What is an invalidating environment

In order to speed up delivery of the defibrillator pulse, it is desirable to leave many of the applied parts connected to the patient; thus such applied parts should be able to withstand a pulse without causing an unacceptable risk.In general, a defibrillator proof specification is optional, however, particular standards may specify that it is mandatory (for example, ECG related).

Assuming the inductor has a resistance of 5Ω, and the remaining components are nominal values, the simulated nominal waveform is as follows (this simulation is based on differential step analysis, a excel sheet using the simulation allowing component variation can be downloaded here): The drop in peak voltage from the expected 5000V is due to the series resistance in the inductor creating a divider with the main 100Ω resistor.These versions roughly coincide with versions of Windows NT (see table below).Operating systems that use SLP 1.0 check for a particular text-string in a computer's BIOS upon booting.Manufacturers are generally only given a few SLP key by Microsoft.A royalty has been paid by the manufacturer if the board has a SLP key.This section covers the following topics related to defibrillator proof testing (defib testing): Potential hazards / Defibrillator pulse characteristics / Design considerations / Practical testing / Test equipment calibration The potential hazards associated with the use of a defibrillator when other equipment is connected to the patient are: All of these are addressed by IEC 60601-05 (Clause 8.5.5), although particular standards such as IEC 60601-2-27 (ECG, monitoring) may specify more detail in the compliance criteria.

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