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Cerebral Aneurysm | 마이메르시 MyMerci
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Cerebral Aneurysm

NCLEX Review Guide: Cerebral Aneurysm

Pathophysiology & Types

Definition & Classification

  • A cerebral aneurysm is a localized dilation or ballooning of a cerebral artery wall due to weakness in the vessel structure
  • Berry aneurysms are the most common type, typically occurring at bifurcations in the Circle of Willis
  • Risk factors include hypertension, smoking, family history, polycystic kidney disease, and connective tissue disorders

Memory Aid: "BURST"

  • Blood pressure (hypertension)
  • Unruptured initially
  • Rupture risk increases with size
  • Smoking increases risk
  • Thunder clap headache when ruptured

Key Points

  • Most aneurysms are asymptomatic until rupture occurs
  • Aneurysms >7mm have higher rupture risk

Clinical Manifestations

Unruptured vs Ruptured Aneurysm

Unruptured Aneurysm Ruptured Aneurysm (SAH)
Often asymptomatic Sudden, severe "thunderclap" headache
May cause cranial nerve compression Nausea, vomiting, photophobia
Visual disturbances if large Nuchal rigidity, altered LOC
Localized headaches Seizures, focal neurologic deficits

Clinical Scenario

A 45-year-old patient presents with sudden onset of severe headache described as "the worst headache of my life," accompanied by nausea, vomiting, and neck stiffness. This classic presentation suggests subarachnoid hemorrhage from ruptured cerebral aneurysm.

Key Points

  • "Thunderclap headache" is pathognomonic for SAH
  • Hunt-Hess scale grades SAH severity (I-V)

Diagnostic Studies & Management

Diagnostic Approach

  • CT scan without contrast is the first-line diagnostic test for suspected SAH, showing blood in subarachnoid space
  • Lumbar puncture may be performed if CT is negative but clinical suspicion remains high
  • CT angiography or cerebral angiography identifies the aneurysm location and characteristics

Surgical Management

  1. Surgical clipping: Microsurgical placement of titanium clip across aneurysm neck
  2. Endovascular coiling: Platinum coils inserted via catheter to occlude aneurysm
  3. Flow diverters: Stent-like devices for complex aneurysms

Key Points

  • Early intervention (within 72 hours) reduces rebleeding risk
  • Coiling is less invasive but may require repeat procedures

Nursing Management & Complications

Priority Nursing Interventions

  • Maintain systolic BP 120-160 mmHg to prevent rebleeding while ensuring cerebral perfusion
  • Implement seizure precautions and maintain quiet, darkened environment
  • Monitor neurological status using Glasgow Coma Scale every 15 minutes initially
  • Administer prescribed medications: nimodipine for vasospasm prevention, antiepileptics if indicated

Major Complications

Complication Timeline Nursing Priority
Rebleeding First 24-48 hours BP control, activity restriction
Vasospasm Days 4-14 Neurological monitoring, fluid management
Hydrocephalus Days to weeks ICP monitoring, CSF drainage

Memory Aid: "3 H's of SAH Complications"

  • Hydrocephalus
  • Hyponatremia (SIADH/CSW)
  • Hunt for vasospasm (delayed ischemic deficit)

Key Points

  • Vasospasm peaks around day 7-10 post-hemorrhage
  • Triple-H therapy (hypervolemia, hypertension, hemodilution) may be used for vasospasm

Patient Education & Discharge Planning

Lifestyle Modifications

  • Smoking cessation is crucial as smoking significantly increases aneurysm formation and rupture risk
  • Blood pressure management through medication compliance, diet modification, and regular monitoring
  • Avoid activities that cause sudden increases in intracranial pressure (Valsalva maneuvers, heavy lifting)
  • Follow-up imaging as scheduled to monitor for aneurysm recurrence or new formation

Important Alert

Teach patients to seek immediate medical attention for sudden severe headache, especially if different from previous headaches.

Key Points

  • Family screening may be recommended due to genetic predisposition
  • Cognitive and emotional support may be needed for recovery

Commonly Confused Concepts

Concept Cerebral Aneurysm Stroke Migraine
Headache onset Sudden, severe "thunderclap" May or may not have headache Gradual onset, throbbing
Associated symptoms Nuchal rigidity, photophobia Focal deficits, speech changes Nausea, visual aura
Diagnostic test CT scan, LP if needed CT/MRI, carotid studies Clinical diagnosis

Quick Check: Warning Signs

  • ☐ Can you identify the classic "thunderclap headache"?
  • ☐ Do you know the 3 major complications of SAH?
  • ☐ Can you explain why BP control is critical?
  • ☐ Do you understand the difference between clipping and coiling?

Remember: You're preparing to save lives and provide compassionate care. Every concept you master brings you closer to becoming the nurse your patients need. Stay focused, stay positive, and trust your preparation!

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