RRT RRT Pulmonary Function Testing 2

Question 1

Which flow-volume loop pattern is characteristic of a fixed upper airway obstruction?

Accepted Answer

Flattening of both inspiratory and expiratory limbs

Answer

Normal scooped appearance on expiration

Answer

Flattening of the inspiratory limb only

Answer

Flattening of the expiratory limb only

Question 2

What does the term 'air trapping' refer to in pulmonary function testing?

Accepted Answer

Elevated RV and RV/TLC ratio indicating incomplete exhalation

Answer

Elevated TLC with normal RV

Answer

Reduced FVC with normal FEV1

Answer

Elevated DLCO

Question 3

Which pulmonary function test measurement best reflects small airway function?

Accepted Answer

FEF 25–75%

Answer

FEV1

Answer

FVC

Answer

Peak expiratory flow

Question 4

In body plethysmography, what does functional residual capacity (FRC) represent?

Accepted Answer

Volume of air in the lungs at the end of a normal expiration

Answer

Volume of air remaining after maximal expiration

Answer

Volume of air inhaled above tidal volume

Answer

Maximum volume during a forced inspiration

Question 5

A patient with pulmonary fibrosis would most likely show which spirometry result?

Accepted Answer

Reduced FVC, reduced FEV1, normal or elevated FEV1/FVC ratio

Answer

FEV1/FVC ratio <0.70 with normal FVC

Answer

Normal FVC with markedly reduced FEV1

Answer

Elevated TLC with air trapping

Question 6

What is the purpose of performing the nitrogen washout test?

Accepted Answer

Measure lung volumes including FRC when a body box is unavailable

Answer

Measure diffusing capacity

Answer

Assess bronchodilator responsiveness

Answer

Evaluate respiratory muscle strength