A 75-year-old man with a history of chronic obstructive pulmonary disease (COPD), hypertension, and a 20-pack-year smoking history, is transferred from the ED to a med–surg unit for continued monitoring after a COPD exacerbation. The provider orders 3 liters per minute of supplemental oxygen via nasal cannula. After 4 hours on the unit, the patient’s assigned nurse and training nurse notice changes in his condition.
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