Pulmonary Function Tests. J.B. Handler, M.D. Physician Assistant Program University of New England. ARDS- adult respiratory distress syndrome DL CO - diffusion capacity for carbon monoxide Ht- height Wt- weight SOB- short of breath Pred- predicted Meas- measured
Pulmonary Function Tests
J.B. Handler, M.D.
Physician Assistant Program
University of New England
ARDS- adult respiratory distress syndrome
DLCO- diffusion capacity for carbon monoxide
SOB- short of breath
PFT- pulmonary function test
ABG- arterial blood gas
Tidal Volume (TV): amount of air inhaled and exhaled at rest; normal= 500-750 ml.
Inspiratory Capacity (IC): beginning of normal inhalation to maximum inspiration.
Inpiratory Reserve Volume (IRV): Volume measured from “top” of the TV (point of normal exhalation) to maximum inspiration.
Expiratory Reserve Volume (ERV): Volume measured from the “bottom” of the TV (point of normal inhalation) to maximum expiration.
Residual Volume (RV): The amount of air left in the lungs following full exhalation to the ERV..
Functional Residual Capacity (FRC) = ERV + RV: amount of gas remaining in the lungs at the end of the tidal volume.
Vital Capacity (VC): volume of air measured from full inhalation to maximum exhalation
Total Lung Capacity (TLC): summation of the RV + vital capacity.
22 y.o male with cough, SOB, and wheezing.