NAECB Spirometry 4

Question 1

Which reference equation set is currently recommended by ATS/ERS for interpreting spirometry in the U.S. adult population?

Accepted Answer

Global Lung Function Initiative (GLI) 2012 equations

Answer

The GLI 2012 multi-ethnic reference equations are now recommended by ATS/ERS as the preferred reference for spirometry interpretation across all ages.

Question 2

A pediatric patient (age 8) performs spirometry. Which additional consideration applies compared to adult testing?

Accepted Answer

Minimum exhalation time is typically 3 seconds, not 6

Answer

In children under 10, ATS/ERS guidelines accept a minimum exhalation time of 3 seconds rather than the 6 seconds required for adults.

Question 3

A variable extrathoracic (upper airway) obstruction would produce which flow-volume loop pattern?

Accepted Answer

Flattening of the inspiratory limb only

Answer

Variable extrathoracic obstruction (e.g., vocal cord dysfunction) causes flattening of the inspiratory limb because the lesion worsens during inspiration.

Question 4

Which of the following would be classified as a contraindication to performing spirometry?

Accepted Answer

Recent myocardial infarction within the past month

Answer

Recent myocardial infarction (within 1 month) is a relative contraindication due to the risk of increased intrathoracic pressure from forced exhalation.

Question 5

In asthma management, spirometry showing normalization of FEV1/FVC after bronchodilator administration indicates:

Accepted Answer

Reversible airflow limitation

Answer

Normalization of FEV1/FVC after bronchodilator confirms reversible airflow limitation, a defining feature of asthma.

NAECB Exam Practice Test

NAECB Exam Practice Test

NAECB Spirometry 4