Normal hematocrit is 45%. What is the RPI for this patient with a reticulocyte count of 5% and hematocrit of 25%?
A) 2.39
B) 2.59
C) 1.39
D) 4.50

Question

Quizplus · Accepted Answer

The Reticulocyte Production Index (RPI) is calculated to adjust the reticulocyte count for the degree of anemia and is given by the formula: (Reticulocyte count % × Patient's hematocrit / Normal hematocrit) / Maturation correction factor. For a hematocrit of 25%, the maturation correction factor is approximately 2. Therefore, RPI = (5% × 25%) / (45% × 2) = 1.39.

Normal Hematocrit Is 45