November 2012

Document Type


Degree Name



Dept. of Public Health and Preventive Medicine


Oregon Health & Science University


Introduction: Idiopathic intracranial hypertension (IIH) is a condition of raised intracranial pressure of unknown cause. Symptoms and signs include headache, pulsatile tinnitus, transient visual obscurations, papilledema, an in severe cases, visual loss and blindness. Lumboperitoneal (LP) and ventriculoperitoneal (VP) shunts are the primary surgical interventions used to treat IIH; however, LP and VP shunts frequently require multiple revisions and have a number of complications. Current information concerning the relative incidence of, and reasons for, failure in LP and VP shunts is poorly understood. Hypothesis: We proposed that at two years from first surgery, LP and VP shunts would have different incidences of failure. Additionally, we proposed that independent predictors such as BMI, lumbar opening pressure, and time from initial diagnosis to first surgery would be associated with failure. Methods: Using a retrospective cohort design and drawing a sample from the Intracranial Hyp




School of Medicine



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