• T R Nagel and J E Schunk.
• Emergency Department, Southwestern Texas Methodist Hospital, San Antonio, USA.
• Pediatr Emerg Care. 1997 Aug 1; 13 (4): 254-5.

ObjectiveEstimation of the surface area involved is vital to evaluation and treatment of burns. Common teaching suggests the palm approximates 1% of the total body surface area (TBSA). However, early century literature suggests the palmar surface of the entire hand approximates 1% of the TBSA. We sought to determine whether the palm or the entire palmar surface of the hand approximates 1% TBSA in children.DesignA prospective, convenience sample.Materials And MethodsUsing height, weight, and standard nomograms, body surface area was determined. A photocopy of the hand was used to determine the surface area of the palm and the entire palmar surface of the hand.ResultsIn 91 children, the mean percent of the TBSA represented by the entire palmar surface was 0.94% (95% confidence interval (C.I.) 0.93-0.97), and the mean percent of the TBSA represented by the palm was 0.52% (95% C.I. 0.51-0.53).ConclusionThe entire palmar surface of a child's hand more closely approximates 1% TBSA, while the palm approximate 0.5% TBSA.

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