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Non-Communicating Hydrocephalus Treatment: Surgical Options & Information

Non‑communicating (obstructive) hydrocephalus results from CSF flow blockage within the ventricular system (e.g., aqueductal stenosis, tectal plate glioma, colloid cyst). Treatment aims to bypass the obstruction.

Surgical Options

1. Endoscopic Third Ventriculostomy (ETV) – Preferred for Aqueductal Stenosis

  • Procedure: Neuroendoscope via burr hole → floor of 3rd ventricle fenestrated → CSF flows directly to basal cisterns (subarachnoid space).
  • Success rate: 70–90% in ideal candidates (age >1 yr, aqueductal stenosis, no prior shunt). ETV Success Score (ETVSS) predicts outcome.
  • Advantages: No foreign body, no shunt dependence, lower infection risk, preserves CSF physiology.
  • Risks: Basilar artery injury, hypothalamic injury, short‑term memory deficits, closure of stoma (late failure).

2. Ventriculoperitoneal Shunt (VPS) – Universal Fallback

  • Procedure: Ventricular catheter → valve → peritoneal catheter. Valve regulates flow (fixed, programmable, antisiphon).
  • Indications: Failed ETV, infants <1 yr, post‑infectious/hemorrhagic hydrocephalus, multiloculated ventricles.
  • Complications: Infection (5–15%), obstruction (mechanical/biological), overdrainage (subdural hematoma), underdrainage, abdominal complications.
  • Lifelong dependency: Revisions common (50% at 10 yrs).

3. Choroid Plexus Cauterization (CPC) – Adjunct to ETV

  • Mechanism: Reduces CSF production by coagulating choroid plexus in lateral ventricles.
  • Used: Infants <1 yr (ETV+CPC improves success to ~70% vs ETV alone ~50%).
  • Risks: Intraventricular hemorrhage, endothelial damage.

4. Other / Historical

  • Ventriculoatrial (VA) shunt – if peritoneal cavity unsuitable.
  • Lumboperitoneal shunt – for communicating hydrocephalus.
  • Ventriculostomy (external) – temporary.

Decision Factors

  • Age, etiology, anatomy (ETVSS), surgeon expertise, comorbidities, family preference.

Post‑Op Follow‑Up

  • Clinical assessment, head circumference (infants), imaging (US/MRI/CT).
  • Shunt: monitor for malfunction signs (headache, vomiting, lethargy, suture line swelling).
  • ETV: watch for stoma closure (symptom recurrence).

ETV is first‑line for suitable anatomy; VPS remains the workhorse. Individualized planning by a pediatric/adult neurosurgeon is essential.

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