Method and device for testing amplitude-and frequency characteristics of stabilometric platform

FIELD: medical engineering; medicine.

SUBSTANCE: device has triangular frame set on stabilometric platform for calibration time. Hinge and pendulum is attached to the frame and triangle vertex. The pendulum is composed of load movably mounted on bar. Angle meter is arranged between lateral sides adjacent to the vertexes. The angle meter and bar have scales. Method involves placing device onto platform producing loading possessing given parameters like generating oscillations of given frequency and amplitude in sagittal plane and then in frontal plane or at an angle of 45° to the planes. The stabilograms are recorded varying load position on the bar and pendulum deviation angle. The obtained parameter values are compared to reference ones and measurement error is estimated. Load position on the bar is measured under the same pendulum deviation angle. The pendulum deviation angle is varied under the same load position.

EFFECT: high accuracy and quality of examination.

4 cl, 1 dwg, 3 tbl

 

The invention relates to medicine, namely to functional diagnostics, can be used to calibrate a stabilometric platform.

Clinical movement analysis is a relatively young, actively evolving area of medicine. The important role it plays stabilometry - registration position and motion of the center of pressure when standing. Main areas of application: the study of patterns of maintaining a vertical posture in norm and pathology, functional diagnosis of musculoskeletal pathology and medical treatments based on the principles of biofeedback [Gurfinkel V.S., Ellner AM Part of the secondary motor areas of the frontal lobe of the brain in the organization of the postural components of voluntary movements in man // Neurophysiology, 1988. - T.20, No. 1, p.7-15].

To conduct stabilometric studies used the installation, including stabilometric platform connected to the device for recording and processing parameters stabilogram: magnitude, direction and amplitude-frequency characteristics of migration projection of the center of pressure on the supporting plane. Stabilometric platform consists of two rigid plates 60×40 cm, between which there is a pressure sensor. The calculation of each of the three components: vertical, frontal and sagittal and Rav is deystvuyushey attached to the platform forces are programmable based on the values of each sensor. Information from all sensors is cleared synchronously with the frequency of 100 Hz [Skvortsov A.I Clinical movement analysis - new opportunities. Medical information systems. Interagency thematic research collection. Taganrog: TGRT, 1995, p.129-132].

Stabilometric platform, like any measurement system that requires periodic accuracy test.

The known method and device for calibration diamagnetically platform, which consists in the fact that the platform load weight to a certain weight. Calibration of the horizontal components is carried out by means of spring dynamometers [Roshchin GI Method and device for determining the force action of the whole body and each limb support. - In the book. Third scientific session of SNIIP. M., 1953. - P.134-142]. In this case the device is the weight of a known weight and a spring dynamometer.

Stabilometric platform differs from the torque that registers not only the magnitude of the vector, the support reactions, but also coordinates the application of the vector. Calibration stabilometric platform conduct similar torque, but tazrout each of the four sensors at the corners of the platform, separately [Skvortsov A.I Clinical movement analysis. Stabilometry: - M: JSC "Antidoron" 2000. - 192 c.]. This device and method is most similar to is implemented.

The disadvantage of these devices and method is that they do not allow to measure the amplitude-frequency characteristic of the device, which is important for assessing the accuracy of the measurements.

The objective of the invention is a device and method of calibration of the amplitude-frequency characteristics of stabilometric platform to improve the accuracy and quality of research.

The device consists of a triangular frame, mounted on a stabilometric platform at the time of calibration. To the frame at the apex of the triangle attached to the hinge and attached to the pendulum, consisting of cargo, secured to the rod can move. Between lateral sides adjacent to the top, there is a protractor. Goniometer and a rod provided with a scale.

The method of calibration of the amplitude-frequency characteristics of stabilographic platform includes the location on the platform of the device generating the load with known settings: create oscillations at a given frequency and amplitude in the sagittal plane, then in the frontal plane or at an angle of 45° to these planes. Changing the location of the load on the rod and the deflection angle of the pendulum, register stabilogram, compare the settings with the set and estimate the measurement error. Positioning of the load on the rod change at the same angle of deviation Mat the ka. Change the deflection angle of the pendulum at the same position of the cargo.

