A nurse is caring for a client with moderate COPD who has been admitted with an acute exacerbation. The client's arterial blood gas results show pH 7.28, PaCO2 70 mmHg, PaO2 50 mmHg, and HCO3- 30 mEq/L. The client is receiving oxygen via nasal cannula at 2 L/min and appears anxious and restless. Which nursing intervention should the nurse implement first?

Positioning in high Fowler's position maximizes lung expansion and improves ventilation, addressing immediate respiratory compromise in COPD exacerbation. Other options may worsen hypoxia or delay essential assessment.

Analysis of Arterial Blood Gas (ABG) and Clinical Presentation
The ABG results reveal a partially compensated respiratory acidosis. The pH is 7.28 (acidotic), the PaCO2 is markedly elevated at 70 mmHg (indicating CO2 retention and respiratory acidosis), and the HCO3- is 30 mEq/L (elevated as the kidneys attempt to compensate by retaining bicarbonate). The PaO2 of 50 mmHg indicates significant hypoxemia. The client’s anxiety and restlessness are classic signs of both hypoxemia and air hunger, which are driven by the underlying pathophysiology of an acute exacerbation of COPD (AECOPD). During an AECOPD, heightened systemic inflammation and increased airway resistance lead to dynamic hyperinflation and impaired gas exchange, rapidly deteriorating functional capacity [1,2].

Prioritizing the Nursing Intervention
Using the nursing process and the ABC (Airway, Breathing, Circulation) priority-setting framework, the first action must directly address the client’s immediate breathing and oxygenation issue in the safest, least invasive manner. The correct initial intervention is to position the client in high Fowler's position.

Why High Fowler's Position is the First Priority
Positioning is a foundational, independent nursing intervention that immediately optimizes ventilation-perfusion (V/Q) matching without introducing any risk of harm. For a client with COPD, particularly during an acute exacerbation, placing them in an upright, high Fowler's position achieves several critical physiological goals:
- It allows the diaphragm to descend fully through gravity, reducing the work of breathing.
- It promotes maximal chest expansion and lung compliance.
- It helps reduce the sensation of dyspnea, which can subsequently decrease the anxiety stemming from air hunger. This intervention directly supports the physiological appropriateness of managing respiratory distress during the acute phase of hospitalization, where maintaining functional stability is a primary concern ^[1].

Why the Other Options are Incorrect or Lower Priority
- Increasing the oxygen flow rate to 6 L/min is a dangerous action for a client with chronic CO2 retention. The client’s respiratory drive may be dependent on their hypoxic drive. Administering high-flow oxygen can suppress this drive, leading to further hypoventilation, worsening CO2 narcosis, and a deteriorating level of consciousness. The current PaO2 of 50 mmHg, while low, is often acceptable in a COPD patient if managed cautiously, and the priority is to enhance ventilation first through positioning.
- Administering prescribed anxiolytic medication is premature and potentially harmful. The anxiety is a physiological symptom of hypoxemia and dyspnea. Administering a central nervous system depressant can blunt the respiratory drive and mask a declining clinical status without treating the root cause. The anxiety should be managed by first addressing the underlying breathing difficulty.
- Encouraging deep breathing exercises is a beneficial intervention for AECOPD, as graded exercise and breathing techniques are known to improve respiratory function and reduce systemic inflammation over the course of hospitalization ^[2]. However, in the acute moment of severe dyspnea, anxiety, and restlessness, a client is often unable to effectively participate in or coordinate deep breathing exercises. The immediate physical intervention of positioning must be implemented first to reduce the work of breathing and stabilize the client before other coached techniques can be introduced.