Ventriculoperitoneal shunt overdrainage: Difference between revisions
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*CT Head necessary for shunt placement workup and overdrained ventricles | *CT Head necessary for shunt placement workup and overdrained ventricles | ||
*Patients at higher risk for subdural hematomas | *Patients at higher risk for subdural hematomas | ||
Revision as of 14:09, 26 July 2016
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
Clinical Features
- Vague symptoms of dizziness, visual distubances
- 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 overdrained ventricles
- Patients at higher risk for subdural hematomas
Management
Disposition
- Admission for shun revision versus valve adjustment