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Examen
TMC PFT Practice 2023 with complete solution questions and answers
Tidal Volume 
measured with a respirometer at bedside or spirometry 
Normal= 300-700mL 
 
 
Expiratory Reserve Volume 
measured through spirometry from a slow VC 
Normal=1000mL and 20-25% of the VC 
 
 
 
Residual Volume 
FRC-ERV 
Normal=1500mL 
 
 
Helium Dilution Test 
Close circuit system used to determine FRC. Helium is diluted until equilibrium is reached. This normally takes 7 minutes but in severally obstructed patients it can take 30 minutes 
 
 
Nitrogen Washout Test 
open circuit metho...