# A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Which assessment finding would be most characteristic of influenza?

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=541299  
> language: ko  
> subject: Adult Health

## 문제

A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Which assessment finding would be most characteristic of influenza?

## 보기

1. Low-grade fever with gradual onset of symptoms over 5-7 days
2. Productive cough with purulent sputum and localized chest pain
3. High fever with sudden onset of severe body aches and fatigue **✔ 정답**
4. Persistent dry cough with wheezing and shortness of breath

**정답: 3**

## 해설

Influenza is characterized by sudden onset of high fever, severe body aches, and profound fatigue, distinguishing it from other respiratory infections. Other options describe more gradual or localized symptoms typical of colds, bacterial pneumonia, or asthma.

## 심화 해설

Clinical Judgment
This question evaluates the core clinical judgment needed to differentiate between the common cold and influenza. A cold typically presents with gradual onset of upper respiratory symptoms (nasal congestion, runny nose, sore throat) and mild systemic symptoms. In contrast, influenza is characterized by sudden onset, high fever (usually >101°F/38.3°C), and severe myalgia and fatigue. Option 4 includes all three of these key elements, making it the critical cue that best indicates influenza.

Memory Tip: The mnemonic to distinguish influenza from a cold is "**S**udden, **S**evere, **S**ystemic." If symptoms are sudden, severe, and systemic, suspect influenza.

KR vs US: In Korea, the term 'dog gam' (flu) is sometimes used interchangeably for influenza and the common cold, but in US clinical settings, they are clearly distinguished. In particular, when influenza is suspected, prompt administration of antivirals (e.g., Oseltamivir) and isolation precautions (airborne + droplet isolation) are emphasized.

## 임상 시나리오

Clinical Practice Guide: Differentiating Influenza from Other Respiratory Illnesses

Key Clinical Pearls

- **Hallmark Presentation:** Abrupt onset of high fever (39-40°C), severe myalgia, and profound fatigue. Patients often recall the exact hour symptoms began.

- **Respiratory Symptoms:** Dry, non-productive cough is common and may worsen as systemic symptoms subside. Sore throat and rhinitis can occur but are less prominent.

- **Gastrointestinal Symptoms:** Nausea, vomiting, or diarrhea can occur, especially in children, but are not the primary features in adults.

Rapid Triage Decision Tree

**Step 1: Assess Onset**
Sudden onset (within hours)? If yes, suspect influenza. Gradual onset over days suggests common cold or other viral URI.

**Step 2: Evaluate Fever Pattern**
High fever (>38.5°C) with chills? Typical for influenza. Low-grade or absent fever points toward cold.

**Step 3: Identify Dominant Symptoms**
Systemic (aches, fatigue) > respiratory? Likely influenza. Localized chest pain or purulent sputum? Consider pneumonia.

Red Flags for Complications

- **Secondary Bacterial Pneumonia:** Watch for reappearance of fever, productive cough with purulent sputum, and pleuritic chest pain after initial improvement.

- **Respiratory Distress:** Dyspnea, tachypnea, or hypoxia requires immediate escalation to rule out primary viral pneumonia or ARDS.

- **Sepsis:** Altered mental status, hypotension, and worsening malaise may indicate a systemic inflammatory response.

Nursing Interventions and Patient Education

- **Infection Control:** Initiate droplet precautions. Place patient in a private room and ensure staff wear surgical masks.

- **Symptom Management:** Administer antipyretics for fever and myalgia. Encourage rest and adequate hydration.

- **Antiviral Therapy:** Oseltamivir is most effective when started within 48 hours of symptom onset. Confirm timing with the provider.

- **Vaccination Education:** Reinforce that annual influenza vaccination remains the most effective prevention strategy, even late in the season.

## 핵심 개념

- **Myalgia** — Muscle pain or aches, a prominent systemic symptom of influenza caused by the release of cytokines.
- **Abrupt Onset** — Sudden start of symptoms, often remembered to the exact hour, distinguishing influenza from the gradual onset of a cold.
- **Systemic Symptoms** — Symptoms affecting the whole body, such as fever, fatigue, and headache, which dominate the early phase of influenza.

## 같은 주제 문제

- [A nurse is assessing a 45-year-old office worker who presents to the emergency department …](https://mymerci.kr/pages/nclex_q.php?qn_id=541300)
- [A 3-year-old child diagnosed with influenza is experiencing severe muscle aches, headache,…](https://mymerci.kr/pages/nclex_q.php?qn_id=541301)
- [A nurse is caring for a 70-year-old patient diagnosed with influenza A. The patient has be…](https://mymerci.kr/pages/nclex_q.php?qn_id=541302)
- [A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Whic…](https://mymerci.kr/pages/nclex_q.php?qn_id=541864)
- [A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Whic…](https://mymerci.kr/pages/nclex_q.php?qn_id=541865)
- [A nurse is caring for a 30-year-old patient diagnosed with influenza A. The patient has be…](https://mymerci.kr/pages/nclex_q.php?qn_id=541866)
- [A nurse is caring for a 68-year-old patient diagnosed with influenza A who presents with h…](https://mymerci.kr/pages/nclex_q.php?qn_id=541867)
- [A nurse is caring for a hospitalized patient with confirmed influenza A. Which nursing int…](https://mymerci.kr/pages/nclex_q.php?qn_id=541868)

---

More free questions: [기출문제](https://mymerci.kr/)

_학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._