Retic Index Calculator

Formula

To calculate the Retic Index:

\[ RI = \frac{RBC \times HCT \times MCV}{100} \]

What is a Retic Index?

A Retic Index, or Reticulocyte Index, is a medical measurement used to evaluate the rate at which new red blood cells (reticulocytes) are produced and released by the bone marrow. This index is often used in diagnosing and monitoring conditions such as anemia or bone marrow disorders. A high Retic Index indicates an increased production of red blood cells, while a low index may suggest a decreased production.

Example Calculation 1

Let's assume the following values:

Red Blood Cell Count \( RBC \) = 5 million cells/µL
Hematocrit \( HCT \) = 45%
Mean Corpuscular Volume \( MCV \) = 90 fL

Step 1: Multiply the RBC by the HCT and the MCV:

\[ RBC \times HCT \times MCV = 5 \times 45 \times 90 = 20250 \]

Step 2: Divide the result by 100:

\[ RI = \frac{20250}{100} = 202.50 \]

Example Calculation 2

Let's assume the following values:

Red Blood Cell Count \( RBC \) = 4.5 million cells/µL
Hematocrit \( HCT \) = 40%
Mean Corpuscular Volume \( MCV \) = 85 fL

Step 1: Multiply the RBC by the HCT and the MCV:

\[ RBC \times HCT \times MCV = 4.5 \times 40 \times 85 = 15300 \]

Step 2: Divide the result by 100:

\[ RI = \frac{15300}{100} = 153.00 \]