What is the Body Surface Area (BSA) & it’s Calculator

BSA Calculator provided by calculators.tech

Body Surface Area (BSA)
Body Surface Area (BSA)

What is Body Surface Area (BSA) ? :

The total surface area of the body. Body Surface Area (BSA) is used in several measurements in medicine, including the calculation of medication dosages and the number of fluids to be administered IV.

Quite a few different formulas have been developed through the years to calculate the body surface area and they provide slightly different results. The most widely used formula today is that of Mosteller, printed in 1987 in The New England Journal of Medicine. Based on Mosteller’s”simplified calculation of body-surface region In terms” the body surface area (BSA) = the square root of product of the weight in 5 times that the height in cm divided by 3600.

The”ordinary” body surface area is usually taken to be 1.7 m2 but, in actual fact, the entire body surface area is dependent on more than just height and weight. For example:

  • Typical body surface area for mature men: 1.9 m2
  • Average body surface area for mature girls: 1.6 m2
  • Typical body surface area for kids (9 years): 1.07 m2
  • Average body surface area for children (10 years): 1.14 m2
  • Typical body surface area for kids (12-13 years): 1.33 m2

Body surface area can be used to get a determining other medical steps. As examples, renal function is measured by the glomerular filtration rate (GFR) that is calculated in respect to the body surface area. The cardiac index is a measure of cardiac output divided by the body surface area, providing a better approximation of the essential cardiac output. Chemotherapy and pharmacotherapies are often dosed according to the individual’s body surface area. Glucocorticoid dosing can also be expressed concerning body surface area for calculating maintenance doses or to compare high dose usage with maintenance requirement.