An external ventricular drain (EVD), also known as a ventriculostomy or extraventricular drain, is a device used in neurosurgery to treat hydrocephalus and relieve elevated intracranial pressure when the normal flow of cerebrospinal fluid (CSF) inside the brain is obstructed.

Jun 22, 2022 · The EVD will be set to drain CSF when the CSF pressure exceeds a certain value equal to the height of the drainage apparatus (e.g., 5-15 cm H2O). Low pressure (e.g., ~5 cm H2O) will encourage fluid drainage.

Sep 16, 2021 · Invasive ICP monitoring is most often achieved through either a: Fiberoptic parenchymal probe. EVD. The EVD has two major advantages: the ability to treat elevated ICP via CSF diversion and the ability to sample CSF. Note, though, EVDs are not the only way to accomplish CSF diversion.

Insertion of an External Ventricular Drain (EVD) is arguably one of the most common and important lifesaving procedures in neurologic intensive care unit. Various forms of acute brain injury benefit from the continuous intracranial pressure (ICP) monitoring and cerebrospinal fluid (CSF) diversion provided by an EVD.

The volume of CSF to be released is set by the physician. Classically, EVD is set to 10 mL/h, aiming to drain approximately 100–300 mL per day [ 13 ]. Then, EVD drainage is adjusted in relation to neuroimaging, underlying pathology, and ICP monitoring.

The available evidence, in the form of single-center randomized trials, suggests that an intermittent CSF drainage approach and rapid weaning of the EVD may be associated with fewer complications and shorter length of stay in patients following subarachnoid hemorrhage (SAH).

Sep 9, 2020 · EVDs are commonplace in neuro-critical care units and require standardized setup and protocols to help monitor ICP and drain CSF. EVDs are made of basic components that allow for diagnostic monitoring of ICP and therapeutic drainage of CSF.

Mar 30, 2018 · Endoscopic third ventriculostomy (ETV): treatment in which an endoscope is used to puncture a membrane in the floor of the third ventricle creating a pathway for CSF flow within the cavities in the brain.

Jan 13, 2021 · Placement of an external ventricular drain (EVD) allows cerebrospinal fluid (CSF) to drain from the ventricles to an external collecting system.

An external ventricular drain (EVD) is a thin tube that drains extra cerebrospinal fluid (CSF) from the brain. The extra fluid may be caused by illness or injury. Too much fluid raises pressure in and around the brain. An EVD helps reduce pressure in the brain to a …