The device illustrated in the drawing. The device consists of a triangular frame 1, mounted on a stabilometric platform 2 at the time of calibration. To the frame at the apex of the triangle attached to the hinge 3 and the attached pendulum, consisting of a cargo 4, mounted on the rod 5 can be moved. Between lateral sides adjacent to the top, is the protractor 6. Goniometer and a rod provided with a scale.

The novelty of the device:

triangular frame is installed on a stabilometric platform;

- to the frame at the apex of the triangle attached to the hinge and attached to the pendulum, consisting of cargo, secured to the rod to move;

- between lateral sides adjacent to the vertex is goniometer;

- goniometer and a rod provided with a scale.

The device operates as follows.

Calibration device mounted on stabilometric platform 2 in the center so that the oscillation of the pendulum was strictly in the front, then in the sagittal plane. The load 4 is installed on the rod 5 at a certain distance from the center of rotation of the hinge 3. The rod 5 has holes along the entire length. The load 4 has a shank threaded at one end, which is inserted into the hole on the rod end threaded recrucified the nut. This specifies the frequency of oscillation of the pendulum is determined by the formula:

where: L is the distance from the rotation axis to the center of mass of the cargo, m;

g - free fall acceleration, m/s2;

f is the frequency of oscillation of the pendulum, Hz.

The oscillation amplitude is determined by the formula:

A=L×sinα,

where: α - the angle of deviation of the weight of the pendulum, measured on the scale of the protractor;

L is the distance from the rotation axis to the center of mass of the cargo, m;

A - amplitude, m

The pendulum is rejected at a given angle defined by the stopper 6 and let go, start the registration stabilogram. The pendulum does slowly damped free oscillations with frequency f and amplitude A. Match the specified frequency and amplitude obtained in the calculations, with registered stabilometric platform when the oscillations of the pendulum in the sagittal and frontal planes. Comparing asked and obtained characteristics that make the conclusion about measurement errors and the need to set up the platform.

To determine the linearity characteristics of the stabilometric platform 2 the measurements are repeated by changing the position of the cargo 4 on the rod 5 of the pendulum at a constant angle of departure, at the same position of the cargo 4 change the deflection angle of the pendulum.

When a match is defined and registered data is remaining to carry out the calibration platform every morning before beginning research. When the divergence of the data by more than 5% will need to configure the sensors stabilometric platform.

The proposed method is as follows. Calibration device mounted on stabilometric platform 2 in the middle so that the oscillation of the pendulum was strictly in the frontal or sagittal plane. Cargo mounted on the rod at a certain distance L from the center of rotation. Calculate the indicators of frequency f and amplitude a at a given angle of deflection of the pendulum α. The pendulum is rejected at a given angle and let go, start the registration stabilogram. The measurements are repeated several times, changing the position of the cargo on the rod of the pendulum and leaving a constant angle or changing the deflection angle of the pendulum, without changing the position of the cargo. Calculate the frequency and amplitude of oscillation of the pendulum for all investigated values of the deflection angle and distance from the center of rotation by the formulas:

where: L is the distance from the rotation axis to the center of mass of the cargo, m;

g - free fall acceleration, m/s2;

f is the frequency of oscillation of the pendulum, Hz.

The oscillation amplitude is determined by the formula:

A=L×sinα,

where α - the angle of deviation of the weight of the pendulum, measured on the scale of the protractor;

L is the distance from the rotation axis to the center of mass of the cargo, m;

A - amplitude, m

Match the frequency and amplitude obtained in the calculations and set the device to test, with the registered apparatus when the oscillations of the pendulum in the sagittal and frontal planes.

Repeat the study, selecting the calibration device on the platform so that the oscillation of the pendulum was strictly in the sagittal plane.

