Ventriculostomy is a medical procedure that involves creating an opening in one of the brain's ventricles, which are fluid-filled spaces. This procedure is often performed to relieve pressure caused by conditions such as hydrocephalus or traumatic brain injury. A small catheter is inserted through the skull into the ventricle to drain excess cerebrospinal fluid, helping to prevent damage to brain tissue. The procedure is typically done under anesthesia and can be performed using minimally invasive techniques. Ventriculostomy allows for continuous monitoring of intracranial pressure and can be crucial in managing severe neurological conditions.