# A nurse is caring for a 55-year-old patient with pneumonia who has been receiving antibiotic therapy for 48 hours. Which assessment finding would be the priority concern requiring immediate intervention?

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## 문제

A nurse is caring for a 55-year-old patient with pneumonia who has been receiving antibiotic therapy for 48 hours. Which assessment finding would be the priority concern requiring immediate intervention?

## 보기

1. Temperature of 100.8°F (38.2°C) with mild diaphoresis and flushed skin
2. Productive cough with yellow-green sputum and coarse crackles
3. Oxygen saturation of 88% on room air with increased work of breathing **✔ 정답**
4. White blood cell count of 12,000/mm³ with left shift noted

**정답: 3**

## 해설

Oxygen saturation of 88% with increased work of breathing indicates severe hypoxemia requiring immediate intervention for respiratory support. Other findings (fever, productive cough, elevated WBC) are expected in pneumonia and do not pose an immediate life threat.

## 심화 해설

Understanding the Priority Assessment Framework

In the NCLEX-RN context, when a question asks for the "priority concern requiring immediate intervention," you must apply the principles of clinical prioritization. The most widely tested framework is the Airway, Breathing, Circulation (ABC) approach. This means that any finding suggesting a compromise in the patient's airway or breathing pattern takes precedence over concerns related to circulation, temperature regulation, or infection markers, even if those other findings are abnormal.

Analyzing the Clinical Scenario

The patient is being treated for pneumonia, a condition that directly affects the lower respiratory tract. The primary pathophysiological concern is impaired gas exchange due to alveolar consolidation and inflammation. While antibiotic therapy is expected to resolve the infection over time, the nurse must continuously monitor for signs of clinical deterioration, particularly in oxygenation and ventilation.

Why Option 3 is the Priority

An oxygen saturation (SpO₂) of 88% on room air indicates significant hypoxemia. This value falls well below the acceptable threshold of 90-92%, signaling that the lungs are not adequately oxygenating the blood. The concurrent finding of increased work of breathing—which may manifest as use of accessory muscles, nasal flaring, or tachypnea—indicates that the patient is struggling to maintain even this inadequate level of oxygenation and is at high risk for respiratory muscle fatigue and impending respiratory failure. This directly threatens the "Breathing" component of the ABCs and demands immediate intervention, such as supplemental oxygen administration and urgent provider notification. The critical nature of a sudden drop in oxygen saturation is underscored by case reports where a persistent decrease in SpO₂, alongside other signs, constituted a critical emergency requiring immediate cessation of the provoking procedure and initiation of resuscitation [2].

Why the Other Options are Not the Immediate Priority

**Option 1:** A temperature of 100.8°F (38.2°C) with mild diaphoresis and flushed skin is an expected finding in a patient with an active infection like pneumonia. While it requires continued monitoring and comfort measures, it does not represent an immediate threat to the airway or breathing. Fever is a systemic response to infection and is not a priority over a critical impairment in gas exchange.

**Option 2:** A productive cough with yellow-green sputum and coarse crackles are classic clinical manifestations of pneumonia. The presence of sputum indicates that the body’s defense mechanisms are working to clear the infection. Coarse crackles are the expected auscultatory finding caused by air moving through fluid-filled airways. These findings confirm the diagnosis but do not, in themselves, signal an acute, life-threatening decline in respiratory function.

**Option 4:** A white blood cell (WBC) count of 12,000/mm³ with a left shift is a laboratory finding that confirms the presence of an acute bacterial infection. The "left shift" refers to an increase in immature neutrophils (bands), indicating that the bone marrow is releasing cells to fight the infection. This finding is important for evaluating the progress of antibiotic therapy but does not require immediate bedside intervention in the same way that a critically low SpO₂ does. In the context of pneumonia, the priority is to manage the patient’s presenting symptoms, with the most critical being oxygenation. The underlying infection and antimicrobial resistance concerns, while crucial for long-term management and stewardship, are secondary to an immediate, life-threatening hypoxemic event .References (research sources)

- [2]Right pneumothorax during endoscopic balloon dilation for oesophageal stricture following tracheoesophageal fistula surgery: a case report.Case reportYu H, Lin Y. (2026) · DOI: 10.3389/fped.2026.1825565

## 임상 시나리오

Rapid Response for Acute HypoxemiaPrioritizing ABCs in Respiratory Deterioration
An SpO₂ below 90% on room air defines critical hypoxemia requiring immediate intervention. The first action is to apply supplemental oxygen to target an SpO₂ of 92-96%.

Assess for signs of increased work of breathing: use of accessory muscles, nasal flaring, intercostal retractions, and tachypnea. These indicate impending respiratory muscle fatigue and possible failure.

CautionDo not delay oxygen administration to obtain an ABG or chest X-ray. In the ABC framework, breathing interventions take precedence over diagnostic procedures when a patient is acutely hypoxemic.

## 핵심 개념

- **Hypoxemia** — Abnormally low level of oxygen in the blood, typically defined as SpO₂ < 90% or PaO₂ < 60 mmHg.
- **Work of Breathing** — The effort required to breathe; increased work manifests as use of accessory muscles, nasal flaring, or tachypnea and can lead to respiratory failure.
- **ABC Prioritization** — A systematic approach to clinical assessment that prioritizes Airway, Breathing, and Circulation in descending order of immediate life threat.
- **Left Shift** — An increase in immature neutrophils (bands) in the WBC differential, indicating an active infection and bone marrow response.

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