Oxygen Therapy: Indications And Device Selection Practice Test

A 70-year-old client with COPD is in a long-term care facility and becomes more short of breath during ambulation. Current symptoms include mild confusion and increased cough. Vital signs: heart rate 110/min, respiratory rate 32/min, blood pressure 150/88 mm Hg, oxygen saturation 82% on room air; arterial blood gas obtained at the facility: pH 7.31, PaCO2 62 mm Hg, PaO2 48 mm Hg. What is the best initial action regarding oxygen therapy?

A 59-year-old client with COPD is in an acute care emergency department with severe dyspnea and audible wheezing. Vital signs: heart rate 124/min, respiratory rate 36/min, blood pressure 164/92 mm Hg, oxygen saturation 78% on room air; arterial blood gas: pH 7.28, PaCO2 70 mm Hg, PaO2 44 mm Hg. Which oxygen delivery device is most appropriate as an immediate, short-term intervention while preparing for additional respiratory support?