Flashcards in Space Occupying Lesions Deck (41)
What forms the roof over the pituitary fossa?
What lays over the cerebellum separating it from the cerebrum?
What midline structure seperates the left and right cerebral hemispheres running from the ethmoid bone to the posterior occipital protuberance?
What is hydrocephalus?
Excessive Production, obstruction or inadequate resorption of CSF.
Between bone and dura
Extradural can also be known as?
What artery if ruptured commonly results in an extradural haemorrhage?
Middle Meningeal Artery
Between the dura and arachnoid matter
What if ruptured commonly results in a subdural haemorrhage?
Cerebral veins - falls in the elderly
Bleed into the CSF of the subarachnoid space
What if ruptured would lead to a subarachnoid haemorrhage?
Circle of willis or congenital aneurysm
A single abscess is likely to be due to?
Local extension e.g mastoiditis dental infection
Direct Implantaion e.g. skull fracture
List some causes of a local extension abscess.
Chronic ottitis media
Multiple abscesses are usually due to.
Bronchiectasis, Endocarditis, IV drug abuse
What do abscesses look like?
Central Necrosis and a fibrous capsule
Surrounded by oedema
How is an Abscess diagnosed?
Aspiration for culture and treatment
What is the golden rule of trauma?
Smaller the contact time the larger the force is applied.
What is the primary damage in brain trauma?
Irreversible injury to neurones
Is primary damage treatable?
No it is only preventable through safety measures like wearing a helmet etc
What is secondary damage in brain trauma?
Potentially treatable haemorrhage oedema etc
Why do Skalp lesions present an issue?
As they can present route of entry for infection
If a skull fracture is straight and sharp it is a...
If a linear fracture crosses a suture it is known as a..
Compound fractures are associated with...
Full thickness lacerations
Base of skull fractures are all....
Depressed fractures present a risk because..
They allow direct infection of the brain
Surface contusion and laceration of the brain is due to..
Compression of brain tissue
Basically bruising of the brain tissue
What areas of the brain are most commonly affected by contusion?
Lateral surfaces of the hemispheres
Underneath the temporal and frontal lobes
Contra coup is what?
Contusion to the brain on the opposite side to the trauma.