You can implement the method as follows. The calibration device is fixed on a stabilometric platform at an angle of 45° to the sagittal and frontal axes of the platform. Cargo mounted on the rod at a certain distance from the center of rotation. The pendulum is rejected at a given angle and let go, start the registration stabilogram. The measurements are repeated several times, changing the position of the cargo on the rod of the pendulum and the angle of deviation. Calculate the amplitude of oscillation of the pendulum for all investigated values of the deflection angle and distance from the center of rotation by the formula:

where: α - the angle of deviation of the weight of the pendulum, measured on the scale of the protractor;

L is the distance from the rotation axis to the center of mass of the cargo, m;

A - amplitude, m

Match the frequency and amplitude obtained in the calculations and the specified device with the registered apparatus when the oscillations of the pendulum in sagittale and frontal planes.

Example 1. Verification stabilometric platform in the frontal plane. Set calibration device on a stabilometric platform strictly in the frontal plane through the center of the platform. The load installed on the rod at a distance of 0.25 m from the center of rotation. The pendulum has rejected angle of 5° and released, launched the registration stabilogram. The frequency f and amplitude As calculated by the formulas:

A=L×sinα=0.25 m×sin5°=0,00218 m

The measurement was repeated, tilting the pendulum 10°. The amplitude And calculated by the formula:

A=L×sinα=0.25 m×sin10°=0,00434 m

The load was set at a distance of 0.3 m from the center of rotation and repeated measurement:

A=L×sinα=0.3 m×sin5°=0,00261 m

A=L×sinα=0.3 m×sin10°=0,00521 m

The load was set at a distance of 0.35 m from the center of rotation and repeated measurements.

A=L×sinα=0.35 m×sin5°=0,00305 m

A=L×sinα=0.35 m×sin10°=0,00608 m

The calculated frequency and amplitude of oscillation of the pendulum for all investigated values of the deflection angle and distance from the center of rotation compared with the amplitude and frequency of actually showing stabilometric platform. The results of calculations and measurements is presented in table 1.

Table 1

The results of the calibration stabilometric platform in the frontal plane
The length of the pendulum, mThe calculated valuesThe actual value
Frequency, HzThe amplitude m for the deviation of the pendulum angleFrequency, HzThe amplitude m for the deviation of the pendulum angle
10°10°
0,251,000,002180,004341,000,002160,00435
0,300,910,002610,005210,910,002590,00512
0,350,840,003050,006080,840,003020,00614

The difference between the calculated and actual data does not exceed 5%, therefore, the accuracy of the stabilometric measurements is satisfactory. If the difference between the calculated and actual values would be 5% or more, ought to carry out the adjustment of the sensor platform.

Example 2. Calibration stabilometric platform in both planes. Install and calibration device on a stabilometric platform at an angle of 45° to the sagittal and frontal axes of the platform. The load installed on the rod at a distance of 0.25 m from the center of rotation. The pendulum has rejected angle of 5° and released, launched the registration stabilogram. The frequency f and amplitude As calculated by the formulas:

The measurement was repeated, tilting the pendulum 10°. The amplitude And calculated by the formula:

The load was set at a distance of 0.3 m from the center of rotation and repeated both dimensions. The frequency f and amplitude As calculated by the formulas:

The measurement was repeated, tilting the pendulum 10°. The amplitude And calculated by the formula:

The load was set at a distance of 0.35 m from the center of rotation and repeated measurements. The frequency f and amplitude As calculated by the formulas:

The measurement was repeated, tilting the pendulum 10°. The amplitude And calculated by the formula:

Compare the calculated amplitude and frequency with actually shown stabilometric platform. The results of calculations and measurements are given in table 2 and 3.

Table 2

The results of the calibration stabilometric platform in the frontal plane
The length of the pendulum, mThe calculated valuesThe actual value
Frequency, HzThe amplitude m for the deviation of the pendulum angleFrequency, HzThe amplitude m for the deviation of the pendulum angle
10°10°
0,251,000,001540,003071,000,001580,00315
0,300,910,001850,003680,910,001820,00364
0,350,840,002160,00430,840,002140,00422

Table 3

The results of the calibration stabilometric platform

in the sagittal plane
The length of the pendulum, mThe calculated valuesThe actual value
Frequency, HzAmplitude, m p and the deviation of the pendulum angle Frequency, HzThe amplitude m for the deviation of the pendulum angle
10°10°
0,251,000,001540,003071,000,001490,00301
0,300,910,001850,003680,910,001730,00354
0,350,840,002160,00430,840,002140,00427

The difference between estimated and actual values is less than 5%, therefore, the accuracy of the stabilometric measurements is satisfactory.

