Spirometry Values + Definitions

Question 1

Define alveolar volume.

Answer 1

The amount of air reaching the alveoli each minute

Question 2

Define tidal volume and give values for both males and females

Answer 2

The amount of air inhaled or exhaled with each breath

500 mls males
500 mls females

Question 3

Define vital capacity and give approximate values for both males and females

(Definition + equation + values)

Answer 3

The maximum amount of air that you can move into or out of your lungs in a single respiratory cycle

The tidal volume plus expiratory and inspiratory reserve volumes

4. 8 L in males
5. 1L in females

Question 4

**Define residual volume and give values for both males and females

Answer 4

Amount of air left in lungs after maximum exhalation

1200mls in males
1100 mls in females

Question 5

**Define Expiratory Reserve Volume and give values for both males and females

Answer 5

The amount of air that you can voluntarily expel after you have completed a normal, quiet respiratory cycle

1000mls in males
700mls in females

Question 6

Define inspiratory reserve volume and give values for both males and females.

Answer 6

The amount of air that you can take in above the Tidal volume

3300mls in males
1900 mls in females

Question 7

**Define vital capacity and give values for both males and females
(Definition, equation, values)

Answer 7

The maximum amount of air that you can move into or out of your lungs in a single respiratory cycle

Expiratory reserve + tidal volume + inspiratory reserve

4800 mls
3100 mls

Question 8

Define total lung capacity and give values for both males and females.

Answer 8

Total volume of the lungs = vital capacity + residual volume

6000 mls in males
4500 mls in females