Getinge usa sales, llc (importer) is submitting this report on behalf of maquet critical care ab (manufacturer).Ref.Exemption #: (b)(4).Getinge usa sales, llc (b)(4).Contact person:(b)(4).The anesthesia workstation was investigated by our company field service engineer (fse).The nozzle units in the gas modules were replaced but was never returned.Therefore, no parts have been received for investigation.The investigation is based on the information given in the problem description and an evaluation of the received device logs.The problem description states that there were strange vibration and noise during operation.We have not received information stating at exactly what time the vibration and noise occurred.During the reported event day, no alarms for high or low o2 concentration or high or low agent concentration are present in the event log.Prior to the event day, several alarms for low fio2 were generated but there are no reports of vibrations and noise at that time.The measured parameter values in the trend log corresponds to the settings most of the time but during a time period of 15 minutes on the event day, irregularities in pressure, flow and volumes can be seen simultaneously as alarms such as etco2: low, leakage, respiratory rate: high, expiratory minute volume: low and airway pressure: high were generated.We have not been able to determine the true cause of the experienced event.
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