PFT Exam Questions and 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
, PFT Exam Questions and Answers
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 dependent..repeast 3
FVCs with variation no greater than 5%
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