The proposed method is effective for calibration stabilometric platform. Its use contributes to the quality of research due to their best metrological support.

The proposed method is used on the basis of the Federal state institution of Novokuznetsk scientific-production center of medical-social expertise and rehabilitation of disabled persons. In this way within six months is the calibration of the amplitude-frequency characteristics of stabilometric platform, part of the hardware-software complex clinical analysis of DWI the response "BIOMECHANICS", manufactured by the scientific and medical firm NMG.

1. Device for testing the characteristics of stabilometric platform containing the load placed on the platform of stabilography, characterized in that it is provided with a triangular frame that is installed in the middle of the platform stabilography, on top of which is fixed to the hinge, and the load placed on the rod with the possibility of moving and fixing holes of the rod, a rod with a load attached to the hinge with the possibility to perform in the form of pendulum oscillations in the sagittal and frontal planes, between the sides of the triangular frame is goniometer with the scale of the task of the angles of deflection of the pendulum, and the rod is provided with a distance scale from the rotation center of the hinge.

2. Method of verification characteristics of the stabilometric platform, which includes the calibration of the platform with the load, wherein the load on the rod in the form of a pendulum set in the device, placed on the platform, create oscillations of a pendulum with a given frequency and amplitude in the sagittal, then in the frontal plane or at an angle of 45° these planes, register stabilogram by changing the position of the load on the rod and the deflection angle of the pendulum, compare the amplitude-frequency characteristics with design and estimate the measurement error considered is the error, not exceeding 5%, satisfactory for carrying out stabilometric measurements.

3. The method according to claim 2, wherein changing the position of the cargo on the rod at the same angle of deflection of a pendulum.

4. The method according to claim 2, characterized in that changing the deflection angle of the pendulum at the same position of the cargo.



 

Same patents:

FIELD: medicine.

SUBSTANCE: method involves studying reflex phenomena when acting with irritating factors being candidate allergens. A reflex with normal response is selected in advance. The organism contact response to particular allergen being weakened, allergic reaction to this allergen is determined.

EFFECT: wide range of diagnosis means for detecting allergy.

FIELD: sports, in particular, methods for working out of specific motive qualities of sportsmen in box and fist-fighting single combat events of sports.

SUBSTANCE: method involves providing exercising activities including repeated locomotion cycles combined with overcoming resistance of antagonistic muscles for working out of space and time organizing of muscular activities; fixing muscle phase electrical activities sensors on sportsman's local muscles, said sensors being adapted for transmitting information to computer; fixing electronic devices on muscles antagonistic with regard to local muscles and on posture muscles for electric activation of muscles in response to signals generated by computer receiving information from sensors; performing exercising motive actions for overcoming resistance of antagonistic muscles and for controlling of protective postures remotely activated by computer in accordance with program or coacher's commands.

EFFECT: increased efficiency in working out and fixing of specific motive qualities of sportsmen in box and fist-fighting single-combat events of sports.

FIELD: medicine.

SUBSTANCE: method involves taking photo of patient bearing. Points are marked with bone reference taken into consideration like spinal process apices C7 and D12, supero- and inferomedial scapula angles, acromion, iliac crest at the place it is intersected with posterior axillary line, middle point of subgluteal folds, coronoid process of ulna and middle point of heel bones. Then, patient bearing photo is taken. The first topogram image is saved in database and the second photography is carried out 30 s later after having applied static load to dorsal muscles and muscles of upper and lower extremities. The result is saved in database. The images are processed by tracing lines and calculating ratios of distances between reference points. Functional state of locomotor apparatus is evaluated by comparing the primary and secondary results. When holding trunk straight longer than 30 s and having in view the first topogram, functional state of locomotor system is evaluated as compensation state. When holding trunk straight less than 30 s, functional state is evaluated as subcompensation state. Holding the trunk straight being impossible, decompensation state is considered to be the case.

