Body surface area formulae: an alarming ambiguity.

Area of Science:

• Medical calculations
• Patient safety
• Pharmacology

Background:

• Body surface area (BSA) is critical in medical fields like oncology, transplantology, burn care, and toxicology.
• BSA significantly influences treatment plans and drug dosages.
• Various formulas exist to simplify BSA calculation, but their variability raises safety concerns.

Purpose of the Study:

• To analyze discrepancies among 25 different body surface area (BSA) formulas.
• To evaluate the clinical validity and patient safety implications of using various BSA calculation methods.

Main Methods:

• Comparative analysis of 25 distinct body surface area (BSA) formulas.
• Assessment of calculation variations across different patient physiques, including standard adults, abnormal physiques, and children.

Main Results:

• Discrepancies between commonly used BSA formulas can exceed 0.5 m² for standard adults.
• Previous studies validating BSA formulas were often limited to small, homogenous patient groups.
• The chosen BSA formula can significantly affect treatment outcomes and potentially patient mortality.

Conclusions:

• The selection of a body surface area (BSA) formula is a complex decision due to substantial calculation variations.
• Significant differences among BSA formulas pose risks, particularly for pediatric and patients with atypical body compositions.
• Standardized or validated approaches to BSA calculation are needed to ensure patient safety and treatment efficacy.