ACCESS TOTAL T3 REAGENTS

Description of Event or Problem

ON (B)(6) 2024 THE CUSTOMER REPORTED OBTAINING ERRONEOUSLY ELEVATED TOTAL T3 RESULTS FOR ONE PATIENT INVOLVING THE LABORATORY'S ACCESS 2 IMMUNOASSAY ANALYZER (SERIAL NUMBER (B)(6). THE CUSTOMER PROVIDED THE FOLLOWING RESULTS (THE TOTAL T3 CUSTOMER REFERENCE RANGES ARE 0.87-1.78 NG/ML). THE FIRST QUESTIONED SAMPLE TOTAL T3 RESULT FOR THIS PATIENT WAS 2.37 NG/ML ON (B)(6) 2023. THIS SAMPLE WAS TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.64 (UNIT NOT PROVIDED). SAMPLE 2 TOTAL T3 RESULT WAS 3.05 NG/ML ON (B)(60 2024. THIS SAMPLE WAS TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.84 (UNIT NOT PROVIDED). SAMPLE 3 TOTAL T3 RESULT WAS 2.43 NG/ML ON (B)(6) 2024. THIS SAMPLE WAS TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.37 (UNIT NOT PROVIDED). SAMPLE 4 TOTAL T3 RESULT WAS 1.86 NG/ML ON (B)(6) 2024. THIS SAMPLE 4 WAS TESTED USING HETEROPHILE BLOCKING TUBE WITH A TOTAL T3 RESULT AT 1.89 NG/ML. THIS SAMPLE WAS ALSO TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.52 (UNIT NOT PROVIDED). THE SAMPLE 5 RESULT WAS NOT QUESTIONED: TOTAL T3 RESULT WAS 0.8 NG/ML ON (B)(6) 2024. THIS SAMPLE 5 WAS TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.75 (UNIT NOT PROVIDED). SAMPLE 6 TOTAL T3 RESULT WAS 2.53 NG/ML ON (B)(6) 2024. THIS SAMPLE 6 WAS TESTED USING HETEROPHILE BLOCKING TUBE WITH A TOTAL T3 RESULT AT 2.6 NG/ML. THIS SAMPLE WAS ALSO TESTED ON AN ALTERNATE INSTRUMENT WITH A RESULT AT 0.856 (UNIT NOT PROVIDED). THE CUSTOMER REPORTED A DELAY IN PATIENT TREATMENT. THE CUSTOMER REPORTED THAT DOCTOR LOOKS AT TEST RESULTS AND PRESCRIBES MEDICATION ON THE SAME DAY. DUE TO THE QUESTIONED RESULTS, PATIENT SAMPLES ARE SENT TO AN EXTERNAL TESTING LABORATORY AND THE RESULTS ARE PROVIDED ONE DAY LATER. NO HARDWARE ERRORS WERE REPORTED IN CONJUNCTION WITH THIS EVENT. CALIBRATION PASSED ON 20MAR2024 WITH REAGENT LOT 338710 AND CALIBRATOR LOT 338395. NO QUALITY CONTROL DATA WAS PROVIDED. SERVICE WAS DISPATCHED. FIELD SERVICE ENGINEER (FSE) CHANGED REAGENT AND CALIBRATION AND USED HETEROPHILE BLOCKING TUBES BUT THE RESULTS WERE UNCHANGED. NO ISSUES WITH SAMPLES INTEGRITY WERE REPORTED BY THE CUSTOMER. NOTE: THE CUSTOMER REPORTED THAT THE ACCESS FREE T4 RESULTS FOR THIS PATIENT WERE ALSO QUESTIONED. A SECOND MEDWATCH REPORT WILL ADDRESS THE QUESTIONED ACCESS FREE T4 RESULTS FOR THIS PATIENT.

Additional Manufacturer Narrative

A1: THE FULL PATIENT IDENTIFIER IS (B)(6). A2, A3, A4 AND A5: THE CUSTOMER DID NOT SUPPLY PATIENT DEMOGRAPHICS SUCH AS AGE, DATE OF BIRTH, SEX, WEIGHT, ETHNICITY OR RACE. H3 AND H6: THE ACCESS TOTAL T3 REAGENT WAS NOT RETURNED FOR EVALUATION. NO HARDWARE ERRORS, FLAGS WERE REPORTED IN CONJUNCTION WITH THIS EVENT. NO ISSUES WITH SAMPLES INTEGRITY WERE REPORTED BY THE CUSTOMER. SERVICE WAS DISPATCHED. FIELD SERVICE ENGINEER (FSE) REPLACED REAGENT AND CALIBRATOR PACK. THE FSE ALSO TESTED SOME SAMPLES USING HETEROPHILE BLOCKING TUBES BUT THE RESULTS WERE UNCHANGED. IN CONCLUSION, THE CAUSE OF THIS EVENT CANNOT BE DETERMINED WITH THE AVAILABLE INFORMATION. THERE IS NO EVIDENCE TO REASONABLY SUGGEST THAT A MALFUNCTION OCCURRED IN CONJUNCTION WITH THIS EVENT. NOTE 1: A SECOND MEDWATCH REPORT WILL ADDRESS THE QUESTIONED FREE T4 RESULTS FOR THIS PATIENT. NOTE 2: A SECOND PATIENT WITH QUESTIONED FREE T4 AND TOTAL T3 RESULTS WAS REPORTED ON (B)(6) 2024. TWO OTHER MEDWATCH REPORTS WILL ADDRESS THE QUESTIONED TOTAL T3 AND FREE T4 RESULTS FOR THIS SECOND PATIENT.