아메드 밸브 삽입술 후 발생한 전방소실이 수술 예후에 미치는 영향

장민욱,김용연,Min Wook Chang,Yong Yeon Kim 대한안과학회 2008 대한안과학회지 Vol.49 No.8

Purpose: To evaluate the outcome following Ahmed valve implantation in patients who developed flat anterior chamber. Methods: The authors reviewed 60 eyes of 60 patients who underwent Ahmed valve implantation and divided these patients into the flat anterior chamber group (18 eyes) and the control group (42 eyes). The influence of clinical variables on the development of flat anterior chamber and the effect of flat anterior chamber on the success of Ahmed valve implantation were evaluated. Results: The preoperative intraocular pressure, age, and the incidence of neovascular glaucoma as a preoperative diagnosis were higher in the flat anterior chamber group than in the control group (p<0.05). The overall success rates for the mean follow-up period of 12 months were similar between the two groups (p>0.05). Conclusions: The development of a flat anterior chamber after Ahmed valve implantation appeared not to affect the outcome of the surgery. J Korean Ophthalmol Soc 49(8):1297-1302, 2008

당뇨황반부종에서 안구내 트리암시놀론 단독주입과 베바시주맙 병합주입의 단기 효과 비교

장민욱,김성우,오인경,오재령,허걸.Min Wook Chang. M.D.. Seoung Woo Kim. M.D.. In Kyung Oh. M.D.. Jae Ryung Oh. M.D.. Kuhl Huh. M.D.. Ph.D. 대한안과학회 2008 대한안과학회지 Vol.49 No.8

Purpose: To compare the effect of intravitreal triamcinolone injection with and without bevacizumab for diabetic macular edema. Methods: Of 69 patients (69 eyes) diagnosed with diabetic macular edema without any history of other intraocular disease or intraocular operation, 45 eyes (45 patients) were injected with intravitreal triamcinolone (4 mg) and the remaining eyes (24 patients) were injected with triamcinolone (2 mg) and bevacizumab (1.25 mg). The visual acuity and central macular thickness of treated eyes from both groups was measured using OCT, and these measurements were compared between the two groups. Results: There were no statistical differences between the two groups with respect to baseline data. Central macular thickness (CMT) was reduced in both groups, and BCVA improved in both groups. No significant differences were detected in changes in CMT or BCVA between the two groups. Conclusions: Intravitreal injection of triamcinolone had a beneficial effect on DME in terms of CMT reduction and BCVA improvement. Addition of three consecutive intravitreal bevacizumab injections, however, did not show any significant addictive effect during the follow-up period. J Korean Ophthalmol Soc 49(8):1269-1274, 2008

회전익 항공기 전륜착륙장치 단속거동 현상 개선연구

최재형,장민욱,이윤우,윤종진,Choi, Jae Hyung,Chang, Min Wook,Lee, Yoon-Woo,Yoon, Jong Jin 한국항공운항학회 2017 한국항공운항학회지 Vol.25 No.3

The Nose Landing Gear(NLG) of Rotary Wing Aircraft is an essential equipment in Landing System for pilot to perform a flight mission. It supports the fuselage at ground and absorbs the impact from the ground when landing, thereby, these functions sustain operational capability for pilot and crew. However, the A aircraft caused stick-slip behavior when it was stationed on the ground. Therefore, this paper summarizes pilot comment in operation which are classified by cause of occurrence and the troubleshooting process about each comment. It also describes design improvements which was derived from troubleshooting and suggests verification results of flight test.

눈물점 협착 환자에서 고주파 수술기구를 이용한 눈물점 성형술의 효과

권준기,장민욱,백세현,이태수,Jun Ki Kwon,MD,Min Wook Chang,MD,PhD,Se Hyun Baek,MD,PhD,Tae Soo Lee,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.12

Purpose: To introduce and assess the results of punctoplasty using a radiofrequency surgical unit for punctal stenosis. Methods: Patients who complained of epiphora, had an intact lacrimal pathway below puncti, and underwent punctoplasty with the Ellman Surgitron F.F.P.F were evaluated in the present study. Results: A total of 19 patients (31 eyes) were included in the study. The average age was 55 years (±15.7 years). At the last follow-up visit, 27 eyes (87%) had patent puncti, 1 eye became stenotic again, and 3 eyes were completely obstructed. Twenty-two eyes (71%) showed almost complete disappearance of dye on the fluorescein dye-disappearance test (FDDT). Twenty-five eyes (81%) had symptomatic improvement. No significant complication was reported postoperatively. Conclusions: Punctoplasty with a radiofrequency surgical unit is a simple and effective method for punctal stenosis.

