Which of the following blood products is kept in a -20 degrees Celsius freezer?

Cryoprecipitate is the correct choice among the options provided because it is a blood product that requires storage at temperatures of -20 degrees Celsius or lower. This temperature helps maintain the stability and effectiveness of the clotting factors present in cryoprecipitate, primarily fibrinogen and factor VIII.

Cryoprecipitate is produced from the fresh frozen plasma after it has been thawed and can be stored in frozen conditions to prolong its shelf life. Proper storage at -20 degrees Celsius ensures that the product remains viable for transfusion purposes when needed, especially in cases of bleeding disorders or surgical interventions requiring additional clotting factors.

In contrast, cryoglobulin is typically kept refrigerated rather than frozen, while immune globulin and albumin products have their own specific storage requirements that do not involve freezing at -20 degrees Celsius. This distinction is crucial for maintaining the functional integrity of each blood product.