Hydrocephalus is, in fact, an excessive accumulation of cerebral crest fluid in the skull. Brain crest fluid is a colorless and clear fluid filled in the ventricular system, the central canal of the crestal medulla and the subarachnoid space, which plays very important roles for the central nervous system, such as buffering, protection, nutrition, transportation of metabolites and maintenance of normal intracranial pressure, so brain crest fluid is essential. However, there is a certain amount of brain crest fluid and it should not be too much. Under normal circumstances, the brain crest fluid is in a balanced state of constant production, circulation and reflux. However, when suffering from certain craniofacial disorders, this balance of cerebral crest fluid may be disturbed, resulting in excessive secretion of cerebral crest fluid or impaired absorption and circulation, resulting in an increase in the amount of cerebral crest fluid in the skull, leading to enlargement of the ventricular system or enlargement of the subarachnoid space. Hydrocephalus can seriously affect the neurological function of the brain and cause a series of symptoms. Typical symptoms include headache, vomiting, blurred vision, edema of the optic nerve papillae, occasional diplopia, vertigo and seizures, and in severe cases, the patient’s life may be at risk. Therefore, once you have hydrocephalus, you should seek medical treatment in a timely manner. The common clinical treatment for hydrocephalus is a cerebral crest fluid shunt, which is a surgical procedure in which excess water (cerebral crest fluid) from the ventricles of the brain is diverted to other parts of the body to be absorbed. This is usually done to the abdominal cavity, which has a large absorption area and can absorb this excess water. If the abdominal cavity is not in good condition, it can also be considered to be diverted to the heart or chest. How long does a hydrocephalus shunt last? Depending on the patient’s condition and the material used, the shunts can last for different periods of time, most of them for more than a decade or even longer.