[Ommaya Reservoir and the External Ventricular Drainage].

Childhood hydrocephalus is a highly diverse disease caused by various factors, and most surgical treatments are performed during infancy. Despite the diversity of hydrocephalus pathologies, treatment options are limited. It is difficult for pediatric neurosurgeons to select and perform appropriate surgical procedures for neonates and infants. Treatment options for hydrocephalus are broadly divided into permanent and temporary. Permanent treatments include cerebrospinal fluid shunt and endoscopic third ventriculostomy; temporary treatment entails cerebrospinal fluid drainage using lumbar puncture and intermittent cerebrospinal fluid drainage with an Ommaya reservoir, ventricular drainage, and ventriculosubgaleal shunt. This article describes in detail Ommaya reservoir placement and ventricular drainage as representative procedures for temporarily treating hydrocephalus.