External Ventricular Drainage (EVD) and ICP Monitoring

The cranial vault contains brain tissue, blood and cerebrospinal fluid (CSF). After closure of a child’s sutures, the cranial vault is similar to a rigid box. As the volume of the three components within the skull (brain matter, blood and CSF) must remain equal, an increase in one component must be accompanied by a decrease in another component. If there is not, an increase in intracranial pressure (ICP) will occur.
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.
The ventricular system produces CSF at approximately 20mL/hr (estimated at 0.35mL/min in children) by the choroid plexus in the lateral ventricles. The CSF circulates around the brain and spinal cord and is then reabsorbed via the arachnoid villi.

[@GM-ex2qm]

Thank you so much for the detailed educational video. This is one of the best and clear video about EVD. Well done....

[@ashleysheppard6404]

I needed a refresher and this was great!

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[@islamtoot4187]

This is really very helpful and one of the best videos about EVD and ICP monitoring. Thank you so much. You have gone so far with you great teaching skills :)

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Such a great video!

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Just perfect! 👏

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That was a great video!!!

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thanks for sharing

[@AbbyDonley-i4z]

What would happen if the patient stood up while connected?

[@criticalrnskills5326]

By gravity CSF will be drained ,the level should maintain the whole time if so you need to close the drain before standing

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Thabk you fornthis video

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Why it is not possible to monitor icp and drain CSF simultanously? 8:39

[@criticalrnskills5326]

you can but if you need accurate reading it should be stopped Because while reading fluids is draining so the reading will be affected

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you mean water scale?

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