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A member asked:
Can oxygen levels be high or low because of a chesty cough?
A doctor has provided 1 answer
Normal: Usually cough is a reflex to clear the airway of mucus and shouldn't affect oxygen level. The oxygen level in a person's blood depends on hemoglobin (to carry oxygen) and interface between alveoli (air sacs) and blood vessels in the lungs. If air sacs in the lungs are damaged (emphysema from smoking) or their is fluid, mucus, pus in the alveoli, then oxygen can't pass, oxygen level goes down.
Answered 4/22/2013
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