Device for carrying out continuous monitoring of cardiac activity

FIELD: medical engineering.

SUBSTANCE: device has electrodes, preamplifier, microprocessor, memory units of upper and lower level, comparison units, threshold units, unit for producing alarm signal, magnetic recorder, acoustic signalization unit, high frequency generator, amplitude modulator, modulating code oscillator, phase manipulator, power amplifier, transmitting antenna, retuning unit, heterodyne, mixers, intermediate frequency amplifier, detector (selector), amplitude restrictors, synchronous detector, phase detectors, spectrum width measurement units, phase doubler, phase rotator by +90°, adder, multiplier, narrow band filters, amplitude detector, phase divider by 2, phase rotator by +30°, phase rotator by -30° and subtraction units.

EFFECT: improved noise immunity.

3 dwg

 

The proposed device relates to the field of medical equipment, namely to design devices for the transfer of electrocardiogram radio, and can be used in practical institutions of health, including in the system of the ambulance, in the system of distance counselling centres.

Known devices for continuous monitoring heart activity and for diagnosing diseases of the heart (ed. mon. No. 1811380, 1814538; RF patents №№2128004, 2181258, 2232545 and others).

Known devices closest to the proposed is a Device for continuous monitoring of the heart activity (patent RF №2232545, And 61 In 5/04, 2002), which is selected as a prototype.

The specified device provides objective information about the state of the hearts of the observed person in real production conditions and about developing acute cardiovascular disorders.

However, the known device has a relatively low robustness to narrowband interference.

An object of the invention is to increase the noise immunity of the device by suppressing narrowband interference.

The problem is solved in that the device for continuous monitoring of the heart activity, containing series-connected electrodes, prior the first amplifier, the amplitude modulator, a second input connected to the output of the high-frequency generator, a phase manipulator, a second input connected to the output of the generator modulating code, the power amplifier and transmitting antenna series the receiving antenna, the first mixer, the second input is through a local oscillator coupled to the output block adjustment, the first intermediate frequency amplifier, an adder, a multiplier, a second input connected to the output of the receiving antenna, the first notch filter, peak detector, a second key, a second input connected to the output of the adder, the first doubler phase meter width of the spectrum of the second harmonic signal, the second block comparison, the second input is through measuring the spectrum width of the signal connected to the output of the second key, the second threshold unit, the second input is through the delay line is connected with its output, the first key, a second input connected to the output of the second key, the first amplitude limiter, a synchronous detector, a second input connected to the output of the first key, and the microprocessor is made in the form of the first unit of comparison, the memory blocks of the lower and upper levels and an adjustable first threshold unit whose output is the output of the microprocessor, the output of which is input to the first bakarania, which are connected respectively to the memory blocks of the lower and upper levels and to the first threshold unit, sequentially connected to the output of the first threshold unit of the microprocessor of the processing unit and the alarm unit sound signals, sequentially connected to the second output of the local oscillator of the first phase shifter to +90°, the second mixer, a second input connected to the output of the receiving antenna, the second intermediate frequency amplifier, and the second phase shifter 90°, the output of which is connected to the second input of the adder connected to the output of a synchronous detector magnetic recorder, a second input connected to the second output unit the formation of an alarm signal, with the control input of the block adjustment is connected to the output of the second threshold unit, the first phase detector connected to the output of the first amplitude limiter, comes with a second amplitude limiter, divider phase two, the second narrowband filter, Phaser +30°, Phaser at -30°the third phase shifter +90°, second and third phase detectors, two blocks subtraction, and to the output of the doubler phase are connected in series to the second amplitude limiter, the divider phase two, the second narrowband filter, Phaser on +30°the second phase detector, a second input connected to the output of the first amplitude limiter, the first subtraction unit, a third phase shifter +90° and a second subtraction unit, the second input is through the first phase detector coupled to the output of the second narrow-band filter, and the output connected to the third input of the magnetic recorder, the output of the second notch filter connected in series Phaser at -30° and a third phase detector, a second input connected to the output of the first amplitude limiter, and the output connected to the second input of the first subtraction unit.

