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/monthly self-testing, on/off current testing, and patient/circuit impedence testing without duplicating the report.An internal inspection found no discrepancies.The main board and 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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