Cavernous sinus fistula

Question 1

CSF why?

Answer 1

Abnormal communication between internal and external carotid system, which forms a fistula
* Raised pressure from arterialisation of the orbital venous system and ocular hypoxia + proptosis + pulsating eye + can hear wooshing sounds (Bruit) of blood to eye

Question 2

features of CSF

Answer 2

Features of CSF:
* VA Loss
* Proptosis
* Red eye
* Bruit – pulsation of the fistula
* Ocular Motor Nerve Palsies