RU18138U1 - AUTOMATED DEVICE FOR REGISTRATION, DISPLAY AND PROCESSING OF MEDICAL INFORMATION ABOUT THE STATUS OF A HUMAN OPERATOR UNDER CENTRIFUGAL ROTATION - Google Patents

Abstract

An automated device for recording, displaying and processing medical information about a person’s condition, characterized in that it is used under the influence of overloads in a centrifuge and includes sensors for recording three leads of an electrocardiogram, pneumogram, spirogram, blood pressure in the ear vessels, ear photopulse plethysmogram, foot dynamograms, pressure in the chambers of the control panel and in the mask space, overload values, marks of the operator; signaling devices of psychochronogram and clamping tangents; block amplifier-converting devices (BUPU); unit for remote control of operating modes of BUPU modules; two stabilized balanced power supply units BUPU (± 12v); PC data input device (16-channel multiplexer); personal computer type IBM RS / AT-486 or higher; specialized interface board in the PC system unit; alarm control unit; information display devices (SVGA type monitor, 8-12 channel recorder with matching device, laser printer); hazard signaling devices located on the panel of the experimenting physician (light and sound threshold indicators of the psychochronogram and tangent states); connecting cables; software and software providing registration, accumulation, display, printing, storage and posterior processing of medical information about the state of a human operator under conditions of rotation in a centrifuge.

Description

An automated device for recording, displaying and processing medical information about the state of a human operator in a centrifuge.

The invention relates to aviation, space and marine medicine, and in particular to automated methods for assessing a person’s condition in order to diagnose a test subject’s health and functional conditions under the influence of overloads of different directions during centrifuge rotation and can be used for printing recordings under various examination conditions clinical and occupational medicine.

There is an automated device for recording an electrocardiogram in 12 standard leads for the purpose of clinical diagnosis of the type Cardiosystem-4, developed by AO Meditek. Significant disadvantages of this device for the purpose of obtaining medical information about the state of a human operator under rotation in a centrifuge and other medical stands is the limitation of the number of recorded parameters, the impossibility of printing registration of a complex of biometric and technical indicators necessary for an operational assessment of the functional state of the human body, the impossibility of accumulating large information arrays and their posterior processing, as well as an insufficient level of interference security. Other computer systems for recording, accumulating and displaying medical information have a narrow specialization, are not adapted to the conditions

99114053

Device

Vartbaronov Rafael Aksendiosovich Mukhin Victor Aleksandrovich Borozdin Maxim Yurevich Khomenko Mikhail Nikolaevich Malashchuk Lyudmila Sergeevna Pokotilov Dmitry Vladimirovich Popov Alexander Yuryevich Bondarenko Ruslan Alekseevich Ryzhov Evgeny Ivanovich

polymodal registration of biotechnological signals at the stands and in this regard are not adapted to the conditions of rotation in a centrifuge.

The proposed device eliminates the disadvantages of the known, since it significantly extends the functionality of the prototype, provides its use in the most severe conditions of rotation in a centrifuge and allows, in contrast to the known one, to carry out the polygraphic registration, display, accumulation and processing of medical information necessary for an operational assessment of the functional state of a person -operator in rotation on a centrifuge and other medical stands with a posteriori processing of the obtained experiments mental results.

The technical result of the invention is to increase the information content, noise immunity and expand the functionality of automated medical information systems operational

assessment of the state of a human operator under the influence of overloads of various directions due to the development of additional hardware and software tools that provide removal, conversion, amplification, display, registration, accumulation and a posteriori processing of large amounts of medical information through 16 measuring channels with digital indication of 5 parameters in real time.

The proposed technical result is achieved by the fact that the centrifuge is installed a set of hardware and software tools that provide removal, conversion, amplification, display, registration and processing of the following biometric and technical parameters, allowing to evaluate the functional state of the human operator, as well as the state of the environment and life support equipment :

-electrocardiograms in 3 leads (3 channels),

- pneumograms (1 channel),

blood pressure in the vessels of the ear (2 channels),

- ear photopulse plethysmograms (2 channels),

-forces of foot pressure on the pedals (1-2 channels)

overload (1 channel),

- marks of a tangent and a doctor-researcher (2 parameters on channel 1),

Psychochronograms (3 parameters on 1 channel).

