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Optic Neuritis: Evaluation with Orbital Doppler Sonography¹

Kamil Karaali, MD, Utku enol, MD, Hülya Aydn, MD, Can Çevikol, MD, Ali Apaydn, MD and Ersin Lüleci, MD

¹ From the Departments of Radiology (K.K., U.S., C.C., A.A., E.L.) and Neurology (H.A.), Akdeniz University School of Medicine, 07070 Antalya, Turkey. From the 2001 RSNA scientific assembly. Received November 27, 2001; revision requested February 8, 2002; revision received April 17; accepted June 3. Address correspondence to K.K. (e-mail: karaali@med.akdeniz.edu.tr).

PURPOSE: To evaluate orbital blood flow velocities with Doppler sonography in patients with acute unilateral optic neuritis.

MATERIALS AND METHODS: Orbital Doppler sonography was performed in 20 patients with acute unilateral optic neuritis. Optic neuritis was diagnosed by a neurologist on the basis of clinical presentation, presence of decreased visual acuity, and assessment of visual evoked potentials. The peak systolic and end diastolic velocities and the resistive index were measured in the ophthalmic and central retinal arteries of both orbits. The values obtained from affected and unaffected orbits were compared by using the paired t test.

RESULTS: The peak systolic and end diastolic velocities in the ophthalmic artery were significantly increased in the affected orbits (for peak systolic velocity P < .001, for end diastolic velocity P < .05). Resistive indexes in the ophthalmic arteries did not differ (P > .05). The difference between the peak systolic and end diastolic velocities and resistive indexes in the central retinal arteries of affected and normal eyes was not statistically significant (P > .05).

CONCLUSION: Peak systolic and end diastolic velocities in the ophthalmic artery are increased in patients with acute optic neuritis.

© RSNA, 2003

Index terms: Arteries, opthalmic, 1724.91 • Blood, flow dynamics, 1724.91 • Nerves, optic, 144.20 • Neuritis, 144.20 • Orbit, US, 1724.12983, 1724.12984 • Ultrasound (US), Doppler studies, 1724.12983, 1724.12984