Flashcards in respiratory test Deck (17):
about 500 mL, the amount of air inspired during normal, relaxed breathing
about 3,100 mL, the additional air that can be forcibly inhaled after the inspiration of a normal tidal volume.
ispiratory reserve volume
about 1,200 mL, the additional air that can be forcibly exhaled after the expiration of a normal tidal volume.
expiratory reserve volume
about 1,200 mL, the volume of air still remaining in the lungs after the expiratory reserve vol. is exhaled.
about 6,000 mL, is the maximum amount of air that can fill the lungs (equal to TV + IRV + ERV + RV).
total lung capacity
about 4,800 mL, is the total amount of air that can be expired after fully inhaling ( is = TV + IRV + ERV = approximately 80 percent TLC). The value varies according to age and body size
about 3,600 mL, is the maximum amount of air that can be inspired (is = TV + IRV).
about 2,400 mL, is the amount of air remaining in the lungs after a normal expiration (is = RV + ERV).
functional reserve capacity
what is normal FEV1/FVC ratio?
what is obstructive lung disease?
Involves difficulty exhaling all the air from the lungs.
Because of damage to the lungs or narrowing of the airways inside the lungs, exhaled air comes out more slowly than normal.
At the end of a full exhalation, an abnormally high amount of air may still linger in the lungs
FEV1/FVC ratio < 70
what is restrictive lung disease?
Results from a condition causing stiffness in the lungs themselves.
In other cases, stiffness of the chest wall, weak muscles, or damaged nerves may cause the restriction in lung expansion
FEV1 & FVC equally reduced
FEV! > 80
examples of obstructive?
examples of restrictive?
what are abnormals of PaCO2 ?
high = resp. acidosis, hypercapnia
low = resp. alkolosis, hypocapnia
what are abnormals of HCO3
low = metabolic acidosis
high = metabolic alkalosis.
what is difference between O2CT v/s O2 sat
O2 content measures the amount of oxygen in the blood. Oxygen saturation measures how much of the hemoglobin in the red blood cells is carrying oxygen (O2).