Definitions

Question 1

The volume of air moved into or out of the lungs during quiet breathing

Answer 1

tidal volume

Question 2

• the volume of air remaining in the lungs after maximal expiration.
• functions to maintain alveolar patency, especially during end expiration

Answer 2

Residual Volume

Question 3

The volume of air that can be futher exhaled at the end of normal expiration

Answer 3

Expiratory reserve volume (ERV)

Question 4

The volume of air that can be further inhaled at the end of normal inspiration

Answer 4

Inspiratory reserve volume

Question 5

maximum volume of air that can be exhaled following maximum inspiration

Answer 5

Vital capacity

Question 6

the volume in the lungs at maximum inspiration (VC+ RV)

Answer 6

Total lung capacity

Question 7

• volume of gas in the lungs at normal tidal volume end expiration (ERV + RV). this is the air in which gas exchange takes place
• increase seen in disorders with hyperinflation (due to loss of elastic recoil, PEEP)
• decrease seen in restrictive lung disease

Answer 7

Functional residual capacity (FRC)

Question 8

the volume of air that has been exhaled at the end of the first second of forced expiration

Answer 8

FEV1: Forced expiratory volume in 1 second

Question 9

measurement of the volume of air that can be expelled from a maximally inflated lung with patient breathing as hard and as fast as possible

Answer 9

Forced Vital Capacity