PFT EXAM QUESTIONS WITH VERIFIED
ANSWERS
Reasons to perform PFT - Correct Answer-1 Dx
obstructive or restrictive disease..2 evaluate causes
of dyspnea 3 Assess severity of disease 4 Evauate
effectiveness of tx 5 Estimate prognosis in lung
disease (staging)
Normal PFT values based on: - Correct Answer-
Gender, Age, *Height, (Body size) (Race)
PFT - Correct Answer-indentifies devieations from
normal predicted values
Normal PFT - Correct Answer-80-120% of predicted
Mild PFT - Correct Answer-65-80% of predicted
Moderate PFT - Correct Answer-50-64% of
predicted
Severe PFT - Correct Answer-< 50 % of predicted
, Tidal Volume (VT) - Correct Answer-volume of gas
(air) that moves in and out of lungs in one breath
Inspiratory Reserve Volume (IRV) - Correct Answer-
volume of gas that can be forcefully inspired after a
normal VT inhalation
Expiratory Reserve Volume (ERV) - Correct Answer-
volume of gas that can be forcefully exhaled after a
normal VT exhalation
Residual Volume (RV) - Correct Answer-volume of
air remaining in the lungs after a forced exhalation
Lung capacities - Correct Answer-combinations of
lung volumes
Vital Capacity (VC) - Correct Answer-the volume of
air that can be exhaled after a maximum
inspiration.
VC = - Correct Answer-IRV+VT+ERV
Forced Vital Capacity (FVC) - Correct Answer-
exhalation is done as rapidly as possible..Evaluates
both large and small airways..Effort
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