Indications for ventriculoscopic treatment of hydrocephalus: 1, obstructive hydrocephalus, obstructive hydrocephalus has a very good success rate of about 70-80% 2, incomplete obstructive hydrocephalus and traffic hydrocephalus, as well as infants and children less than 1 year old have a very low success rate, the operation needs to be cautious, some traffic hydrocephalus ventriculoscopic surgery is also effective 3, hemorrhagic and inflammatory hydrocephalus is not effective 4, within 7 months of hydrocephalus effect 5. For patients with pathological changes, the success rate is also very low, such as tumors, patients who have undergone shunts, patients who have had subarachnoid hemorrhage, or patients who have had encephalitis and significant triple ventricular floor scarring Triventricular floor fistula – complications and management; secondary hemorrhage from vascular injury; subdural hematoma; meningitis, cerebral infarction, short-term memory impairment; infection , unexplained fever; adjacent cerebral nerve injury around the fistula (hypothalamus, pituitary, optic cross, arteriolar nerve injury) Intraoperative rupture due to arterial injury or delayed hemorrhage from post-traumatic aneurysm formation.