Raised ICP Flashcards
Normal ICP adults vs children vs infant
5-15
5-7
1.5-6
What is the most common cause for congenital hydrocephalus?
More causes?
Two signs of this?
Aqueductal stenosis
Arnold chiari malformation
Arachnoid cysts
NTDs
Sunsetting eyes
Enlarged head
What is a omayya reservoir?
Two internal shunt systems?
One way valve system that measures pressures to which the drain is attached.
Ventriculo-peritoneal shunt
Ventriculo-atrial shunt
Which classification of cerebral oedema involves breakdown of the BBB?
What type of fluid accumulates in this type?
What is cytotoxic caused by?
SIADH causes what type?
What is interstitial caused by?
Vasogenic
Plasma rich in plasma proteins.
Na K pump failure
Osmotic
Excessive transependymal movement of CSF (LEAK) accumulation in PERIVENTRICULAR GREY MATTER.
Two presentations of uncal herniation?
What is kernohan’s notch?
Occulomotor nerve compression
Posterior cerebral artery compression
Uncal herniation on the right for example causing compression of the left cerebral peduncle againsts the tentorium cerebelli therefore motor weakness on the IPSILATERAL side to the focal mass lesion is seen.
What is the diagnostic criteria for idiopathic Intracranial hypertension?
Lumbar puncture with opening pressure of >25mmH2O
Why is it important to position head up at about15-30 degrees?
Why could sedation, analgesia and paralysis be needed?
Improves cerebral venous drainage
Decrease metabolic demand (so does cooling the temperature)
TX OF RAISED ICP?
Mannitol
3% hypertonic saline
EVD
Decompression craniectomy
