# A nurse is preparing to administer oxygen therapy via nasal cannula to a patient with chronic obstructive pulmonary disease (COPD). Which action should the nurse take first to ensure patient safety?

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## 문제

A nurse is preparing to administer oxygen therapy via nasal cannula to a patient with chronic obstructive pulmonary disease (COPD). Which action should the nurse take first to ensure patient safety?

## 보기

1. Check the patient's baseline oxygen saturation and respiratory status **✔ 정답**
2. Set the oxygen flow rate to 6 L/min as ordered
3. Explain the procedure to the patient and family
4. Ensure the oxygen delivery equipment is functioning properly

**정답: 1**

## 해설

Assessment is the first step of the nursing process. For COPD patients, checking baseline oxygen saturation and respiratory status is critical to avoid suppressing hypoxic drive and ensure safe oxygen therapy initiation.

## 심화 해설

Understanding the Priority: Safety in COPD Oxygen Therapy

When administering oxygen to a patient with chronic obstructive pulmonary disease (COPD), the nurse's first action must always be a thorough clinical assessment. While ensuring equipment is functional and educating the patient are important nursing responsibilities, they do not take precedence over establishing the patient's current physiological status. The primary safety risk in this population is the potential to blunt the hypoxic drive, a phenomenon where the respiratory center in the medulla becomes less responsive to elevated carbon dioxide levels over time and relies more on low oxygen levels to stimulate breathing. Administering oxygen without first knowing the baseline can precipitate hypoventilation, leading to a dangerous rise in PaCO2 and respiratory acidosis.

The systematic review by Syam et al. underscores the critical nature of detecting subtle changes in COPD status, highlighting that the onset of an acute exacerbation is defined by a symptom worsening that exceeds normal day-to-day fluctuations [1]. A nurse cannot determine if a patient is entering an exacerbation or simply experiencing their usual variation without first assessing objective data points like baseline oxygen saturation (SpO2) and respiratory rate, depth, and effort. This assessment directly informs the safe titration of oxygen. The goal is not to achieve a "normal" SpO2 of 95-100%, but rather a target saturation, often between 88-92%, that corrects hypoxemia without eliminating the respiratory drive. Setting a flow rate of 6 L/min (option 2) without this baseline assessment is unsafe, as it represents a high fixed dose that could easily overshoot the therapeutic target in a COPD patient.

Furthermore, the concept of precision in nursing care, as discussed by Almerud et al., reinforces that interventions must be tailored to the individual patient's presentation and response, not applied as a generic protocol [3]. For a COPD patient, "precision" means recognizing that their optimal oxygen saturation is a specific, often narrow, therapeutic window. The initial assessment of respiratory status and saturation is the act of gathering the biometric data needed to apply this precision. While predicting outcomes in advanced COPD is complex and models are being developed to aid in prognostication, as noted in the study protocol by Pu et al., the bedside nurse's immediate priority is the real-time, moment-to-moment safety intervention of assessing before acting . Checking the equipment (option 4) is a standard safety step, but it is performed after the clinical assessment dictates the need for and parameters of the therapy. The assessment must come first to guide all subsequent actions.References (research sources)

- [1]Differentiating the start of an exacerbation from day-to-day variation in people with COPD: a systematic review.Meta-analysis/systematic reviewSyam S, Aboelhassan A, Althobiani MA, Uysal ÖF, Sulaiman N, Shah AJ, Mandal S, Mani AR, Porter JC, Hurst JR. (2026) · DOI: 10.1183/16000617.0212-2025

- [3]Expanding the Concept of Precision Nursing from a Caring Science Perspective, with Clinical Examples from a Swedish Emergency Care Context.Research articleAlmerud S, Augustine LL, Bennesved A, Gustafsson IL, Hedqvist AT, Lindahl J, Mako T, Rosenqvist J, Svensson A, Westin E, Wireklint SC, Elmqvist C. (2026) · DOI: 10.3390/healthcare14060789

## 임상 시나리오

Oxygen Therapy in COPD: The Assessment-First RuleWhy baseline vitals must precede any intervention
The nurse's first action is always a focused respiratory assessment including SpO2, respiratory rate, depth, and effort. This establishes the baseline needed to safely titrate oxygen and detect an acute exacerbation.

In COPD, the respiratory drive may shift from a high-CO2 stimulus to a hypoxic drive. Uncontrolled oxygen can blunt this drive, leading to hypoventilation, rising PaCO2, and respiratory acidosis.

The goal is not a normal SpO2 of 95-100%, but a prescribed target range, often 88-92%. Titrate oxygen to the lowest flow rate that maintains this target saturation.

CautionNever apply a standard high-flow rate like 6 L/min to a COPD patient without a prior assessment and a specific order targeting a saturation range. Doing so risks inducing life-threatening hypercapnic respiratory failure.

## 핵심 개념

- **Hypoxic Drive** — A backup respiratory stimulus in some COPD patients where low oxygen, rather than high CO2, triggers breathing; high O2 can blunt this drive.
- **Target SpO2 in COPD** — The therapeutic goal for oxygen saturation in many COPD patients, typically 88-92%, to avoid hyperoxia and respiratory depression.

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