Anatomy Massive blood transfusion is defined as A 500 ml in 10 min B 250 ml in 5 min C 1 unit in 1 hour D 2500 ml or 5000 ml in 24 hours 💡 Explanation Massive blood transfusion is defined as ✓ Correct Answer: D. 2500 ml or 5000 ml in 24 hours