Structural diagram of the device is presented in figure 1. Frequency chart explaining the process of formation of additional receiving channels are presented in figure 2. Timing diagrams explaining the principle of operation of the device shown in figure 3.

The device comprises a series-connected electrodes 1, a preamplifier 2, the amplitude modulator 12, a second input connected to the output of the generator 11 high frequency, phase arm 14, a second input connected to the output of the generator 13 modulating code, power 15 power and transmitting antenna 16, consistently included receiving antenna 17, the first mixer 20, the second input is through the local oscillator 19 is connected to the output of block 18 of perestroika, the first amplifier 21 intermediate frequency, an adder 38, a multiplier 39, vtoro the input connected to the output of the receiving antenna 17, the first narrow band filter 40, the amplitude detector 41, the second key 42, a second input connected to the output of the adder 38, the doubler 30 phase meter 31 spectrum width of the second harmonic signal, the second block 32 comparison, the second input is through the meter 29 spectrum width of the signal connected to the output of the key 42, the second threshold unit 33, the second input is through the line 23 to the delay is connected with its output, the first key 24, a second input connected to the output of the key 42, the amplitude limiter 25, synchronous detector 26, a second input connected to the output of the key 24 and the microprocessor 3, made in the form of the first block 5 comparison of memory blocks of the bottom 4 and top 6 levels, and an adjustable first threshold unit 7, the output of which is the output of the microprocessor 3, the entrance of which is the input of the first block of 5 comparisons, which are connected respectively to the memory blocks of the bottom 4 and top 6 levels and to the first threshold unit 7 sequentially connected to the output of the first threshold unit 7 of the microprocessor 3 block 8 of the formation of the alarm and the unit 10 audible alarm connected in series to the second output of the local oscillator 19, the first phase shifter 34 +90°, the second mixer 35, a second input connected to the output of the receiving antenna 17, the second amplifier 36 intermediate frequency and storoymaterialy 37 +90° whose output is connected to the second input of the adder 38, connected in series to the output of the doubler 30 phase of the second amplitude limiter 27, the divider 43 phase two, the second narrow-band filter 44, the first phase detector 28, a second input connected to the output of the amplitude limiter 25, the second block 51 subtraction and magnetic Registrar 9, the second and the third input of which is connected to the output of a synchronous detector 26 and the second output unit 8 of the formation of an alarm signal, respectively, connected in series to the output of the notch filter 44 Phaser 45 +30°the second phase detector 47 second input connected to the output of the amplitude limiter 25, the first block 49 subtraction and the third phase shifter 50 to +90°, the output of which is connected to the second input unit 51 subtracting sequentially connected to the output of the notch filter 44, the phase shifter 46 to -30° and the third phase detector 48, a second input connected to the output of the amplitude limiter 25, and the output connected to the second input of block 49 subtraction. The control input unit 18 realignment connected to the output of the threshold unit 33. The probes 29 and 31 of the spectrum width, the doubler 30 phase, block 32 comparison and threshold unit 33 constitute the detector (selector) 22 QPSK signals. As block 18 realignment used generator drank brasego voltage.

Device for continuous monitoring of the heart activity is as follows.

The electrodes 1 are attached to the monitored person (athlete, driver, desktop, patients with various cardiovascular disorders and diseases, etc. in places removing ECG, which largely depends on the quality of the shooting electrocardiogram.

Recorded by electrodes 1 cardioseal m(t) (Fig 3,a), passing through the pre-amplifier 2, is fed to the first input of the amplitude modulator 12, the second input of which is applied a high-frequency oscillation output from the generator 11 high frequency (Fig 3, b)

u1(t)=U1cos(ω1t+ϕ1), 0≤t≤T1,

where U1that ω1that ϕ1, T1- amplitude, carrier frequency, initial phase, and the duration of harmonic oscillations.

The output of the amplitude modulator 12 produces a signal with amplitude modulation (AM), (3,)

u2(t)=U2[1+m(t)]cos(ω1t+ϕ1), 0≤t≤T1,

where

K1- the ratio of the amplitude modulator;

m(t) - law amplitude modulation.

