Structure and Function of Pulmonology Breathing Patterns

Tidal volume

Normal: 500mL

Amount of inhaled/exhaled air during 1 breath at rest

Inspiration residual volume

Normal: 3000-3300mL

Maximum amount of air inhaled past tidal volume

Expiration residual volume

Normal: 1000-1200mL

Maximum amount of air exhaled past tidal volume

Residual volume

Normal: 1200mL

Amount of air left after Maximum expiration

Vital capacity

Maximum expiration after max inhalation

Forced vital capacity

Maximum exhalation after forced inhalation

Forced expiratory volume in 1 second

1st measured second of FVC

FEV1/FVC ratio

Measures airway obstruction

Normal: greater than 75%

Less than 75% obstruction disease

Total lung capacity

Maximum amount of air in lungs after max inhalation

Inspiratory capacity

Maximum amount of inhalation after normal experiation

Functional reserve capactiy

Air remaining after NORMAL exhalation