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Digital cardiac de fibrillator tester

Medical & Biological Engineering & Computing 17(6): 710-714

Digital cardiac de fibrillator tester

A knowledge of the performance of a defibrillator is essential; front panel meters, although calibrated in joules, read capacitor voltage only, and a loss of capacitance is not easily detected in use. Commercial defibrillatory testers employ analog circuitry and are no more reliable in calibration than defibrillators themselves. The design of a microprocessor-based defibrillator analyser is discussed which has a performance far superior to existing testers. It gives an absolute digital readout of the energy delivered into a standard 50 .OMEGA. load, the peak defibrillating voltage and the rise time of the defibrillator output wave. Facilities are provided for storage of the defibrillator output waveform, so that the profile can be examined on an oscilloscope.

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Accession: 005161878

PMID: 317911

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