A nurse is caring for a patient with viral encephalitis who is experiencing increased intracranial pressure. Which nursing intervention should be the priority?
1Elevate the head of the bed to 30 degrees✓ 정답
2Administer prescribed analgesics for headache relief
3Encourage frequent position changes to prevent complications
4Provide emotional support to reduce patient anxiety
해설
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.
Core Nursing ExplanationKey Concept Analysis: This question tests the priority nursing intervention for a patient with viral encephalitis and increased intracranial pressure (ICP). Encephalitis is inflammation of the brain parenchyma, which leads to cerebral edema. This edema increases the volume inside the rigid skull, raising ICP. Elevated ICP can compromise cerebral perfusion, leading to brain ischemia, herniation, and death. The priority is always to manage the ABCs (Airway, Breathing, Circulation) and prevent further neurological injury by reducing ICP.
Answer Rationale: Key Point! Elevating the head of the bed to 30 degrees is the priority because it promotes venous drainage from the brain via the jugular veins, thereby reducing cerebral blood volume and ICP. This is a fundamental, non-invasive, and immediate nursing action that addresses the primary life-threatening problem. Maintaining the head in a neutral position (avoiding neck flexion) is also crucial to prevent jugular vein compression.
Distractor Analysis:
Option 2 (Administer analgesics): While headache is a classic symptom of increased ICP, administering analgesics, especially opioids, can mask changes in the level of consciousness (LOC) and depress respirations. Depressed respirations can lead to hypercapnia (high CO2), which causes cerebral vasodilation and can increase ICP. Pain management is important but secondary to maintaining a patent airway and reducing ICP.
Option 3 (Encourage frequent position changes): This is a dangerous intervention in this context. Frequent repositioning, especially turning the head side-to-side, can increase intra-abdominal and intra-thoracic pressure, impeding venous return from the brain and potentially spiking ICP. While preventing complications like pressure ulcers is important, it must be done cautiously with log-rolling technique to maintain head/neck alignment.
Option 4 (Provide emotional support): Anxiety can increase blood pressure and potentially ICP, so emotional care is part of holistic nursing. However, it does not directly address the immediate physiological threat of increased ICP and brain herniation.
Related Concepts: The nursing management of increased ICP follows the principle of maintaining cerebral perfusion pressure (CPP = MAP - ICP). Interventions aim to reduce ICP or increase mean arterial pressure (MAP) without raising ICP. Other key interventions include maintaining PaO2 > 90 mm Hg and PaCO2 at 35-45 mm Hg (avoiding hypercapnia), administering osmotic diuretics like Mannitol, and minimizing stimuli (cluster care, reduce noise).
Concept Summary
Concept
Key Points
Increased Intracranial Pressure (ICP)
Pressure > 15 mm Hg (normal: 5-15 mm Hg). Caused by mass (tumor), fluid (edema), or blood (hemorrhage).
Monro-Kellie Doctrine
The skull is rigid. Volume of (Brain + Blood + CSF) must remain constant. An increase in one component must be compensated by a decrease in another.
Cushing's Triad
Late sign of increased ICP: Hypertension, Bradycardia, Irregular respirations.
Early Signs of Increased ICP
Change in LOC (most sensitive), headache, vomiting, pupillary changes.
Side-by-Side Comparison!
Intervention for Increased ICP
Rationale & Priority
Intervention to Avoid
Reason to Avoid
Elevate HOB 30°
Promotes venous drainage, reduces ICP. High Priority.
Trendelenburg position
Increases ICP by impeding venous return.
Maintain head/neck neutral
Prevents jugular vein compression.
Neck flexion or rotation
Compresses jugular veins, increases ICP.
Cluster nursing care
Minimizes stimuli that can raise ICP.
Frequent, sudden position changes
Can cause Valsalva maneuver, spikes ICP.
Monitor PaCO2 (35-45 mmHg)
Prevents hypercapnia-induced vasodilation.
Administer high-dose opioids
Depresses respirations (causing hypercapnia) and masks LOC changes.
Venous Drainage: Cerebral veins drain into dural sinuses, then into the internal jugular veins. Any obstruction to this flow (neck flexion, high intrathoracic pressure) increases ICP.
Drug Alert: Mannitol is an osmotic diuretic used to reduce cerebral edema. It works by creating an osmotic gradient, pulling fluid from brain tissue into the vasculature. Monitor for electrolyte imbalance and fluid overload.
Memory Tips
HOB High, ICP Bye: Remember to keep the Head Of Bed High (30°) to lower ICP.
Cushing's Triad = H-B-I: Hypertension, Bradycardia, Irregular respirations. This is a late, ominous sign.
LOC is #1: A change in Level Of Consciousness is the earliest and most sensitive indicator of neurological decline.
High-Frequency NCLEX Topics
Management of increased ICP is a classic NCLEX priority question. The exam tests your ability to differentiate between a comfort intervention and a life-saving intervention. Always think Airway, Breathing, Circulation, and Neurological integrity first. Positioning is a powerful independent nursing action you will be tested on.