3차원 전산화단층촬영을 이용한 안와위패임과 안와위구멍의 해부학적 위치와 모양 분포

최광언,이화,장민욱,이태수,백세현.Kwang Eon Choi. MD. Hwa Lee. MD. Min Wook Chang. MD. Tae Soo Lee. MD. Se Hyun Baek. MD. PhD 대한안과학회 2014 대한안과학회지 Vol.55 No.11

Purpose: To evaluate anatomical locations and distributions of supraorbital notch and foramen using facial 3D computed tomography in the Korean adult population. Methods: The study sample was composed of 87 adult patients with no history of trauma or ocular disease. The horizontal position of the supraorbital foramen or notch was recorded in relation to a vertical line defined by a reproducible hypothetical point, such as the nasion and mid-maxilla and the midpoint of the horizontal supraorbital plane. The distance and angle for each supraorbital foramen and notch were calculated from the defined vertical line. Furthermore, vertical distance from supraorbital plane, which was established using the highest points of both supraorbital rims, was obtained from the supraorbital foramen. Results: The mean age of the 87 patients was 45.44 ± 8.34 years (range, 30-59 years). There were 66 eyes in the supraorbital notch and 108 eyes in the supraorbital foramen. There were no distributional differences between the 2 sides. The mean horizontal distance of both types was 23.95 ± 3.93 mm (range, 16.41-38.94 mm). The horizontal distance of male patients was longer than the female patients (25.18 ± 4.16 mm vs. 22.63 ± 3.19 mm, <EM>p </EM>< 0.001, based on independent t-test) and the horizontal distance of supraorbital notch was shorter than the supraorbital foramen (22.59 ± 3.18 mm vs. 26.18 ± 4.04 mm, respectively,<EM> p</EM> < 0.001, based on independent t-test). The mean vertical distance and mean angles of the supraorbital foramen were 3.02 ± 1.119 mm and 6.81 ± 2.31 degrees (°), respectively. Conclusions: The present study described the anatomical location of each supraorbital opening type in Korean adults. According to horizontal distance, a surgeon can avoid iatrogenic injury of the supraorbital neurovascular complex, especially during brow surgery. In addition, the anatomy can aid in targeting supraorbital neurovascular complex in cases of nerve block. J Korean Ophthalmol Soc 2014;55(11):1573-1578

갑상샘눈병증 환자의 안와감압술에서 2차원 안와 전산화 단층촬영의 4가지 parameter의 유용성

이종석,이화,장민욱,백세현,이태수,Jong Suk Lee,Hwa Lee,Min Wook Chang,Sehyun Baek,Tae Soo Lee 대한안과학회 2014 대한안과학회지 Vol.55 No.9

Purpose: 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 ± 5.91° (29.35-60.04°). 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. J Korean Ophthalmol Soc 2014;55(9):1267-1271

