Ventriculitis, Cerebral

The principal objective of this study is to compare the incidence of ventriculostomy related infections (VRIs) in patients who receive twenty-four hours of antibiotics, beginning no more than sixty minutes prior to EVD placement, to the incidence of VRIs in patients who also receive a pre-procedural dose of antibiotics with continued dosing of antibiotics for the duration of the external ventricular drain (EVD). At this time, the duration of prophylactic antibiotic use with antibiotic impregnated EVDs is unknown.