Lung Volumes Flashcards
Label
anatomic dead space
volume of air occupying non-repiratory conducting airways
Expiratory Reserve Volume (EVR)
max volume of aire that can be exhaled after normal tidal exhale
approx 15% of total lung volume
Forced Expiratory Volume (FEV)
max volume of air exhaled in specified period of time- usually 1st, 2nd, and 3rd second of a forced vital capacity maneuver
Forced Vital Capacity (FVC)
volume of air expired during forced maximal expiration after forced max inspiration
Functional Residual Capacity (FRC)
volume of air in lungs after normal exhalation
FRC= ERV + RV
approx 40% of total lung volume
Inspiratory Capacity (IC)
max volume of air that can be inspires after normal tidal exhale
IC= TV + IRV
approx 60% of total lung volume
Inspirtatory Reserve Volume (IRV)
maximal volume of air that can be inspired after normal tidal inhale
approx 50% of total lung volume
Minute Volume Ventilation (VE)
volume of air expired in one min
VE = TV x respiratory rate
Peak Expiratory Flow (PEF)
max flow of air during beginning of forced expiratory maneuver
Residual Volume (RV)
volume of gas remaining in lungs at end of max exhale
approx 25% of total lung volume
Tidal Volume (TV)
total volume in/exhaled w/ each breath during quiet breathing
approx 10% total lung volume
Total Lung Capacity (TLC)
volume of air in lungs after max inhale- sum of all lung volumes
TLC= RV + VC or FRC + IC
Vital Capacity
volume change that occurs between max inhale and max exhale
VC= TV + IRV + ERV
approx 75% of total lung volume
