Manufacturer's investigation conclusion: the reported event of f2: flow signal interrupted alarms was confirmed via the log file extracted from the returned centrimag console (serial number (b)(6), evaluated separately) during testing.The pump operated at ~3600 rpm on the reported event date of 02jun2022.Flow values were observed to range from approximately ~3.3 - ~5.0 lpm.Several f2: flow signal interrupted alarms were observed throughout the data beginning on 02jun2022 at 19:56; the alarms appeared to have activated due to the flow value fluctuating to 0 lpm, as the flow signal appeared to have intermittently lost communication with the system during these events.The system was observed to have been manually shut down at 20:15 on the same day, and no other notable events were observed.The centrimag motor (serial number unknown) was not returned for analysis.The root cause of the reported event was unable to be conclusively determined through this analysis.The 2nd generation centrimag system operating manual (rev.M) provides information regarding emergency/troubleshooting in section 10.The recommended practice whenever there is a console or motor malfunction is to replace the console and motor as a set.Remove the blood pump from the malfunctioning motor and console and place the blood pump in the back-up motor and console.Switch all components (console, motor, flow probe and cables) simultaneously to continue patient support, and then perform troubleshooting on the non-functioning system, when it is no longer being used for patient support.The 2nd generation centrimag system operating manual (rev.M) section 12.1 entitled "appendix i ¿ console alarms and alerts" contains a list of console alarms and alerts, including flow-related alarms, as well as appropriate operator response to these events.No further information was provided.The manufacturer is closing the file on this event.
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