Spirometry

Question 1

What does a spirometer measure?

Answer 1

The volume of air breathed in and out

Question 2

Why is a lung function test used?

Answer 2

response to therapy, pre-surgical assessment, study of growth and development

Question 3

What kind of deflection is inspiration?

Answer 3

Upwards

Question 4

What kind of deflection is expiration?

Answer 4

Downwards

Question 5

How can inspiratory volume be calculates?

Answer 5

Tidal volume + inspiratory reserve volume

Question 6

What does forced flow-volume show?

Answer 6

How much air the subject can blow out and how fast. Response to treatment and progression of disease.

Question 7

Define the Peak expiratory flow

Answer 7

Maximum speed of airflow as the patient exhales

Question 8

What does an obstructive disease affect?

Answer 8

Reduces the speed that air can be breathed out (ratio less than 70%)

Question 9

What does a restrictive disease affect?

Answer 9

Forced Vital capacity is significantly reduced (ratio greater than 70%)

Question 10

What does a scalloping in expiration suggest?

Answer 10

Obstructive disease, as it takes longer to expel air from smaller airways. (COPD/Asthma)

Question 11

How would a flow-volume loop change in a restrictive disease?

Answer 11

Volume would be less (Thinner loop)