Spirometry

Question 1

Define tidal volume

Answer 1

The amount of air exhaled in a normal breath (when effort is not applied)

Question 2

Define inspiratory reserve volume

Answer 2

Volume of air breathed in (in addition to tidal volume) when force is applied

Question 3

Define expiratory reserve volume

Answer 3

Volume of air breathed out (in addition to tidal volume) when force is applied

Question 4

Define residual volume

Answer 4

Volume of air left in the lungs at the end of forced expiration

Question 5

What is vital capacity?

Answer 5

The greatest volume of air expired after taking the deepest possible breath

TV + IRV + ExRV

Question 6

Whats the difference between VC and FVC?

Answer 6

FVC is the greatest volume of air that is FORCIBLY exhaled after taking the deepest possible breath

Question 7

How does residual volume change in a patient with COPD?

Answer 7

Increases

Question 8

How does inspiratory reserve volume change in a patient with COPD?

Answer 8

Decreases

Question 9

How does tidal volume change in a patient with COPD?

Answer 9

No change

Question 10

How does expiratory volume change in a patient with COPD?

Answer 10

Increases

Question 11

Barrel chest is a common symptom of COPD. Why is this?

Answer 11

Hyperinflation of the chest due to increase in residual volume

Question 12

What is functional residual capacity?

Answer 12

Volume of air in the lungs at the end of passive expiration

ERV + RV

Question 13

How does total lung capacity change in a patient with COPD?

Answer 13

Increases

Question 14

How does the FVC change in a patient with COPD?

Answer 14

Stays around the same

Question 15

How does the FVC change in a patient with restrictive lung disease?

Answer 15

Decreases

Question 16

How does the FEV1:FVC ratio change in a patient with restrictive lung disease?

Answer 16

It doesn’t

Ratios stay the same, only FVC decreases as lungs cannot properly expand