RRT RRT Pulmonary Function Testing

Question 1

Which spirometric pattern is characterized by reduced FVC with a normal or elevated FEV1/FVC ratio?

Accepted Answer

Restrictive pattern

Answer

Obstructive pattern

Answer

Mixed pattern

Answer

Normal pattern

Question 2

What FEV1/FVC ratio defines airflow obstruction in spirometry?

Accepted Answer

Less than 0.70

Answer

Less than 0.80

Answer

Less than 0.60

Answer

Less than 0.85

Question 3

Diffusing capacity for carbon monoxide (DLCO) is reduced in which condition?

Accepted Answer

Emphysema

Answer

Asthma

Answer

Obesity

Answer

Respiratory muscle weakness

Question 4

What is residual volume (RV) and how is it measured?

Accepted Answer

Volume remaining after maximal expiration; measured by body plethysmography or gas dilution

Answer

Volume after a normal expiration; measured by spirometry

Answer

Volume inhaled during a normal breath; measured by spirometry

Answer

Volume exhaled in the first second; measured by spirometry

Question 5

A patient with asthma shows significant improvement in FEV1 after bronchodilator administration. What percentage increase is considered significant?

Accepted Answer

12% and 200 mL

Answer

5% and 100 mL

Answer

20% and 300 mL

Answer

8% and 150 mL

Question 6

Total lung capacity (TLC) is defined as:

Accepted Answer

Total volume of air in the lungs at maximal inhalation

Answer

Volume of air inhaled during a normal breath

Answer

Volume of air remaining after normal exhalation

Answer

Maximum volume exhaled from full inhalation