inforMED
MalfunctionCEC

ALINITY I FREE T4 REAGENT KIT

Received Sep 29, 2025 · Event occurred Sep 14, 2025

Report 3005094123-2025-00483 · MDR key 23169320

Device

Generic name

Radioimmunoassay, Free Thyroxine

Catalog number

07P70-77

Lot number

73465UD01

Product problems

  • High Test Results
  • High Test Results

Patient

34 YR · Female

  • No Clinical Signs, Symptoms or Conditions
  • No Clinical Signs, Symptoms or Conditions

Narrative

Additional Manufacturer Narrative

AN EVALUATION IS IN PROCESS. A FOLLOW-UP REPORT WILL BE SUBMITTED WHEN THE EVALUATION IS COMPLETE. ALL AVAILABLE PATIENT INFORMATION WAS INCLUDED. ADDITIONAL PATIENT DETAILS ARE NOT AVAILABLE.

Description of Event or Problem

THE CUSTOMER OBSERVED A FALSELY ELEVATED ALINITY I FREE T4 RESULT FOR A 34-YEAR-OLD FEMALE PATIENT. THE FOLLOWING DATA WAS PROVIDED (CUSTOMER¿S NORMAL RANGE IS 9.01-19.05 PMOL/L): SAMPLE ID (B)(6) INITIAL RESULT WAS 64, REPEAT RESULTS WERE 11.71 AND 11.6 PMOL/L. THERE WAS NO IMPACT TO PATIENT MANAGEMENT REPORTED.

Additional Manufacturer Narrative

THE COMPLAINT INVESTIGATION FOR A FALSELY ELEVATED ALINITY I FREE T4 RESULT INCLUDED A SEARCH FOR SIMILAR COMPLAINTS, THE REVIEW OF COMPLAINT TEXT, TRENDING DATA, LABELING, DEVICE HISTORY RECORDS, AND TESTING OF RETAINED REAGENT KIT. ACCURACY TESTING WAS PERFORMED USING PANELS, WHICH MIMICS PATIENT SAMPLES, AND AN IN-HOUSE RETAINED REAGENT LOT KIT, STORED AT THE RECOMMENDED STORAGE CONDITION. TESTING MET ACCEPTANCE CRITERIA, AND THE PRODUCTS ARE PERFORMING AS EXPECTED. REVIEW OF TRACKING AND TRENDING DATA IDENTIFIED AN INCREASE IN COMPLAINTS FOR THE ALINITY I FREE T4 ASSAY AS WELL AS AN INCREASE IN COMPLAINT ACTIVITY FOR THE REAGENT LOT. HOWEVER, TESTING WAS PERFORMED UTILIZING A RETAINED KIT OF LOT 73465UD00, WHICH CONTAINS THE SAME BULK MATERIAL AS LOT NUMBER 73465UD01, AND NOTED THAT ALL TESTING PASSED, INDICATING THE REAGENT LOT IS PERFORMING AS EXPECTED. DEVICE HISTORY RECORD REVIEW DID NOT IDENTIFY ANY NON-CONFORMANCES OR DEVIATIONS FOR THE REAGENT LOT AND COMPLAINT ISSUE. MANUFACTURING DOCUMENTATION FOR THE REAGENT LOT WAS REVIEWED AND DID NOT IDENTIFY ANY ISSUES. LABELING WAS REVIEWED AND FOUND TO ADEQUATELY ADDRESS THE ISSUE UNDER REVIEW. BASED ON THE INFORMATION PROVIDED AND ABBOTT DIAGNOSTICS¿ COMPLAINT INVESTIGATION, NO SYSTEMIC ISSUE OR DEFICIENCY OF ALINITY I FREE T4, LOT NUMBER 73465UD01, WAS IDENTIFIED.

Description of Event or Problem

THE CUSTOMER OBSERVED A FALSELY ELEVATED ALINITY I FREE T4 RESULT FOR A 34-YEAR-OLD FEMALE PATIENT. THE FOLLOWING DATA WAS PROVIDED (CUSTOMER¿S NORMAL RANGE IS 9.01-19.05 PMOL/L): SAMPLE ID (B)(6), INITIAL RESULT WAS >64, REPEAT RESULTS WERE 11.71 AND 11.6 PMOL/L. THERE WAS NO IMPACT TO PATIENT MANAGEMENT REPORTED.