AM signal u2(t) arrives at the first input of the phase manipulator 14, to the second input of which receives the modulating code M(t) (Fig 3,d), which digitally the code contains brief information about the monitored person, for example last name, first name, year of birth, etc. On the output of the phase manipulator 14 is formed a complex signal with a combined amplitude modulation and phase shift keying (AM-FMN) (Fig 3, d)

u3(t)=U3[1+m(t)]cos[ω1t+ϕk(t)+ϕ1], 0≤t≤T1,

where

To2- transfer coefficient of the phase manipulator;

ϕk(t)={0,π} - manipulated component phases, reflecting the law of phase manipulation in accordance with the modulating code M(t) (Fig 3, d), and ϕk(t)=const kτE<t<(k+1)τEand may change abruptly at t=kτei.e. at the boundaries between elementary parcels (k=1, 2,..., N-1);

τE·N is the duration and the number of basic assumptions which form the signal duration T1(T1=N·τE).

This signal, after amplification in the amplifier 15 of the power radiated by the transmitting antenna 16 in the air, the admission antenna 17 and is supplied to the first inputs of the mixer 20 and 35, the second inputs of which are served voltage of the local oscillator 19, respectively:

where UGthat ωGthat ϕG, TP- amplitude, initial frequency, initial phase, and the repetition period;

- the speed is changed is I lo frequency in the specified frequency range f;

At the output of the mixers 20 and 35 are formed of the voltage Raman frequencies. Amplifiers 21 and 36 are voltage differential (intermediate) frequency:

where

To3- gain mixers;

ωCR1G- intermediate frequency; ϕCR1G.

These stresses are complex signals with a combination of amplitude modulation, phase shift keying and linear frequency modulation (AM-FMN-chirp).

The voltage uAC2(t) from the output of the amplifier 36 intermediate frequency is fed to the input of the phase shifter 37 to +90°, the output of which produces a voltage

Voltage uPR1(t) and uAC3(t) are fed to the two inputs of the adder 38, the output of which is formed by the total voltage

where UΣ1=2UCR.

This voltage is applied to the second input of the multiplier 39, at the first input of which receives the received signal u3(t). At the output of the multiplier 39 is formed voltage

where

To4- transfer coefficient of the multiplier.

Frequency settings ωfnarrowband filter 4 is selected equal to the initial frequency ω 1lo 19 ωfG.

Therefore, the bandwidth of the narrowband filter 40 reaches the voltage u4(t), which after detecting the amplitude detector 41 is supplied to the control input key 42, opening it. In the initial state, the keys 24 and 42 are always closed.

The voltage uΣ1(t) from the output of the adder 38 through the public key 42 to the input of the detector (selector) 22 consisting of the first 29 and second 31 measures the width of the spectrum of the doubler 30 phase, block 32 comparison and threshold unit 33.

At the output of the doubler 30 phase voltage is formed

u4(t)=U4[1+m(t)]cos(2ωCRt-2πγt2+2ϕCR),

where

in which phase shift keying already present.

Spectrum width Δf2the second harmonic signal is determined by the duration of T1signal,

while the spectral width Δfcthe received signal is determined by the duration of τEhis elementary parcel,

i.e. the spectral width Δf2the second harmonic signal is N times smaller than the width of the spectrum Δfcinput

Therefore, by multiplying the phase of the AM-FMN-chirp signal on two of its range "sorachi the W" N times. This circumstance allows to detect AM-FMN-chirp signal even when its power at the input of the device is less than the noise power and interference.

Spectrum width Δfcthe input signal is measured using a meter 29, and spectrum width Δf2the second harmonic signal is measured using a meter 31. Voltage Ucand U2proportional Δfcand Δf2accordingly, outputs of the probes 29 and 31 of the spectrum width is fed to two input block 32 comparison. Since Uc≫U2then the output of block 32 comparison produces a positive pulse which is compared with the threshold voltage Uthenin the threshold block 33. The threshold voltage Uthenexceeded only upon detection of AM-FMN-chirp signal. When exceeding the threshold Uthenin the threshold block 33 is formed by a DC voltage is supplied to the control input unit 18 realignment, turning it in the stop mode, the input to the delay line 23 and to the control input key 24, opening it.

