Based on the logfile analysis, no indications for a device malfunction were found.Neither during nor before or after the reported event.The logfile show that the case was started at 6:08am using man/spont and continued in volume mode from 6:15am.The following ventilation was unremarkable and stable while the measured inspiratory o2 was >90% permanently.At 7:23am, the user switched over to volume af mode.In the following, while ventilation was still stable, the inspiratory o2 decreased to 45% around 8:00am and remained on this level for the remainder of the case.From 11:57am on, ventilation was continued using pressure support mode.At 12:33pm, the mode was changed to man/spont before the unit was placed in standby at 12:38pm.In general, the logfile analysis revealed that the ventilator as well as gas dosage were fully functional during the whole case.Patient gas measurement was operational, and the measured values were plausible.Finally, the reported symptom could not be understood from the logfile records.A dräger technician evaluated the device in follow-up to the event and no device error was found either.After testing, the device was returned to use with no further problems reported.
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