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김지원,김윤택,Ji Won Kim,Yun Taek Kim 대한안과학회 2014 대한안과학회지 Vol.55 No.6
Purpose: To evaluate changes in subfoveal choroidal thickness in patients with malignant hypertension. Methods: A total of 12 eyes of six malignant hypertension patients were included in the present study. Intraocular pressure, blood pressure (systolic and diastolic), and choroidal thickness were measured before and after blood pressure control. Choroidal thickness was measured using enhanced depth imaging optical coherence tomography (EDI-OCT). The changes in choroidal extravascular density of the EDI-OCT image after blood pressure control were evaluated by comparing brightness values obtained with Adobe Photoshop software. Results: The subfoveal choroidal thickness (SFCT) of malignant hypertension patients was 412.63 ± 66.55 μm (mean ± SD), which was thicker than in normal patients. After blood pressure control, SFCT decreased significantly to 356.96 ± 59.08 μm (mean ± SD) (<em>p</em> = 0.002). The choroidal extravascular density of the EDI-OCT image decreased after blood pressure control (<em>p</em> = 0.002), and the mean change was 17.21 ± 7.56. Conclusions: The choroid is thickened in patients with malignant hypertension, and its thickness decreases after blood pressure control. This suggests that changes in blood pressure may affect choroidal thickness. J Korean Ophthalmol Soc 2014;55(6):840-846
최연정(Yeon Jung Choi),김윤택(Yun Taek Kim) 대한안과학회 2015 대한안과학회지 Vol.56 No.11
목적: 내경정맥 혈전증(Internal juglar vein thrombosis) 환자에서 나타난 안압 상승에 대하여 피부 경유혈관성형술 후 안압이 정상화 된 1예를 경험하였기에 이를 보고하고자 한다. 증례요약: 58세 남자 환자가 당뇨 망막병증으로 정기 검진을 위해 본원 안과에 내원하였다. 내원 당일 측정된 안압은 우안 30 mmHg, 좌안 28 mmHg였으며, 세극등 현미경으로 시행한 전안부 검사상 결막 부종, 충혈 및 경도의 각막 부종이 관찰되었고 전방각경 검사상 개방각 소견을 보였다. 1달 전부터 시작된 안면 부종을 관찰할 수 있었고, 환자는 2달 전 시행한 경부 전산화단층촬영에서 우측 내경 정맥 혈전증과 좌측 내경정맥 및 완두정맥 폐쇄를 진단 받았다. 이에 대해 피부경유혈관성형술(percutanoeus transluminal angioplasty)을 시행 받았으며, 시술 후 4일째 골드만압평안압으로 우안 15 mmHg, 좌안 12 mmHg로 안압은 정상화되었고 이후 안압 하강제 없이도 정상 안압이 유지되었다. 결론: 내경정맥 혈전증(Internal jugular vein thrombosis) 환자에서 안압 상승 가능성에 대해 염두에 두어야 할 것이다. Purpose: To report a case of elevated intraocular pressure (IOP) caused by internal jugular vein thrombosis. Case summary: A 58-year-old male diagnosed with diabetic retinopathy visited our clinic for a regular checkup. On ophthalmic examination, IOP was 30 mm Hg in the right eye and 28 mm Hg in the left eye. Slit lamp examination showed chemosis, con-junctival injection and slight corneal edema in both eyes. Additionally, gonioscopic examination showed open angle. We ob-served face edema that started 1 month prior and he was diagnosed with internal jugular vein thrombosis on the right side, in-ternal jugular vein and innominate vein stenosis on the left side approximately 2 months ago. The patient underwent percuta-noeus transluminal angioplasty for dilating stenosed vessel. Four days after the procedure, his IOP was 15 mm Hg in the right eye and 12 mm Hg in the left eye based on Goldman applanation tonometer and was well maintained. Conclusions: Internal jugular vein thrombosis on both sides can cause an increase in IOP.
조지룡(Ji Ryong Cho),홍상표(Sang Pyo Hong),김근오(Geun Oh Kim),김윤택(Yun Taek Kim) 한국전산유체공학회 1999 한국전산유체공학회 학술대회논문집 Vol.1999 No.-
In this study steady state solutions of cavity flows driven by two moving walls are studied. The north and east walls of the cavity are movable where as the remaining two walls are fixed in space. Numerical experiments for three different driving schemes for moving walls are done at two different Reynold. numbers of Re=40 and 400. The first scheme is to accelerate north and east walls simultaneously. In the second one, the north wall is started first and the east wall is accelerated later. In the third one the east wall starts first. It is usually expected that all these three cases yield the same steady state solution after sufficiently long time. However, present numerical experiments show that such a usual belief is valid only when the Reynolds number is low enough (Re=40). At higher Reynolds number (Re=400), the flow develops to three different steady states depending on the history of the boundary condition change.