Children with ventriculoperitoneal (VP) shunts are frequent ED visitors. For rookies, it’s crucial to remember: any child with a VP shunt and concerning symptoms is a neurosurgical emergency until proven otherwise. Missing shunt malfunction can mean rapid deterioration, herniation, or death.
What Is Hydrocephalus?
- Excess accumulation of CSF in ventricles due to obstruction, impaired absorption, or overproduction.
- Treated with VP shunts or endoscopic third ventriculostomy (ETV).
- Shunts can fail due to obstruction, infection, disconnection, or mechanical breakage.
Why It Matters
- Shunt malfunction is common: ~30–40% fail within the first year.
- Untreated, it leads to raised ICP, brain herniation, and death.
- Symptoms are often vague — rookies must maintain high suspicion.
Red Flags for Shunt Malfunction
Infants
- Bulging fontanelle.
- Irritability, lethargy.
- Poor feeding, vomiting.
- Increasing head circumference.
- “Sunset” eyes (downward gaze).
Older Children
- Headache (worse in morning).
- Nausea, vomiting.
- Vision changes, diplopia.
- Decline in school performance.
- Seizures.
- Lethargy, altered mental status.
Exam Findings
- Papilledema.
- Cranial nerve palsy (esp. VI nerve).
- Signs of increased ICP: hypertension, bradycardia, irregular respirations (Cushing’s triad — late).
ED Evaluation
- History: ask about baseline function, prior malfunctions, type of shunt.
- Exam: full neuro exam, fundoscopy, head circumference in infants.
- Imaging:
- CT head (rapid, shows ventricular size).
- Shunt series X-rays (look for disconnection, kinking).
- MRI quick-brain (if available, radiation-free).
- Labs: if infection suspected → CBC, blood cultures, CSF via shunt tap (only with neurosurgery guidance).
ED Management
- Stabilize ABCs if altered or seizing.
- Elevate head of bed, oxygen, IV access.
- Consult neurosurgery immediately if malfunction suspected.
- Start broad-spectrum antibiotics if shunt infection suspected (fever, meningismus, erythema over shunt tract).
- Admit — no child with suspected shunt malfunction is safe for discharge.
Common Rookie Mistakes
- Attributing vomiting/headache to gastroenteritis or viral illness without considering shunt.
- Forgetting to ask about shunt history in neuro presentations.
- Ordering only labs, skipping imaging.
- Delaying neurosurgery consult until after “all tests are back.”
- Discharging with “migraine” when ventricles weren’t imaged.
Rookie Pearls
- Any VP shunt child with neuro symptoms = shunt malfunction until proven otherwise.
- CT + shunt series are fast and informative in ED.
- Infection is as dangerous as obstruction — fever + shunt = red flag.
- Involve neurosurgery early — time is brain.
Take-Home Message
For rookies:
- Suspect shunt malfunction in any child with headache, vomiting, lethargy, seizures, or developmental regression.
- Get imaging and call neurosurgery immediately.
- Admit all suspected cases — no “safe” discharges.
Remember: A vomiting shunt kid doesn’t have a GI bug until you prove their shunt is working.
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