Pathologies

Hydrocephalus comes from the Greek word “hydro”, which means “water” and “kephale” which means “head”.  Hydrocephalus is an excessive amount of fluid, the cerebrospinal fluid

(CSF) within the brain cavities.
CSF, which circulates through the brain, plays a key role in how it works.

In the event of hydrocephalus, the drainage mechanism is no longer functional.

The result:
the cerebrospinal fluid collects around the brain and must be drained as soon as possible, by surgical intervention and by fitting a shunt which allows the excess fluid to drain away to another area of the body.

The shunt valve is one solution which helps to drain CSF however it does not cure the cause of this deadly pathology.

Furthermore, material disorders are common (40% of valves dysfunction within 2 years, 98% after 10 years, 100% after 12 years) and are impossible to foresee.

When the shunt no longer functions, CSF overdrainage or underdrainage conditions may happen and the intracranial pressure increases or decreases to a dangerous level, which is potentially life-threatening for the patient.

The only way to detect a dysfunction before symptoms appear would be to detect an abnormal intracranial pressure change which would raise the alarm. 


The continuous ambulatory measurement of the intracranial pressure proposed by Neurallys, with a tool connected to the valve, will provide non-invasive measurement of the intracranial pressure and will thereby change the lives of thousands of patients.

Sometimes, patients who are fitted with a shunt may experience the same symptoms as those of a dysfunction in the material (repetitive headaches for example), without a real diagnosis being able to be established, due to the absence of adequate and quickly accessible tools, which may lead to unnecessary and costly interventions, which are not without risk for patients.

For these patients, the device developed by Neurallys will help to reassure patients there is no dysfunction and will guide the physician towards other causes in order to better relieve the patient.