3 Ventilation Flashcards
What do we call the air inhaled during a normal breath?
Tidal Volume
~ 500ml
What do we call the air we can force out after a normal expiration?
The expiratory Reserve Volume (ERV)
~1100ml
Name the maximum volume of air we can inhale after a normal inspiration?
The Inspiratory Reserve Volume - IRV
~3000ml
What is the base level of air in the lungs that we cant expel?
Residual Volume - RV
~1200ml
What is the vital capacity - VC?
The variable level of air in the lungs. I,e, the total amount you can inhale/exhale apart from the residual volume.
~4600ml
How do we calculate the vital capacity?
Sum of:
- Inspiratory Reserve Volume
- Tidal Volume
- Expiratory Reserve Volume
How do we determine total lung capacity - TLC?
Total:
Vital Capacity & Residual Volume
~5800ml
What is the inspiratory Capacity - IC?
The total amount you can inspire in one forced breath.
Tidal Volume + Inspiratory Reserve Volume
~3500ml
What is the Functional Residual Capacity - FRC?
Resting level of air in lungs during normal breathing
I.e. Residual + Expiratory reserve volume
~2300ml
What is the FEV1?
Forced Expired Volume in a 1 second.
What is FEV1:FVC?
A ratio of the vital capacity that can be expired in 1 second in a forced breath.
Can be experssed as a %
What does ventilation broadly refer to?
The movement of air in and out of the body?
What ar ethe 2 types of ventilation?
Pulmonary (minute) - Total air movement in/out of lungs
Alveolar - Fresh air reaching the alveoli & available for gas exchange.
What is ventilation measured in?
L/min
What is hypo/hyperventilation?
Hypoventilation is low alveolar ventilation
Hyper is high alveolar ventilation
