The Bsa formula is an important measurement used in medical science to assess the total surface area of the human body. It is often used in medical calculations, such as drug dosages, metabolic rate calculations, and the severity of burns.
Body Surface Area (BSA) Calculator
Here are the most commonly used formulas for calculating BSA:
1. Mosteller Formula
This is one of the simplest and most widely used formulas to calculate BSA:BSA(m2)=Height (cm)×Weight (kg)3600BSA (m²) = \sqrt{\frac{{\text{Height (cm)} \times \text{Weight (kg)}}}{3600}}BSA(m2)=3600Height (cm)×Weight (kg)
Where:
- Height is in centimeters (cm)
- Weight is in kilograms (kg)
2. Du Bois Formula
This formula is commonly used, especially in research and clinical settings:BSA(m2)=0.007184×Height (cm)0.725×Weight (kg)0.425BSA (m²) = 0.007184 \times \text{Height (cm)}^{0.725} \times \text{Weight (kg)}^{0.425}BSA(m2)=0.007184×Height (cm)0.725×Weight (kg)0.425
3. Haycock Formula
The Haycock formula is another commonly used formula to calculate BSA:BSA(m2)=0.024265×Height (cm)0.3964×Weight (kg)0.5378BSA (m²) = 0.024265 \times \text{Height (cm)}^{0.3964} \times \text{Weight (kg)}^{0.5378}BSA(m2)=0.024265×Height (cm)0.3964×Weight (kg)0.5378
4. Body Surface Area for Pediatrics (Boyd's Formula)
This formula is sometimes used for children:BSA(m2)=0.0003207×Height (cm)0.3×Weight (kg)0.3BSA (m²) = 0.0003207 \times \text{Height (cm)}^{0.3} \times \text{Weight (kg)}^{0.3}BSA(m2)=0.0003207×Height (cm)0.3×Weight (kg)0.3
How to Use the BSA Formula:
To calculate the Body Surface Area (BSA) using any of the above formulas, you need:
- Height (cm): The person's height in centimeters.
- Weight (kg): The person's weight in kilograms.
Once you have these two inputs, you can plug them into the chosen formula to calculate the BSA in square meters (m²).
Example:
For a person with:
- Height = 170 cm
- Weight = 70 kg
Using the Mosteller Formula:BSA=170×703600=119003600=3.3056≈1.818 m2BSA = \sqrt{\frac{{170 \times 70}}{3600}} = \sqrt{\frac{{11900}}{3600}} = \sqrt{3.3056} \approx 1.818 \, m²BSA=3600170×70=360011900=3.3056≈1.818m2
So, the Body Surface Area (BSA) would be approximately 1.818 m².
Applications of BSA:
- Drug Dosing: Many chemotherapy and other drugs are dosed based on BSA.
- Medical Imaging: Helps in assessing organ sizes and metabolic activity.
- Burn Assessment: BSA is used to assess the extent of burns in the body.
Each formula has its own nuances, but the Mosteller Formula is the easiest and commonly used for general purposes.