A nurse is conducting a neurological assessment on a patient with suspected increased intracranial pressure (ICP). Which assessment finding would be the most concerning and require immediate intervention?

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse for Mr. Johnson, a 65-year-old male admitted 24 hours ago after a fall with a subdural hematoma. His initial GCS was 13. During your hourly neuro check, you note his heart rate has dropped from 88 to 52 bpm, his respirations have become irregular (periods of apnea followed by deep breaths), and his BP is 182/94 mm Hg (pulse pressure of 88).

Nursing Intervention Strategy: 1. Immediate Assessment & Action (ABCs): - Airway: Ensure patency. Be prepared to assist with ventilation if respirations become inadequate. - Breathing: Apply oxygen via non-rebreather mask as ordered. Have suction ready. - Circulation: Check pulse, BP. Do not treat the hypertension aggressively; it is a compensatory mechanism. - Disability (Neuro): Quickly re-check GCS and pupil size/reactivity. Note any posturing. 2. Communication & Collaboration: - Activate the Rapid Response Team or STAT page the physician/neurosurgeon. - Clearly communicate: "Patient exhibiting Cushing's triad: HR 52, irregular respirations, BP 182/94." 3. Prepare for Orders: - Have Mannitol 20% ready for IV administration. Know the infusion rate (usually over 20-30 minutes) and monitor for fluid overload. - Be prepared for stat CT scan. Ensure patient is stable for transport. - Anticipate possible intubation and mechanical ventilation with mild hyperventilation (target PaCO2 ~35 mm Hg) to cause cerebral vasoconstriction and lower ICP.

Patient Safety and Precautions: - Positioning is Critical: Keep HOB elevated 30 degrees with head in neutral alignment (no neck flexion) to promote venous drainage from the brain. - Minimize Stimuli: Cluster nursing care to avoid frequent disturbances that can raise ICP. - Monitor for Complications: After mannitol, watch for hypotension, electrolyte imbalances (hypernatremia, hypokalemia), and worsening renal function. Nursing Procedure & Medication Flow Administering Mannitol for Increased ICP: 1. Assessment: Check BUN, creatinine, and serum osmolality prior to administration. Ensure IV access is patent (preferably a large-bore catheter). 2. Preparation: Mannitol often crystallizes; warm the vial in hands or use a filter needle to draw up. Use an in-line filter for infusion. 3. Administration: Administer as a rapid IV infusion per order (e.g., 0.25-1 g/kg over 20-30 minutes). Monitor for signs of infiltration—it can cause tissue necrosis. 4. Monitoring: Monitor ICP, urine output (expect diuresis), electrolytes, and vital signs closely. A sudden drop in BP can indicate hypovolemia. A Word from Your Senior Nurse "Neurological nursing is about being a detective and a first responder. The brain tells you it's in trouble through subtle—and then not-so-subtle—clues. Your vigilant, hourly neuro checks are not just a task; they are your primary tool to catch a crisis before it becomes catastrophic. When you see Cushing's triad, your heart might race, but your training must take over. You are the one at the bedside who connects the dots from bradycardia to brainstem herniation. That knowledge, and the confident, swift action it triggers, is what saves lives. Study these signs until they are second nature."