eMedicine Specialties > Neurosurgery > Vascular
Caroticocavernous Fistula: Workup
Updated: May 27, 2009
Workup
Laboratory Studies
- Routine preangiography workup to evaluate coagulation and renal function prior to delivering contrast dye includes the following:
- CBC count
- Platelets
- PT and PTT
- Electrolytes
- BUN
- Creatinine
Imaging Studies
- Selective carotid angiography (see Image 2)
- Diagnostic test of choice
- Helps confirm diagnosis
- Helps determine type classification
- Provides therapeutic capability
- CT scan of orbit
- Contrast CT scan of the orbit - Helps establish diagnosis
- May demonstrate proptosis, swelling of extraocular muscles, and dilation of superior ophthalmic vein4
- Orbital ultrasound - Demonstrates same findings as CT scan
Other Tests
- Complete ophthalmologic workup includes the following:
- Visual acuity
- Pupillary function
- Intraocular pressure
- Funduscopy (direct and indirect)
- Gonioscopy
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| References |
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References
Barrow DL, Spector RH, Braun IF. Classification and treatment of spontaneous carotid-cavernous sinus fistulas. J Neurosurg. Feb 1985;62(2):248-56. [Medline].
Karaman E, Isildak H, Haciyev Y, Kaytaz A, Enver O. Carotid-cavernous fistula after functional endoscopic sinus surgery. J Craniofac Surg. Mar 2009;20(2):556-8. [Medline].
Hieshima GB, Cahan LD, Mehringer CM. Spontaneous arteriovenous fistulas of cerebral vessels in association with fibromuscular dysplasia. Neurosurgery. Apr 1986;18(4):454-8. [Medline].
Bacon KT, Duchesneau PM, Weinstein MA. Demonstration of the superior ophthalmic vein by high resolution computed tomography. Radiology. Jul 1977;124(1):129-31. [Medline].
Dandy WE, Follis RH Jr. On the pathology of carotid-cavernous aneurysms (pulsating exophthalmos). Am J Ophthalmol. 1941;24:365-385.
Debrun GM, Vinuela F, Fox AJ. Indications for treatment and classification of 132 carotid-cavernous fistulas. Neurosurgery. Feb 1988;22(2):285-9. [Medline].
Hamby WB. Carotid-cavernous fistula. Springfield, Ill: Charles C Thomas. 1966.
Newton TH, Hoyt WF. Dural arteriovenous shunts in the region of the cavernous sinus. Neuroradiology. 1970;1:71-81.
Serbinenko FA. Balloon catheterization and occlusion of major cerebral vessels. J Neurosurg. Aug 1974;41(2):125-45. [Medline].
Walker AE, Allegre GE. Carotid-cavernous fistulas. Surgery. 1956;39:411-422.
Further Reading
Keywords
caroticocavernous fistula, cc fistula, dural arteriovenous fistula, arteriovenous shunting, type A caroticocavernous fistulas, type B caroticocavernous fistulas, type C caroticocavernous fistulas, type D caroticocavernous fistulas, intracavernous vessels, intracavernous arteries, intracavernous aneurysm, fibromuscular dysplasia, Ehlers-Danlos syndrome, collagen vascular diseases, atherosclerotic vascular disease, ophthalmic venous hypertension, orbital venous congestion, proptosis, chemosis, arterialization of episcleral veins, diplopia, visual loss, III cranial nerve palsy, IV cranial nerve palsy, V cranial nerve palsy, VI cranial nerve palsy, cranial nerve paralysis, central retinal vein occlusion, retinopathy, glaucoma, bruit, headache, visual loss, intracavernous internal carotid artery, cavernous sinus, dural shunt
Workup: Caroticocavernous Fistula