EFFECT: high accuracy of diagnosis; enhanced effectiveness in selecting appropriate disorder correction method.

1 dwg

FIELD: physical culture and sports equipment.

SUBSTANCE: apparatus has working platform consisting of two surfaces movably connected with one another, and is further equipped with two vertical columns, each of said columns having at one side centimeter markings and at other side angular markings. Two clips are provided on each vertical column for fixing said surfaces of working platform. Apparatus for measuring angle of spreading of legs is formed as protractor rigidly attached by means of pressing screw to junction site of said surfaces. Leg retaining device is made in the form of belts fixed on surfaces of said working platform. Apparatus may be further equipped with central column positioned so that its height may be adjusted. Said column is disposed under working platform at the site of junction of its surfaces.

EFFECT: increased precision in evaluating mobility of lower limb joints.

2 cl, 3 dwg

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of mitral (P1) and aortic (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 2.2-4.2 interval it is possible to conclude upon pathology in development of aortic and mitral cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of tricuspid (P1) and aortic (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 2.65-4.90 interval it is possible to conclude upon pathology in development of aortic and tricuspid cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of tricuspid (P1) and pulmonary (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 1.9-4.0 interval it is possible to conclude upon pathology in development of tricuspid and pulmonary cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of mitral (P1) and tricuspid (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 2.65-4.90 interval it is possible to conclude upon pathology in development of mitral and tricuspid cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of mitral (P1) and pulmonary (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 1.9-4.0 interval it is possible to conclude upon pathology in development of mitral and pulmonary cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine, cardiology.

SUBSTANCE: in male neonatals one should measure intra-operational values for the parameters of pulmonary (P1) and aortic (P2) cardiac valves and calculate C coefficient according to empirical formula: C = ψP1/P2, where C - empirical coefficient being equal to 1.95, and if C values are beyond 1.36-3.12 interval it is possible to conclude upon pathology in development of aortic and pulmonary cardiac valves. The innovation suggested enables to perform quick-test diagnostics of valvular pathology in neonatals.

EFFECT: higher accuracy and efficiency of diagnostics.

5 ex

FIELD: medicine.

SUBSTANCE: method involves selecting a set of points describing vertebral column arch form, estimating central angle value, chord inclination, arch radius and chord length in each vertebral column segment. Vertebral column function is evaluated on the basis of central angle value and arch radius in standard positions. Angular and linear parameters describing vertebral column form and spatial orientation in three planes are calculated and compared to parameter values characterizing normal state.

EFFECT: high accuracy of quantitative parameters estimations.

1 tbl

FIELD: medical engineering.

SUBSTANCE: device is manufactured from transparent polymethyl methacrylate of 1 cm in thickness. The device has base, fastening belts and opening. The base is rectangular and has width of 40 cm and length of 60 cm. Rulers of different direction are available on upper base surface edges scaled from 56,0 to 0,0 cm and having tick value of 0.1 cm. Three angular scales are available as 90є-0є-90є protractors having their centers arranged in the middle of base width near the supporting platform of radii 20,0; 30,0 and 40,0 cm. Protractor scale tick value is equal to 1 grade. Five through holes are available on each side some distance far from lateral surfaces of the base. The holes are arranged at the level of 10, 19, 28, 37 and 46 cm and are used for attaching the fastening belts and fixing the device in folded state. Four holes of diameters 0,5 and 0,3 cm are available on each side some distance far from the frontal and back base edge for fixing walls. Flexible thread is available on the lower base surface. The thread is tightly attached to the rest side center and is easily movable on the opposite side. The thread is used for drawing longitudinal bone axis. Flexible thread is attached to lateral surfaces by means of sliding clamps for drawing additional bone axes. Device for measuring angles (protractor of radius 20 cm) is attached to the measuring side by means of fastening stainless steel members at an angle of 90є. Two holes united with base holes of diameter 0,3 cm are available on the lower wall surface for making fixation by means of screws, two built-in rods of diameter 0,3 cm enable one to rigidly attach the wall to the base. Easily movable arrow-ruler having tick value equal to 0.1cm and reading origin at the upper plane of device base, is mounted on below the frontal surface of the protractor by means of fastening member. 0є-90є-0є scale of tick value equal to 1 grade is available at the top on the frontal protractor surface with reading origin set on upper base surface. One hole on each side is available some distance far from lateral surfaces for folding the device by making protractor wall close to the upper base surface. Supporting wall of 8,0 cm in height and width equal to base width is attached at an angle of 90є to base supporting wall by means of screws and stainless steel rods built-in into the supporting wall. The wall is 1,0 cm thick. Two holes united with base holes of diameter 0,3 cm are available on the lower supporting wall surface for making fixation by means of supporting screws. Two built-in rods of diameter 0,3 cm enable one to rigidly attach the wall to the base. One hole on each side is available some distance far from lateral surfaces for folding the device by making the supporting wall close to the upper base surface, when transporting the device.

