Hydrocephalus is a collection of excess water in the brain, which is usually white and transparent, and is medically called cerebrospinal fluid. Normal pressure hydrocephalus mainly refers to intracranial pressure not exceeding 23.9 to 26.6 kPa (180 to 200 mmHg), usually due to craniocerebral injury, or subarachnoid hemorrhage, after debulking, and significant enlargement of the ventricular system seen on CT. Classification of hydrocephalus Normal pressure hydrocephalus is clinically divided into two categories, one is symptomatic, in short, the cause is relatively clear, such as cerebral hemorrhage, or encephalitis, traumatic brain injury, brain tumor resection triggered by hydrocephalus, the cause is usually relatively clear. There is another category of idiopathic normal pressure hydrocephalus, which usually occurs in elderly people over 60 years old, and the cause is not very clear. Three main signs of normal pressure hydrocephalus Normal pressure hydrocephalus is more common in clinical practice and has a higher incidence. So, what are the three main signs of normal pressure hydrocephalus? The first sign is walking impairment, which is usually manifested by walking on both feet with a large stride, and sometimes easily falling down. The second symptom is incontinence. Patients usually have no control over their bowel movements and may experience bedwetting. The third major sign is cognitive decline, which is commonly associated with poor memory, sometimes forgetting one’s own name, going out shopping and then not knowing the way home. In summary, hydrocephalus can have a great impact on a person’s normal life, and when the above-mentioned situation occurs, it is important to go to the hospital for relevant examinations in a timely manner. Normal pressure hydrocephalus examination There are usually two methods of examination for hydrocephalus, one method is to do CT, first through the head CT examination to exclude other diseases that cause hydrocephalus. Another method is to do a lumbar puncture to clarify the pressure of cerebrospinal fluid, and then take targeted treatment measures based on the measurement results. From past cases, it is important to intervene and treat hydrocephalus in a timely manner once it is detected, otherwise it can lead to intracranial hypertensive hydrocephalus with serious consequences.