After having brain surgery, the pressure of the shunt should be adjusted by the medical staff according to the amount of hydrocephalus, and should not be adjusted arbitrarily by the patient or family members. Brain shunt, also known as ventriculoperitoneal shunt, is a sterile device mainly used in ventriculoperitoneal shunt surgery for patients with various types of hydrocephalus, often punctured in the occipital angle of the lateral ventricle, to shunt excessive cerebrospinal fluid from the ventricles to the peritoneal part of the abdominal cavity, so that it can be absorbed. Brain shunts are usually categorized into low, medium, and high pressure depending on the pressure. The regulation of the cerebral shunt needs to be strictly based on the amount of hydrocephalus shown by the patient’s cranial CT. If the pressure is adjusted appropriately, it can promote the reduction or disappearance of hydrocephalus or cerebral edema, so it should not be adjusted arbitrarily, or it will lead to too much or too little pressure and have adverse consequences. Brain shunt adjustment should be operated by a doctor, not self-operated medical devices.