Echographic diagnosis of dural carotid-cavernous sinus fistulas.
I used standardized ophthalmic echography to identify specific abnormalities in four patients with low-pressure, low-flow dural arteriovenous malformations. In all of the patients, B-scan ultrasonography showed engorgement of the ipsilateral vertical vein. A-scan ultrasonography dynamically imaged rapid blood flow through the superior ophthalmic vein and enlargement of the culpable ocular muscles in patients with restrictive ophthalmopathy. The 30-degree test distinguished between venous engorgement of the optic nerve sheath and apical compression of the optic nerve by enlarged ocular muscles.
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001164:Arteriovenous Fistula / Q000000981:diagnostic imaging*; D001794:Blood Pressure; D002339:Carotid Arteries / Q000000981:diagnostic imaging*; D002426:Cavernous Sinus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009900:Optic Nerve / Q000000981:diagnostic imaging; D014463:Ultrasonography