 ### Description

Functional Residual Capacity (FRC) is volume of air remaining in the lungs at the end-expiratory level.

predicted FRC in liters for males (Bates, 1971) =

= (0.13 * (height in inches)) - 5.16

predicted FRC in liters for females (Bates, 1971)=

= (0.119 * (height in inches)) - 4.85

predicted FRC in liters for males (Boren, 1966) =

= (0.081 * (height in inches)) - 2.94 =

= (0.032 * (height in cm)) - 2.94

FRC in liters in White males 15 - 91 years of age (Crapo, 1982) =

= (0.0472 * (height in cm)) + (0.009 * (age in years)) - 5.29

FRC in liters in White females 15 - 91 years of age (Crapo, 1982) =

= (0.0360 * (height in cm)) + (0.0031 * (age in years)) - 3.182

FRC in liters in Chinese males 20 - 66 years of age (Da Costa, 1971) =

= (0.0608 * (height in cm)) - (0.0258 * (weight in kilograms)) - 5.586

FRC in liters in Chinese females 20 - 66 years of age (Da Costa, 1971) =

= (0.0166 * (height in cm)) - (0.0174 * (age in years)) + 0.326

FRC in liters in adult males (Goldman, 1959) =

= (0.081 * (height in cm)) - (1.792 * (BSA in square meters)) - 7.11

FRC in liters in adult females (Goldman, 1959) =

= (0.053 * (height in cm)) - (0.017* (body weight in kilograms)) - 4.74

where:

• The coefficient for height in the original paper is 0.53, but this gives too high a value.

FRC in liters in adult males 20 - 65 years of age (Grimby, 1963) =

= (5.3 * (height in meters)) + (0.015* (age in years)) - (0.037 * (body weight in kilograms)) - 3.89

FRC in liters in adult females 18 - 72 (Grimby, 1963) =

= (5.13 * (height in meters)) - (0.028 * (weight in kilograms)) - 4.50

FRC in liters in White males 18 - 86 years of age (Roberts, 1991) =

= (7.502 * (height in meters)) + (0.009 * (age in years)) - (0.033 * (body weight in kilograms)) - 7.608

FRC in liters in White females 18 - 86 years of age (Roberts, 1991) =

= (5.867 * (height in meters)) + (0.009 * (age in years)) - (0.022 * (body weight in kilograms)) - 5.972