Which product has a shelf life of 1 year when stored at -18C or lower?

• A. CPDA-1 preserved red blood cells
• B. Fresh frozen plasma
• C. Cryoprecipitated antihemophilic factor
• D. ADSOL preserved red blood cells

Answer: (C)

Storage at -18°C or colder keeps many plasma-derived products stable, but how long they remain usable depends on the component. Cryoprecipitated antihemophilic factor is prepared as a concentrated plasma product that remains stable when frozen, with labeling that allows about 12 months of storage at -18°C or colder. That long freezing stability is what makes it the best match for a 1-year shelf life in this context. The preserved red blood cell products have much shorter storage windows under cold conditions (weeks to a couple of months), so they do not meet the 1-year criterion.