Mentzer index
Separates thalassemia trait from iron deficiency in microcytic anemia.
Inputs
0 of 2fL
× 10¹²/L
When to use
- Microcytic anemia.
Pearls and pitfalls
- Below 13 favors thalassemia trait; above 13 favors iron deficiency. Confirm with iron studies and hemoglobin electrophoresis.
Why use
Free, instant screen from the CBC.
Mentzer index = MCV (fL) ÷ RBC count (× 10¹²/L)