The structural diagram of the proposed device such as a system of operational medical control (SOMK) is presented in Fig. 1. The system includes:

Sensors of physiological and technical parameters (D1-D11);

signaling devices;

-block amplifying-converting devices (BUPU);

-BUPU power supply unit;

- matching device;

-6-channel recorder-cardiograph type

-4-channel oscilloscope;

-specialized PC, including a system unit such as IBM RS / AT-486 with RAM of at least 8 MB, equipped with an additional interface board that provides information input device operation, SVGA display, laser printer, keyboard and pointing device

-device for inputting information into a personal computer (multiplexer for 16 measuring medical and technical channels);

-block alarm control;

-device alarm dangerous conditions;

- Remote control unit for the operation of the amplifier-conversion modules (UPM) in the BUPU unit.

A brief description of the structural and operational features of the various components of the COMC is provided.

Sensors The PPG sensor records the photoplethysmogram of the ear vessels using the light flux passing through the earlobe. The sensor elements are powered from the corresponding UP module of the BUPU unit (Fig. 1). During processing, the initial PPG signal is amplified, differentiated, and integrated to isolate the variable and constant components, which allow obtaining information about the amplitude of the ear pulse (AUP) and blood filling of the earlobe (KNU). Due to significant individual differences in the amplitude of the recorded parameters, remote balancing of the KNU channel and adjustment of the AUP gain using the UPM control unit located in the control room are provided.

The systolic blood pressure sensor in the earlobe (ADU) records the photoplethysmogram of the earlobe, which is subjected to periodic compression by forcing air under a miniature rubber membrane. Measurement of ADU is carried out in the mode of increasing the pressure of the membrane. The sensor is equipped with photo resistance and an incandescent bulb, operates on a reflected light flux. In the UPU block, the PPG signal is amplified and partially differentiated in order to eliminate the isoline drift during compression. When measuring the ADU, two parameters are simultaneously recorded: PPG and pressure values under the sensor membrane in the form of a sequence of impulse marks (OTM) following every 20 mmHg. Art. The set-reset and pressure measurement in the pneumatic system is carried out using a pressure switch installed in the corresponding UP-module. The cycle of the pressure automatic machine (BP) occurs according to the scheme: a linear set of pressure with a given speed of up to 170 or 220 mm Hg, quick reset to zero in 1-2 s and an adjustable pause (set within 1-7 s). The inclusion of blood pressure and the amplitude of the PPG are made from the control room using the UPM control unit.

ECG sensors are 4 silver chloride electrodes in the form of disks connected via shielded wires to the amplifier-conversion module. The generated and pre-amplified signals of standard ECG leads are processed using tunable band-pass filters, additionally amplified and fed through the collector to the control room. In order to ensure high noise immunity, ECG electrodes are placed on the chest in the Neb leads and fixed with wide rubber bands or adhesive plaster.

The pneumogram is recorded using a rubber sensor with a filler in the form of coal powder. The sensor responds to changes in the perimeter of the chest and is used to measure the frequency of respiratory movements and the duration of breath holding.

Unlike the indicator of radial overload on the control panel of the engineer-operator, the sensor installed in the cab shows the value of the resulting overload.

Minute pulmonary ventilation is recorded using a photo-optical sensor that counts the number of revolutions of the micro-rotator installed in the inspiration channel of a serial oxygen mask. Sealing the oxygen mask is achieved by attaching it to the flight headset using adjustable length of cloth straps.

The pressure force of the feet on the pedals is recorded using strain gauges that measure the degree of deflection of an elastic steel plate under the sole of the subject’s shoes. The information signal is generated by a strain gauge amplifier in the corresponding UP module in the BUPU unit. There are 2 measuring channels - for the right and left legs. Typically, the total pressure exerted on the pedals of both legs is recorded, but if there are free channels, separate recording of signals is possible.

The pressure in the chambers of the anti-overload suit (PPC) is measured using a serial pressure sensor of the DMD type, connected to the hose from a pressure machine, with a measuring range of up to 1 atm. The power supply of the sensor, balancing and amplification of the output signal are carried out using the corresponding amplification-conversion module in the control unit.

