Pressure (Includes also partial pressure of a gas in a mixture of gases or in blood.)
L
Lung
W
Chest wall
RS
Respiratory system
Pl
Pleura
Ventilation
Gas Exchange–Blood Flow
II
Ventilation and Lung Mechanics
Static Lung Volumes
VC
Vital Capacity: The maximum volume of gas that can be exhaled after fully inflating the lungs.
FRC
Functional Residual Capacity: The volume of gas remaining in the lungs at the end of quiet expiration.
TLC
Total Lung Capacity: The volume of gas in the lungs after a maximum inspiration.
RV
Residual Volume: The volume of gas remaining in the lungs after a maximum exhalation.
IC
Inspiratory Capacity: The volume of gas that can be inhaled from resting end-expiration (FRC) to full inflation (TLC).
ERV
Expiratory Reserve Volume: The volume of gas that can be exhaled from resting end-expiration (FRC) to full exhalation (RV).
IRV
Inspiratory Reserve Volume: The volume of gas that can be inhaled from resting end-inspiration to full inflation (TLC).
Descriptors of Forced Breathing Maneuvers
Descriptors of Ventilation
Volume-Pressure Relationships
C
Compliance: General symbol for compliance, or the ratio of volume change of the structure per unit change in applied pressure across the structure.
C l
Lung Compliance: The volume change of the lung divided by the difference between alveolar pressure (Palv) and pleural pressure (Ppl), which is also known as the transpulmonary pressure (P l ).
C w
Chest Wall Compliance: The volume change of the chest wall divided by the difference between pleural pressure (Ppl) and body surface pressure (Pbs), which is also known as the transthoracic pressure (P w ).
Crs
Respiratory System Compliance: The volume change of the lung and chest wall divided by the difference between alveolar pressure (Palv) and body surface pressure (Pbs), or transpulmonary pressure (P l ) plus transthoracic pressure (P w ).
Cdyn
Dynamic Compliance: Value for compliance based on measurements made during uninterrupted breathing.
Cst
Static Compliance: Value for compliance based on measurements made during periods of no airflow.
C/V l
Specific Compliance: Value for compliance divided by the lung volume at which it was measured, usually functional residual capacity.
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