Subarachnoid haemorrhage Flashcards Preview

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Flashcards in Subarachnoid haemorrhage Deck (10):
1

Definition of subarachnoid haemorrhage

Arterial haemorrhage into the subarachnoid space

2

Most common aetiology of SAH

Rupture of aneurysm at base of brain (usually circle of Willis)

3

History of subarachnoid haemorrhage (4)

Sudden onset severe headache
Nausea, vomiting, neck stiffness
Photophobia
Decreased level of consciousness

4

Signs of increased ICP (3)

Papilloedema, III or IV nerve palsy

5

What does CT typically show in SAH? (3)

Hyperdense areas in base of skull; also may see intraparenchymal/intraventricular haemorrhage

6

How can ischaemia result from SAH? (2)

Vasospasm and reduced perfusion

7

Complications of SAH (3)

Obstructive hydrocephalus
Rebleeding
Vasospasm

8

Management of SAH (3)

Angiography to locate bleeding; surgical coiling/wrapping; nimodipine post-op (calcium blocker)

9

Where might blood be seen on CT (other than within basal structures and ventricles) (2)

Within the Sylvian fissures (lateral sulcus)
Interhemispheric fissure

10

When is a lumbar puncture performed in suspected SAH and what is it looking for?

after 12 hours; zanthochromia (yellow discolouration)