눈꺼풀 및 결막 종양으로 처음 발현된 급성 골수성 백혈병

김동주(Dong Ju Kim),장민욱(Min Wook Chang) 대한안과학회 2016 대한안과학회지 Vol.57 No.5

목적: 급성 골수성 백혈병 환자에서 눈꺼풀 및 결막의 종양으로 처음 병발한 1예를 보고하고자 한다. 증례요약: 82세 남자 환자가 10일 전 발견된 양안 안구결막 및 위눈꺼풀의 덩어리를 주소로 내원하였다. 말초 혈액 검사에서 Hb 13.7g/dL 백혈구 수는 5,530/mm³ (중성백혈구 74.4%, 임파구 10%, 단핵구 11.8%)로 특이소견을 보이지 않았다. 이밖에 동공의 대광반사, 외안근 운동, 안저 검사에서는 이상소견을 보이지 않았다. 양안 결막 및 우측 위눈꺼풀 병변에 대해 첫 내원 1주일 후 생검을 시행하였다. 이후 호흡곤란, 발열이 생겨 시행한 말초 혈액 검사에서 Hb 9.6 g/dL, 백혈구 수는 78,020/mm³ (중성구 0%, 임파구 7%, 단핵구 5%, 전골수세포 1%, 늦골수세포 4%, 골수세포 6%, 모세포 67%)의 소견이 나타났다. 생검에서 비전형적인 형질모양의 백혈병 세포의 침윤 소견이 보였다. 급성 골수성 백혈병 진단하에 항암화학요법을 시행하였으나, 폐렴 악화로 환자는 사망하였다. 결론: 말초 혈액 검사에서 특이소견이 보이지 않더라도 결막 및 눈꺼풀에 비특이적인 병변이 보일 시 급성 골수성 백혈병에서 선행한 종양일 가능성을 염두에 두어야 한다. Purpose: To report a case of an 82-year-old male with acute myeloid leukemia presenting with bilateral isolated conjunctival and eyelid masses. Case summary: An 82-year-old male presented with a bilateral conjunctival mass and right eyelid mass occurring 10 days prior. He was diagnosed with prostate cancer 8 years ago and complete recovery was achieved using selective mass chemotherapy. He experienced a stroke 4 years ago and was treated using a carotid artery stent insertion and medication. In the initial laboratory test, hemoglobin was 13.7 g/dL and leukocyte count 5,530/mm³ (neutrophil 74.4%, lymphocyte 10%, monocyte 11.8%). Light reflex, movement of extraocular muscle and fundus examination were all normal. Biopsy was performed 1 week after the first visit. Seven days after biopsy, he complained of sudden dyspnea and febrile sense and was admitted to the intensive care unit via the emergency room (ER). The laboratory tests performed in the ER showed hemoglobin was 9.6 g/dL and leukocyte count was 78,020/mm³ (neutrophil 0%, lymphocyte 7%, monocyte 5%, promyelocyte 1%, metamyelocyte 4%, myelocyte 6%, blast 67%). The biopsy revealed diffuse proliferation of atypical plasmacytoid cells, consistent with leukemic infiltration. Under the diagnosis of acute myeloid leukemia, chemotherapy was administered. However, the patient died due to aggravated pneumonia. Conclusions: Even if non-specific findings appear on the peripheral blood tests, eyelid and conjunctival masses should be considered as possible tumors in acute myeloid leukemia.

회전익 항공기 안전 확보를 위한 주륜완충장치 결함 개선연구

최재형(Jae Hyung Choi),장민욱(Min Wook Chang),임현규(Hyun-Gyu Lim),이제석(Je Suk Lee) 한국항공우주학회 2017 韓國航空宇宙學會誌 Vol.45 No.6

회전익 항공기에 적용된 주륜완충장치는 착륙계통 장비로서 조종사의 임무 수행에 핵심적인 장비이다. 주륜완충장치는 항공기가 지상에 있을 때 동체를 지지해주며 착륙 시 지면으로부터 오는 충격을 흡수함으로서 조종사 및 병력의 작전 운용능력을 만족시킨다. 그러나 A 항공기 지상 계류 시 항공기의 비대칭 현상과 누유 현상이 발생되었다. 따라서 본 논문에서는 주륜완충장치의 운용 시 발생한 결함사항을 발생원인 별로 분류하고, 각 지적 사항에 대한 고장탐구 수행과정을 정리하였다. 또한, 고장탐구 내용을 바탕으로 도출한 설계개선 사항과 개선사항에 대한 검증 결과를 함께 기술하였다. The Main Landing Gear(MLG) of Rotary Wing Aircraft is an essential equipment in Landing System for pilot to perform a flight mission. It supports the fuselage at ground and absorbs the impact from the ground when landing, thereby, these functions sustain operational capability for pilot and crew. However, the A aircraft caused asymmetry and leakage hydraulic when it was stationed on the ground. Therefore, this paper summarizes pilot comments in operation which are classified by cause of occurrence and the troubleshooting process about each comment. It also describes design improvements which was derived from troubleshooting and suggests verification results of flight test.