusted KA _S ,

m _D - excess distance covered by the right foot (m), calculated by the formula

m _D = S _D / (n _D -n _S ) (m).

For convenience, make the conversion

KA = KA _S * 100%,

where KA is the asymmetry coefficient (%).

Thus, with locomotor deficiency of the right lower limb, CA> 100%, with locomotor deficiency of the left lower limb, CA <100%.

To correct central hemiparesis in the late recovery period of a stroke, in case of cerebral palsy of mild to moderate severity, 10 or more sessions of 30 minutes are performed using the principle of biological feedback according to the following algorithm.

At the second and subsequent correction sessions, the patient is offered to walk in a convenient pace with dynamic visualization of the asymmetry of the distance traveled. At the same time, the patient is tasked with maintaining the same height of the columns of diagrams presented on the graphic output device of a personal computer and reflecting the asymmetry of the distance traveled.

The value of the rotation resistance of the front shafts (2) with the help of electric brake systems (3) at the first correction session is set based on the value of the asymmetry coefficient (KA) according to the formula

BC = KA-100 (%),

where BC is the resistance value of the electric brake system (3) of one of the front shafts (2), when BC> 0, the left front shaft, and when BC <0, the right front shaft. In this case, the resistance value of the front shafts (2) during their rotation without the resistance of the electric brake system (3) must be considered equal to 0%, the absolute stop of the rotation of the shafts using the electric brake system (3) must be considered equal to 100%.

Claims (1)

A device for correcting motor activity of the lower extremities with central hemiparesis, comprising a separate step cloth fixed to a steel support frame, characterized in that the separate step cloth is fixed to the support frame using two front rotating and two rear freely rotating shafts and lies on two pairs of upper and lower supporting webs, between each pair of which four spring shock absorbers and four strain gauge sensors are fixedly fixed, and on the axis of the front rotating shafts Hall sensors are arranged and an electric brake system associated with the computer.

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