From this point in time view of the specified frequency range f and search for AM-QPSK signals terminated at the time of registration of the detected S-QPSK signal, which is determined by the delay time τCline 23 delay.

At the termination of the restructuring of the local oscillator 19 by the adder 38 : what is the voltage

which through the public keys 42 and 24 to the input of the amplitude limiter 25 and the synchronous detector 26. The output of the amplitude limiter 25 is formed QPSK signal (figure 3, e)

where UOgrethe threshold limit;

which is supplied to the second input of the synchronous detector 26. In the synchronous detection on the output of a synchronous detector 26 is formed of a low-frequency voltage (figure 3, g)

uH1(t)=UH1[1+m(t)],

where;

To5- the transfer rate synchronous detector.

Proportional to the source cardiomegaly m(t), this voltage is fed to the input of block 5 comparison of the microprocessor 3, which compares the recorded signal of a specific patient with the set for a normal person the upper and lower limit values received at block 5 comparison with blocks 4 and 6 memory upper and lower levels. When the deviation of the values recorded signal at its maximum allowable value, an alarm adjustable threshold unit 7, including the block 10 an audible indication and a magnetic recorder 9. Last writes for 5...10 seconds and registration of pathological process on the portable cartridge. The unit power done by the is from the portable power source (not shown).

The voltage u4(t) from the output of the doubler 30 phase is fed to the input of the amplitude limiter 27, the output of which produces a voltage (Fig 3, C)

which is fed to the input of the divider 43 phase two. The output of the last formed voltage (figure 3,)

given a narrow-band filter 44, is used as the reference voltage and is supplied to the reference input of phase detector 28, the information input of which receives the voltage u5(t) from the output of the amplitude limiter 25. The output of phase detector 28 is formed of a low-frequency voltage (3 to)

uH2(t)=UH2cosϕk(t)

where;

To6- gain of the phase detector;

Proportional to the modulating code M(t) (Fig 3, d). This voltage is fed to the first input unit 51 of the subtraction.

If the air acts narrowband interference

uP(t)=UPcos(ωPt+ϕP),

frequency ωPwhich is slightly different from the intermediate frequency ωCRthe received signal

ωPkr=Δω≤Δωf,

where Δωfthe bandwidth of the phase detectors 28, 48 and 49;

the additive mixture is taken FMN-si is Nala u 5(t) and narrowband interference uP(t)

uΔ(t)=u5(t)+uP(t)

from the output of the amplitude limiter 25 is supplied to the first inputs of the phase detectors 28, 47 and 48.

The reference voltage u0(t) (Fig 3, and with the output of the narrow-band filter 44 simultaneously arrive at the inputs of the phase 45 and 46 +30° -30°, the output of which is formed corresponding voltage:

served on the second inputs of the phase detectors 47 and 48. The output of the phase detectors 28, 47 and 48 in this case, there are the following low-frequency voltage, respectively:

where;

The output of the first block 49 subtraction produces the following differential voltage:

ΔuH1(t)=uH4(t)-uH5(t)=UH{cos[(ωPCR)t+ϕPCR-30°]-cos[(ωPCR)t+

PCR+30°]}=2UNsin[(ωPCR)t+ϕPCR]·sin30°=

=UH·sin[(ωPCR)t+ϕNCR].

The analysis of the received differential voltage ΔuH1(t) shows that it is an estimate of the noise component, which is different from the jamming component mainly Cana is th turn of phase by +90° .

Differential voltage ΔuH1(t) from the output of block 49 of the subtraction is fed to the input of phase shifter 50 to +90°, the output of which produces a voltage

ΔuH2(t)=UHcos[(ωPCR)t+ϕPCR],

which comes to the second input unit 51 subtraction. The output of the last formed following differential voltage (3 to)

ΔuH3(t)=uH3(t)-ΔUH2(t)=uH2·cosϕk(t)

in which the interfering element is missing.

