CRE Pulmonary Function Testing & Interpretation

Question 1

What is the FEV1/FVC ratio threshold used by GOLD guidelines to diagnose airflow obstruction in adults?

Accepted Answer

Less than 0.70

Answer

Greater than 0.90

Answer

Greater than 0.80

Answer

Less than 0.60

Question 2

A patient's spirometry shows a reduced FEV1/FVC ratio with normal or elevated TLC. This pattern is most consistent with which type of lung disease?

Accepted Answer

Obstructive lung disease

Answer

Restrictive lung disease

Answer

Mixed obstructive-restrictive pattern

Answer

Normal lung function

Question 3

Which spirometry measurement represents the volume of air forcefully exhaled during the first second of a maximal forced expiratory maneuver?

Accepted Answer

FEV1

Answer

FVC

Answer

FEF25-75%

Answer

PEF

Question 4

The diffusing capacity of the lung for carbon monoxide (DLCO) is reduced in which of the following conditions?

Accepted Answer

Emphysema

Answer

Asthma

Answer

Obesity hypoventilation syndrome

Answer

Vocal cord dysfunction

Question 5

In restrictive lung disease, what change is observed in Total Lung Capacity (TLC)?

Accepted Answer

TLC is reduced below 80% predicted

Answer

TLC is elevated above 120% predicted

Answer

TLC remains within normal limits

Answer

TLC fluctuates based on effort

Question 6

According to ATS/ERS guidelines, a significant bronchodilator response requires an increase in FEV1 or FVC of at least what percentage AND absolute volume?

Accepted Answer

12% and 200 mL

Answer

5% and 100 mL

Answer

10% and 150 mL

Answer

15% and 300 mL

Question 7

An elevated residual volume to total lung capacity (RV/TLC) ratio is most indicative of which finding?

Accepted Answer

Air trapping due to obstructive disease

Answer

Pulmonary fibrosis

Answer

Respiratory muscle weakness

Answer

Pulmonary hypertension