Lab Notes - 6
What is the RPI and how is it calculated:
The Reticulocyte Production Index is a correction of the corrected retic count due to length of time retics are spending in peripheral blood. This length of time correlates with the Hct
RPI = corrected Retic
          # days in p.b
Correlation of Hct and # days in p.b:
Hematocrit
# Days in p.b
45%
35%
25%
15%
1
1.5
2
3