In the case of a occlusive hydrocephalus, a ventriculocisternostomy is performed. Here, the base of the third ventricle is opened with the help of an endoscope in order to create a bypass circuit for the cerebrospinal fluid within the cerebrospinal fluid system. The endoscope is inserted into the cerebrospinal fluid chambers via a trepanation. The optimal entry point and trajectory are defined with the help of the navigation device. The ventricles are filled with clear cerebrospinal fluid, thereby yielding a clear view of the anatomical structures of the chambers. In rare cases, in the case of a membranous occlusion, even the aqueduct can be opened and expanded using the endoscope. Because of the higher technical complexity and higher risks, an aqueductoplasty is only performed when ventriculocisternostomy is not possible for anatomical reasons.

In the case of a occlusive hydrocephalus, a ventriculocisternostomy is performed. Here, the base of the third ventricle is opened with the help of an endoscope in order to create a bypass circuit for the cerebrospinal fluid within the cerebrospinal fluid system. The endoscope is inserted into the cerebrospinal fluid chambers via a trepanation. The optimal entry point and trajectory are defined with the help of the navigation device. The ventricles are filled with clear cerebrospinal fluid, thereby yielding a clear view of the anatomical structures of the chambers.

In rare cases, in the case of a membranous occlusion, even the aqueduct can be opened and expanded using the endoscope. Because of the higher technical complexity and higher risks, an aqueductoplasty is only performed when ventriculocisternostomy is not possible for anatomical reasons.