Nursing Clinical Practice Guide
Clinical Scenario: You are the nurse for Mr. Johnson, 58, admitted post-fall with a suspected subdural hematoma (SDH). He was initially alert but is now increasingly drowsy and difficult to arouse.
Nursing Intervention Strategy:1. Assessment: Perform focused, frequent neurological checks using the Glasgow Coma Scale (GCS).Pupil checks are critical: assess size (in mm), shape, equality, and reaction to light. Use a bright penlight and document meticulously: "Pupils: Right 2mm, brisk. Left 6mm, non-reactive to light."- 2Immediate ActionIf you detect a new, unilateral dilated pupil, this is a RED FLAG. Your immediate actions are:
• Call the Rapid Response Team or physician STAT.
• Ensure the patient's head of bed (HOB) is elevated to 30-45 degrees to promote venous drainage.
• Maintain head in midline, neutral position to avoid jugular vein compression.
• Prepare for emergency interventions: administration of osmotic diuretics like Mannitol, or hypertonic saline, and possible preparation for emergency surgery (craniotomy).
- 3Monitoring & CareContinuously monitor vital signs for Cushing's Triad. Minimise activities that increase ICP (cluster care, avoid Valsalva maneuver, manage pain and agitation). Anticipate needs for intubation if the patient's airway becomes compromised due to decreased consciousness.
Patient Safety and Precautions: Never dismiss a subtle change in pupil reaction or size. In patients with head injury or stroke, a change in pupil status often precedes a rapid clinical decline. When administering Mannitol, monitor for electrolyte imbalances (especially hypernatremia and hypokalemia) and ensure adequate IV access as it is a potent diuretic.
Nursing Procedure & Medication Flow
Neurological Assessment (Pupil Check):
1. Explain the procedure to the patient (if conscious).
2. Dim room lights slightly.
3. Shine a bright penlight from the outer canthus of the eye toward the pupil. Observe for direct constriction in the illuminated eye.
4. Quickly swing the light to the other eye to observe for consensual constriction.
5. Document: PERRLA (Pupils Equal, Round, Reactive to Light and Accommodation) or note any abnormalities precisely.
Mannitol Administration:
• Action: Osmotic diuretic that draws fluid from brain tissue into the vasculature, reducing cerebral edema and ICP.
• Precautions: Administer via a filtered IV line. Monitor for crystallization; warm the bottle if needed. Monitor intake and output (I&O) closely, serum osmolality, and electrolytes.
• Contraindications: Severe renal impairment, active intracranial bleeding (relative).
A Word from Your Senior Nurse
"Remember, the eyes are the window to the brainstem. A single dilated pupil isn't just an 'abnormal finding'—it's the brain screaming for help. In neuro nursing, your assessment skills are your most powerful tool. Catching this sign early can literally save a life. On the NCLEX, they love to test your ability to prioritize. A new, fixed dilated pupil will always trump other assessment findings in terms of urgency. Think: 'Airway, Breathing, Circulation... and Neurological Emergency!'"