Case Prep: Ventriculoperitoneal (VP) Shunt Placement

Case / Approach Snapshot

• Anatomy at risk: entry point, ventricular target, choroid plexus and deep veins, cortical vessels, eloquent cortex/tracts, catheter path, and distal hardware route.
• Operative steps: confirm indication and side, plan trajectory, prepare hardware, access ventricle or cistern safely, confirm flow/position, tunnel/connect devices when needed, and define infection/obstruction surveillance; use the detailed operative sequence and approach notes below as the step-by-step source.
• Rescue plans: malposition, hemorrhage, poor CSF return, overdrainage/underdrainage, obstruction, infection, abdominal/pleural complication, slit ventricles, and revision algorithm.
• Figures: review Figures, Imaging & Video and the Curated Image Set; embedded local figures should remain open-access, public-domain, or otherwise reusable with attribution.
• Papers: review High-Yield Literature for seminal sources, modern reviews, and outcome data specific to this page.

One-Liner

[Age]yo [M/F] with [communicating/obstructive] hydrocephalus due to [etiology] presenting with [headaches/gait instability/cognitive decline/enlarged head circumference] planned for right frontal VP shunt placement with [fixed/programmable] valve.

Figures, Imaging & Video

🎥 Operative videos & resources

• Technique searches: VP shunt placement on YouTube · laparoscopic VP shunt distal catheter placement
• Imaging review: Radiopaedia — VP shunt · Radiopaedia — hydrocephalus
• Open-access anatomy/technique: PubMed Central — ventriculoperitoneal shunt

High-Yield Literature

• Shunt migration in ventriculoperitoneal shunting: A comprehensive review of literature — Harischandra LS. Neurology India 2019. PubMed
• Ventriculoperitoneal Shunt Infection — López-Sánchez C. JAMA dermatology 2020. PubMed
• Techniques and Nuances in Ventriculoperitoneal Shunt Surgery — Pillai SV. Neurology India 2021. PubMed
• The Evolution of Ventriculoperitoneal Shunt Valves and Why They Fail — Stehlik BN. World neurosurgery 2025. PubMed
• Ventriculoperitoneal Shunt-related Intrapelvic Abscess — Zenda T. Internal medicine (Tokyo, Japan) 2020. PubMed
• Ventriculoperitoneal Shunt Complications In Children: An Evidence-Based Approach To Emergency Department Management — Bober J. Pediatric emergency medicine practice 2016. PubMed
• Ventriculoperitoneal shunt — Hauk L. AORN journal 2018. PubMed
• Ventriculoperitoneal Shunt Tap Task Trainer: A Technical Report — Connors J. Cureus 2023. PubMed
• Ventriculoperitoneal shunt tap — Oakes WJ. Journal of neurosurgery. Pediatrics 2008. PubMed
• Ventriculoperitoneal shunt migration into the pulmonary artery: Case report and literature review — González-Pombo M. Neurocirugia 2023. PubMed

Curated Image Set

Open-access figures are embedded from PubMed Central articles and kept unique to this guide.

Figure 1.. The ventriculoperitoneal shunt catheter is protruding through the patient’s normal-appearing anus. Source: Spontaneous bowel perforation complicating ventriculoperitoneal shunt: a case report — Cases Journal 2009; CC BY.

Figure 2.. Plain abdominal radiography showing the ventriculoperitoneal shunt catheter within the colonic lumen. Source: Spontaneous bowel perforation complicating ventriculoperitoneal shunt: a case report — Cases Journal 2009; CC BY.

Figure 3.. Sigmoidoscopy showed the distal part of the ventriculoperitoneal shunt catheter within the sigmoid colon and the penetration site at the distal descending colon. Source: Spontaneous bowel perforation complicating ventriculoperitoneal shunt: a case report — Cases Journal 2009; CC BY.

Figure 4.. Laparotomy view: the distal part of the ventriculoperitoneal shunt catheter penetrating the sigmoid colon. Source: Spontaneous bowel perforation complicating ventriculoperitoneal shunt: a case report — Cases Journal 2009; CC BY.

