In immunohematology QC records, how long are records retained?

• A. 2 years
• B. 4 years
• C. 1 year
• D. 6 years

Answer: (D)

Retaining QC records for immunohematology for six years reflects the need to support thorough investigations, audits, and long-term quality analysis. QC data, including control results, reagent lots, instrument calibrations, and personnel actions, must remain accessible long enough to trace problems that may not emerge immediately and to review performance trends over multiple years. Accreditation and regulatory standards often specify six-year retention to ensure that the lab can respond to inquiries about transfusion safety, adverse events, or root-cause analyses with complete historical data. Keeping records for this period enables reliable investigations into potential QC failures, lot-specific issues, or instrumentation problems that could affect transfusion compatibility and patient safety. Shorter timeframes (like one, four, or two years) risk losing essential context needed to understand or resolve quality events that span beyond a single year, making six years the best fit for the goal of robust quality control and traceability.