Papilloedema Flashcards
What is the definition of papilloedema?
Swollen optic discs secondary to raised inter cranial pressure
What is the emergency presenting with bilateral papilloedema?
Space occupying lesion.
It is a SOL until proven otherwise.
Which cranial nerve supplies the optic disc?
CN II
What 3 things should be commented on when viewing the optic disc?
Cup
Colour
Contour
Which structure puts pressure on the optic nerve, causing it to be squashed?
Subarachnoid space
What 3 things make up intracranial pressure?
Brain
Blood
CSF
What rule is in place with regards to the 3 components of intracranial pressure?
If one of the 3 increases the other two must decrease
Why can ICP cause respiratory arrest?
Brain is squeezed through the foramen magnum which causes compression of the brainstem where the medulla and pons are, which control respiration
Where is CSF produced?
Lateral ventricles in choroid plexus
How is CSF produced?
Choroidal cells secrete CSF
Where does the CSF travel to?
3rd and 4th ventricles then to the subarachnoid space
What is the function of the CSF?
Shock absorber
pH homeostasis
Exchange place for nutrients and waste products
Which cells filter blood to form CSF in the choroid plexus?
Ependydmal cells
What is the make up of CSF?
Little protein
Reduced potassium
Increased Na and Cl
What connects the third and lateral ventricles?
Intraventricular foramina of Monroe