Table 1.. Distribution of patients with implanted ventriculoperitoneal shunts by age and gender *-T test; X- Mean value; SD- Standard deviation; **-Chi-square test of independence Source: Complications and Outcome in Patients With Hydrocephalus Who Have Had a Ventriculoperitoneal Shunt Implanted — Medical Archives 2025; CC BY-NC.

Table 2.. Degree of disability of patients with implanted ventriculoperitoneal shunt mRS on Admission, mRS-Modified Rankin Scale; * - Chi-square test; Source: Complications and Outcome in Patients With Hydrocephalus Who Have Had a Ventriculoperitoneal Shunt Implanted — Medical Archives 2025; CC BY-NC.

Table 3.. Outcome of patients with idiopathic hydrocephalus who underwent ventriculoperitoneal shunt implantation in relation to gender * - Chi-square test; Source: Complications and Outcome in Patients With Hydrocephalus Who Have Had a Ventriculoperitoneal Shunt Implanted — Medical Archives 2025; CC BY-NC.

Figure 1. Axial computed tomography (CT) scan Shows enlargement of the ventricles (black arrows) with transependymal edema (white arrows). Source: The Intraventricular Pseudocyst as a Complication of Ventriculoperitoneal Shunt: A Rare Case Report and Review of Literature — Cureus 2021; CC BY.

Figure 2. Computed tomography (CT) scan without contrast enhancementCT scan without contrast enhancement in the sagittal (a), coronal (b), and axial (c) planes. Shows pseudocyst (white arrows)… Source: The Intraventricular Pseudocyst as a Complication of Ventriculoperitoneal Shunt: A Rare Case Report and Review of Literature — Cureus 2021; CC BY.

Figure 3. Endoscopic image Showing ventricular catheter inside the cystic cavity (black arrows). Source: The Intraventricular Pseudocyst as a Complication of Ventriculoperitoneal Shunt: A Rare Case Report and Review of Literature — Cureus 2021; CC BY.

History of Present Illness

• Chief complaint: Headaches / gait instability / urinary incontinence / cognitive decline / increasing head circumference (pediatric)
• Duration and progression:
• Hydrocephalus type:
  • Communicating: Post-SAH, post-meningitis, post-hemorrhagic (neonatal), idiopathic
  • Obstructive: Aqueductal stenosis, tumor, Chiari, Dandy-Walker
  • Normal pressure hydrocephalus (NPH): Classic triad — gait apraxia, urinary incontinence, dementia (“wet, wobbly, wacky”)
• Prior shunt history: Previous VP shunts, revisions, infections
• Prior EVD/ETV:
• NPH workup: Large-volume LP (improvement after 30-50 mL drainage supports diagnosis)

Past Medical History

• Prior shunt/revisions (dates, sides, types)
• Prior CNS infection (ventriculitis, meningitis)
• Prior abdominal surgery (adhesions affect peritoneal catheter)
• Peritoneal pathology (ascites, peritonitis, prior peritoneal catheter complications)
• Latex allergy (spina bifida patients — high rate)
• Allergies:
• Medications:

Imaging Review

CT Head

• Ventriculomegaly: Frontal horn index, temporal horn size
• Evans index: Frontal horn width / max biparietal diameter (> 0.3 = hydrocephalus)
• Periventricular lucency (acute hydrocephalus)
• Cortical mantle thickness at planned entry site
• Prior shunt hardware

MRI Brain

• Aqueductal flow void (present = patent; absent = stenosis)
• CSF flow study (cine MRI) if obstructive hydrocephalus suspected
• Underlying pathology
• For NPH: DESH (disproportionately enlarged subarachnoid space hydrocephalus) pattern

Labs

• CBC, BMP, Coags
• Type and screen
• CSF studies from LP (if recent LP done — cell count, protein, glucose, culture)

Neurological Examination

NPH Assessment

• Gait: Wide-based, magnetic, shuffling, turns en bloc
• Timed Up and Go (TUG) test: Baseline ___
• Cognition: MMSE/MoCA: ___
• Urinary: Frequency, urgency, incontinence
• Post-LP improvement (if large-volume LP performed): Gait improvement suggests shunt-responsive NPH

