A nurse is caring for a patient with viral encephalitis who is experiencing increased intracranial pressure (ICP). Which nursing intervention should be the priority?
The nurse is monitoring a patient diagnosed with viral encephalitis who has developed signs of increased intracranial pressure including altered level of consciousness, headache, and vomiting.
1Encourage frequent coughing and deep breathing exercises
2Position the patient in Trendelenburg position to improve cerebral perfusion
3Elevate the head of the bed 30-45 degrees and maintain neck in neutral alignment✓ 정답
4Administer large volumes of hypotonic IV fluids to prevent dehydration
해설
Proper positioning (head elevated 30-45 degrees with neutral neck alignment) is the priority for managing increased ICP in encephalitis patients to promote venous drainage and reduce pressure. Other interventions like coughing exercises, Trendelenburg position, or hypotonic fluids can worsen ICP.
Core Nursing ExplanationKey Concept Analysis: This question tests the priority nursing intervention for managing Increased Intracranial Pressure (ICP) in a patient with Viral encephalitis. The pathophysiology involves brain inflammation and edema, which increases the volume inside the rigid skull, leading to elevated pressure. This pressure can compromise cerebral blood flow and brain tissue, potentially leading to herniation and death. The priority is to implement measures that reduce ICP and optimize cerebral perfusion pressure (CPP).
Answer Rationale: Key Point! Elevating the head of the bed 30-45 degrees with the neck in neutral alignment is the priority intervention. This position promotes venous drainage from the brain via the jugular veins, reducing cerebral blood volume and, consequently, ICP. Maintaining a neutral neck prevents kinking of the jugular veins, which would impede drainage and increase ICP. This is a fundamental, non-invasive, and immediate action the nurse can take.
Distractor Analysis:
Watch out for confusion! Option ①, encouraging coughing and deep breathing, is contraindicated. While these are generally good for lung expansion, the Valsalva maneuver (straining) associated with coughing increases intrathoracic pressure, which impedes jugular venous return and can cause a dangerous spike in ICP.
Option ②, Trendelenburg position (head down), is absolutely incorrect for increased ICP. This position increases venous pressure in the head, dramatically worsening cerebral edema and ICP. It is used for hypotension or shock, not for neurological conditions with elevated ICP.
Option ④, administering large volumes of hypotonic IV fluids (e.g., 0.45% NaCl), is dangerous. Hypotonic fluids can shift fluid from the vasculature into brain tissue, exacerbating cerebral edema. Fluid management in increased ICP aims for euvolemia (normal volume status), often using isotonic fluids like 0.9% Normal Saline.
Related Concepts: Managing increased ICP follows the Monro-Kellie doctrine: the skull is a fixed container holding brain tissue, blood, and cerebrospinal fluid (CSF). An increase in one component (like tissue edema from encephalitis) must be compensated by a decrease in another to prevent pressure rise. Nursing care focuses on reducing cerebral blood volume and edema.Nursing Clinical Practice GuideClinical Scenario: You are the nurse for Mr. Johnson, a 28-year-old admitted with confusion, fever, and severe headache, later diagnosed with viral encephalitis. During your shift, you note his Glasgow Coma Scale (GCS) score has dropped from 14 to 11, he's increasingly lethargic, and he reports a worsening "bursting" headache. His vital signs show a widening pulse pressure and bradycardia (Cushing's triad—a late sign).
Nursing Intervention Strategy:
Assessment & Monitoring: Perform frequent neurological checks (GCS, pupil size and reactivity, motor strength). Monitor vital signs for Cushing's triad (hypertension, bradycardia, irregular respirations). Assess for nausea/vomiting and headache.
Immediate Actions (Priority): Elevate HOB to 30-45 degrees. Ensure the head is midline, not turned or flexed, to maintain jugular venous patency. Administer prescribed osmotic diuretics (e.g., Mannitol) or hypertonic saline to draw fluid out of brain tissue.
Environment & Care: Maintain a calm, quiet environment to minimize stimulation that could increase ICP. Cluster nursing care to allow for rest periods. Avoid activities that cause straining (Valsalva), such as vigorous suctioning or constipation.
Patient Safety & Precautions: Implement seizure precautions. When suctioning is necessary (for airway clearance), pre-oxygenate and limit suction passes to <10 seconds to minimize hypoxia and ICP elevation. Strictly monitor intake and output and serum osmolality if on diuretic therapy.
Nursing Procedure & Medication FlowPositioning Procedure:
1. Use an electric bed or adjustable bed frame.
2. Slowly raise the head of the bed to 30 degrees, then up to 45 degrees as tolerated.
3. Place a small pillow under the patient's head for comfort, ensuring it does not cause neck flexion.
4. Use pillows or rolled towels to support the arms and maintain body alignment.
5. Continuously assess for patient tolerance and neurological status after positioning.
Medication Alert: When administering Mannitol:
- Use a filter needle to draw up the solution, as it may crystallize.
- Administer via a large-bore IV as a rapid infusion (usually over 20-30 mins) as ordered.
- Monitor for signs of fluid overload and heart failure initially (as it expands plasma volume), then for dehydration and electrolyte imbalances (especially hypokalemia).
- Monitor serum osmolality; a gap >10 mOsm/kg may indicate mannitol accumulation.
A Word from Your Senior Nurse
"In neuro nursing, you are the guardian of the patient's brain pressure. That head-of-bed elevation isn't just a 'nice-to-do'—it's a critical intervention. I've seen a patient's ICP numbers on the monitor drop just from correcting a turned head to a neutral position. Always think about venous drainage. And remember, in questions about priorities with neuro patients, airway and ICP management often top the list. On the NCLEX, if you see 'increased ICP' and an option about HOB elevation/neutral alignment, it's very often the right answer. Connect the dots: position -> venous drainage -> lower ICP -> better brain perfusion. That's the lifesaving chain you're managing."
Increased Intracranial Pressure — A pathological condition where the pressure inside the skull exceeds the normal range (5-15 mmHg). It results from an increase in the volume of brain tissue, blood, or cerebrospinal fluid within the rigid cranial vault, potentially leading to brain ischemia and herniation.
Cerebral Perfusion Pressure — The net pressure gradient driving blood flow to the brain. Calculated as Mean Arterial Pressure (MAP) minus ICP (CPP = MAP - ICP). Adequate CPP (typically 60-100 mmHg) is essential for delivering oxygen and nutrients to brain tissue.
Monro-Kellie Doctrine — The principle that the cranial compartment is incompressible, and the volume inside the skull is fixed. The total volume of brain tissue, blood, and cerebrospinal fluid (CSF) must remain constant. An increase in one component must be compensated by a decrease in another to prevent a rise in ICP.
Valsalva Maneuver — Forced exhalation against a closed airway (e.g., during straining, coughing, bearing down). This increases intrathoracic and intra-abdominal pressure, which impedes venous return from the brain, causing a transient but significant increase in intracranial pressure.
Cushing's Triad — A classic but late sign of significantly increased ICP and impending brain herniation. The triad consists of: 1) Hypertension (with a widening pulse pressure), 2) Bradycardia, and 3) Irregular respirations (Cheyne-Stokes or ataxic breathing).