Measurement of ICP (Intracranial Pressure) in the Brain

Continuous measurement of the ICP (intracranial pressure) is an invasive procedure used to determine the pressure inside the cranium. The enclosed space of the cranium limits expansion capabilities of the brain. As the volume increases in the cranium, the ICP will increase. As clinical symptoms are initially unspecific, precise monitoring of pressure within the cranium is very important. Indications for measuring the ICP are:

• Severe traumatic brain injury
• Significant subarachnoid hemorrhage
• Tumors
• Stroke
• Hydrocephalus
• Intraparenchyma and intraventricular cranial hemorrhage
• Severe meningitis
• Reye syndrome
• Polytraumatized patients
• Coma with unknown etiology

The ICP (intracranial pressure) can be measured at different locations in the brain. The NEURODUO catheter measures pressure at two separate points and was developed specifically for measurements in the parenchyma.

For measuring ICP in the parenchyma, the NEUROVENT-P catheter measures the pressure directly in the brain tissue.

Various types of ventricular catheters are available for direct measurement of pressure in the ventricles. Due to the additional drainage function of the NEUROVENT catheter, excess CSF (cerebrospinal fluid) is drained from the ventricles. The elevated ICP is also lowered by draining the CSF. Implantation of ventricular catheters is facilitated by various application tools such as a stylet or a guide wire. The NEUROVENT with Sleeve Housing is a unique design which incorporates ICP measurement in the parenchyma and CSF drainage.

To record the epidural pressure, the NEURODUR catheter is placed directly on the dura. The ICP is measured directly at the elastic dura.