Spirometry

Question 1

Define expiratory reserve volume (ERV)

Answer 1

Amount of air in excess tidal expiration that’s exhaled w/ max effort

Question 2

Define inspiratory reserve volume (IRV)

Answer 2

Amount of air in excess tidal inspiration that’s inhaled w/ max effort

Question 3

What is residual volume (RV)?

Answer 3

Amount of air left in lungs after maximum expiration

Question 4

What is the purpose of residual volume?

Answer 4

To keep the alveoli inflated between breaths (it mixed w/ fresh air on next inspiration)

Question 5

Define vital capacity (VC)

Answer 5

Amount of air that can be exhaled w/ max effort after max inspiration (ERV+TV+IRV)

Question 6

Define functional residual capacity (FRC)

Answer 6

Amount of air left in lungs after a normal tidal expiration (ERV+RV)

Question 7

Define inspiration capacity (IC)

Answer 7

MAX amount of air inhaled after a normal tidal expiration (TV+IRV)

Question 8

Define total lung capacity (TLC)

Answer 8

MAX amount of air lungs can contain (VC+RV)

Question 9

Define tidal volume (TV)

Answer 9

MAX amount of air inhaled/ exhaled in one (normal) breath

Question 10

What is the tidal volume?

Answer 10

500mL

Question 11

What measures can be used for airways obstruction?

Answer 11

FEV1 < 80%

FEV1/FVC ratio < 0.7

Question 12

What measures can be used for airways restriction?

Answer 12

FVC < 80%

FEV1/FVC ratio< 0.7

Question 13

What is airways obstruction?

Answer 13

FEV1 is low

FVC is eventually reached

Question 14

What is airways restriction?

Answer 14

FEV1 is low

FVC can’t be reached

Question 15

Examples of conditions that cause airways obstruction?

Answer 15

Asthma

COPD

Question 16

Exampled of conditions that cause airways restriction?

Answer 16

Pulmonary fibrosis

Obesity