SU789103A1 - Device for diagnosis of acquiredy valvular disease - Google Patents

Description

The invention relates to medical technology, in particular to cardiological diagnostic tools, and is intended for the diagnosis of aortic insufficiency against the background of mitral stenosis. A device for diagnosing acquired heart defects is known, comprising a septron unit and a distance calculating unit connected in series. In this device, the septron unit contains a ceramic transducer, a fiber light guide, a photocell, and a juice 1 photo kit. However, this device does not allow to isolate aortic insufficiency against the background of mitral defect, which reduces its functional efficiency. The purpose of the invention is to ensure the release of aortic insufficiency against mitral vice. The goal is achieved by introducing pho tocardiogram, electrocardiogram, electrosphere signal with amplifiers, antidistolic noise extractor and frequency correction amplifier connected in series, and now the minimum signal isolation unit and the classifier connected to it, with the frequency correction amplifier output connected to the septron unit, and the outputs of the distance calculating unit are connected to the minimum signal extraction unit, while the septron unit consists of five septas ones, of which one has a static mask, and the rest - bandstop mask Moreover, the minimum signal extracting unit is formed by two comparators, two inverters and four anbshogovyh keys, wherein the comparator inputs intended for connection to the calculating unit outputs. distances, and the outputs of each comparator are directly and via inverters connected to analog switches. In addition, the distance calculating unit is designed as a single inverter, four current amplifiers blocking masks, four integrating amplifiers and a block of potentiometers, with the output of the inverter and the corresponding amplifier of the blanking mask connected to the first inputs of the integro-summing

amplifiers, and the outputs of the potentiometer are connected to their second inputs.

The drawing shows a block diagram of a device for the diagnosis of acquired heart defects.

The device contains a phonocardial signal sensor 1 (FCC), an electrocardiogram signal sensor 2 (ECS), an electrostimigram signal sensor 3 (ESS), the corresponding amplifiers 4-6 in series with them, an antidiastolic noise extractor 7, a frequency correction amplifier 8, a septron unit, a distance calculation unit, a minimum signal extraction unit and a classifier 9, made in the form of a comparator. The block of septrons is made in the form of five septrons 10 -.14 with parallel-connected entrances, with one septron 10 having a static mask, and the other septrons 11-14 having fencing masks.

The distance calculation block contains an inverter 15, amplifiers of 16 19current blocking masks, a block

20 potentiometers, four-integrating amplifiers 21 - 24. Moreover, the input of the inverter 15 is connected

With the output of the septron 10, the output of the inverter 15 is connected to the inputs of the integrating amplifiers 21-24, and the amplifiers 16-19 of the currents of the blanking masks are connected in series between the corresponding septronagchi 14 and the integro-summing amplifiers 21-24. The output of the block 20 potentiometers is connected to the inputs of each integro -summing amplifier.

The minimum signal extraction unit contains comparators 25 and 26, inverters 27 and 28, and four analog switches 29–32. Moreover, the inputs of each comparator 25 and 26 and analog switches 29–32 are connected to the outputs of the corresponding pair of integro-summing amplifiers 21-24. The output of the comparator 25 is connected to the input of the inverter 27 and the input of the analog switch 29, and the output of the inverter 27 is connected to the input of the analog switch 30. The output of the comparator 26 is connected to the input of the inverter 28 and the input of the switch 31, and the output of the inverter 28 is connected to the input of the switch 32-.

The device works as follows. .

An automatic insertion of a portion of the anti-diastolic noise is made in the selector 7, which receives the amplified signals from the sensors 1 3 superimposed on the patient.

The selected signals of antidiastolic noise are amplified by an amplifier 8, at the output of which signals are frequency-corrected to eliminate the unevenness of the frequency characteristics of the septrons. Further, the signals arrive in parallel to the septrons 10-14.

This device considers the case of recognizing signals into two classes A (mitral stenosis) and A (aortic insufficiency against the background of mitral stenosis), and each class is represented by two standards A and Aj (mitral stenosis) and A, Hell (combined mitral

mitral and aortic heart disease).

The operation of the septron unit and the distance calculation unit can be described by the following expression

,, b, a

where r

the output signal of the calculator pa; static mask current

(a) from the reference signal;

3 (% static mask current from recognizable signal;

Ti

blocking mask current

.al performed on the reference signal, when applying a recognizable signal to the septrons.

The septron unit operates in two modes (learning and recognition). In the training mode, the static mask current from the reference signal is measured and rejection masks are made by applying reference signals to the septrons. In the recognition mode on the septron 10, a current of 3 ° -1: 3) of the static mask is determined when the recognized signal is applied to it. On septrons 11 and 12, currents are measured,) and .A) fencing masks, made according to two standards A and first class (mitral stenosis), when applying: a recognizable signal. On septrons 13 and 14, currents 3 (t), Ai) and obstruction masks, manufactured according to two standards A and A of the second class (a combined mitral-aortic defect), are measured on its recognized signal.

The output signal of the septron 10 is inverted by the inverter 15 and fed to the integrating amplifiers 21 - 24. The output signals of the septrons 11-14 are amplified K-times by the corresponding amplifiers 16-19 and are fed respectively to the integro-summing amplifiers. At the same time, in the latter, the values of the currents of static masks from the reference signal are inputted from the blocks of 20 potentiometers.

After determining the distance from the recognizable signal to the standards Al | and A first and A and A | Class II at Comparators 25 and 26 compares the signals

Claims (3)

Claim 1. A device for diagnosing acquired heart defects containing a septron unit and a distance calculation unit connected in series, characterized in that, in order to isolate aortic insufficiency against the background of mitral defect, sensors of a photocardiological signal, an electrocardiological signal with amplifiers, an anti-diastolic noise detector and an amplifier with frequency correction connected in series, as well as a block for extracting the minimum signal and a classifier connected to it, and the output of the amplifier with a frequency orrektsiey connected to septronov unit, and outputs the distance calculation unit associated with the minimum signal selection unit, wherein the unit consists of septronov septronov five, of which one has a static mask, and the rest - bandstop mask. 2. The device pop. 1 of t n and - ³ sistent in that the block allocation · minimum signal is in the form of two comparators, two inverters and four analog switches, the inputs of comparators prednaz • 0 nacheny for connection to the output of the distance calculation, and the output of each comparator - directly and through inverters are connected respectively to analog keys. 3. The device according to claim 1, characterized in that the distance calculation unit is made in the form of one inverter, four amplifiers 20 bodies of currents of blocking masks, four integro-summing amplifiers and potentiometer blocks, and the output of the inverter and the corresponding amplifier of currents of blocking masks 25 are connected to the first inputs of integro-summing amplifiers, and the outputs of the block of potentiometers are connected to their second inputs.