The aging population poses a global challenge for blood services.

Background: The Finnish transfusion registry data suggest some alarming signals and future challenges that are likely to be faced by transfusion services as populations continue to age.

Study Design And Methods: Computerized data collection was performed on all potentially transfused patients in Finland, thus covering approximately 70% of all blood usage. We simulated the red blood cell (RBC) usage according to the Finnish practice on different age groups but the population demographics from other countries.