SU1560232A1 - Defibrillator - Google Patents

Abstract

The invention relates to medical technology, namely defibrillators. The purpose of the invention is to increase the safety of defibrillation by limiting the duration and amplitude of the defibrillating impulse when the tissue is damaged by exposure. The device contains a master oscillator 1, amplifier 2, summing amplifier 3, piezoelectric transformer 4, comparator 5, shaper 6 duration, shaper 7 amplitude, first and second triggers 8.9, inverter 10. By damping oscillations of the piezoelectric transformer 4 on the signal the second input, as well as by reducing the amplitude of the pulse when the electrical properties of the tissue change, the damaging effect of the defibrillating pulse is reduced. 1 il.

Description

(2.1) 4373662 / 28-14

(22) 04 02.88

(46) 04.3090. Bul Number 16

(71) Blagoveshchensk State Medical Institute

(72) A. G. Kudrin, N.V. Rud, K.V. Semin and Yu. L. Spirin

(53) 615.475 (088.8}

(56) USSR Author's Certificate No. 1011129, cl. A 61 N 1/39, 1983

(54) DEFIBRILLATOR

(57) The invention relates to the field of medical technology, namely defibrillators. The purpose of the invention is to increase the safety of defibrillation by limiting the duration and amplitude of a defibrillating impulse in case of tissue damage by exposure. The device contains a master oscillator 1, amplifier 2, summing amplifier 3, piezoelectric transformer 4, comparator 5, shaper 6 duration, shaper 7 amplitude, the first and second triggers 8. 9, inverter 10. By damping the oscillations of the piezoelectric transformer 4 on the signal the second input, as well as by reducing the pulse amplitude, as the electrical properties of the tissue change, the damaging effect of the defibrillating pulse 1 slump decreases.

Joint venture 3d

uh

& E

YU

The invention relates to medicine, namely to defibrillators.

The purpose of the invention is to increase the safety of defibrillation by limiting the duration and amplitude of the defibrillating pulse when the tissue is damaged by exposure.

The drawing shows a schematic of a defibrillator.

nosti. At the output of the shaper 6 duration, the signal of the required duration triggers when a single level is turned on at the D input of the first trigger 8, the shaper 7 amplitude. The gain of the amplitude driver 7 is much greater than the gain of amplifier 2. Therefore, the pulse at the output of summing amplifier 3 will exceed the previous pulse of the sequence and excite

The defibrillator contains the driver

generator, amplifier 2, summing up 10 piezoelectric shock oscillation

amplifier 3, piezoelectric transfer transformer 4. The output signal of the piezoelectric generator 4, comparator 5, driver 6 of the electric transformer 4 of performance, driver 7 amplitude, defibrillation. In order for this high-first 8 and second 9 triggers, the inverter does not lead to a 10.volt impulse. The defibrillator works on the following general, g processes in the body, and the forced circuit is implemented in the defibrillator.

Output terminal defibrillator CRE lock. On the falling edge of the pulse with

Pits on the anterior surface of the thoracic outlet of the shaper 6 duration per spike. After that, a signal with a

The initial setup signal, which is a positive front, which sets the triggers 8, 9 to zero, 20 produces a blocking signal to the other input of the piezoelectric transformer 4, which cancels oscillations in the piezoelectric transformer 4. The forced switching of the piezoelectric transformer 4 also ensures its resonant amplitude frequency state.

The master oscillator 1 forms a sequence of short test pulses (solitons) that are amplified and fed into the body. The piezoelectric transformer 4 has an amplitude-frequency characteristic of the resonant type, and when mounting the defibrillator terminal on the body, the resonant frequency of the amplitude-frequency characteristic of the piezoelectric

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an electrical transformer 4 of a blocking signal, producing quenching of oscillations in a piezoelectric transformer 4. The forced switching of the piezoelectric transformer 4 is also provided by its resonant amplitude-frequency characteristic. The onset of degradation processes in the tissues of the body is accompanied by a sharp increase in current consumption from the defibrillator, which displaces the vibrant transformer 4 towards 30 °, the incremental shift of the low frequency resonance. The sequence of trial amplitude-frequency response characteristics

to low frequencies. In this case, a high pre-pulse allows us to determine the steady-state value of the resonant frequency of the piezoelectric transformer 4 and set the frequency of the output sequence of the master oscillator 1 close to it. The initial frequency of the master oscillator 1 exceeds the resonant frequency of the piezoelectric transformer 4 in idle mode (in the case when the terminal The defibrillator is not connected to the body).

As soon as the frequency of the pulse sequence becomes approximately equal to the steady-state resonant frequency of the piezoelectric transformer 4, the amplitude of the piezoelectric transformer 4, as well as a significant range of amplitude-frequency characteristic shift at a load resistance causes a sharp drop in voltage at the output due to a fixed frequency of the pulse sequence master oscillator 1.

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Claims (2)

Invention Formula A defibrillator containing a comparator, an amplitude driver and a test pulse form will exceed the duration threshold 45, the input and output of which are connected respectively to the output of the comparator and one input of the amplitude generator, in order to increase the safety of the defibrillation by limiting the duration and amplifying the comparator the signal at the output of which will stop the change in the frequency of the pulse sequence of the tunable master oscillator 1. A sequence of short, safe impulses with a frequency close to the frequency of the defibrillating impulse when the resonance of the piezoelectric trans-tissue damage is affected by the effect of the pulse; there is a series-connected master oscillator and amplifier, a piezoelectric transformer, the output of which is connected to the input of the comparator and the output low level on the D-inputs of the 55 defibrillator triggers, summing amplifier, 8 and 9. The test pulse of the steady-state output is connected to one input sequences from the output of a comparator piezoelectric transformer, one 5 is fed to the shaper 6, the longest input is connected to the output of the amplifier, and the drumaformer 4 with the connected load is fed to the body of the defibrillator and waits for a trigger signal. The trigger signal establishes unity. At the output of the shaper 6 duration, the signal of the required duration triggers when a single level is turned on at the D input of the first trigger 8, the shaper 7 amplitude. The gain of the amplitude shaper 7 is much greater than the gain of the amplifier. 2. Consequently, the pulse at the output of summing amplifier 3 will exceed the previous pulse of the sequence and excite piezoelectric shock bakes feed to another input piezo an electric transformer 4 of the interlock signal, producing quenching of oscillations in a piezoelectric transformer 4. The forced switching of the piezoelectric transformer 4 also ensures its resonant amplitude-frequency dependence of the piezoelectric transformer 4, as well as a significant range of amplitude-frequency characteristic shift when the load resistance changes, it drops sharply output voltages due to a fixed frequency of the pulse train 1 ora. 40 Invention Formula A defibrillator comprising a comparator, an amplitude driver and a duration generator, the input and output of which are connected respectively to the output of the comparator and one input of the amplitude generator, characterized in that, in order to increase the safety of the defibrillation, by limiting the duration and amplitude of the defibrillating pulse when the tissue is damaged by exposure, he 1560232 56 goy input - with a single output of a formative and piezoelectric transformer, amplitude rotator, inverter, input of which one input of master oscillator is connected connected to another output of the imaging device to the output of the comparator, another input specifies the amplitude, the first and second triggers, the generator is connected to the / - inputs of the cc-inputs of which are connected to the outputs of the 5th and second triggers and is one respectively, the shaper length of the defibrillator, and the D-inputs of the first and the inverter, and the outputs to the other inputs of the second flip-flops are its other accordingly, the amplitude of the output.