The investigation was solely performed based on the information provided by the dispatched service technician as the device log was not available.During on-site analysis the reported ventilator failure could be confirmed and the unit was found to have lost all information.In consequence the pcb control and the ventilator assembly were replaced.Afterwards, the unit was successfully tested according to manufacturer's specification.As the fabius is 17 years old it can be assumed that wear and tear has caused the failure of single components.In case the fabius shuts down automatic ventilation, the device will generate an audible alarm and a visible alarm message "ventilator fail" will be displayed.In this case automatic ventilation is not possible.The user can switch to manual ventilation as described in the instructions for use.Monitoring is still functional.The device has reacted as specified by posting corresponding alarms to inform the user about the situation.The number of similar cases, related to the same root cause, is within the expected range of the respective risk assessment and thus accepted.
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