The pressure in the submask space is measured in the same way as in the control panel, however, the measuring range of the sensor should not exceed 0.3 atm.

The signal is recorded by the operator’s tangents and the doctor’s marks on one channel, and amplitude separation of pulses is used to separate the signals. The doctor’s mark is recorded when a button is pressed in the control room and is designed to fix certain moments of the experiment. The tangent is a lever on the handle, constantly held by the operator in the centrifuge’s cabin, which only works when it is released, which means that the test subject refuses to continue the test. The state of the tangent is also monitored by the hazardous signaling device - when the tangent is released during the rotation of the centrifuge, the corresponding sound and light alarms on the control panel of the responsible physician are turned on, and a command to stop the centrifuge rotation is automatically issued.

Signaling devices are designed for the rapid assessment of the response time to various light signal sources located on the light screen in the central and peripheral fields of view of the tester (psychochronogram), as well as for determining visual acuity during exposure to overload. The light screen includes a glowing cross in the center and 3 pairs of bulbs located in the horizontal field of view at angles of 5, 15 and 30 degrees. Each pair of bulbs can be switched on manually by buttons installed in the control unit of the signaling devices. By pressing the signal button, the operator in the centrifuge’s cabin turns off the lit bulb, which determines the speed of his reaction to the light stimulus. To separate signals corresponding to different fields of view, amplitude modulation of pulses is used.

Determination of visual acuity is performed without registration on a computer terminal using a light board that is turned on from the control panel with a tablet with Landolt rings attached to it based on an oral report of the test subject after the centrifuge has rotated.

The block of amplifying and converting devices (BUPU) provides: installation of 12 amplifying and converting modules (UPM) into the sockets, supplying them with supply voltages, signals from sensors and the control unit of the UPM, removing output signals. The UP modules that are part of the unit perform the following functions:

- form the supply voltage (currents) with the specified parameters necessary for the operation of the sensors;

-produce the primary processing of information, the allocation and amplification of useful signals;

- provide compaction of individual channels of information transfer by transmitting discrete signals from several sensors on a single communication line using amplitude modulation: generating a 3-level signal when registering the latent period of the reaction time to 3 groups of light stimuli, etc.

The UPM control unit is designed to control the operating modes of the amplifier-converter modules in the BUPU unit with the aim of balancing and adjusting the gain of individual measuring channels, selecting bandpass filter parameters for processing ECG lead signals, as well as for turning on / off the automatic pressure switch.

The information input device (UVI) is a software-controlled 16-channel multiplexer. Input circuits have galvanic isolation according to power supply, corresponding to electrical safety requirements of GOST. The exchange of information between UVI and a specialized PC is carried out using an additional interface board installed in the PC system unit.

The matching device is intended for level matching and selection of analog signals supplied to a registrar-cardiograph and a 4-channel oscilloscope.

The registrar-cardiograph is designed for selective registration on paper in real time of operational medical and technical information. Allows during the experiment to observe the dynamics of changes in the state of the tester, to classify various types of cardiac abnormalities, to determine the values of the recorded parameters at given points in time.

A 4-channel oscilloscope provides the current presentation of ECG waveforms (in 3 leads) and the pulse component of the blood supply to the earlobe, allowing the team leader personally to continuously monitor the condition of the tester during the experiment.

The control unit for signaling devices is installed on the control panel of the team leader’s doctor, designed to supply light signals located in the central and peripheral fields of view of the tester, presenting a light panel for a fixed time to determine visual acuity during exposure to overload. Provides a light indication of stimuli delivered.

and sound signaling of the following events (listed in descending order of priority):

- release of tangents (two-tone sound signal);

- lack of response to the presented light stimulus for 1 (or 2) seconds (sound signal with a high tone of sound);

- delayed response to a light stimulus (accompanied by an audio signal with a low tone);

In the event that two or all three of the listed events occur simultaneously, then only one sound signal is given corresponding to the event with the highest priority.

Specialized PC is designed to display, accumulate and process the information received. An additional interface board is installed in the computer system unit, which provides control of the information input device and analog-to-digital conversion of information signals. The following minimum requirements are imposed on individual PC elements:

processor type 486 with a clock frequency of at least 66 MHz;

- RAM capacity - not less than 8 Mb;

- RAM of the laser printer - at least 2 MB.

