1. What is the Haycock Formula?

The Haycock formula is a widely used equation for estimating body surface area (BSA) in children. It provides a more accurate estimation than other formulas, especially for pediatric patients.

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 accounts for the non-linear relationship between body dimensions and surface area, providing more accurate results for children.

3. Importance of BSA Calculation

Details: BSA is crucial for determining proper medication dosages, chemotherapy regimens, fluid requirements, and for assessing metabolic mass in pediatric patients.

4. Using the Calculator

Tips: Enter weight in kilograms and height in centimeters. All values must be valid (weight > 0, height > 0). For best accuracy, measure height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: Why use Haycock formula instead of Du Bois?
A: The Haycock formula has been shown to be more accurate for children, especially those with abnormal body proportions or weights.

Q2: What are normal BSA values for children?
A: BSA varies significantly with age and growth. Newborns typically have BSA around 0.2 m², increasing to adult values (1.6-1.9 m²) by late adolescence.

Q3: When should BSA be calculated?
A: BSA should be calculated whenever precise dosing of medications is required, particularly for chemotherapy, critical care medications, or when adjusting for pediatric patients.

Q4: Are there limitations to this formula?
A: The formula may be less accurate for extremely obese or cachectic children. In such cases, consult with a pediatric specialist.

Q5: Can this be used for drug dosing?
A: Yes, this formula is commonly used for calculating chemotherapy and other medication doses in pediatric patients.