This voltage is fixed magnetic Registrar 9.

Thus, the magnetic recorder 9 provides registration information about the patient and his pathological data on the cardiovascular system.

Time delay τCdelay line 23 is selected such that it was possible to record information about the patient and his pathological data on the cardiovascular system on the magnetic tape. After this time, the voltage output from the delay line 23 is fed to the reset input of the threshold unit 33 and dumps its contents to zero. The block 18 of the adjustment mode adjustment. And the key 24 is closed. I.e. they must be in their original condition.

From this point in time view of the specified frequency range f and search for AM-QPSK signals continues the I.

In case of detection of the next S-QPSK-signal operation of the device is similar.

The above operation corresponds to the case of reception of signals through the main channel at the frequency ω1(figure 2).

If a false signal (interferer) is taken as the image channel frequency ω3

the amplifier 21 and 36 are the following voltage:

where;

ωCRgC- intermediate frequency;

ωpgC.

The voltage uWP5(t) from the output of the amplifier 36 intermediate frequency is fed to the input of the phase shifter 37 to +90°, the output of which produces a voltage

Voltage up(t) and up(t)received at the two inputs of the adder 38, the output offset.

Therefore, a false signal (interferer)taken by the image channel frequency ω3suppressed.

For a similar reason is suppressed and a false signal (interferer)taken by the first Raman channel at the frequency ωk1(figure 2).

If a false signal (interferer), adopted by the second Raman channel at the frequency ωk2

the amplifiers 21 and 36 intermediate frequency allocated voltage:

where;

ωCRk2-2ωg- intermediate frequency;

ϕpk2g.

The voltage up(t) from the output of the amplifier 36 intermediate frequency is fed to the input of the phase shifter 37 to +90°, the output of which produces a voltage

Voltage up(t) and up(t) are fed to the two inputs of the adder 38, the output of which is formed by the total voltage

where UΣ3=2Up

This voltage is applied to the second input of the multiplier 39, at the first input of which receives the received signal uk2(t).

At the output of the multiplier 39 is formed voltage

where;

which does not fall within the bandwidth of the narrowband filter 40. The key 42 is not opened and a false signal (interferer)taken by the second Raman channel at the frequency ωk2suppressed.

For a similar reason suppressed and false signals (interference), accept other Raman channels.

The device may be made in the modifications intended for patients thevarious cardiovascular disorders, disease or predisposed to them (arrhythmia, pre - and postinfarction condition, extrasystole, ischemic heart disease), enter the reference information to the microprocessor, which will be the comparison of the recorded signals. For example, a patient with a predisposition to paraxial tachycardia will be monitored cardiac cycles, in the case of arrythmia - periodicity, the number and shape of extrasystoles, myocardial ischemia, a programming device is configured to compare the amplitude, direction and duration of waves and intervals of the ECG.

The device provides remote obtain objective information about the condition of the heart in real conditions of social and industrial life, provides individual remote monitoring of heart activity in a specific patient, promptly notifies you of the appearance of different objective signs of acute cardiac disorders and, consequently, increases the efficiency of therapeutic and rehabilitative activities. This remote control is carried out simultaneously with the heart activity of several patients, which use radio signals of different frequencies and modulation codes, which transmit in addition to kardiosignalas still and patient information.

The device can be used in PR is a preventive cardiology research in practical work with the appropriate contingent, in sports medicine, aerospace flight for diagnosis and prevention of disorders and abnormalities of cardiac activity among truck drivers.

Thus, the proposed device is compared with the prototype provides increased robustness of the radio channel. This is achieved by suppression of narrowband interference photocomposition method.

