# A 4-year-old child with Kawasaki disease has been hospitalized for 6 days. The child presents with persistent high fever, bilateral conjunctival injection, strawberry tongue, and polymorphous rash. Laboratory results show elevated ESR and CRP. What is the nurse's priority action at this time?

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> subject: Infectious Diseases

## 문제

A 4-year-old child with Kawasaki disease has been hospitalized for 6 days. The child presents with persistent high fever, bilateral conjunctival injection, strawberry tongue, and polymorphous rash. Laboratory results show elevated ESR and CRP. What is the nurse's priority action at this time?

## 보기

1. Administer acetaminophen for fever reduction
2. Encourage increased fluid intake to prevent dehydration
3. Prepare for immediate echocardiogram to assess cardiac status **✔ 정답**
4. Apply cool compresses to reduce skin irritation from the rash

**정답: 3**

## 해설

In Kawasaki disease, cardiac complications like coronary artery aneurysms are the most serious concern, requiring immediate echocardiogram for assessment. Other options (fever reduction, hydration, skin care) are supportive but secondary to preventing life-threatening cardiac issues.

## 심화 해설

Understanding the Priority in Kawasaki Disease

For a child hospitalized with Kawasaki disease (KD) who is now on day 6 of illness with persistent fever and classic clinical signs, the nurse's priority action is to prepare for an immediate echocardiogram. The primary goal during the acute phase of KD is not simply symptom management but the prevention of its most serious complication: coronary artery aneurysms (CAAs). The timing of this assessment is critical.

Kawasaki disease is a systemic vasculitis with a strong tropism for the coronary arteries. The risk of developing CAAs is tightly linked to the duration and severity of inflammation. The subacute phase, which typically begins around day 10 of illness, is the highest-risk period for aneurysm formation. However, the inflammatory cascade that damages the vessel wall begins much earlier. A child at day 6 with persistently elevated inflammatory markers, such as an elevated ESR and CRP, is in a window where ongoing vasculitis is actively causing endothelial injury. An echocardiogram at this stage serves as a critical baseline to assess for early coronary artery dilation or myocarditis, which directly guides the escalation of therapy to prevent progression to giant aneurysms [1,3].

The other options, while representing important supportive care measures, do not address the primary, life-altering risk. Administering acetaminophen for fever or applying cool compresses for rash are comfort measures that do not alter the disease course. Encouraging fluids is essential for hydration but is secondary to a diagnostic procedure that can detect a rapidly developing, silent cardiac complication. The management of KD, especially in refractory cases, involves a complex balance of controlling aggressive inflammation to protect the coronary arteries, making cardiac assessment the immediate priority over symptomatic relief [1,3].

## 임상 시나리오

Clinical Guide for Prioritizing Care in Acute Kawasaki Disease

For a child hospitalized with KD on day 6 with persistent fever and elevated inflammatory markers, the nurse's priority is to facilitate an immediate echocardiogram. Active vasculitis is causing endothelial injury, and a baseline cardiac assessment is critical to guide therapy and prevent coronary artery aneurysms.

- **Primary Goal:** Prevent coronary artery complications, not just symptom relief. The timing of the echo is crucial before the subacute phase (day 10+), when aneurysm risk peaks.

- **Nursing Action:** Prepare the child and family for a stat echocardiogram. Explain the procedure simply: "We need to take a picture of your heart with a special camera to make sure the sickness isn't bothering it." Coordinate with the cardiology team.

- **Assessment Rationale:** An echo at this stage serves as a baseline to detect early coronary artery dilation, myocarditis, or pericardial effusion. Findings directly influence the decision to escalate therapy (e.g., IVIG resistance, adding corticosteroids).

- **Supportive Care Context:** While comfort measures (antipyretics, hydration, skin care) are important, they are secondary to the life-altering risk of cardiac damage. They should be performed after the diagnostic priority is initiated.

## 핵심 개념

- **Kawasaki Disease (KD)** — An acute systemic vasculitis primarily affecting children under 5, with a predilection for coronary arteries, potentially leading to aneurysms.
- **Coronary Artery Aneurysm (CAA)** — A pathological dilation of a coronary artery segment, the most serious complication of KD, typically developing during the subacute phase.
- **Echocardiogram** — A non-invasive ultrasound of the heart used to establish a baseline and serially monitor for coronary artery dilation, myocarditis, or pericardial effusion in KD.
- **Acute Phase of KD** — The initial 1-2 weeks of illness characterized by high fever and acute inflammation, during which endothelial injury occurs and a baseline echo is essential.
- **Subacute Phase of KD** — The period typically beginning around day 10, marked by desquamation and the highest risk for coronary artery aneurysm formation.

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