Ganzoni Formula Calculator

Formula

To calculate the Iron Deficit (ID):

\[ \text{ID} = (\text{Hb}_{\text{target}} - \text{Hb}_{\text{current}}) \times \text{Weight} \times 2.4 + 500 \]

Where:

\(\text{ID}\) is the Iron Deficit in mg
\(\text{Hb}_{\text{target}}\) is the Target Hemoglobin Level in g/L
\(\text{Hb}_{\text{current}}\) is the Current Hemoglobin Level in g/L
\(\text{Weight}\) is the patient’s weight in kg

What is the Ganzoni Formula?

The Ganzoni formula is a clinical tool used to estimate the total iron dose required to correct iron deficiency anemia. It takes into account the patient’s weight, their current hemoglobin level, and the target hemoglobin level to calculate the iron deficit. This formula is particularly useful for determining the dosage of intravenous iron therapy.

Example Calculation 1

Let's assume the following values:

Target Hemoglobin Level (\(\text{Hb}_{\text{target}}\)) = 130 g/L
Current Hemoglobin Level (\(\text{Hb}_{\text{current}}\)) = 100 g/L
Weight = 70 kg

Using the formula:

\[ \text{ID} = (130 - 100) \times 70 \times 2.4 + 500 = 5560 \text{ mg} \]

The Iron Deficit is 5560 mg.

Example Calculation 2

Let's assume the following values:

Target Hemoglobin Level (\(\text{Hb}_{\text{target}}\)) = 140 g/L
Current Hemoglobin Level (\(\text{Hb}_{\text{current}}\)) = 110 g/L
Weight = 60 kg

Using the formula:

\[ \text{ID} = (140 - 110) \times 60 \times 2.4 + 500 = 4940 \text{ mg} \]

The Iron Deficit is 4940 mg.