Journal of Korean Society of Medical Ultrasound 1996;15(1): 109-116.
Duplex Color Doppler Sonogram of the Orbital Diseases
Kil Woo Lee, Chul Soo Kim, Won Park
Depatment of Radiology, Internal Medicine1, Yangi Hospital Department Ophthalmology2, College of Mdeicine, Hallym University
ABSTRACT
PURPOSE : To evaluate the clinical significance of the color Doppler ultrasound at glaucoma and diseasesassociated with intraocular hypertension, diabetic retinopathy, central retinal vessel occlusion, and other oculardiseases. MATERIAL & METHODS : We performed color Doppler ultrasound in 194 eyes of the 121 patients consisting of62 normal, 46 primary open angle glaucoma (POAG), 27 ocular hypertension (OH), 14 normotensive glaucoma (NTG), 13secondary glaucoma (SG), 13 proliferating diaetic retinopathy (PDR), 10 central retinal venous obstruction (CRVO),5 retinal detachment, and 4 others. The ophthalmic artery flow velocity was measured with the real time Dopplerultrasound using 5∼10 MHz linear probe. Sample volume size ranged from 1 to 1.5 mm. Angle corrections wereselected below 60 degree. Results were statistically analyzed with paired t-test. RESULTS : Mean peak systolicvelocities in the ophthalmic and central retinal arteries among 62 normal eyes were 36.4 ± 1 cm / sec and 5.9 ±0.3 cm / sec. Mean peak systolic velocities were 32.4 ± 2 cm / sec in the POAG, 35.9 ± 2 cm / sec in OH, 32.9 ±4 cm / sec in the NTG, 42.6 ± 3 cm / sec in the PDR, 36.4 ± 3 cm / sec in the SG, and 35.2 ± 3 in the CRVO. Innormal subjects, mean peak systolic velocity in ophthalmic artery was decreased with increasing age but nostatistically significant difference was seen with Paired t-test. Comparing flow velocities between the normal andthe glaucomatous lesions showed statistically no significant difference for mean peak systolic velocity. Nosignificant difference was noted between right and left eyes but significant difference between male and femalepatients with Paired t-test. Mean resistive indices were 0.73 in ophthalmic artery and 0.65 in central retinalartery. Mean sample volume settings were 3.1 cm in depth for ophthalmic artery and 2.7 cm in depth for centralretinal artery. CONCLUSION : Color Doppler ultrasonogram of the orbit could diagnose the carotid cavernous fistulaand the retinal detachment correctly. There was no significant difference between normal and glaucomatous lesionsat the speed of the ophthalmic artery and the central retinal artery statistically. Normal values of theophthalmic and central retinal arteries are considered to be very useful.
Keywords: Orbit. sonography, Orbit. color Doppler, Orbit. hypertension and glaucoma, Orbit. retinal detachment, Orbit.carotid cavernous fistula
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