体表面积计算器

What is Body Surface Area?

Body Surface Area (BSA) is the measured or calculated surface area of the human body. It is widely used in medicine for drug dosing, cardiac output assessment, burn evaluation, and other clinical applications. BSA is often a better indicator than body weight for many physiological functions.

Calculation Formulas

• Du Bois: BSA (m²) = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425
• Mosteller: BSA (m²) = √(Height(cm) × Weight(kg) / 3600)
• Haycock: BSA (m²) = 0.024265 × Height(cm)^0.3964 × Weight(kg)^0.5378
• Gehan & George: BSA (m²) = 0.0235 × Height(cm)^0.42246 × Weight(kg)^0.51456
• Boyd: BSA (m²) = 0.0003207 × Height(cm)^0.3 × Weight(g)^(0.7285 - 0.0188 × log(Weight(g)))
• Fujimoto: BSA (m²) = 0.008883 × Height(cm)^0.663 × Weight(kg)^0.444
• Takahira: BSA (m²) = 0.007241 × Height(cm)^0.725 × Weight(kg)^0.425
• Schlich: Males: 0.000579479 × Height(cm)^1.24 × Weight(kg)^0.38; Females: 0.000975482 × Height(cm)^1.08 × Weight(kg)^0.46

Clinical Uses of BSA

• Drug dosage calculation, especially for chemotherapy and other critical medications
• Cardiac function assessment (cardiac index = cardiac output / BSA)
• Burn area assessment and fluid replacement therapy
• Basal metabolic rate calculations
• Fluid requirements and renal clearance calculations

Accuracy of BSA Calculations

Different formulas may be more accurate for specific populations. For pediatric patients, the Haycock or Mosteller formulas are often preferred. For Asian populations, the Fujimoto formula may provide better results. The average of multiple formulas is commonly used in clinical practice.

Medical Disclaimer

This calculator is for informational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for medical decisions, especially regarding medication dosing.