UNCONJUGATED ESTRIOL

Description of Event or Problem

THE CUSTOMER REPORTED FALSELY DEPRESSED UNCONJUGATED ESTRIOL RESULTS FOR SEVEN PATIENT SAMPLES USING KIT LOT 515 ON AN IMMULITE 2000 XPI INSTRUMENT. THE ERRONEOUS RESULTS WERE REPORTED TO AND QUESTIONED BY THE PHYSICIAN(S). THE SAMPLES WERE REPEATED ON AN ALTERNATE IMMULITE 2000 XPI USING KIT LOTS 515 AND 518 AND THE TRUE RESULTS WERE STILL NOT KNOWN. THE SAMPLES WERE THEN TESTED USING A NON-SIEMENS INSTRUMENT AND THE RESULTS WERE HIGHER THAN THE IMMULITE 2000 XPI RESULTS. THE RESULTS OBTAINED USING THE NON-SIEMENS INSTRUMENT WERE REPORTED AS THE CORRECT RESULTS TO THE PHYSICIAN(S). THERE ARE NO KNOWN REPORTS OF PATIENT INTERVENTION OR ADVERSE HEALTH CONSEQUENCES DUE TO THE FALSELY DEPRESSED UNCONJUGATED ESTRIOL RESULTS.

Additional Manufacturer Narrative

AN OUTSIDE THE UNITED STATES (OUS) CUSTOMER CONTACTED A SIEMENS REMOTE SUPPORT CENTER TO REPORT FALSELY DEPRESSED UNCONJUGATED ESTRIOL RESULTS OBTAINED ON SEVEN PATIENT SAMPLES USING KIT LOTS 515 AND 518 ON AN IMMULITE 2000 XPI INSTRUMENT. QUALITY CONTROL RECOVERED WITHIN ACCEPTABLE RANGES ON THE DATE OF TESTING. PER THE LIMITATIONS SECTION OF THE UNCONJUGATED ESTRIOL INSTRUCTIONS FOR USE (IFU): "FOR DIAGNOSTIC PURPOSES, THE RESULTS OBTAINED FROM THIS ASSAY SHOULD ALWAYS BE USED IN COMBINATION WITH THE CLINICAL EXAMINATION, PATIENT MEDICAL HISTORY, AND OTHER FINDINGS. " SIEMENS IS INVESTIGATING. NOTE: A SEPARATE MDR WILL BE SUBMITTED FOR RESULTS GENERATED USING KIT LOT 515.

Additional Manufacturer Narrative

SIEMENS FILED THE INITIAL MDR 1219913-2024-00468 ON 12-NOV-2024. ADDITIONAL INFORMATION 19-DEC-2024: SIEMENS EVALUATED THIS ISSUE AND PROVIDED THE FOLLOWING CONCLUSION: ADDITIONAL DATA AND TROUBLESHOOTING FILES WERE REQUESTED ON MULTIPLE DATES YET THE INFORMATION WAS UNABLE TO BE PROVIDED. A REVIEW OF THE AVAILABLE DATA SHOWED ADJUSTMENT AND QUALITY CONTROL (QC) RESULTS WERE WITHIN ACCEPTABLE RANGES ON THE DATE OF TESTING. IT IS UNKNOWN HOW THE SAMPLE WAS STORED BETWEEN TESTING ON THE IMMULITE 2000 INSTRUMENTS AND THE NON-SIEMENS INSTRUMENT. PER THE ¿SPECIMEN COLLECTION¿ SECTION OF THE ASSAY INSTRUCTIONS FOR USE (IFU), ¿ALTHOUGH SERUM SAMPLES HAVE BEEN REPORTED TO BE STABLE AT ¿20°C, UNPUBLISHED OBSERVATIONS SUGGEST A SMALL INCREASE OF APPROXIMATELY 10¿15% MAY OCCUR DURING STORAGE AT THIS TEMPERATURE. THEREFORE, IT IS PREFERABLE TO TRANSPORT AND STORE SAMPLES AT 2¿8°C AND ASSAY WITHIN ONE WEEK OF COLLECTION.¿ THE IFU FURTHER STATES ¿IT IS IMPORTANT THAT ALL SAMPLES DRAWN FOR SERIAL MONITORING OF A PATIENT'S UNCONJUGATED ESTRIOL LEVEL BE MEASURED USING THE SAME ASSAY SYSTEM, AND THAT ALL BE SUBJECTED TO THE SAME STORAGE CONDITIONS.¿ BASED ON THE INFORMATION ABOVE, IMMULITE 2000 UNCONJUGATED ESTRIOL LOT: 518 IS PERFORMING AS INTENDED. A PRODUCT PERFORMANCE ISSUE HAS NOT BEEN IDENTIFIED. NO FURTHER EVALUATION OF THE DEVICE IS REQUIRED. IN SECTION H6, THE INVESTIGATION FINDINGS AND INVESTIGATION CONCLUSION CODES WERE UPDATED.