J Korean Ophthalmol Soc > Volume 55(9); 2014 > Article
Journal of the Korean Ophthalmological Society 2014;55(9):1267-1271.
DOI: https://doi.org/10.3341/jkos.2014.55.9.1267    Published online September 15, 2014.
Orbital Morphology for Decompression Surgery in Thyroid Eye Disease Using 2-D Orbital CT and 4 Parameters.
Jong Suk Lee, Hwa Lee, Min Wook Chang, Sehyun Baek, Tae Soo Lee
1Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea. shbaek6534@korea.ac.kr
2Department of Ophthalmology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
3Nune Eye Hospital, Seoul, Korea.
갑상샘눈병증 환자의 안와감압술에서 2차원 안와 전산화 단층촬영의 4가지 parameter의 유용성
이종석1⋅이 화1⋅장민욱2⋅백세현1⋅이태수3
Department of Ophthalmology, Korea University College of Medicine1, Seoul, Korea
Department of Ophthalmology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine2, Goyang, Korea
Nune Eye Hospital3, Seoul, Korea
To present easily measurable 2D orbit computed tomography (CT) reference data that can be used in a preoperative study for orbital decompression and classification of individual orbital morphologies. METHODS: The study sample was composed of 77 patients with orbital contusion (42 Asian males + 35 Asian females = 154 orbits) who visited the emergency room of the Korea University Guro Hospital from September 2012 to June 2013. Patients with orbital wall fracture, retrobulbar hemorrhage, or eyeball rupture were excluded. Medical records including 2D orbit or facial bone CT were retrospectively reviewed and 4 orbital parameters (orbital length, OL; globe length, GL; GL/OL ratio and 2D cone angle) were measured. RESULTS: The average OL was 42.53 +/- 2.46 mm (35.63-49.09 mm) and average GL was 24.83 +/- 1.09 mm (22.75-28.13 mm). The average GL/OL ratio using these 2 parameters was 0.59 +/- 0.04 (0.50-0.68). The posterior cone angle was on average, 45.96 +/- 5.91degrees (29.35-60.04degrees). CONCLUSIONS: Simple measurement of 4 parameters using 2D orbit CT and classification of Asian individual orbital morphology may help in the choice of the most effective surgical technique for decompression surgery in thyroid eye disease patients.
Key Words: 2D orbit CT;Orbital decompression surgery;Orbital morphology;Orbital parameter;Thyroid eye disease
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