Lung Function Testing

Question 1

What is the resting end expiratory level known as?

Answer 1

Functional residual capacity

Question 2

What is the vital capacity?

Answer 2

The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.

Question 3

What happens to FEV1 in an obstructive disorder?

Answer 3

Reduced

Question 4

What happens to FEV1/FVC in an obstructive disorder?

Answer 4

Reduced

Question 5

What happens to FVC in a restrictive disorder?

Answer 5

Reduced

Question 6

What happens to FEV1/FVC in a restrictive disorder?

Answer 6

Normal

Question 7

What is indicated if the FEV1/FVC ratio is <70%?

Answer 7

An obstructive disorder

Question 8

What is seen on a flow-volume curve in an obstructive disorder?

Answer 8

Scalloping

Question 9

What is the nitrogen washout test used for?

Answer 9

Measuring anatomical deadspace

Question 10

What is the helium dilution test used for?

Answer 10

Measuring residual volume

Question 11

What is the Carbon Monoxide Transfer factor measurement used for?

Answer 11

Measuring the gas diffusing capacity of the lung

Question 12

What is measured when we measure how much air the subject can blow out?

Answer 12

Forced vital capacity (FVC)

Question 13

What is measured when we measure how fast the air is expelled?

Answer 13

FEV1 and FEV1/FVC ratio

Question 14

What is a normal FEC1/FVC ratio?

Answer 14

> 70 %

Question 15

What are the differences between obstructive and restrictive disease in terms of FVC?

Answer 15

FVC is markedly reduced in restrictive but not in obstructive

Question 16

What are the differences between obstructive and restrictive disease in terms of the FEV1/FVC ratio?

Answer 16

Restrictive - normal (because of no airway narrowing)

Obstructive - less than 70%