Surgical Planning

Case Logistics, OR Needs & Orders

• OR setup: navigation or endoscope as indicated, shunt hardware/valve setting verified, distal-access tools or general surgery help when needed, antibiotic-impregnated catheter availability, and postop imaging plan.
• Special needs: antibiotic timing, programmable valve documentation, abdominal/chest/vascular distal-site plan, CSF culture plan for revision/infection, anticoagulation plan, and EVD backup if access fails.
• Immediate postop orders: neuro checks, CT or shunt-series timing, valve setting documentation and MRI precautions, wound/abdominal/distal-site checks, infection watch, DVT timing, and follow-up for setting adjustment.

Valve Selection

• Fixed-pressure valve: Low, medium, or high pressure (set at manufacture)
• Programmable valve (preferred): Adjustable pressure setting post-op (e.g., Strata, Certas, proGAV, Codman Hakim)
  • Can adjust non-invasively if over/under-drainage occurs
  • Initial setting typically medium (e.g., 1.5 or performance level 1.5)
• Anti-siphon device / gravitational valve: Reduces overdrainage in upright position
• On/off valve: Rarely used

Position

• Patient position: Supine, head turned to the LEFT (right side up for right-sided shunt)
• Head: On horseshoe headrest or Mayfield (for navigation-guided proximal catheter)
• Right side exposed: Head, neck, chest, abdomen — all prepped in one field
• Arms: Left arm tucked, right arm on armboard or tucked

Incision Sites

1. Cranial: Right frontal (Kocher’s point) or right parieto-occipital (Keen’s point or Frazier’s point)
2. Abdominal: Small periumbilical or subcostal incision (for peritoneal catheter insertion)

Key Surgical Steps

Proximal catheter (ventricular):

1. Mark entry point (Kocher’s point: 11 cm from nasion, 3 cm from midline; OR occipital)
2. Incision (~3 cm), expose skull
3. Burr hole
4. Open dura
5. Pass ventricular catheter to 5-5.5 cm depth (target: frontal horn)
   • Aim: ipsilateral medial canthus (coronal), ipsilateral tragus (sagittal)
   • OR use navigation for guided placement
6. Confirm CSF flow
7. Connect to valve

Tunneling:

1. Subcutaneous tunnel from cranial incision to abdominal incision
   • Use shunt passer (long tunneling rod)
   • Pass behind the ear, down the neck (anterior to SCM), across the chest, to the abdomen
   • Avoid crossing midline
   • Ensure valve sits behind the ear (accessible for programming/palpation)

Distal catheter (peritoneal):

1. Abdominal incision — small (2-3 cm) periumbilical or subcostal
2. Dissect through subcutaneous tissue, fascia, muscle
3. Identify peritoneum, open carefully (avoid bowel injury)
4. Insert peritoneal catheter (~20-25 cm of tubing into peritoneal cavity)
5. Confirm distal flow of CSF through the system
6. Close peritoneal entry tightly around catheter to prevent CSF leak/hernia
7. Close all incisions

Alternative distal sites:

• Atrium (VA shunt) — for patients with abdominal pathology
• Pleural space (ventriculopleural) — less common

Critical Anatomy

1. Ventricular catheter: Same risks as EVD (cortical vessels, caudate, thalamus)
2. Great vessels in neck: Carotid, IJV — tunneling should be superficial to SCM fascia
3. Peritoneum: Bowel injury during peritoneal entry
4. Subcutaneous tunnel: Avoid skin erosion over hardware (adequate tissue coverage)

Equipment

• Shunt system (valve, ventricular catheter, peritoneal catheter, connectors)
• Valve type: [Programmable — brand and initial setting]
• Tunneling rod (shunt passer)
• Drill (twist drill or perforator)
• Navigation (optional but recommended for proximal catheter)
• Antibiotics: Vancomycin irrigation per protocol
• Antibiotic-impregnated catheter (Bactiseal or Ares — reduces infection rate)

