The affected device was repaired by a third-party company and dräger was informed about the results.A log file was provided for analysis.However, the reported date of event was no longer included in the log entries as they were overwritten by new entries during further usage.The replaced part was not available for analysis.Based on the reported information the problem was fixed by replacing the pcb ccb-ii.A failure of this pcb could lead to the reported failure.However, due to the insufficient information the root cause could not be confirmed.In case of a significant deviation within the electronic system the device will perform a restart of the whole electronic system in an attempt to solve the issue.The restart is combined with an audible and visible alarm of high priority and the device opens the pneumatic system to allow for spontaneous breathing.If the failure is irreversible, the startup sequence cannot be finished resulting in a continued high priority audible alarm.In this case, the ifu describes that the customer has to disconnect the patient from the device and continue ventilation without delay using another independent ventilator.The number of similar cases is within the expected range of the respective risk assessment and thus accepted.
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