The anesthesia workstation was investigated on site by the hospital personnel, no service was requested.Additional information such as performed service intervention, defective or replaced part has been requested but not received.The device logs were received and show that two successful system check outs were performed on the date of the event.One system check out was performed before the event and one after the event when the system had been set to standby.The technical log has no recordings related to the event.There were a lot of switches between ventilation modes such as man, prvc, and pressure support during the recorded ventilation period.The internal log contains clinical alarms such as respiratory rate: high, regulation pressure limited and airway pressure: high and the issues seem to have been started after the system had been switched to prvc.The trend log shows that the ppeak pressure and respiratory rate had variations on different occasions during the period.We have not been able to fully determine why these variations occurred but in combination with the generated alarms regulation pressure limited, airway pressure: high and respiratory rate: high it may be an indication of a blockage (most likely in the breathing circuit)but we have not been able to determine the source or location of the possible blockage.(b)(4).Ref.Exemption #: e2018003.(b)(4).
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