1. What is the Haycock Formula?

The Haycock formula is specifically designed for calculating body surface area (BSA) in infants and children. It provides a more accurate estimation than formulas developed for adults, accounting for the different body proportions in pediatric populations.

2. How Does the Calculator Work?

The calculator uses the Haycock formula:

Where:

• \( W \) — Weight in kilograms (kg)
• \( H \) — Height in centimeters (cm)
• \( BSA \) — Body surface area in square meters (m²)

Explanation: The formula uses exponential relationships between weight, height and body surface area to provide accurate estimates for infants.

3. Importance of BSA Calculation

Details: BSA is crucial in pediatrics for determining medication dosages, fluid requirements, and nutritional needs. It's more accurate than weight-based dosing for many medications.

4. Using the Calculator

Tips: Enter weight in kilograms and height in centimeters. Ensure measurements are accurate as small variations can significantly affect results in infants.

5. Frequently Asked Questions (FAQ)

Q1: What age range is this formula appropriate for?
A: The Haycock formula is most accurate for infants and children up to about 12 years old.

Q2: How does this differ from adult BSA formulas?
A: Pediatric formulas account for different body proportions (relatively larger heads and shorter limbs) compared to adults.

Q3: What are typical BSA values for infants?
A: Newborns typically have BSA of about 0.2-0.3 m², increasing with age and growth.

Q4: When should BSA be measured vs estimated?
A: For most clinical purposes, estimated BSA is sufficient. Direct measurement is rarely needed.

Q5: Are there limitations to this formula?
A: The formula may be less accurate for extremely premature infants or those with abnormal body proportions.