Review of alarm history confirmed the test failure at incoming as documented per this complaint.Driver testing was performed to replicate and identify the cause of the reported test failure.Manual manipulation of the airflow sensor cable produced a brief alarm but, once resolved, the alarm could not be duplicated.No asterisks were observed for cardiac output or fill volume display during cable manipulation.Observation run test did not produce additional alarms or cardiac output or fill volume display anomalies.The test failure could not be replicated, the root cause for the initial test failure is unknown.Alarm history data review completed as part of the investigation confirmed the alarm recorded during incoming testing but the investigation was unable to reproduce the reported test failure.During the investigation, the freedom driver met all acceptance criteria established per procedures, no device malfunction was found.This issue will be monitored and trended as part of the customer complaint process.Syncardia has completed its evaluation and is closing this file.If new or additional information is received in the future, syncardia will file a follow-up mdr.(b)(4) follow-up report 1.
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