NBRC Pulmonary Function Testing 3

Question 1

The peak expiratory flow (PEF) is most effort-dependent and primarily reflects:

Accepted Answer

Large central airway caliber and effort

Answer

Small airway function

Answer

Alveolar gas mixing

Answer

Respiratory muscle endurance

Question 2

FEF25-75% (mid-expiratory flow rate) is considered a sensitive marker for:

Accepted Answer

Small airway disease (early COPD)

Answer

Upper airway obstruction

Answer

Respiratory muscle weakness

Answer

Pulmonary fibrosis

Question 3

An adult patient has a TLC of 120% predicted, an FRC of 140% predicted, and a reduced FEV1/FVC ratio. These findings are consistent with:

Accepted Answer

Severe emphysema with air trapping

Answer

Pulmonary fibrosis

Answer

Asthma without chronic hyperinflation

Answer

Normal lung function

Question 4

Which spirometric pattern is typically seen in a patient with severe scoliosis?

Accepted Answer

Restrictive pattern

Answer

Obstructive pattern

Answer

Mixed obstructive-restrictive pattern

Answer

Normal spirometry

Question 5

During methacholine challenge testing, a positive result (PC20) is defined as a ≥20% fall in FEV1 at a concentration of methacholine at or below:

Accepted Answer

8 mg/mL

Answer

0.5 mg/mL

Answer

4 mg/mL

Answer

16 mg/mL

Question 6

Respiratory muscle strength is assessed by measuring:

Accepted Answer

Maximum inspiratory pressure (MIP/PImax) and maximum expiratory pressure (MEP/PEmax)

Answer

FEV1 and FVC only

Answer

Oxygen saturation at peak exercise

Answer

FEF25-75% and PEFR