Loading....
Coupon Accepted Successfully!

Ophthalmology

Open Flashcards

Orbit

Question
5 out of 34
 

The best treatment in cortico cavernous fistula (LQ)



A Balloon embolization
B Ligation of internal artery

C No treatment available
D Fistulectomy

Ans. A [Balloon embolization] Q

Carotid-cavernous fistula - mostly are traumatic Q (75%) and common in young men, 25% are spontaneous

Clinical features

1. Anterior­

a. Proptosis and chemosis

b. *Pulsatile proptosis associated with bruit and a thrill,

c. Increased IOP, ipsilateral severe headache

d. Anterior segment ischaemia characterized by corneal epithelial oedema, aqueous cells, and flare, iris atrophy, cataract, and rubeosis iridis

e. It leads to progressive blindness due to carotid-ophthalmic artery steal syndrome

2. Ophthalmoplegia - 60-70% of cases due to ocular motor never damage by the initial trauma. The sixth nerve is most frequently affected,.

3. Fundus - optic disc swelling, venous dilatation and Intracranial hemorrhages from venous stasis and impaired retinal blood flow.

Indication for treatment are Q:

1. Secondary glaucoma

2. Diplopia

3. Intolerable bruit or headache

4. Severe proptosis causing exposure keratopathy

5. Anterior segment ischaemia

Treatment - Q 'involving interventional radiology' involves balloon occlusion of the fistula Q

Orbit Flashcard List

34 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)