What are the causes of normal pressure hydrocephalus in the elderly?

summary

Normal intracranial pressure hydrocephalus (snph) is a kind of chronic hydrocephalus in adults. Ventricular enlargement but normal cerebral pressure [< 1.8kpa (180mmh2o)] is a clinical syndrome caused by many reasons. Epidemiology: the disease is only seen in the elderly, its incidence increases with age, is a unique disease of the elderly. This disease is relatively rare in clinic, but with the aging of the population, the number of patients has gradually been paid attention to. What are the causes of normal pressure hydrocephalus in the elderly? Let's talk about it

What are the causes of normal pressure hydrocephalus in the elderly?

The unknown reason may be caused by occult subarachnoid hemorrhage (SAH) or meningeal infection. Faltz and ward divided the ventricular enlargement after SAH into two phases. In the acute phase (early stage), ventricular enlargement occurred immediately after hemorrhage to within 2 weeks, accompanied by rapid deterioration of the disease, but there was usually no clinical manifestation of snph. The chronic stage (late stage) occurs at any time 2-6 weeks after bleeding, accompanied by gradual deterioration of the disease.

The more serious the degree of bleeding, the higher the incidence of snph; The reason of snph in patients with severe disease and more bleeding is likely to be the combination of intraventricular hemorrhage and the influence of arachnoid granule absorption of cerebrospinal fluid. The more times of SAH, the higher the incidence of SNPH, the two incidence rate was 38.1%.

The location of aneurysm some scholars think that the proportion of early ventricular dilatation after rupture of anterior communicating artery aneurysm is very high, but others think that it has nothing to do with the location of aneurysm. Intraventricular hemorrhage is related to SAH complicated with intraventricular hemorrhage.

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