Lung Volumes And Capacities

Question 1

The volume of air in the lungs after a maximal inspiration; the sum of all lung volumes

Answer 1

Total lung capacity

TLC= RV + VC

Or

TLC= FRC + IC

100%

Question 2

The volume of gas remaining in the lungs at the end of a max expiration.

Answer 2

Residual volume (RV) 25%

Question 3

Total volume inspired and expired with each breath during quite breathing

Answer 3

Tidal volume TV 10%

Question 4

The max volume of air that can be exhaled after a normal tidal exhalation

Answer 4

Expiratory reserve volume ERV 15%

Question 5

The volume of air in the lungs after normal exhalation.

Answer 5

Functional residual capacity (FRC) = ERV + RV

40%

Question 6

The max volume of air that can be inspired after normal tidal volume inspiration

Answer 6

Inspiratory reserve volume (IRV) 50%

Question 7

The max volume of air that can be inspired after a normal tidal volume exhalation

Answer 7

Inspiratory capacity IC = IRV + RV 60%

Question 8

Volume of air expired in one minute

Answer 8

Minute volume ventilation VE = TV x RR

Question 9

The max volume of air exhaled in a specified period of time: usually the first, second, or third second of a forced vital capacity maneuver

Answer 9

Forced Expiratory volume (FEV)

Question 10

The volume change that occurs between max inspiration and max expiration

Answer 10

Vital capacity VC
VC= TV + IRV + ERV
75% total volume