After the event, the device was tested by a drager service technician without any finding.The electronic log file was downloaded and made available for further analysis.A first review revealed that this file only contained the device related entries but no user interactions, such as settings, readings of gas concentration, pressure and volume or alarms.Hence it was not possible to reconstruct the reported event and determine the root cause.The device related section of the log which would provide information regarding error situations did not contain any information indicating a device failure.Neither for the reported date and time of event, nor for the entire rest of the covered period of time.Finally the reported event could not be reproduced.The on-site-test has not revealed a device failure and neither did the analysis of the log.Even if the device is completely powered down it still provides the possibility to carry out manual ventilation.In this case an adequate o2 safety flow has to be set using the o2 safety flow valve.The user may also apply agent as long as a functional and filled vaporizer is connected to the device.With an adequate setting of the apl valve the patient can be manually ventilated using the integrated breathing system.
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