Intracranial pressure monitoring

Info: Intracranial pressure monitoring

Intracranial pressure monitoring uses a device, placed inside the head, which senses the pressure inside the skull and sends its measurements to a recording device.

How the Test is Performed?
There are three ways to monitor pressure in the skull (intracranial pressure).

1. INTRAVENTRICULAR CATHETER

The intraventricular catheter is thought to be the most accurate method.
To insert an intraventricular catheter, a burr hole is drilled through the skull. The catheter is inserted through the brain into the lateral ventricle. This area usually contains liquid (cerebrospinal fluid or CSF) that protects the brain and spinal cord.
The intracranial pressure (ICP) can be monitored this way. The ICP also can be lowered by draining cerebral spinal fluid (CSF) out through the catheter.
The catheter may be hard to get into place when the intracranial pressure is high.

2. SUBDURAL SCREW

This method is used if the patient needs to be monitored right away. A subdural screw or bolt is a hollow screw that is inserted through a hole drilled in the skull. It is placed through the membrane that protects the brain and spinal cord (dura mater). This allows the sensor to record from inside the subdural space.

3. EPIDURAL SENSOR

If an epidural sensor is used, it is inserted between the skull and dural tissue. The epidural sensor is placed through a burr hole drilled in the skull. This procedure is less invasive than other methods, but it cannot remove excess CSF.

Picture: Ventriculostomy

Courtesy: Medline Plus

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