1. What is a BSA Chemo Calculator?

Definition: This calculator estimates Body Surface Area (BSA) based on weight and height, using the Mosteller formula.

Purpose: It helps medical professionals determine appropriate chemotherapy drug dosages which are often calculated based on BSA.

2. How Does the Calculator Work?

The calculator uses the Mosteller formula:

Where:

• \( BSA \) — Body Surface Area (square meters)
• \( W \) — Weight (kilograms)
• \( H \) — Height (centimeters)

Explanation: The product of weight and height is divided by 3600, then the square root is taken to calculate BSA.

3. Importance of BSA Calculation

Details: Accurate BSA calculation is crucial for determining chemotherapy doses, as many anticancer drugs are dosed based on BSA to maximize efficacy while minimizing toxicity.

4. Using the Calculator

Tips: Enter the patient's weight in kilograms and height in centimeters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is BSA used for chemotherapy dosing?
A: BSA correlates better with drug metabolism and excretion than body weight alone, leading to more accurate dosing.

Q2: What's the most common formula for BSA?
A: The Mosteller formula shown here is widely used, though DuBois and Haycock formulas are also available.

Q3: When would I need to calculate BSA?
A: For chemotherapy dosing, some antibiotic dosing, and calculating cardiac index in critical care.

Q4: How accurate is this calculation?
A: The Mosteller formula is accurate within 1-2% of more complex calculations for most adults.

Q5: Does this calculator work for children?
A: Yes, the Mosteller formula is appropriate for both adults and children.