hydrocephalus Flashcards
what
excessive volume CSG within ventricular system
features
symptoms of raised ICP
- headache
- N&V
- papilloedema
- coma
in infants - increase head circumference
infants w suture which are not fused
increased head circumference
open anterior fontenelle with bulge and become tense
categories of hydrocephaluus
obstructive and non-obstructive
obstructive hydrocephalus
due to structural pathology blocking flow of CSF
dilation of ventricular system superior to site of obstruction
obstructive hydrocephalus - causes
tumours
acute haemorrhage
development abnormalities e.g. aqueductal stenosis
non-obstructive hydrocephalus
imbalance of CSF production and absorption
non-obstructive hydrocephalus - causes
inc production CSF e.g. choroid plexus tumoru
failure of reabsorption
- meningitis
- post hameorrhagic
Ix
CT fisrt line
LP is diagnostic and therapeutic
when is LP contraindicated
obstructive hydrocephalus
difference in pressured induced by CSF drainage will cause brain herniation
Mx - acute
external ventricular drian
Mx - long term
ventriculoperinal shunt
surgery if obstructive
normal pressure hydrocephalus
reversible cause of dementia
2ry to reduced CSF absorption at arachnoid villi
- head injury
- SAH
- meningitis
normal pressure hydrocephalus - classic triad
urinary incontinence
dementia
gait abnormality
normal pressure hydrocephalus - Mx
ventriculoperitoneal shunting
