
In physiology and medicine, the body surface area (BSA) is the measured or calculated surface area of a human body. For many clinical purposes BSA is a better indicator of metabolic mass than body weight because it is less affected by abnormal adipose mass. Nevertheless, there have been several important critiques of the use of BSA in determining ...
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http://en.wikipedia.org/wiki/Body_surface_area
(BSA) Type: Term Definitions: 1. the area of the external surface of the body, expressed in square meters (m2); used to calculate metabolic, electrolyte, nutritional requirements, drug dosage, and expected pulmonary function measurements.
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http://www.medilexicon.com/medicaldictionary.php?t=6156

Body surface area: BSA. The total suface area of the human body. The BSA is used in many measurements in medicine, including the calculation of drug dosages and the amount of fluids to be administered IV. A number of different formulas have been developed over the years to calculate the BSA and they give slightly different results. The most commonl...
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http://www.medterms.com/script/main/art.asp?articlekey=39851
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