Subarachnoid Haemorrhage Flashcards
What is a subarachnoid haemorrhage?
Presence of blood within the subarachnoid space
What is the subarachnoid space?
Between the pia and arachnoid layer of the meninges.
What are the 2 classifications of causes of subarachnoid haemorrhage?
Spontaneous
Trauma
What are spontaneous causes of a subarachnoid haemorrhage?
Rupture of a berry aneurysm
Arteriovenous malformation
How does a subarachnoid haemorrhage present?
• Sudden severe onset occipital headache
• Nausea and vomiting
• Meningism- photophobia, neck stiffness
• Coma, seizure and collapse
Where would you feel a headache with a subarachnoid haemorrhage?
Occipital region
How would you diagnose a subarachnoid haemorrhage?
Non-contrast CT of head
What are the other possible ways to diagnose a subarachnoid haemorrhage?
Lumbar puncture
What would you find with a lumbar puncture of someone with a subarachnoid haemorrhage?
Xanthochromia
(yellow CSF)
When is a lumbar puncture done on someone with a SAH?
12 hours after
To allow the blood to break down
What would you use to confirm the cause/location of a SAH?
CT intracranial angiogram
What would you find on an ECG if someone has had a SAH?
ST elevation
Inverted T wave
What is the management of a SAH?
• Endovascular coiling
• Nimodipine
What is the function of Nimodipine?
Prevents vasospasm
What are possible complications of a SAH?
• Rebleeding
• Vasospasm
• Hyponatraemia