EFFECT: high accuracy of measurements.

13 cl

FIELD: medicine, surgical gastroenterology.

SUBSTANCE: as functional parameters one should detect the amplitude for pulse oscillations, the period of motor wave and the value for tissue oxygenation. Moreover, one should measure the amplitude of pulse oscillations and the value of tissue oxygenation in tested section during the period of 1 motor wave, not less. At values of one and more amplitudes of pulse oscillations being below 2 mm and the value for tissue oxygenation being below 80% on should conclude upon disorders in viability of the section under testing. In case of no motor system in tested section one should simultaneously detect the period of motor wave in adjacent intact section. At values of one and more amplitudes of pulse oscillations being below 2 mm and the value of tissue oxygenation being below 80% in tested section during the period of one motor wave in adjacent intact section it is possible to conclude upon affected viability in tested section. The method enables to increase accuracy and information value in detecting affected viability of gastrointestinal organs and tissues.

EFFECT: decreased traumaticity level.

3 ex

FIELD: medicine.

SUBSTANCE: method involves taking imprints from upper and lower jaw for manufacturing plaster jaw models. The lower jaw plaster model is used for measuring mesiodistal dimensions of twelve teeth: 46-41 and 31-36. Particular tooth lacking, its dimensions are calculated using percent proportions from mean dental parameter values table. Individual general projection length norm is calculated for upper and lower jaw using formulas; Lpo=0.39*Σ12 and Lpu=0.35*Σ12, where Lpo and Lpu are the individual general projection length norms of lower and upper jaw, respectively; 0,39 and 0,35 are indices describing relationship binding mean general projection length of lower and upper jaw to mean sum of mesiodistal dimensions of twelve teeth(46-41 and 31-36) of lower dental row in persons having physiological occlusion and permanent teeth dimensions within the limits of mean values, respectively; Σ12 is the sum of mesiodistal dimensions of twelve teeth(46-41 and 31-36) measured on plaster model. Individual norm values of general upper and lower jaw projection length are compared to corresponding actual values measured on models. The values coinciding, conclusion is drawn concerning normal sagittal dimensions of denture. Difference being positive, increase in sagittal denture dimensions is considered to be the case. The difference being negative, reduction of sagittal denture dimensions is considered to be the case. Actual projection length values of the anterior segment are additionally determined by taking measurements from upper and lower jaw models, with distance between mesial point on labial approximal surface of incisor in vestibular position and point of intersection of line joining contact points of canine tooth and the first molar on the left and right side to median line of the upper jaw. Distance between contact point of lower central incisors cutting surfaces and point of intersection of line joining contact points of the first and the second premolars on the left and right side to median line of the lower jaw. Individual general projection length norms are calculated for upper and lower jaw anterior segment using formulas: lpo=0.16*Σ12 and lpu=0.17*Σ12, where lpo and lpu are the individual general projection length norms of lower and upper jaw anterior segment, respectively; 0,16 and 0,17 are indices describing relationship binding mean general projection length of lower and upper jaw anterior segment to mean sum of mesiodistal dimensions of twelve teeth(46-41 and 31-36) of lower dental row in persons having physiological occlusion and permanent teeth dimensions within the limits of mean values, respectively; Σ12 is the sum of mesiodistal dimensions of twelve teeth(46-41 and 31-36) measured on plaster model. Individual norm values of general upper and lower jaw anterior segment projection length are compared to corresponding actual values measured on models. The values coinciding, conclusion is drawn concerning normal sagittal dimensions of denture. Difference being positive, increase in sagittal dimensions of anterior denture segment is considered to be the case. The difference being negative, reduction of dimensions of anterior denture segment is considered to be the case.

