Use of oxygen therapy in the patient who is hypercapnic may result in
a. oxygen toxicity.
b. absorption atelectasis.
c. carbon dioxide retention.
d. pneumothorax.
C
Deoxygenated hemoglobin carries more CO2 compared with oxygenated hemoglobin. Administration of oxygen increases the proportion of oxygenated hemoglobin, which causes increased release of CO2 at the lung level. Because of the risk of CO2 accumulation, all patients who are chronically hypercapnic require careful low-flow oxygen administration.
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