The work of a specialized PC is as follows. After conversion and amplification, the analogue electrical signals are fed to the input of the multiplexer, then to the additional interface board, and the PC is received in digital form. The necessary information is displayed on the display screen, on the printer and can be copied to the ROM on the instructions of the doctor-user. Specialized PC operates in the following modes:

- a mode of accumulation of information in real time,

-mode of viewing and processing information accumulated over the entire experiment,

-mode of printing the results of the experiment.

In the mode of accumulating information in real time, operations are performed on the screen to prepare the system for operation, it is possible to start and restart the mode of accumulating information, automatically processing cardio intervals, and controlling the input of necessary information from sensors to the computer.

In the mode of viewing information, it is possible to assess the quality of the information received, an express analysis of the results of the experiment, and in the future - conducting a posteriori processing of scientific information and assessing compliance with safety measures for the experiment.

In the printing mode of the obtained results, after selecting data on the screen, the print settings for the printer are set and a copy is printed from the screen.

Examples of printing of biometric parameters recorded using the device at various speeds of drawing, including under the action of overloads in a centrifuge, are presented in Fig. 2-5.

Thus, the proposed device allows you to implement the following functional tasks:

- input into the computer memory of biometric and technical information that reflects the state of the operator and environmental parameters through 16 measuring channels with a continuous recording time of up to 34 minutes;

-representation on the monitor in real time of any set of 16 registered analog signals and digital indication of 5 parameters;

-automatic processing of cardio intervals in the modes of measuring heart rate, scatterogram and histogram;

-Sample registration on paper in real time of operational medical and technical information;

-representation on a 4-channel oscilloscope of diagnostically important physiological signals for continuous operational monitoring of the condition of the tester during the experiment, carried out personally by the responsible physician-leader of the team;

- semi-automatic processing of the amplitude-time characteristics of all registered analog signals;

- listing of all registered analog signals, the results of automatic processing of cardio intervals, the output of passport data and the full contents of all information channels with a given density corresponding to the speed of the recorder from 30 min / page. up to 200 mm / s,

- execution of a partial stop command when information is recorded on only one channel,

-implementation of control of signaling devices and parameters of amplifier-conversion modules (UPM),

-alarm, forecasting and diagnostics of various levels of dangerous state of the operator when exposed to overload,

-operative assessment of the performance of means of anti-overload protection and life support under the influence of overload.

The advantages of the proposed device over the known are as follows:

- multichannel registration of biometric and technical information simultaneously on 16 measurement channels, adapted to the rotation conditions in a centrifuge;

- increased noise immunity of the measuring channels due to a significant increase in the level of transmitted signals (range from -10V to + 10V) in the block of amplifying and converting devices, which makes it possible to practically record physiological signals at a great distance (30-50m) from the biological object;

- simplicity of hardware-software control and high reliability of the system during an expensive experiment, eliminating the loss of recorded information;

- the ability to automatically create a backup copy of the file;

- long duration (up to 34 min) of continuous accumulation of information and high readiness (up to 10s) of the system to start and restart.

Claims (1)

An automated device for recording, displaying and processing medical information about a person’s condition, characterized in that it is used under the influence of overloads in a centrifuge and includes sensors for recording three leads of an electrocardiogram, pneumogram, spirogram, blood pressure in the ear vessels, ear photopulse plethysmogram, foot dynamograms, pressure in the chambers of the control panel and in the mask space, overload values, operator marks; signaling devices of psychochronogram and clamping tangents; block amplifier-converting devices (BUPU); unit for remote control of operating modes of BUPU modules; two stabilized balanced power supply units BUPU (± 12v); PC data input device (16-channel multiplexer); personal computer type IBM RS / AT-486 or higher; specialized interface board in the PC system unit; alarm control unit; information display devices (SVGA type monitor, 8-12 channel recorder with matching device, laser printer); hazard signaling devices located on the panel of the experimenting physician (light and sound threshold indicators of the psychochronogram and tangent states); connecting cables; software and software providing registration, accumulation, display, printing, storage and a posteriori processing of medical information about the state of a human operator under conditions of rotation in a centrifuge.