Description of Event or Problem · 1
THIS REPORT SUMMARIZES MALFUNCTION EVENTS. A REVIEW OF THE EVENTS INDICATED THAT ONE (1) PATIENT SAMPLE TESTS USING THE ANTI-LEB REAGENT ON AN AUTOMATED BLOOD BANK SYSTEM PRODUCED AN UNEXPECTED NEGATIVE RESULT. THE RESULT REPRESENTED A FALSE NEGATIVE DUE TO PRIOR PATIENT HISTORIES OR, TESTING COMPLETED BY OTHER METHODS THAT DEMONSTRATED THE PRESENCE OF THE SPECIFIC ANTIBODIES. THE MALFUNCTION DID NOT SHOW A POSITIVE RESULT AS EXPECTED FOR THE ANTI-LEB ANTIBODY ON ONE (1) OCCASION. SUBSEQUENT TESTING OF REAGENT RETENTION LOTS, REVIEWS OF DESIGN HISTORY RECORDS AND REAGENT ANTIGEN VALIDATION TESTING OF THE INITIAL BULK PRODUCT USED FOR COMMERCIAL VIALING SHOWED ACCEPTABLE RESULTS. THROUGH POST EVENT TESTS AND INVESTIGATIONS, NO SPECIFIC CAUSES WERE DETERMINED FOR THE MALFUNCTIONS.