PULMONARY FUNCTION TESTING (PFT) EXAM 2025 QUESTIONS AND ANSWERS

PULMONARY FUNCTION TESTING
(PFT) EXAM 2025 QUESTIONS AND
ANSWERS



Main goal of PFT is to determine if a lung disease is? (2) - ANS Restrictive or Obstruction



How many times does a test have to be repeated to be considered reliable? - ANS 3 times,
5% discrepancy



Vt is? - ANS Tidal Volume



Volume of gas inspired or expired during each respiratory cycle? - ANS Tidal Volume (Vt)



Calculation for Vt = - ANS IC - IRV



Average Tidal Volume value? - ANS 500 ml



IRV is? - ANS Inspiratory Reserve Volume



The maximum volume inspired from the end of a normal inspiration? - ANS Inspiratory
Reserve Volume (IRV)



Average Inspiratory Reserve Volume? - ANS 3100 ml


1 Copyright ©2025 THESTAR ALL RIGHTS RESERVED

, Calculation for IRV = - ANS IC - Vt



ERV is? - ANS Expiratory Reserve Volume


The largest volume of gas that can be expired from the resting end expiratory level? -
ANS Expiratory Reserve Volume (ERV)



Average Expiratory Reserve Volume? - ANS 1200 ml



Calculation for ERV = - ANS FRC - RV


Expiratory Reserve Volume makes up about what percentage of Vital Capacity (VC)? -
ANS 25%



Rv is? - ANS Residual Volume



The volume of gas remaining in the lungs at the end of a maximal expiration? - ANS Residual
Volume (RV)



Average Residual Volume? - ANS 1200 ml



Calculation for RV = - ANS FRC - ERV



IC is? - ANS Inspiratory Capacity


The largest volume of gas that can be inspired from resting expiratory level? -
ANS Inspiratory Capacity (IC)
2 Copyright ©2025 THESTAR ALL RIGHTS RESERVED