Haemorraghe Flashcards
What shape do the following form:
- Subdural
- Extradural
- Subarachnoid
Subdural - crescent moon shape - follows the shape of the brain
Extradural - biconcave shape
Subarachnoid - area of blood pooling around affected artery
What is the pathology of a subdural haemorraghe?
Rupture of the bridging veins - these are the veins that go from the subarachnoid space to the dura mater
What can cause a subdural haemorraghe to occur?
Brain trauma
Old age - atrophying brain means bridging veins are weakened
In what time frame would you expect to see a subdural?
Collapse initally
Then over next week days to weeks - low pressure in bridging veins so slow to bleed out
What is the first line of management
What is the choice of imaging?
CT WITHIN 1HR
What can cause a extradural?
Where is the most common site?
What is the pathology?
Rupture of meningeal arteries that run through the dura mater
Pterion - weak spot where temporal, frontal, sphenoid and parietal bones join
Trauma - slipping out the tub
What haemorraghe can cross suture lines?
Subdural
Extradural can’t because of how tight dura mater is found to skull at points
Acutely subdural appears white on CT, what happens to this appearance when it becomes chronic?
Becomes darker in colour
Acutely subdural appears white on CT, what happens to this appearance when it becomes chronic?
Becomes darker in colour
What is a Berry Aneurysm?
Outpouching of one of the blood vessels in the Circle of Willis
Majority found in the anterior part
What are the 3 causes of subaranchoid hemorraghe?
- Brain trauma
- Aneurysms
- Arterialvenous malformations
Why are subaranchoid so dangerous?
They can cause reduction in blood to brain tissue -> ischaemia
If it occurs in Circle of Willis - obstruct CSF production -> hydrocephalus
What kind presents stroke like?
Subarachnoid
What is associated with ‘thunderclap’ headache?
Subarachnoid
