# A 2-year-old toddler is admitted to the pediatric unit with suspected Kawasaki disease. Which assessment finding would be most indicative of the acute phase of this condition?

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## 문제

A 2-year-old toddler is admitted to the pediatric unit with suspected Kawasaki disease. Which assessment finding would be most indicative of the acute phase of this condition?

## 보기

1. High fever for 3 days with peeling skin on fingers and joint swelling
2. High fever for 6 days with bilateral conjunctival injection and strawberry tongue **✔ 정답**
3. High fever for 5 days with coronary artery dilation on echocardiogram
4. High fever for 4 days with elevated platelet count of 600,000/mm³

**정답: 2**

## 해설

High fever for 6 days with bilateral conjunctival injection and strawberry tongue are classic acute phase findings of Kawasaki disease. Other options are seen in later phases or are diagnostic findings.

## 심화 해설

Understanding Kawasaki Disease and the Acute Phase

Kawasaki disease (KD) is an acute, self-limited systemic vasculitis that primarily affects children under 5 years of age. The diagnosis is clinical, based on a constellation of criteria, with the hallmark being a prolonged fever. Understanding the timeline of manifestations is critical for the NCLEX-RN, as the disease is divided into three phases: acute, subacute, and convalescent. The question asks you to identify findings most indicative of the acute phase, which typically lasts from day 1 to day 14 of the illness.

Analyzing the Correct Answer (Option 2)

Option 2 describes a high fever for 6 days with bilateral conjunctival injection and strawberry tongue. This is the classic presentation of the acute phase. The diagnostic criteria for classic KD require fever for at least 5 days plus four of five principal clinical features, which are often remembered by the mnemonic "WARM CREAM": Conjunctivitis (bilateral, non-exudative), Rash (polymorphous), Adenopathy (cervical, usually unilateral), Mucosal changes (strawberry tongue, cracked lips), and Extremity changes (edema, erythema of palms/soles). The presence of fever with mucosal changes and conjunctival injection directly reflects the intense systemic inflammation occurring during the acute phase [2]. The case report by Xiang and Xiong highlights a patient with a 6-day history of persistent fever, rash, conjunctival injection, and oral mucosal changes as the typical presentation of KD [2].

Why the Other Options Are Incorrect

Option 1: High fever for 3 days with peeling skin on fingers and joint swelling

This option is incorrect for two key reasons. First, the fever duration of only 3 days does not meet the fundamental diagnostic criterion of ≥5 days of fever. Second, periungual desquamation (peeling skin on the fingers and toes) is a characteristic finding of the subacute phase, not the acute phase. This peeling typically begins 2-3 weeks after the onset of fever. Joint swelling (arthritis) can also occur later in the disease course. This option mixes an insufficient fever duration with a late-phase finding.

Option 3: High fever for 5 days with coronary artery dilation on echocardiogram

While a fever for 5 days is consistent with the acute phase, the presence of coronary artery dilation is a finding that develops later. The primary goal of treatment during the acute phase is to prevent this very complication. Coronary artery aneurysms or dilation are not typically detectable on echocardiogram during the first week of illness; they most often appear during the subacute phase (weeks 2-4). Therefore, this finding is not indicative of the initial acute presentation.

Option 4: High fever for 4 days with elevated platelet count of 600,000/mm³

This option contains two inconsistencies. The fever duration is only 4 days, which is insufficient for a clinical diagnosis. More importantly, the platelet count is significantly elevated at 600,000/mm³. In the acute phase of KD, the platelet count is usually normal or may even be slightly decreased. A marked thrombocytosis, often reaching 1,000,000/mm³, is a hallmark laboratory finding of the subacute phase, typically peaking around week 3. This elevated count reflects a reactive process following the initial inflammatory storm, not the acute phase itself.

Key Clinical Pearls for the NCLEX-RN

The acute phase of Kawasaki disease is defined by high, unrelenting fever and the classic mucocutaneous signs. The case report by Fouad et al. reinforces this timeline, describing a child with a persistent fever lasting 7 days who presented with the classic clinical criteria for KD . While that report focuses on a rare nail finding (orange-brown chromonychia) appearing on the 7th day as an early diagnostic clue, it underscores that the core diagnostic signs—fever, conjunctivitis, and oral changes—are the bedrock of acute phase recognition . For the exam, remember that desquamation, thrombocytosis, and coronary artery abnormalities are features of the subacute phase that follow the initial acute presentation. Your nursing assessment during the acute phase must focus on monitoring the fever pattern, documenting the evolving mucocutaneous signs, and providing supportive care while preparing for intravenous immunoglobulin (IVIG) and high-dose aspirin therapy to reduce the risk of coronary artery sequelae.References (research sources)

- [2]Kawasaki disease presenting with severe airway obstruction: a case report.Case reportXiang Y, Xiong D. (2026) · DOI: 10.3389/fped.2026.1797418

## 임상 시나리오

Clinical Practice Guide: Kawasaki Disease Assessment

Kawasaki disease (KD) is a leading cause of acquired heart disease in children. The acute phase (days 1-14) is defined by high fever unresponsive to antipyretics and at least four of five principal clinical features. The mnemonic "WARM CREAM" helps recall these criteria: **C**onjunctivitis (bilateral, non-exudative), **R**ash (polymorphous), **A**denopathy (cervical, often unilateral >1.5 cm), **M**ucosal changes (strawberry tongue, cracked lips, pharyngeal erythema), and **E**xtremity changes (erythema and edema of palms/soles).

Nurses must differentiate acute from subacute findings. Acute indicators include the fever and the "CREAM" signs. Subacute findings (weeks 2-4) include periungual desquamation of fingers and toes, thrombocytosis, and the development of coronary artery aneurysms. Prompt recognition and administration of IVIG and high-dose aspirin within the first 10 days of fever significantly reduce the risk of coronary complications.

**Key Nursing Actions:** Monitor cardiac status with echocardiogram, manage fever, provide comfort for mucositis and skin irritation, and educate families on the importance of follow-up echocardiograms and potential for irritability lasting weeks.

## 핵심 개념

- **Kawasaki Disease (KD)** — An acute, self-limited systemic vasculitis primarily affecting children under 5, characterized by prolonged fever and inflammation of medium-sized arteries.
- **Acute Phase (KD)** — The initial stage of KD lasting 1-14 days, marked by high fever and principal clinical features such as conjunctivitis, rash, and mucosal changes.
- **Strawberry Tongue** — A classic mucosal change in KD where the tongue appears red and swollen with prominent papillae, indicating systemic inflammation.
- **Bilateral Conjunctival Injection** — Non-exudative redness of both eyes, a key diagnostic criterion for the acute phase of KD.
- **Subacute Phase (KD)** — The phase following the acute stage, lasting about 2-4 weeks, characterized by desquamation of fingers/toes, thrombocytosis, and risk of coronary artery aneurysms.

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