# A nurse is caring for a 45-year-old patient with viral encephalitis. Which nursing intervention should be the highest priority?

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## 문제

A nurse is caring for a 45-year-old patient with viral encephalitis. Which nursing intervention should be the highest priority?

A 28-year-old patient was admitted with viral encephalitis and is experiencing altered level of consciousness, fever, and photophobia.

## 보기

1. Monitor neurological status every 2 hours and report changes immediately **✔ 정답**
2. Administer prescribed antiviral medication on schedule and monitor for side effects
3. Maintain fluid balance and prevent dehydration by monitoring intake and output
4. Provide emotional support to patient and family by addressing their concerns

**정답: 1**

## 해설

Continuous neurological monitoring every 2 hours is the highest priority to detect early signs of increased ICP, such as altered consciousness or pupillary changes, which can lead to life-threatening complications like brain herniation. Other interventions like antibiotics (ineffective for viral infection), fluid management, or family support are important but secondary.

## 심화 해설

Clinical Priority Setting in Viral Encephalitis

The correct answer is Monitor neurological status every 2 hours and report changes immediately.

Why Neurological Monitoring Takes Priority

In viral encephalitis, the primary pathophysiological process is inflammation of the brain parenchyma. This inflammation leads to neuronal injury, cytotoxic edema, and potentially increased intracranial pressure (ICP). The patient’s presenting symptoms of altered level of consciousness, fever, and photophobia are direct clinical manifestations of this cerebral irritation and dysfunction. Because the brain is enclosed within the rigid skull, progressive edema can lead to herniation, a rapidly fatal complication. A study on herpes simplex virus encephalitis (HSVE) highlights that malignant edema may necessitate decompressive craniectomy as a life-saving intervention, underscoring how quickly neurological deterioration can occur [2]. Therefore, serial neurological assessments are the most direct method to detect early signs of rising ICP or worsening cerebral injury, such as changes in pupillary reactivity, motor strength, or a further decline in the Glasgow Coma Scale. A nationwide cohort study confirms that encephalitis carries substantial in-hospital mortality, reinforcing that preventing secondary brain injury through vigilant monitoring is the cornerstone of acute care [4].

Analysis of Alternative Options

While the other interventions are important, they do not address the most immediate threat to life.

-   Administering prescribed antiviral medication is a critical part of treatment, particularly in herpes simplex encephalitis where early acyclovir initiation is essential [2]. However, the therapeutic effect is not immediate; the priority during the acute phase is maintaining cerebral perfusion and preventing irreversible brain damage from unchecked edema. Medication administration is a time-sensitive task but is secondary to a dynamic assessment that could signal a need for emergent intervention.

-   Maintaining fluid balance is a supportive measure. While dehydration can cause hyperthermia and electrolyte imbalances that may worsen neurological status, and overhydration could theoretically exacerbate cerebral edema, the direct and immediate threat of herniation from the inflammatory process itself makes direct neuro-monitoring the higher priority. Fluid management is a component of the broader care plan but does not provide real-time data on brain function.

-   Providing emotional support addresses the psychosocial domain of care, which is always important. However, in a patient with an altered level of consciousness, the immediate physiological safety need takes precedence. The patient’s ability to engage in emotional support is limited by their neurological status, making this intervention a lower priority until the patient is stabilized.

Connecting Evidence to Clinical Practice

The clinical trajectory of encephalitis can be unpredictable. A diagnostic challenge report details how HSVE can mimic an ischemic stroke with focal deficits and rapidly progress to altered consciousness, requiring urgent neurosurgical evaluation when intracranial hypertension persists [2]. This evidence demonstrates that the nurse’s role at the bedside is to detect these subtle, evolving changes. A systematic review on Japanese encephalitis, another form of viral encephalitis, reports significant case fatality proportions in children, further emphasizing that the disease’s severity demands a high index of suspicion for deterioration . By performing and documenting a focused neurological check every 2 hours, the nurse creates a trend that can alert the healthcare team to a decline before it becomes irreversible, triggering timely interventions such as repeat neuroimaging, ICP monitoring, or escalation to intensive care. The use of advanced diagnostics like cerebrospinal fluid metagenomic next-generation sequencing (mNGS) is valuable for identifying the specific virus, but this etiological diagnosis does not replace the continuous, bedside clinical monitoring that directly informs life-saving decisions . The nursing process dictates that physiological integrity, specifically the risk for decreased intracranial adaptive capacity, is the highest priority in this scenario.References (research sources)

- [2]A Diagnostic Challenge: From Suspected Ischemic Stroke to Confirmed Herpetic Encephalitis.Research articleNeves MD, Pereira MG, Silveira N, Barbosa S, Sousa JMM, Pereira E, Monteiro E. (2026) · DOI: 10.1002/ccr3.72772

- [4]Nationwide Trends in Hospitalizations and Clinical Outcomes for Meningitis and Encephalitis: A 10-year Swiss Population-based Study.Research articleEssmann L, Gregoriano C, Schuetz P, Conen A, Kutz A. (2026) · DOI: 10.1093/ofid/ofag350

## 임상 시나리오

Neurological Monitoring in EncephalitisDetecting Deterioration Early
The highest priority in acute viral encephalitis is serial neurological assessment. This directly monitors for rising intracranial pressure (ICP) and impending cerebral herniation.

Assessments must include Glasgow Coma Scale (GCS), pupillary reactivity, and motor strength at least every 2 hours. A drop in GCS by 2 points or more requires an immediate report.

CautionChanges in vital signs like Cushing's triad (hypertension, bradycardia, irregular respirations) are a late and ominous sign of elevated ICP. Do not wait for these to appear before escalating care.

## 핵심 개념

- **Viral Encephalitis** — Inflammation of the brain parenchyma caused by a virus, leading to neuronal injury, cerebral edema, and potentially increased intracranial pressure.
- **Intracranial Pressure (ICP)** — The pressure inside the skull; elevated ICP from brain swelling can compress brain tissue and cause fatal herniation.
- **Glasgow Coma Scale (GCS)** — A standardized tool used to assess a patient's level of consciousness based on eye, verbal, and motor responses; a declining score indicates neurological deterioration.
- **Cerebral Herniation** — A life-threatening condition where brain tissue is displaced due to high pressure, causing irreversible damage to the brainstem.
- **Cytotoxic Edema** — Cellular swelling in the brain primarily affecting glial cells and neurons, commonly caused by ischemia or inflammation.

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