What is the normal value of ICP?
For the purpose of this article, normal adult ICP is defined as 5 to 15 mm Hg (7.5–20 cm H2O). ICP values of 20 to 30 mm Hg represent mild intracranial hypertension; however, when a temporal mass lesion is present, herniation can occur with ICP values less than 20 mm Hg [5].
How does an EVD measure ICP?
ICP can be monitored via a fibre optic monitor (Codman™ microsensor) which is placed on the surface of the brain or in the brain or an external ventricular drain (EVD) system which is a closed sterile system allowing drainage of CSF via a silastic catheter tip which rests in the ventricle.
What is the purpose of a Ventriculostomy?
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.
Where is EVD placed?
The ideal location for EVD placement is the frontal horn of the right lateral ventricle, near the foramen of Monro. A left frontal location may be considered when right frontal placement is not possible owing to intracranial pathological findings.
How do you read ICP?
Intracranial pressure is measured in two ways. One way is to place a small, hollow tube (catheter) into the fluid-filled space in the brain (ventricle). Other times, a small, hollow device (bolt) is placed through the skull into the space just between the skull and the brain.
What’s EVD?
Ebola Virus Disease (EVD) is a rare and deadly disease in people and nonhuman primates. The viruses that cause EVD are located mainly in sub-Saharan Africa. People can get EVD through direct contact with an infected animal (bat or nonhuman primate) or a sick or dead person infected with Ebola virus.
How much is too much EVD drainage?
Drainage should not be turned off for longer than needed, as this can cause the catheter to block. Early signs of over-drainage include headaches, and the neurosurgical team should be notified urgently if the rate of drainage exceeds 10ml per hour or a total of more than 30ml drains in one hour (Woodward et al, 2002).
Who needs a ventriculostomy?
A summary of indications for performing ventriculostomy are as follows[4][5]: Acute symptomatic hydrocephalus – following subarachnoid hemorrhage (SAH), strokes, meningitis. Intracranial pressure (ICP) monitoring. Adjunct management for malfunctioning or infected ventriculoperitoneal shunts.
How is ventriculostomy performed?
Ventriculostomy is a neurosurgical procedure that involves creating a hole (stoma) within a cerebral ventricle for drainage. It is most commonly performed on those with hydrocephalus. It is done by surgically penetrating the skull, dura mater, and brain such that the ventricle of the brain is accessed.
Does EVD damage the brain?
Conclusion: EVD insertion, even when there are no clinically important complications, causes a tissue reaction with minimal bleedings and small areas of brain edema.
How is EVD placed?
A surgeon inserts the EVD during surgery. Once your child receives medicine to help them sleep, a healthcare provider will shave a small area of their head. The surgeon makes an opening in the shaved skin and then makes a small opening in the skull to insert the tube into a ventricle (fluid-filled area).