Lung function Flashcards
Define tidal volumes
is the amount of air breathed in or out during a respiratory cycle
Define inspiratory reserve volume
is the amount of air that can still be inspired after inhaling the tidal volume
define expiratory reserve volume
is the amount of air that can still be expired after exhaling the tidal volume
define residual volume
is the amount of air remaining in the lungs after the most forceful expiration
define inspiratory capacity
is the sum of the tidal and inspiratory reserve volumes
define vital capacity
the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath
define functional residual capacity
is the sum of the expiratory reserve volume and the residual volume
define total lung capacity
is the entire gas volume of the maximally spontaneously inflated pulmonary parenchyma and airways in the thorax
Define respiratory rate
is the rate at which breathing occurs. This is usually measured in breaths per minute
define minute volume
is the total volume of gas moved in or out of the airways and alveoli in 1 minute
Define dead space
is the volume of is that is inhaled that does not take part in the gas exchange, because it either remains in the conducting airways or reaches alveoli that are not perfusion or poorly perfused
Define alveolar ventilation
is the volume of air entering and leaving the alveoli per minute
Define the conditions under which ventilation/perfusion mismatch occur
A V/Q mismatch happens when part of your lung receives oxygen without blood flow or blood flow without oxygen. This happens if you have an obstructed airway, such as when you’re choking, or if you have an obstructed blood vessel, such as a blood clot in your lung
