A 68-year-old patient with chronic obstructive pulmonary disease (COPD) is admitted to the medical unit with acute exacerbation. The patient presents with increased dyspnea, productive cough with purulent sputum, and confusion. Vital signs: BP 140/90 mmHg, HR 110 bpm, RR 28/min, O2 sat 88% on room air, temperature 101.2°F (38.4°C). ABG results show pH 7.32, PaCO2 58 mmHg, PaO2 55 mmHg, HCO3- 28 mEq/L. What is the nurse's priority action?

In COPD exacerbation with hypoxemia (O2 sat 88%) and respiratory acidosis, priority is low-flow oxygen (2-3 L/min) to correct hypoxemia while avoiding suppression of hypoxic drive. Other interventions (bronchodilators, sputum culture, family education) are important but secondary to oxygenation.

Understanding the Clinical Scenario
This patient is experiencing an acute exacerbation of COPD (AECOPD) with signs of acute respiratory failure. The ABG results reveal a pH of 7.32 (acidosis), PaCO₂ of 58 mmHg (elevated), and PaO₂ of 55 mmHg (hypoxemia). The HCO₃⁻ of 28 mEq/L indicates metabolic compensation for chronic CO₂ retention, but the low pH confirms an acute decompensation on top of a chronic condition. The patient's confusion is a critical neurological manifestation of severe hypoxemia and requires immediate intervention.

Priority Action Analysis
The NCLEX-RN exam uses the ABC (Airway, Breathing, Circulation) framework to establish priorities. In this case, the immediate threat to life is profound hypoxemia (PaO₂ 55 mmHg, O₂ sat 88%). While bronchodilators are essential for treating the underlying bronchoconstriction, their effect is not immediate. The physiological priority is to correct the oxygen deficit to prevent cardiac arrhythmia, further neurological deterioration, and respiratory arrest.

Applying supplemental oxygen via nasal cannula at 2-3 L/min is the correct initial action because it directly addresses the life-threatening hypoxemia. In COPD patients, the goal is to titrate oxygen to achieve an SpO₂ of 88-92% to avoid suppressing the hypoxic drive, but the immediate need to raise the dangerously low PaO₂ takes precedence. The evidence highlights that delays in recognizing and acting upon worsening symptoms in COPD are major drivers of hospitalization and mortality ^[1]. This patient's confusion signifies a delay in care-seeking has already occurred, making the nurse's rapid response critical. Differentiating this acute event from day-to-day symptom variation is a known challenge, but the presence of confusion and acute ABG changes confirms an exacerbation requiring urgent systemic intervention ^[2].

Why Other Options Are Not the Priority
Administering a bronchodilator (Option 1) addresses the ventilation component but does not immediately resolve the critical tissue hypoxia. Obtaining a sputum specimen (Option 3) is important for guiding antibiotic therapy but is a secondary intervention that does not address a life-threatening condition. Explaining the condition to the family (Option 4) is a psychosocial need that, while important, is deferred until physiological stability is achieved. The nurse's priority is to correct the hypoxemia, which is the direct cause of the patient's acute confusion and the most immediate threat to survival.