Shunt Surgeryinvolves implanting a thin tube, called a shunt, in the brain. The excess cerebrospinal fluid (CSF) in the brain runs through the shunt to another part of the body, usually the abdomen. From here the fluid is absorbed into your blood stream. The shunt has a valve inside to control the flow of CSF and to ensure it does not drain too quickly. You can feel the valve as a lump under the skin of your scalp.
Endoscopic third ventriculostomy (ETV) (Neuroendoscopic treatment)An alternative procedure to shunt surgery is an endoscopic third ventriculostomy (ETV). ETV involves making a hole in the floor of the brain, allowing the trapped CSF to escape to the surface of the brain where it can be absorbed, instead of inserting a shunt.
An ETV is not suitable for everyone. However, it could be a possible treatment option if the build-up of CSF in your brain is the result of a blockage (obstructive hydrocephalus). The CSF will be able to drain through the hole, avoiding the blockage.