Mechanics Of Ventilation Flashcards
How do you calculate Volume of air breathed per minute
Volume of each breath (tidal volume) x Frequency (breaths per min)
What cells line alveoli
Simple squamous
What is the anatomic dead space
Area where no gas is being exchanged
What is alveolar dead space
When there is no/not enough blood supply for gas exchange
How to calculate tidal volume
Physiological dead space + alveolar component
When is physiological dead space air exchanged
Panting - as to not lead to excess CO2 removal
What is total lung capacity
Maximum air lungs can hold
What is functional residual reserve
Volume of air that remains in the lungs after normal respiration
What is residual volume
Minimum volume of air in the lungs after maximum expiration (after you pushed out functional residual volume)
What is the vital capacity
Max volume of air that can be moved in and out
How does the diaphragm move for inspiration
Diaphragm moves caudallly to increase thoracic cavity volume
External intercostal muscles contract to move ribs cranially and laterally
How does air move with pressure
If Intra-alveolar pressure is less than atmospheric pressure, air will flow in
(High P to Low P)
What is intrapleural pressure
Pressure outside the lungs but within thoracic cavity
(Between visceral and parietal pleura)
What is transpulmonary pressure
Difference between intra-alveolar and intrapleural pressure
How is forced expiration different from passive
Contraction of caudal muscles needed to force air out
