Sorin group (b)(4) manufactures the s5 gas blender system.The incident occurred in (b)(4).This medwatch report is being filed on behalf of sorin group (b)(4).Sorin group received a report that the s5 gas blender system did not deliver the correct amount of oxygen during a procedure.There was no report of patient injury.A sorin group field service representative was dispatched to the facility to investigate.During testing, the service representative confirmed the reported issue and observed that no oxygen was being mixed in, though the flow was correct.There were no alarms.The device was replaced and the replacement unit was powered up.No further issues were observed.The replaced gas blender was returned to sorin group (b)(4) for further investigation.Visual inspection did not identify any defects or abnormalities.The unit was tested and the error was reproduced.Troubleshooting identified the mass-flow meter/controller to be causing the issue.The component was replaced and the unit was disinfected and cleaned.A test run was performed and no further issues were discovered.A functional check, technical safety inspection and calibration were carried out without issue.A review of the dhr did not identify any deviations or non-conformities relevant to the reported issue.Sorin group (b)(4) will continue to monitor for trends related to this type of issue.
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