Monitoring

• Standard ASA monitors

Anesthesia

• General endotracheal anesthesia
• Cefazolin 2g IV (some add vancomycin IV per protocol)
• Single-dose abdominal/chest prep

Potential Complications

1. Shunt infection (5-10%) — presents days to weeks post-op; treated with shunt removal, EVD, IV antibiotics, then reshunt
2. Shunt malfunction — proximal obstruction (most common), distal obstruction, valve failure
3. Over-drainage — subdural hematomas/hygromas, slit ventricle syndrome; adjust programmable valve
4. Under-drainage — persistent hydrocephalus; lower valve setting or check for obstruction
5. Peritoneal complications — pseudocyst, infection, bowel perforation (rare)
6. Hardware erosion — especially in pediatric patients with thin skin
7. Wound infection — superficial; may be managed with antibiotics vs hardware removal

Operative Note Template

Preoperative Diagnosis: [Communicating/Obstructive] hydrocephalus due to [etiology]

Postoperative Diagnosis: Same

Procedure: Right frontal ventriculoperitoneal shunt placement with [programmable valve type] set at [initial pressure setting]

[Include: ventricular catheter depth, CSF flow confirmation, valve placement, tunneling path, peritoneal entry, peritoneal catheter length, system flow confirmation]

Postoperative Plan

• Floor admission or step-down x 24 hours
• Neuro checks q2h x 24h
• CT head within 24 hours (catheter position, ventricle size)
• Abdominal X-ray (confirm peritoneal catheter position and coiling)
• Shunt series X-rays (skull, chest, abdomen) — baseline for future comparison
• Monitor for signs of over-drainage: Positional headache, subdural collections
• Monitor for signs of under-drainage: Persistent symptoms, enlarging ventricles
• Programmable valve setting: Initial setting ___ ; document for patient records and card
• MRI safety: Document valve type and MRI compatibility; most modern programmable valves are MRI-conditional but may need resetting after MRI
• Wound care: Keep dry x 48h; inspect for CSF leak, redness
• Activity: No heavy lifting x 4-6 weeks
• Educate patient/family on shunt malfunction signs
• Follow-up: 2-4 weeks clinic; CT at 3 months (new baseline ventricle size)
• NPH patients: Repeat gait assessment at 1-3 months; adjust valve if needed

Chief-Level Case Review

Use these as the senior-level mental model for Ventriculoperitoneal (VP) Shunt Placement:

• Decision point: Trajectory and hardware choice should follow the failure mode: obstruction, infection, overdrainage, loculation, slit ventricle, distal failure, or wrong pressure setting.
• Technical lever: Document the system: entry point, catheter target/depth, valve type and setting, distal site, antibiotic-impregnated hardware, and what imaging confirms placement.
• Bailout: Rescue plan is practical: poor CSF return, bloody CSF, malposition, distal access failure, abdominal/pleural complication, or inability to safely pass the catheter.
• Postop watch: Postop orders must be unambiguous: drain height/rate/max output, valve setting, clamp parameters, imaging, antibiotics, ICP/neuro checks, and overdrainage precautions.

Common Pimp Questions

Use these to pressure-test preparation for Ventriculoperitoneal (VP) Shunt Placement:

1. What is the working CSF physiology problem: obstruction, absorption failure, overdrainage, infection, or catheter failure?
2. Where exactly is the entry point, target, and backup trajectory?
3. What valve, catheter, endoscope, or navigation preference does the attending use?
4. What is the infection-prevention plan and what cultures/CSF studies are needed?
5. What postop imaging, valve setting, drainage level, and neuro-check plan should be written?

Attending Preference Variables

Items that commonly vary by surgeon or institution:

• Valve brand/setting, antibiotic catheter use, and tunneling side: [attending-specific]
• Navigation/endoscope/stylet preference and ventricular target: [attending-specific]
• CSF culture/lab routine and perioperative antibiotic duration: [attending-specific]
• Postop scan timing, EVD height or valve verification, and activity restrictions: [attending-specific]