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Updated: Oct 5, 2026
Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
[Permanent visual loss resulting from bilateral occipital infarction after shunt malfunction]
P Gimeno-Pita1, M Moros-Peña, T Guillén-Ballard
1Sección de Neuropediatría; Hospital Miguel Servet, Zaragoza, España.
Insights
Sudden shunt malfunction can cause severe neurological damage, including vision loss. Prompt neurosurgical intervention is crucial for patients with signs of increased intracranial pressure, even with normal imaging.
Area of Science:
- Neuroscience
- Ophthalmology
- Neurosurgery
Background:
- Cerebrospinal fluid (CSF) shunts are vital for managing hydrocephalus.
- Catheter obstruction is the most common shunt complication, with sudden onset posing serious risks.
Observation:
- A 13-year-old girl experienced sudden headache, altered consciousness, and vision loss post-ventriculo-peritoneal shunt insertion.
- Symptoms were linked to bilateral occipital infarct, indicating severe neurological compromise.
Findings:
- Neuro-ophthalmic signs are more sensitive than CT scans in detecting shunt malfunction.
- Elevated intracranial pressure can damage visual pathways without ventricular enlargement visible on CT.
Implications:
- Mechanical shunt failure is a neurosurgical emergency requiring immediate attention.
- Early recognition of neuro-ophthalmic signs is critical to prevent irreversible vision loss and death.
Introduction:
The commonest cause of malfunction of shunts for cerebrospinal fluid is obstruction of the catheter, which may be of subacute or sudden onset. When onset is sudden, the complication is serious as this implies risk of death or permanent damage to vision.
Clinical Case:
We describe the case of a 13 year old girl who, 8 days after insertion of a ventriculo-peritoneal shunt valve, complained of the sudden onset of headache, reduced level of consciousness, pupil changes and permanent loss of vision secondary to a bilateral occipital infarct.
Conclusions:
The visual pathways and oculomotor nerves are particularly sensitive to changes in intracranial pressure and displacement of intracranial structures. Therefore, neuro-ophthalmic signs are more sensitive than computerized tomography (CT) in detection of mechanical malfunction of the valve. Although CT shows structural anomalies, it cannot assess their function. The intracranial pressure may be high enough to cause damage to the visual pathways, although no enlargement of the ventricles can be seen on CT. A normal CT, or one similar to previous scans, does not rule out malfunction of the shunt. If clinical signs of raised intracranial pressure are observed, the possibility of mechanical malfunction of the valve should be considered and this should be explored as a neurosurgical emergency in view of the risk of death or permanent loss of vision.
