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 bench handling, impedance, and defib cycle testing without duplicating the report.An internal inspection of the device found no discrepancies.The device was recertified and returned to the customer.The battery used at the time of the report were not returned.Review of the logs showed the device is powered on and a "battery calibration required," prompt appears while not connected to auxiliary power.The battery calibration required message during device power on indicated that the device does not recognize the state of charge of the battery.This prompt continues throughout the log with multiple failed analysis attempts, pacer failures, charge failures, and defib failures being recorded throughout the event.The payloads associated with the errors in the json file indicate that the battery was below the 8v operating limit and could not charge the capacitor.Analysis of reports of this type has not identified an increase in trend.
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