AMDC : analisador microcontrolado de desfibriladores e cardioversores

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The effectiveness and safety of medical devices, such as defibrillators and cardioverters, require preventive maintenance and repair, which should be carried out in many instances near the hospital unit where the devices are being used. This work describes the development of a microcontrolled analyzer, which fulfills the requirements of a calibrating equipment, at a relatively low cost. The analyzer is powered by batteries, is self-sufficient and measures the following defibrillator output pulse parameters: 1) direct and reverse energy (four ranges, from 2 to 1,000J); 2) direct and reverse peak voltage and current (up to 6 kV); 3) ANSI/AAMI-DF2 tR, t50 and t10 rise rate (from 100ms to 200 ms); and 4) pulse width (from 100ms to 200ms). The defibrillating pulse waveform is shown on a 256x64-pixel LCD display. All measured parameters can be printed or transmitted to a record device. An internal resistive load (of 25, 50, 75, 100 or 125 O) simulates the transthoracic impedance of the human body. To test cardioverters, the analyzer simulates the QRS complex and measures the response time (delay between synchronous and cardioverter pulses). Laboratory tests performed with calibrated instruments (oscilloscope and generators) and field tests with different types of defibrillators have shown good performance of the prototype

ASSUNTO(S)

medicina - aparelhos e instrumentos medidores eletricos cardioversão eletrica eletroterapia

ACESSO AO ARTIGO

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