Reticulocytes - 3
Formulas for calculating retic results:
Reticulocyte Production Index (RPI)
 corrected retics 
maturation time
2.0
24 – 33
3.0
< 15
2.5
15 - 23
1.5
34 - 38
1.0
39 – 44
Maturation Time
Pt’s Hct