lung volumes Flashcards
Healthy adults at rest usually breathe about how may times a minute?
12
Normally each inhalation and exhalation moves about how much air into and out of the lungs?
500 mL of air
What is defined as the volume of one breath?
Tidal volume
The total volume of air inhaled and exhaled each minute is called….
Minute ventilation (MV)
Minute ventilation calculation
MV = X breaths/min x 500 mL/breath
What is the MV if your pt is breathing 12 times per min
6000 mL/min
About what percentage of the tidal volume actually reaches the respiratory bronchioles and alveolar sacs and participates in gas exchange?
70% (350mL)
What happens to the remaining 30% not used in gas exchange?
It remains in the conducting airways
(the nose, pharynx, larynx, trachea, bronchi,
bronchioles, and terminal bronchioles)
-Known as anatomical dead space
What is the instrument used to measure respiratory rate and the amount of inhaled and exhaled when breathing.
Spirometer
What is normal pattern of quiet breathing called
Eupnea
Costal breathing (shallow) is defined as…
an upward and outward movement of the chest
Diaphragmatic breathing (deep) is defined as….
outward movement of the abdomen
