Corrected count increment (platelet transfusion)
Assesses response to platelet transfusion and screens for refractoriness.
Inputs
1 of 5Actual (total) body weight
× 10⁹/L
× 10⁹/L
× 10¹¹
Patient values are shared with every calculator.
When to use
- 10 to 60 minutes after platelet transfusion.
Pearls and pitfalls
- Below 5,000–7,500 at 1 h on two consecutive transfusions suggests refractoriness; check HLA antibodies.
- One apheresis unit contains about 3–4 × 10¹¹ platelets.
Why use
Standard refractoriness screen.
CCI = (post − pre platelet count, × 10⁹/L) × BSA (m²) ÷ platelets transfused (× 10¹¹)