SU1175432A1 - Apparatus for diagnosis of the functional state of man's arm movement - Google Patents

Abstract

DEVICE FOR DIAGNOSIS OF FUNCTIONAL STATE of fingers HUMAN comprising a cylindrical body, characterized in that in order to reduce diagnosis time, it comprises annular resistors disposed on the body surface, springs conductive contact elements in the form of tongues, mounted in the housing, a guiding pin, installed perpendicular to the cylindrical surface of the housing, and a bridge registration scheme. (L ate ji 00 to

Description

The invention relates to medicine, occupational physiology and ergonomics and can be applied, in particular, in traumatology and orthopedics to assess the functionality of the fingers of a damaged hand, monitor the effectiveness of treatment and the degree of recovery of motor functions, and can also be used in neurology and prosthetics. The aim of the invention is to reduce the diagnostic time. FIG. 1 shows the device, a general view; in fig. 2 - electric circuit of the device; in fig. 3 - device in a rectangular projection, section A-A; in fig. 4 - complete electrical circuit of the device; in fig. 5 - contactograms of the fingers of a normal and damaged hand. A device for diagnosing the functional state of human fingers (Fig. 1) is a cylinder with a diameter of 30 mm (60 and 90 mm) and a length of 120 mm, made of a dielectric material. It consists of a cylindrical body 1 with ring wire resistors 2 strung on it, which are arranged respectively with the fingers of the hand. Between the ring resistors are ring gaskets 3. All resistors and gaskets on the rod are rigidly fixed (Fig. 3). Flat ring spring elements 4, made in the form of tongues made of steel or brass foil or phosphorous bronze with a thickness of not more than 0.1 mm, are fixed above the ring-shaped resistors (to improve the contact, they can be silver-plated). The size and location of the plates on the device must match the size and location of the fingers. The device is connected via a connector 5 to a bridge circuit of a recording device, in which quality the recorder H-338/6, K-121 oscilloscope, ELKAR-6 electrocardiograph, etc. can be used. The device has a guide pin 6, which ensures that contact plates 4. The device operates as follows. The test subject's hand is placed on the proposed device in such a way that guide pin 6 is located between III and IV fingers and rests against the interdigital fold. Then, the subject is given the task to make 5-6 flexion and extension movements with a full grip of the device at the maximum pace. During these movements, the recorder makes a graphic record of the sequence of contact of the palmar surface of the fingers with the device surface through the contact elements. In this way, contactograms of five fingers are obtained on the recording paper in the form of five curves — graphic images of the contact of the fingers with the surface of the device (Fig. 5). The described operation is performed both with a damaged brush and intact. Recording contactograms of an intact hand allows us to obtain a more accurate individual picture of the norm. The obtained contactograms of each finger of the damaged hand are compared with the contactgrams of the corresponding fingers of the intact brush, which are taken as the individual norm, i.e. more accurate for a given subject than the average statistical norm. In case of damage to the second hand, the average indicators of contactograms of people corresponding to the subject in height and age are taken as the norm. When comparing contactograms, the shape of the curves is analyzed, their amplitude is measured, the angle of inclination of the ascending and descending parts of the curves, the period of their oscillation, the frequency of the oscillations is calculated. Dividing the obtained indicators by the corresponding indicators of the norm and multiplying by 100%, determine the degree of dysfunction of each finger in percent. Thus, the degree of disturbance of the following functional parameters of the fingers is established: gripper volume - according to the ratio of the amplitudes of the curves; the rate of flexion and extension in terms of the angle of inclination of the ascending and descending parts of the curves; the duration of the gripper - by the duration of the oscillation period; gripping tempo - according to the frequency of oscillation of curves. The shape of the contactogram curves and the resulting digital indicators make it possible to quickly diagnose the nature of functional impairment and quantify the degree of their impairment.

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Claims (1)

DEVICE FOR DIAGNOSTIC OF FUNCTIONAL CONDITION OF FINGERS OF THE HUMAN BRUSH, containing a cylindrical body, characterized in that, in order to reduce the time of diagnosis, it contains ring resistors located on the surface of the body, spring contact elements in the form of tongues, fixed in the body, a guide pin, an installed perpendicular the cylindrical surface of the housing, and a bridge registration circuit. FIG. 1