(b)(4).The carefusion failure analysis engineer examined the 3100b ventilator and found that, it is functioning normally.Calibrated known good patient circuit to this unit then the unit was set-up per the unit¿s top cover ventilator performance checks label.Unit was then operated, on and off, for two weeks.It was observed that the unit operated within the prescribed parameters during the entire test with no problems.Removed covers from unit and could find no problems.Check power supply voltages and found no problems.Could not duplicate the complaint allegation that there was a loud noise and the ventilator shut down.(b)(4).
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The customer reported that while in patient use the ventilator shut down.They quickly replaced the circuit thinking there was a leak, but were not able to power the machine back on.They did not notice "alarms," but did state they were alerted to the incident.She was told that the patient was transferred to a conventional ventilator and there was no patient compromise.
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