ما المدة القصوى المعتادة لنقل وحدة كريات دم حمراء؟

What is the usual maximum time to transfuse a unit of red cells?

1. 12 hours
2. 4 hours
3. 8 hours
4. 24 hours

Answer: B) 4 hours. A unit is completed within 4 hours of leaving refrigeration to reduce bacterial growth risk.