A nurse is caring for a patient with viral encephalitis who is experiencing increased intracranial pressure. Which nursing intervention should be the priority?

Elevating the head of the bed to 30 degrees is the priority to promote venous drainage and reduce intracranial pressure (ICP). Other interventions are important but do not address the immediate life-threatening concern of increased ICP.

Priority Intervention for Increased Intracranial Pressure in Viral Encephalitis

The correct answer is elevating the head of the bed to 30 degrees. In the context of viral encephalitis, the inflammatory process triggers cerebral edema, which leads to a rise in intracranial pressure (ICP). The immediate, non-invasive priority is to optimize venous outflow from the brain to prevent further escalation of pressure and the risk of herniation.

Pathophysiology and Clinical Rationale
Encephalitis, particularly herpetic encephalitis, can cause severe hemorrhagic necrosis and malignant edema that mimics mass lesions or stroke ^[1][3]. As brain volume increases within the fixed skull, the compensatory mechanisms fail, causing a dangerous rise in ICP. Positioning the patient with the head of the bed elevated to 30 degrees promotes jugular venous drainage, thereby reducing cerebral blood volume and lowering ICP. A prospective observational study on neurocritical patients confirmed that adjusting the head-of-bed angle directly influences cerebral hemodynamics and is a standard intervention for managing intracranial hypertension ^[2]. Maintaining this angle also ensures the airway is protected and reduces the risk of aspiration, which is critical if the patient has altered consciousness ^[1].

Why Other Options Are Not the Priority
- Administering prescribed analgesics for headache relief: While headache is a symptom of increased ICP, sedating the patient with analgesics can mask neurological changes and depress the respiratory drive, leading to hypercapnia. Carbon dioxide retention causes cerebral vasodilation, which paradoxically increases ICP further.
- Encouraging frequent position changes: Clustering nursing activities or frequently repositioning the patient can increase intrathoracic and intra-abdominal pressure, impeding venous return from the brain and causing transient spikes in ICP. In the acute phase of cerebral edema, the priority is to minimize these noxious stimuli to keep ICP stable.
- Providing emotional support: While anxiety can elevate blood pressure and ICP, the immediate physiological threat of impaired venous drainage must be corrected first. Non-pharmacological comfort measures are secondary to the physical intervention of head-of-bed elevation in a crisis.

NCLEX-RN Safety Link
The urgency of this intervention is underscored by the potential for rapid deterioration in viral encephalitis. Cases can progress to malignant edema requiring neurosurgical evaluation for decompressive craniectomy if medical management fails ^[1][3]. The nurse must recognize that head-of-bed elevation is a critical, independent nursing action that buys time by stabilizing ICP while preparing for potential escalation of care.