The device was returned to zoll medical corporation for evaluation.The customer's report was not replicated or confirmed.The device passed all testing including full functionality testing and stress testing without duplicating the report.Review of the device log on the reported event date of 11/24/2020 shows that there were cpr pads attached to the device.The device was in rescue mode and auto selected to the correct lead view.Two seconds after the impedance was acquired, it was lost and the pads registered as off.There are several connects and disconnects based on the defib id's which appear to be troubleshooting, but a signal was not acquired again for the duration of the case.This may indicate there is a coupling issue when the pads are attached to the patient, or as the customer indicated, an issue with the electrode pads.The customer indicated a wire may have been detached from the electrode pads, but they were not returned as part of the investigation.Analysis of reports of this type has not identified an increase in trend.
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