Expiratory Reserve Volume (ERV)
The maximum volume of air exhaled from end expiration.
Inspiratory Reserve Volume (IRV)
Maximum volume of air inhaled from end inspiration
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Residual Volume (RV)
The volume of air remaining in lungs after maximum exhalation.
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NR 601 PFT Quiz
Expiratory Reserve Volume (ERV) - Answer The maximum volume of air exhaled from
end expiration.
Inspiratory Reserve Volume (IRV) - Answer Maximum volume of air inhaled from end
inspiration
Residual Volume (RV) - Answer The volume of air remaining in lungs after maximum
exhalation.
Tidal Volume (VT or TV) - Answer Volume of air inhaled or exhaled during each
respiratory cycle
Functional Residual capacity (FRC) - Answer Volume of air in the lungs at rest end
expiration
Inspiratory Capacity (IC) - Answer Maximum volume of air that can be inhaled from the
resting expiratory level
Total Lung Capacity (TLC) - Answer Volume of air in the lungs at maximum inflation
What is the formula for Total Lung Capacity - Answer RV (residual vol.) + VC (volume
capacity)
Vital Capacity (VC) - Answer The maximum volume of air exhaled on complete
exhaustion after full inspiration.
Forced Vital Capacity (FVC) - Answer Total of air expelled as rapidly as possible
(measurement over time)
1st second Forced Expiratory Volume (FEV1) - Answer The volume of air expelled in
the first second of FVC (most reproducible and reliable)
FEV1/FVC ratio - Answer Percentage of maximum inspiration expired in 1 second
How do you determine reversibility - Answer Performing a pre and post bronchodilator
spirometry test is conducted
What is a significant response in adults considered - Answer Greater than or equal to
12% improvement in FEV1(or FVC)
significant response = indicative of asthma
What does spirometry measure - Answer volume against time
GOLD1 (Mild) - Answer FEV1 > 80% predicted
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