Device for continuous monitoring of the heart activity, containing series-connected electrodes, pre-amplifier, an amplitude modulator, a second input connected to the output of the high-frequency generator, a phase manipulator, a second input connected to the output of the generator modulating code, the power amplifier and transmitting antenna series the receiving antenna, the first mixer, the second input is through a local oscillator coupled to the output block adjustment, the first intermediate frequency amplifier, an adder, a multiplier, a second input connected to the output of the receiving antenna, the first notch filter, peak detector, a second key, a second input connected to the output of the adder, the doubler phase meter width of the spectrum of the second harmonic signal, the second block comparison, the second input is through measure concentration of the fir spectrum width of the signal coupled to the output of the second key, the second threshold unit, the second input is through the delay line is connected with its output, the first key, a second input connected to the output of the second key, a synchronous detector, a second input connected to the output of the first key, and the microprocessor is made in the form of the first block comparison of memory blocks of the lower and upper levels and an adjustable first threshold unit whose output is the output of the microprocessor, the input of which is the input of the first unit of comparison, which are connected respectively to the memory blocks of the lower and upper levels and to the first threshold unit, sequentially connected to the output of the first threshold unit microprocessor unit formation alarm and block the audible alarm, connected in series to the second output of the local oscillator of the first phase shifter to +90°, the second mixer, a second input connected to the output of the receiving antenna, the second intermediate frequency amplifier and a second phase shifter to +90°, the output of which is connected to the second input of the adder connected to the output of a synchronous detector magnetic recorder, a second input connected to a second output of the processing unit of the alarm, while the control input of the block adjustment is connected to the output of the second threshold unit, the first phase detector connected to what hodom first amplitude limiter, the inlet of which is connected to the output of the first key, wherein it is provided with a second amplitude limiter, divider phase two, the second narrowband filter, Phaser +30°, Phaser at -30°the third phase shifter +90°, second and third phase detectors, two blocks subtraction, and to the output of the doubler phase are connected in series to the second amplitude limiter, the divider phase two, the second narrowband filter, Phaser +30°the second phase detector, the second input is connected to the output of the first amplitude limiter, the first subtraction unit, a third phase shifter +90° and a second subtraction unit, the second input is through the first phase detector coupled to the output of the second narrow-band filter, and the output connected to the third input of the magnetic recorder, the output of the second notch filter connected in series Phaser at -30° and a third phase detector, a second input connected to the output of the first amplitude limiter, and the output connected to the second input of the first subtraction unit.



 

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3 dwg

FIELD: medical engineering.

SUBSTANCE: system has device for measuring and recording biopotentials, device for measuring and recording movement parameters having the first accelerometer, the second accelerometer, the third accelerometer, the first instrumentation amplifier, the second instrumentation amplifier, the third instrumentation amplifier, multi-channel analog-to-digital converter, microcontroller, long-term storage, the first external interface adapter, timer, data analysis device comprising computer, graphic display unit, the second external interface adapter and system interface backbone. The first, the second and the third accelerometers are connected via the first, the second and the third instrumentation amplifiers to multi-channel analog-to-digital converter input cannels. The analog-to-digital converter is connected to the microcontroller. The microcontroller has long-term storage, external interface adapter and timer. The external interface adapter input/output serves as external interface adapter input/output of the device measuring and recording movement parameters. The device for measuring and recording biopotentials is connected to input channel of the device for measuring and recording movement parameters comprising microcontroller input via the second data transfer channel. The first and the second external interface adapters are connected to each other via the first data transfer channel. The computer and the second external interface adapter are connected to each other via system interface backbone. The graphic display unit is connected to the computer.

EFFECT: wide range of functional applications; high diagnosis accuracy.

7 cl, 1 dwg

FIELD: medicine; obstetrics.

