Ventriculostomy (EVD: External Ventricular Drain)

Ventriculostomy is a procedure allowing for cerebrospinal fluid (CSF) drainage from the cerebral ventricles to alleviate elevated intracranial pressure secondary to communicating or non-communicating hydrocephalus. The skull, dura mater, and brain parenchyma are penetrated to access the lateral ventricle, usually from the non-dominant lobe (the right frontal lobe in most individuals). An external ventricular drain (EVD) is a temporary catheter used for this purpose, draining CSF external to the body. This greatest risk of this procedure is infection and meningitis.