Why would it be important to monitor the oxygen saturation of a person with severe asthma?

Problems with gas exchange can relate to anything that reduces the ability of oxygen to travel from outside air down into your alveoli or the process of oxygen transfer from the alveoli into the capillaries of the blood, such as in asthma or COPD. Decreased oxygen saturation may result from a lower concentration of hemoglobin, such as in iron deficiency anemia.

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