Raised ICP

Question 1

???

Answer 1

!!!!

Question 2

5 causes?

-what is sunset sign?

Answer 2

brain tumour
head injury
hydrocephalus
meningitis 
stroke

-failure of upward gaze with lots of sclera visible

Question 3

ocular symptoms of raised ICP (5)

Answer 3

transient blurred vision
loss of vision
pupillary changes
double vision
papilloedema

Question 4

what do you call the protective covering of brain and spinal chord?
-components and features (4)

Answer 4

Meninges

-Dura mater: tough, sensory supply CNV, encloses dural venous sinuses

Arachnoid mater: spidery with arachnoid granulations

subarachnoid space: circulatinf CSF and blood vessels

Pia- adheres to brain

Question 5

what is the subarachnoid space?

Answer 5

between arachnoid space and pia mater
surrounds brain and spinal chord continuously to surround and protect
contains circulating CSF

Question 6

effect of raised ICP on CNII

• pathogenesis (3)
• what is seen on opthalmoscopy
• symptoms (5)

Answer 6

-raised ICP transmitted along the subarachnoid space in the optic nerve sheath:
compresses the optic nerve
will also compress the central artery & vein of the retina

• transient visual obscurations & flickering
  blurring of vision
  constriction of the visual field
  reduced colour perception