Orbital Doppler Evaluation of Blood Flow Velocities in Optic Neuritis

• 발행기관: 대한안과학회
• 저자명: Mehdi Karami Mohsen Janghorbani Alireza Dehghani Maryam Riahinejad
• 간행물 정보: 『The Korean Journal of Ophthalmology』Vol.26 No.2, 116~122쪽, 전체 7쪽
• 주제분류: 인문학 > 역사학
• 파일형태: PDF
• 발행일자: 2012.04.30

영문 초록

Purpose: To evaluate orbital blood flow velocities and optic nerve diameter with Doppler and gray-scale sonography in patients with acute unilateral optic neuritis (ON). Methods: Orbital Doppler and gray-scale sonography was performed in 46 eyes of 23 patients aged 19- to 47-years with acute unilateral ON. ON was diagnosed by an ophthalmologist on the basis of clinical presentation, presence of decreased visual acuity and assessment of visual evoked potentials. The peak systolic velocity(PSV) and end-diastolic velocity (EDV), as well as the resistance index (RI) and pulsatile index (PI) of the ophthalmic artery (OA), central retinal artery (CRA), posterior ciliary arteries (PCAs) and optic nerve diameter were measured in both eyes. We compared results from affected and unaffected eyes using the paired t-test. The area under the receiver operating characteristic (ROC) curves was used to assess the diagnosis of ON based on measured blood flow parameters of the OA, CRA and PCAs and optic nerve diameter. Results: The mean (standard deviation) optic nerve diameter in eyes with ON was 4.1 (0.8) mm, which was significantly larger than the 3.0 (0.4) mm diameter measured in unaffected control eyes (p < 0.001). There were no differences in average PSV, EDV, RI, or PI of the OA and CRA between affected and unaffected eyes (p > 0.05). The mean RI in the PCAs was slightly lower in the eyes with ON than in the contralateral eyes (0.60 vs. 0.64, p < 0.05). The area under the ROC curves indicated that optic nerve diameter was the best parameter for the diagnosis of ON. Conclusions: Optic nerve diameter was related to ON, but orbital blood flow parameters were not.

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키워드

Blood flow parameters Doppler sonography Ophthalmic artery Optic neuritis