Measuring Respiratory Volumes and Capacities Flashcards
1
Q
Tidal Volume (TV)
A
- volume of air inhaled and exhaled during any single inspiratory-expiratory cycle
2
Q
Minute Volume (MV)
A
the liters of air exchanged per minute during quiet breathing
- ~12 TV events per minute
- ~6-9 L per minute
3
Q
ACTIVE breathing
A
INSPIRATION
muscle contraction
4
Q
PASSIVE breathing
A
expiration
no contraction
5
Q
Inspiratory Reserve Volume (IRV)
A
volume of air which can be inhaled beyond that inhaled in a TV cycle
6
Q
Expiratory Reserve Volume (ERV)
A
volume of air that can be exhaled following a quiet passive exhalation
extra air to exhale
7
Q
Residual Volume (RV)
A
volume of air that remains in lungs and airways even after maximum exhalation
cannot be voluntarily expelled
8
Q
Total Lung Capacity (TLC)
A
- volume of air that the lungs are capable of holding at height of a maximun inhalation
- TLC=RV+IRV+ERV+TV
9
Q
Vital Capacity (VC)
A
- volume of air that can be exhaled after as deep an inhalation as possible
- represents what can be used
- amount of air we use for speech
- VC=IRV+TV+ERV
10
Q
Inspiratory Capacity (IC)
A
- maximum volume of air that can be inhaled from resting expiratory level
- IC=TV+IRV
11
Q
Functional Residual Capacity (FRC)
A
- volume of air in lungs and airway at resting expiratory level
- volume of air remaining in lungs and airways at end-expiratory level
- FRC=RV+ERV
12
Q
A
