Ventriculoperitoneal shunt overdrainage: Difference between revisions
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==Background== | ==Background== | ||
*Overdrainage | *Overdrainage → tissue occluding the orifices of the proximal shunt apparatus | ||
**As pressure increases the occluding tissue diesengages allowing drainage to resume | **As pressure increases the occluding tissue diesengages allowing drainage to resume | ||
**Leads to cyclic increased ICP complaints that worsen when patient stands | **Leads to cyclic increased ICP complaints that worsen when patient stands | ||
**Newer valve devices with antisiphon features make this less common | **Newer valve devices with antisiphon features make this less common | ||
*Also known as "slit ventricle syndrome" | |||
==Clinical Features== | ==Clinical Features== | ||
*Vague symptoms of dizziness, visual | *Vague symptoms of [[dizziness]], [[visual disturbances]] | ||
*Worsened with standing/exertion | *Worsened with standing/exertion | ||
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==Evaluation== | ==Evaluation== | ||
*CT | *[[CT head]] necessary for shunt placement workup and over-drained ventricles | ||
*Patients at higher risk for subdural hematomas | *Patients at higher risk for [[Subdural hematoma|subdural hematomas]] | ||
[[File:Slitvent.png|thumb]] | [[File:Slitvent.png|thumb]] | ||
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==See Also== | ==See Also== | ||
*[[Ventriculoperitoneal shunt problems]] | |||
*[[CSF Studies]] | |||
==External Links== | ==External Links== | ||
Latest revision as of 19:49, 11 February 2021
Background
- Overdrainage → tissue occluding the orifices of the proximal shunt apparatus
- As pressure increases the occluding tissue diesengages allowing drainage to resume
- Leads to cyclic increased ICP complaints that worsen when patient stands
- Newer valve devices with antisiphon features make this less common
- Also known as "slit ventricle syndrome"
Clinical Features
- Vague symptoms of dizziness, visual disturbances
- Worsened with standing/exertion
Differential Diagnosis
Ventriculoperitoneal shunt problems
- Ventriculoperitoneal shunt obstruction
- Ventriculoperitoneal shunt overdrainage (Slit Ventricle Syndrome)
- Ventriculoperitoneal shunt infection
- Ventriculoperitoneal shunt mechanical failure
Evaluation
- CT head necessary for shunt placement workup and over-drained ventricles
- Patients at higher risk for subdural hematomas
Management
- Neurosurgery consult
Disposition
- Admission for shunt revision versus valve adjustment