•   Obstructive hydrocephalus, occurs when the flow of CSF is blocked or obstructed.
•   A small hole is made in the skull.g
•   An endoscope using small camera is guided into the brain through this hole to identify ventricular surface.
•   When ventricular surface is identified, a tiny perforation is made in the floor of third ventricle.
•   This will create a pathway for CSF and allow it to flow from the blocked ventricles into the cavities in the brain.
•   ETV restores the flow of cerebrospinal fluid in the brain.
•   After all the steps are performed, the wound will be closed with thorough care.

•   It does not leave or implant any mechanical device inside your brain
•   Risk of infection is comparatively less than shunt surgery.
•   Usually ETV is not performed in patients below 2 years old as its success rate in infants is less.

At the same time, this surgery may not be effective in all other patients with obstructive hydrocephalus.

•   Inability of brain to re-absorb CSF
•   Hole closure
•   Chance of infection, but lesser
•   Bleeding inside your brain
•   Vision problems
•   Weakness down one side of the body