Área de Superfície Corporal — Calculadora Online Grátis
Body Surface Area using Mosteller, DuBois and Haycock formulas with drug dosage reference
Body Surface Area (BSA) is used in clinical medicine to scale drug doses — particularly chemotherapy, cardiac medications, and pediatric dosing — because it correlates better with many physiological parameters than body weight alone. This calculator computes BSA using three established formulas (Mosteller, DuBois, and Haycock) and displays drug dosage reference information.
Frequently Asked Questions
Sobre Esta Calculadora
Body Surface Area estimation is a staple of clinical pharmacology. The concept was formalized by DuBois and DuBois in 1916, who observed that many physiological variables (cardiac output, renal function, metabolic rate) scale better with surface area than with body weight. Their original formula remains in use today alongside newer derivations.
The Mosteller formula (1987) gained widespread adoption in oncology because it's easy to compute mentally — just multiply height by weight, divide by 3600, and take the square root. The Haycock formula (1978) is particularly accurate for pediatric patients. No formula works perfectly across all body sizes and shapes, particularly in obesity where actual and estimated BSA can diverge significantly.
BSA-based drug dosing is most important for cytotoxic agents with narrow therapeutic windows, where under-dosing reduces efficacy and over-dosing causes serious toxicity. Your oncologist or pharmacist will always verify BSA calculations independently before prescribing.
A Área de Superfície Corporal (ASC) é usada para dosagem clínica.
Fórmula
Mosteller: BSA = √(Height(cm) × Weight(kg) / 3600)
Exemplo Resolvido
BSA calculation for a 170 cm, 70 kg adult
Entradas:
- Height: 170 cm
- Weight: 70 kg
Passo a Passo:
- Mosteller: BSA = √(170 × 70 / 3600) = √(11900/3600) = √3.306 = 1.818 m²
- DuBois: BSA = 0.007184 × 170^0.725 × 70^0.425 = 0.007184 × 58.77 × 6.83 = 1.806 m²
- Haycock: BSA = 0.024265 × 170^0.3964 × 70^0.5378 = 0.024265 × 7.08 × 10.71 = 1.841 m²
- Average across formulas: ~1.82 m²