Table of Contents
Where is ventricular catheter placed?
The placement of a ventricular catheter, or shunt tube, is a minimally invasive procedure in which a tube made of flexible plastic or silicone is placed in one of the brain’s ventricles. Cerebrospinal fluid (CSF) is the clear liquid surrounding the brain and the spinal column.
Where is the EVD inserted?
The external ventricular drain (EVD) is a small tube surgically inserted into the ventricles of the brain, which drains cerebrospinal fluid (CSF) (Fig. 1-12). The tube is connected to a device that measures the amount of this fluid.
Where can you zero EVD?
The zero reference point for an EVD is level with the Intraventricular Foramen (Foramen of Munro), located at the beginning of the third ventricle.
How is EVD inserted?
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).
What is an EVD tube?
An external ventricular drain (EVD) is a temporary method that uses gravity to drain cerebrospinal fluid (CSF) out of compartments in the brain, called ventricles, via a thin tube that goes out of the head into a chamber and bag.
Why do we zero the EVD at the tragus?
‘Zero’ level defined by the tragus of the ear (at FORAMEN OF MAGENDIE) The objective is to use a ventriculostomy catheter and the EVD system to remove excess CSF and maintain normal CPP, while avoiding a rapid drop in ICP, which could cause re-bleeding.
How do you collect CSF from EVD?
Obtain 1 – 2 ml of CSF….Clamp The Catheter for Five Minutes
- Perform hand hygiene.
- Open the outer wrap of the sterile towel.
- Don clean gloves.
- Identify the CSF sampling port (red end)
- Identify the slide clamp on either side of the CSF sampling port.
Where should I level EVD?
Levelling the EVD system The laser level device should be in line with the patient’s Foramen of Monro (FOM). If the patient is supine with their head neutral, level the EVD system to the tragus of the ear. If the patient is lateral, level the EVD to the mid sagittal line (between the eyebrows).