# A nurse is caring for a 68-year-old patient with chronic obstructive pulmonary disease (COPD) who is receiving oxygen therapy at 2 L/min via nasal cannula. The patient's oxygen saturation has dropped from 92% to 88%, and they are experiencing increased dyspnea. What is the nurse's priority action?

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## 문제

A nurse is caring for a 68-year-old patient with chronic obstructive pulmonary disease (COPD) who is receiving oxygen therapy at 2 L/min via nasal cannula. The patient's oxygen saturation has dropped from 92% to 88%, and they are experiencing increased dyspnea. What is the nurse's priority action?

## 보기

1. Increase the oxygen flow rate to 6 L/min immediately
2. Assess the patient's respiratory rate, breath sounds, and level of consciousness **✔ 정답**
3. Encourage the patient to use pursed-lip breathing techniques
4. Notify the healthcare provider about the oxygen saturation change

**정답: 2**

## 해설

Assessing respiratory status is the priority to identify the cause of deterioration before intervening in a COPD patient. Other actions depend on assessment findings.

## 심화 해설

Understanding the Priority Setting Framework

In a clinical situation where a patient with chronic obstructive pulmonary disease (COPD) exhibits a drop in oxygen saturation and increased dyspnea, the nurse must apply the nursing process. The first step is always assessment. Before implementing any intervention, the nurse needs to gather more data to determine the underlying cause of the change. While it may be tempting to immediately increase oxygen or notify the provider, a high-flow rate of oxygen can be dangerous for a subset of COPD patients who are chronic carbon dioxide (CO2) retainers, as it may suppress their hypoxic respiratory drive. Therefore, a rapid, focused assessment is the safest and most critical initial action.

Analysis of the Correct Answer (Option 2)

The priority action is to assess the patient's respiratory rate, breath sounds, and level of consciousness. This step directly aligns with the primary nursing responsibility in a crisis-driven situation, as highlighted by the need for comprehensive assessment in emergency care settings [1]. By evaluating these specific parameters, the nurse gathers essential data to identify whether the deterioration is due to bronchospasm, secretion plugging, fatigue, or progression of the underlying disease. A change in level of consciousness is particularly critical as it may signal hypercapnia (elevated CO2 levels) or severe hypoxemia, which would drastically alter the immediate management plan. This assessment provides the clinical judgment foundation needed to safely decide the next step.

Why the Other Options Are Incorrect

- Option 1: Increase the oxygen flow rate to 6 L/min immediately. This is a high-risk intervention without prior assessment. In COPD patients, particularly those with chronic CO2 retention, administering high-flow oxygen can depress the respiratory drive, leading to hypoventilation, worsening hypercapnia, and potential respiratory failure. The nurse must first assess the patient to determine if a cautious titration is appropriate or if other interventions are needed.

- Option 3: Encourage the patient to use pursed-lip breathing techniques. While pursed-lip breathing is an excellent technique to reduce dynamic hyperinflation and relieve dyspnea in stable COPD, it is not the priority when a patient is acutely deteriorating. The physiological mechanism of the drop in saturation must be assessed first to rule out life-threatening causes that require immediate medical intervention.

- Option 4: Notify the healthcare provider about the oxygen saturation change. Notification is a necessary step, but it should occur after the nurse has completed a focused assessment. The provider will need the specific assessment data (vital signs, lung sounds, mental status) to make an informed clinical decision and provide appropriate orders. Calling without this data delays effective care.

Deep Dive into the Pathophysiology and Clinical Application

The drop in oxygen saturation from 92% to 88% indicates a significant decline in oxygenation. In the context of the reactive, crisis-driven nature of emergency care for COPD patients, the nurse’s experiential assessment is the cornerstone of preventing further decompensation [1]. The assessment of breath sounds can quickly differentiate between a wheeze (suggesting bronchoconstriction), crackles (suggesting fluid overload or pneumonia), or diminished sounds (suggesting severe obstruction or pneumothorax). Simultaneously, checking the respiratory rate and pattern helps quantify the work of breathing, while a decline in level of consciousness using a simple scale alerts the nurse to the most dangerous complication: CO2 narcosis. This structured, rapid clinical assessment forms the basis of the nursing contribution to improved patient outcomes in the emergency management of COPD [1].References (research sources)

- [1]Beyond Triage: The Critical Role of Emergency Nurses in COPD Assessment and Management-Insights from Patients and Staff.Research articleMoloney C, Beccaria G, Mullens AB. (2026) · DOI: 10.3390/nursrep16040136

## 임상 시나리오

COPD Patient with DesaturationPrioritizing Assessment Before Intervention
For a COPD patient on 2 L/min oxygen whose SpO2 drops to 88%, the nursing process mandates assessment as the first step. Immediately check respiratory rate, breath sounds, and level of consciousness to identify the cause of deterioration.

A change in level of consciousness is a critical finding that may signal hypercapnia or severe hypoxemia. This data guides the next intervention, such as adjusting oxygen or initiating non-invasive ventilation.

CautionNever increase oxygen to high flow rates without assessment in COPD patients, as it can suppress the hypoxic drive in chronic CO2 retainers, leading to respiratory failure.

## 핵심 개념

- **Chronic Obstructive Pulmonary Disease** — Chronic obstructive pulmonary disease. It refers to a group of diseases (chronic bronchitis, emphysema) where airflow is limited due to chronic inflammation of the airways and lung parenchyma.
- **Hypoxic Drive** — Hypoxic respiratory drive. In patients with chronic hypercapnia, the primary stimulus for breathing becomes low oxygen (O2) levels rather than normal carbon dioxide (CO2) levels. Administration of high-concentration oxygen may suppress respiration.
- **Hypercapnia** — Hypercapnia. A condition in which the partial pressure of carbon dioxide (CO2) in the blood is abnormally high. It commonly occurs in patients with COPD.
- **Pursed-lip Breathing** — Pursed-lip breathing. A breathing technique where you exhale slowly through pursed lips, maintaining airway pressure to prevent airway collapse and prolonging exhalation time to improve breathing efficiency.
- **Respiratory Depression** — Respiratory depression. A condition where the respiratory rate becomes abnormally slow or the depth of breathing becomes shallow, reducing the lungs' ability to exchange gases. It is a serious complication that can occur in COPD patients when excessive oxygen is administered.

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