The device was returned to zoll medical corporation for evaluation.The customer's report was observed during review of the device data logs.However, the device was put through extensive testing including daily, weekly, and monthly self-test, on/off current, patient and circuit impedance testing, and shock testing without duplicating the customer's report.An internal inspection found no discrepancies.The main board and the capacitors were replaced as a precaution.The device was recertified and returned to the customer.Analysis of reports of this type has not identified an increase in trend.
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