CSF DisordersReviewed by Dr. Julius Mautin Vitowanu, Consultant Neurosurgeon · 2026-03-20

Ventriculoperitoneal (VP) Shunting & Endoscopic Third Ventriculostomy (ETV)

Surgical diversion and physiological restoration of cerebrospinal fluid flow to alleviate hydrocephalus and normalized intracranial pressure.

Clinical Safety Disclaimer: This surgical overview is provided for patient education. Surgical recommendations are made only after in-person clinical examination and formal slice-by-slice neuroimaging review.

01 / Operative Overview

What Is This Procedure?

Hydrocephalus occurs when excess cerebrospinal fluid (CSF) builds up within the ventricular cavities of the brain. Treatment involves either placing a specialized silicone catheter system with a differential-pressure valve (VP Shunt) that diverts fluid into the peritoneal cavity of the abdomen, or performing a minimally invasive neuroendoscopic procedure (Endoscopic Third Ventriculostomy / ETV) that creates a natural internal bypass for fluid circulation.

02 / Clinical Indications

Why It May Be Recommended

Obstructive or communicating hydrocephalus causing headache, vomiting, lethargy, or visual impairment

Normal Pressure Hydrocephalus (NPH) causing classic gait disturbance, urinary incontinence, and dementia

Secondary hydrocephalus following craniospinal AVM rupture, trauma, or meningitis

Congenital aqueductal stenosis diagnosed in pediatric or adult patients

03 / Surgical Mechanism

How It Works

In a VP shunt, a thin catheter enters the lateral ventricle through a cranial burr hole, connects to a valve behind the ear, and tunnels under the skin down into the abdomen where the body harmlessly absorbs the CSF. In an ETV, a rigid neuro-endoscope is guided into the third ventricle, and a small opening is created in the floor of the third ventricle (tuber cinereum) into the prepontine subarachnoid space, avoiding any permanent artificial hardware.

04 / Preoperative Protocol

Preparation & Clinical Workup

STEP 1Thin-slice sagittal volumetric T2/CISS or FIESTA MRI to assess third ventricular floor anatomy and aqueduct patency

STEP 2In suspected NPH, diagnostic high-volume lumbar puncture (tap test) to assess cognitive and gait responsiveness

STEP 3Sterile skin preparation and screening for active systemic or cutaneous infections

STEP 4Comprehensive surgical counseling regarding shunt maintenance and signs of malfunction

05 / In the Operating Suite

Operative Sequence

01Endotracheal general anesthesia with patient positioned supine and neck gently turned

02Cranial incision over Kocher's point (frontal) or Keen's point (parieto-occipital)

03Burr hole creation and ventricular catheter insertion into the frontal horn under guidance

04Subcutaneous tunneling of distal catheter across the neck and chest down to the abdominal wall

05Abdominal mini-laparotomy and placement of distal tubing into the peritoneal cavity

06Verification of spontaneous CSF flow and manometric pressure before final closure

06 / Postoperative Course

Recovery & Aftercare

Neurological observation and monitoring of abdominal recovery over 24 to 48 hours

Gradual resumption of normal diet following return of bowel sounds

Postoperative non-contrast head CT to verify catheter positioning and ventricular size reduction

Wound care inspection at day 7 to 10

Patient education regarding symptoms of shunt blockage (headache, vomiting, recurring gait instability)

07 / Surgical Risks & Transparency

Risks & Clinical Considerations

Mechanical shunt obstruction or catheter disconnection requiring revision

Shunt infection (highest in the first 6 months, requiring antibiotic therapy or temporary exteriorization)

Overdrainage leading to subdural hygromas or low-pressure headaches

Underdrainage requiring valve pressure adjustment (with programmable valves) or revision

08 / Common Inquiries

Frequently Asked Questions

Can an ETV be performed instead of a shunt in every patient?

ETV is most successful in pure obstructive (non-communicating) hydrocephalus where the subarachnoid spaces can absorb fluid. In communicating hydrocephalus or post-infectious scarring, a VP shunt is typically required.

Can I have an MRI with a shunt in place?

Yes. Fixed-pressure valves are completely MRI safe. Programmable valves are MRI conditional, meaning they can undergo MRI scans but require clinical verification or resetting of the valve pressure afterward.

How long does a VP shunt last?

Many shunts function reliably for years or even decades. However, patients and caregivers should always be familiar with symptoms of malfunction in case a revision is needed.

Surgical Assessment

Discuss Your Case with Dr. Vitowanu

Have you been advised to undergo this surgery or do you require a specialist second opinion on your imaging?

Request Consultation ↗Second Opinion Details

Related Conditions

Brain & Craniospinal Arteriovenous Malformations (AVMs)Read condition guide Hydrocephalus & CSF Circulation DisordersRead condition guide

Dr. Julius Mautin Vitowanu

Consultant Neurosurgeon, Lagos State University Teaching Hospital (LASUTH). Fellow, West African College of Surgeons (WACS).

Read Full Credentials