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LUNG VOLUMES AND CAPACITIES, by:fariza - Coggle Diagram
LUNG VOLUMES AND CAPACITIES
Comparison
Lung Capacity
theoretical value determined from spirometer data
Values are calculated by combining two or more lung volumes
Values are large
Lung Volume
Values are directly measured by spirometer Except RV
Values are small
can be measured directly by using the spirometer
Lung Volume
Inspiratory Reserve Volume (IRV)
Volume that can be inspired beyond restful inhalation
The additional air that can be forcibly inhaled after the inspiration of a normal tidal volume
About 3100 mL
Expiratory Reserve Volume (ERV)
The additional air that can be forcibly exhaled after the expiration of a normal tidal volume
Volume that can be expired beyond restful exhalation
About 1200 mL
Tidal Volume (TV)
Volume of a single breath
The amount of air inspired and expired during a normal and relaxed breathing
About 500 mL
Residual Volume (RV)
The volume of air left in the lungs after a forced exhalation
About 1200 mL
Lung Capacity
Inspiratory Capacity (IC)
The maximum amount of air that can be inspired
IC = TV + IRV
About 3600 mL
Functional Residual Capacity (FRC)
The amount of air remaining in the lungs after a normal expiration
FRC = RV + ERV
About 2400 mL
Vital Capacity (VC)
The maximum volume which can be ventilated during a single breath
The total amount of air that can be expired after fully inhaling
About 4800 mL
VC = TV + IRV + ERV
= approximately 80% TLC
Total Lung Capacity (TLC)
About 6000 mL
TLC = TV + IRV + ERV + RV
The maximum amount of air that can fill the lungs
by:fariza