# A nurse is caring for a client with severe chronic obstructive pulmonary disease (COPD) who is receiving oxygen therapy at 2 L/min via nasal cannula. The client's oxygen saturation is 88%, and they are experiencing increased dyspnea. What is the most appropriate nursing action?

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## 문제

A nurse is caring for a client with severe chronic obstructive pulmonary disease (COPD) who is receiving oxygen therapy at 2 L/min via nasal cannula. The client's oxygen saturation is 88%, and they are experiencing increased dyspnea. What is the most appropriate nursing action?

## 보기

1. Increase oxygen flow rate to 6 L/min immediately and reassess
2. Encourage deep breathing exercises and coughing to improve ventilation
3. Position the client in Trendelenburg position to enhance perfusion
4. Notify the healthcare provider and monitor closely while maintaining current oxygen flow **✔ 정답**

**정답: 4**

## 해설

For COPD patients, high-flow oxygen can suppress hypoxic drive, leading to CO2 retention and respiratory depression. The priority is to notify the provider and monitor while maintaining current oxygen flow, as increasing oxygen (option 1) is dangerous, and other options (2, 3) are less urgent.

## 심화 해설

Understanding the Clinical Scenario

This client with severe COPD is on low-flow oxygen therapy but remains hypoxemic with an oxygen saturation of 88% and is experiencing increased dyspnea. The core of this question tests your ability to prioritize safe nursing actions when a stable, prescribed intervention is not achieving the desired outcome.

Why Not Increase the Oxygen Flow Rate?

While option 1 might seem intuitive, it is dangerous. In clients with severe COPD, the respiratory drive can shift from a normal response to elevated carbon dioxide (hypercapnia) to a reliance on hypoxic drive. Administering high-flow oxygen can suppress this drive, leading to hypoventilation, worsening hypercapnia, and respiratory failure. The prescribed flow rate of 2 L/min is a therapeutic order, and a nurse cannot independently increase it without a new prescription, especially when it poses a significant risk.

Why Not Deep Breathing Exercises or Trendelenburg Position?

Option 2, encouraging deep breathing and coughing, is a beneficial pulmonary hygiene measure for stable clients, but it is not the priority action during an acute episode of increased dyspnea and hypoxemia. The immediate need is to address the failing current therapy. Option 3, the Trendelenburg position, is contraindicated. This head-down position pushes abdominal contents against the diaphragm, further restricting lung expansion and worsening dyspnea in a client already struggling to breathe. The optimal position for ventilation is upright or semi-Fowler's.

The Pathophysiology of Hypoxia in COPD

The client's condition is driven by the underlying pathology of the ageing and diseased lung. As highlighted in the review on the hallmarks of the ageing lung, chronic lung diseases like COPD are characterized by reduced elasticity, persistent inflammation, and impaired repair capacity [1]. These structural changes lead to air trapping and ventilation-perfusion mismatch, which are the primary causes of hypoxemia.

Furthermore, hypoxia itself is not just a symptom; it is a critical pathophysiological driver that worsens the disease. Hypoxia exacerbates airway inflammation through hypoxia-inducible factor 1α (HIF-1α) signaling, which disrupts the epithelial barrier, reprograms immune responses, and accelerates airway remodeling, thereby worsening airflow limitation . This creates a vicious cycle where hypoxemia from COPD exacerbates the underlying inflammatory and remodeling processes, making ventilation even more difficult.

The Correct Nursing Action and Clinical Judgment

The most appropriate action is option 4: notify the healthcare provider and monitor closely while maintaining the current oxygen flow. This client’s condition is deteriorating despite the prescribed therapy. The nurse’s role is to recognize that the current treatment plan is failing and to advocate for the client by promptly communicating the assessment findings (SpO2 88%, increased dyspnea on 2 L/min of oxygen). While waiting for new orders, the nurse must remain with the client, continuously monitor respiratory status and level of consciousness, and ensure the current oxygen device remains in place and functioning. This action adheres to the scope of nursing practice, prioritizes patient safety by avoiding a dangerous independent increase in oxygen flow, and facilitates a timely escalation of care. The research on acute exacerbations of COPD underscores that when standard oxygen therapy and noninvasive ventilation are initiated, close monitoring and protocol-driven adjustments by the healthcare team are essential for preventing further decompensation .References (research sources)

- [1]Hallmarks of the ageing lung: 10 years later.Research articleBaker JR, Beaulieu D, Avci E, Huang E, Eickelberg O, Meiners S, Savai R, Lehmann M, Königshoff M. (2026) · DOI: 10.1183/13993003.01272-2025

## 임상 시나리오

Managing Hypoxemia in Severe COPDPrioritizing Safety with Oxygen Therapy
For a client with severe COPD on prescribed oxygen, an SpO2 of 88% with increased dyspnea indicates the current therapy is failing. The priority is to notify the healthcare provider while maintaining the current flow rate.

Do not independently increase the oxygen flow rate. In chronic CO2 retainers, high oxygen levels can suppress the hypoxic drive, leading to hypoventilation and respiratory failure. A nurse cannot change a prescribed rate without an order.

CautionAvoid placing the client in Trendelenburg position. This restricts diaphragmatic movement and worsens dyspnea. The optimal position is upright to maximize lung expansion.

## 핵심 개념

- **Hypoxic Drive** — A phenomenon in some severe COPD patients where the primary stimulus to breathe is low blood oxygen rather than high carbon dioxide.
- **Oxygen Therapy in COPD** — Administration of low-flow oxygen (e.g., 1-2 L/min) to maintain SpO2 between 88-92% to avoid suppressing the respiratory drive.
- **Scope of Practice** — The range of nursing activities a nurse is legally permitted to perform; changing a prescribed oxygen flow rate without an order is a violation.
- **Trendelenburg Position** — A position where the head is lower than the feet; contraindicated in respiratory distress due to increased pressure on the diaphragm.

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