Watch Out for Question Variations!
Instead of asking for the priority intervention, the question might ask: "The nurse notes the patient's blood pressure is 180/100, heart rate 50, and respirations are irregular. The nurse recognizes this as?" Answer: Cushing's triad, indicating severely increased ICP.
The scenario could change to a patient post-craniotomy or with a traumatic brain injury (TBI), but the principle of HOB elevation remains the same.
A question might list multiple correct interventions and ask you to sequence them. HOB elevation and maintaining a patent airway are always first.
Nursing Clinical Practice GuideClinical Scenario: You are the nurse for Mr. Johnson, a 45-year-old admitted with suspected viral encephalitis. He is lethargic, complains of a severe headache, and has vomited twice. His Glasgow Coma Scale (GCS) score has decreased from 14 to 12 over the last hour.
Nursing Intervention Strategy:
Immediate Assessment & Action (Priority): Assess ABCs and neurological status (GCS, pupil check, motor response). Elevate HOB to 30° and ensure head is in neutral alignment. Notify the provider of the change in GCS.
Ongoing Monitoring: Monitor vital signs every 15-30 minutes, watching for Cushing's triad. Perform frequent neuro checks (every hour or as ordered). Monitor oxygen saturation and consider supplemental O2 to maintain PaO2 > 90.
Cluster Care: Plan all nursing activities (vitals, turning, hygiene) together to allow for long rest periods, minimizing environmental stimuli (dim lights, quiet).
Medication Administration: Administer Mannitol or hypertonic saline as ordered strictly on time. Monitor intake & output (I&O) and serum osmolality. For headache, acetaminophen may be preferred over opioids.
Prevent Complications: Perform log-rolling with at least two people for repositioning to maintain spinal alignment. Implement VTE prophylaxis (sequential compression devices).
Patient Safety and Precautions:
Contraindication: Do not lower the HOB flat unless ordered for a specific procedure or if the patient becomes hypotensive (which would compromise CPP).
Suctioning Precaution: If suctioning is needed, pre-oxygenate with 100% O2, limit suction passes to <10 seconds, and avoid excessive catheter insertion to prevent triggering a cough/gag reflex which spikes ICP.
Seizure Precautions: Encephalitis lowers the seizure threshold. Have airway and suction equipment at bedside. Padded side rails up.
Nursing Procedure & Medication FlowProcedure: Log-Rolling a Patient with Potential Increased ICP
1. Explain the procedure to the patient (if alert).
2. Have at least two assistants.
3. One nurse is at the head to stabilize the neck in a neutral position throughout the turn.
4. Cross the patient's arms over the chest, bend the knee on the side you are turning towards.
5. Assistants roll the patient's shoulders and hips as a single unit toward them.
6. Place pillows for support behind the back and between the knees.
7. The turn should be smooth and coordinated to avoid jerking movements.
Medication: Mannitol 20% IV
Action: Osmotic diuretic. Draws fluid from brain tissue into plasma.
Administration: Given IV via filtered tubing. Often administered as a rapid infusion (e.g., over 20-30 minutes) per order.
Monitoring: Strict I&O. Watch for signs of fluid overload initially (increased vascular volume) followed by dehydration and electrolyte loss (especially potassium). Monitor serum osmolality (goal often < 320 mOsm/kg).
A Word from Your Senior Nurse
"Managing a patient with increased ICP is intense and requires vigilant, thoughtful nursing. That simple act of raising the head of the bed is one of the most powerful tools in your arsenal. In clinical practice, you'll see how quickly a patient's neuro status can change. Your keen assessment and prompt action in positioning, monitoring, and reporting are what stand between stability and a crisis. For the NCLEX, they love to test if you know what to do *first*. Always ask yourself: 'What is the immediate threat to life or neurological function?' That will almost always lead you to the correct priority."
Increased Intracranial Pressure — A pathological condition where the pressure inside the skull exceeds the normal range (>15 mm Hg). It is a life-threatening emergency that can lead to brain herniation.
Monro-Kellie Doctrine — The physiological principle stating that the cranial compartment is incompressible, and the volume inside the cranium (brain tissue, blood, CSF) is constant. An increase in one component must be compensated by a decrease in another to prevent a rise in ICP.
Cerebral Perfusion Pressure — The net pressure gradient driving blood flow to the brain. Calculated as Mean Arterial Pressure (MAP) minus Intracranial Pressure (ICP). A CPP below 50-60 mmHg risks cerebral ischemia.
Cushing's Triad — A classic late sign of significantly increased ICP, characterized by hypertension (with a widening pulse pressure), bradycardia, and irregular respirations. It indicates impending brain herniation.
Glasgow Coma Scale — A standardized neurological assessment tool that evaluates a patient's level of consciousness based on eye opening, verbal response, and motor response. Scores range from 3 (deep coma) to 15 (fully alert).