SUBSTANCE: fetal cardiac rhythm is registered. Additionally cardiointervalography is performed with determination of spectral power density of maternal and fetal cardiac rhythm waves and selection of very low frequency VLF, low frequency LF and high frequency HF levels, regulator system tension index TI, cortizol and adrenaline level in maternal and fetal blood. Physiological pregnancy course is defined at adrenaline level of 28 ng/mol, cortizol level of 360 ng/ml, indices of VLF=120 relative units, LF=40 r.u., HF=20 r.u., TI=70 r.u., for the mother and at indices of VLF=25 r.u., LF=2 r.u., HF=1 r.u., TI=250 r.u. for the fetus; compensated form of chronic fetoplacental deficiency is detected at the adrenaline level of 46 ng/ml, cortizol level of 695 ng/ml, VLF=180 r.u., LF=50 r.u., HF=100 r.u., TI=160 r.u. for the mother and at VLF=45 r.u., LF=5 r.u., HF=1 r.u., TI=400 r.u. for the fetus; and decompensated form of chronic fetoplacental deficiency is detected at the adrenaline level of 2 ng/ml, cortizol level of 1003 ng/ml, VLF=900 r.u., LF=25 r.u., HF=10 r.u., TI=30 r.u. for the mother and at VLF=3 r.u., LF=1 r.u., HF=0 r.u., TI=700 r.u. for the fetus.

EFFECT: improved accuracy and information capacity of diagnostics of physiological pregnancy course and chronic fetoplacental deficiency forms.

1 dwg, 9 tbl

FIELD: medicine.

SUBSTANCE: electrodes of electric ECG potential registration are placed in zone of aorta and in zone of cardiac apex. Changes of electric potential on body in time are registered in form of diagram of ECG function. Near each electrode of ECG electric potential registration additional electrode is installed, onto which high-frequency signal from generator is supplied, and from electrodes of ECG electric potential registration modulated by fluctuations of arterial blood flow signal is obtained synchronously, said signal is amplified, converted into digital code and transmitted for rheogram registration to information processing unit, after which connection of ECG electric potential with change of pressure according to rheogram is connected in each phase, and phase peculiarities of arterial pressure change are diagnosed. Device for synchronous registration of rheogram from ECG electrodes consists of two ECG electrodes, commutator, first amplifier, first band filter, analogue-digital converter, controller, IR transmitter and information processing unit with first detector, commutator being inserted between electrodes and first amplifier, whose outlet through band filter is connected with first inlet of analogue-digital converter, whose outlet is joined to controller, whose first outlet is connected with commutator, and second outlet - with IR transmitter, connected with first detector of information processing unit. Two additional electrodes, second amplifier, second band filter, second detector and generator, switched to additional electrodes, are introduced into it, second commutator outlet is connected to inlet of second detector, whose output through second amplifier and second band filter is connected with second inlet of analogue-digital converter.

EFFECT: synchronous registration of phase characteristics of cardiac cycle and corresponding fluctuations of arterial pressure in heart vessels and aorta.

2 cl, 3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to devices of medico-biological purpose, intended for registration and evaluation of fast-proceeding physiological reactions, emerging as response to produced stimuli. Device contains microcontroller, analogue-digital converter (ADC), first commutator, sensors of breast breathing, abdominal breathing, skin-galvanic response, arterial pressure, cardio-vascular activity, sensor of motor activity, power unit, preliminary amplifiers, signal amplifiers, filters, first and second digital-analogue converters (DAC), tool amplifier and unit of connection with personal computer, supplied with galvanic attenuator. Via amplifiers and filters sensors are connected with corresponding inputs of commutator whose controlling input is connected with first microcontroller bus, and output - with first input of tool amplifier. Second input of tool amplifier is connected to output of first DAC, third input - to output of second DAC, and output - to ADC input. Inputs of first and second DAC and group of inputs-outputs of ADC are connected with second microcontroller bus, whose third bus is connected to unit of connection with personal computer. Additional channel has possibility of connection to its input of face mimics sensor, piezoplethysmogram or variable component of skin-galvanic response and includes second electronic commutator, to whose outputs subchannels of processing of signals from corresponding sensor are connected. First subchannel includes successively connected preliminary amplifier and filter, second subchannel - preliminary amplifier, filter, signal amplifier and additional filter, and outputs of subchannels via third electronic commutator are connected to first commutator input. Controlling input of third commutator is connected with microcontroller.

EFFECT: registration of maximal number of physiological parametres and ensuring objectivity of obtained information.

2 cl, 2 dwg

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