EFFECT: enhanced effectiveness in detecting denture anomalies in sagittal direction.

2 cl, 4 tbl

FIELD: medicine.

SUBSTANCE: the present innovation deals with detecting the shift of patient's body in horizontal plane. Patient should be suggested to take standing position out of sitting position to obtain prints of feet. In case of feet asymmetry upon a plantogram, and/or deviation against anatomical configuration standard of feet prints one should detect the presence of body shift against central vertical axis. The method suggested enables to detect static disorders.

EFFECT: higher accuracy of detection.

9 dwg, 9 ex

FIELD: medicine.

SUBSTANCE: device has supporting upright having supporting member bearing a member for fixing ear. The supporting member has T-shaped upper and lower parts arranged in parallel to each other and allowing rotation by 90°. The members for fixing ear, the members for fixing nose and occiput are mounted on the lower supporting member part movable up and down and back and forth. Millimetric rulers arranged as letter U are mounted on the upper supporting member part.

EFFECT: high fixation reliability.

2 dwg

FIELD: medical engineering.

SUBSTANCE: device has transparent base, luminous source arranged under the base, photosensitive material and flexible membrane arranged under the base. The lower membrane side is manufactured as sharp protrusions directed towards the base. The membrane is manufactured from light-permeable material. Light-impermeable liquid is positioned between the membrane and base. Light-sensitive material is distributed over the membrane. The protrusions are pyramid-shaped arranged as raster.

EFFECT: high recorded image sharpness.

2 cl, 1 dwg

FIELD: medicine.

SUBSTANCE: method involves producing foot imprints on specially fixed flat-bed scanner capable to withstand human body weight load. Foot imprint processing is carried out by means of software for automating examination process. Operator marks foot image according to a pattern. The operator selects 12 key points with mouse unit and draws straight lines from point to point and calculates positions of calculatable points on foot image. Diagnostic values are calculated after having marked up the foot separately for anterior, median and posterior portions of the foot.

EFFECT: high diagnostic accuracy and accelerated examination.

4 dwg

FIELD: medicine.

SUBSTANCE: method involves determining chemical elements content in hair of children proved to belong to the first health rating group. The results are treated with regional age-specific reference values in percentile scales. One or several chemical element concentration being found equal to 25-75 percentile value, the case is considered to be normal and the child is referred as one belonging to the first health rating group. The value being below 25-10 or higher than 75-90 percentile level, the case is considered to be low or high and the child is transferred to the second health rating group.

EFFECT: high accuracy in detecting health condition deviations at early stage.

12 tbl

FIELD: medicine; neurology.

SUBSTANCE: testing is conducted onto stable-graphic platform when patient does exercises to keep his/her vertical position. During doing any exercise, the trajectory of motion of center of body's pressure onto platform is measured and fixed. Statokinegram received then is subject to analysis by means of vector analysis and normalized area of statokinegram is measured as well as average radius of body's inclination, quality factor of equilibrium function in form of coefficient λ of exponential dependence f(n)=I-eλn, relative frequency of vertexes of vectors at concentric areas of statokinegram being equal to each other, increasing area of vector, factor of sharp change in vector of motion, average linear and angular speeds and accelerations and factors of asymmetry of angular speed and acceleration. Then the kind of ataxia is diagnosed by using statistic method of classification trees.

EFFECT: wider range of diagnostic aids for determining kind of ataxia.

8 tbl, 4 dwg, 2 ex

Up!