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 shock testing, resistance testing, impedance testing, off current testing, and hla testing using test accessories without duplicating the report.The report was cleared and did not reoccur.An internal inspection of the device found no discrepancies.The main board was 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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