팩토링영업의 법률관계

안동섭(Dong Seob Ahn) 단국대학교 법학연구소 1993 법학논총 Vol.19 No.1

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펨토초레이저를 이용한 백내장 수술과 고식적 백내장 수술에서 유효초음파시간의 비교

안동섭(Dong Seob Ahn),한상엽(Sang Youp Han),이경헌(Kyung Heon Lee) 대한안과학회 2016 대한안과학회지 Vol.57 No.2

목적: 펨토초레이저를 이용한 백내장 수술의 유효초음파시간(effective phacoemulsification time, EPT)을 고식적 백내장 수술과 비교 하고자 하였다. 대상과 방법: 펨토초레이저를 이용하여 백내장 수술을 시행 받은 군 66명 100안과 고식적 백내장 수술을 시행 받은 군 68명 100안을 대상으로 두 군 간의 평균 EPT를 비교하였으며, Lens opacities classification system (LOCS) III 분류에 따라 핵경화 정도(nuclear opacity, NO)를 NO2, NO3 및 NO4 이상으로 나누어 각 그룹 내에서 두 군 간의 EPT를 비교하였다. 또한 펨토초레이저를 이용한 백내장 수술 시, 수정체 핵분할 패턴에 따른 EPT를 비교하였다. 결과: 전체 평균 EPT는 펨토초군이 5.85 ± 4.31초, 대조군은 10.34 ± 6.61초로, 펨토초군에서 EPT가 유의하게 짧았다. 핵경화도별로 EPT를 비교하였을 때도 모든 군에서 펨토초군의 EPT가 대조군보다 유의하게 짧았으며, 핵경화도가 높을수록 그 차이가 증가하였다. 한편, 수정체 핵분할 패턴에 따라 세 군으로 나누어 EPT를 비교하였을 때 350 μm 격자형 패턴으로 시행 받은 군의 EPT가 단순 패턴 및 혼합 패턴군보다 유의하게 짧게 나타났다. 결론: 펨토초레이저를 이용한 백내장 수술은 고식적 백내장 수술보다 더 적은 초음파 에너지를 사용할 수 있었으며, 펨토초레이저를 이용한 백내장 수술에서 수정체 핵분할 패턴에 따른 EPT의 차이를 보였다. Purpose: To compare the effect of femtosecond laser-assisted cataract surgery with conventional cataract surgery on effective phacoemulsification time (EPT). Methods: This study included 66 patients 100 eyes who underwent femtosecond laser-assisted cataract surgery and 68 patients 100 eyes who underwent conventional cataract surgery. Both groups underwent phacoemulsification using pulsed ultrasound energy and EPT was evaluated. The groups were further analyzed according to preoperative Lens opacities classification system (LOCS) III grading. Patients who had femtosecond laser-assisted cataract surgery underwent lens fragmentation with quadrant, hybrid, or grid pattern and the EPT was respectively evaluated. Results: The mean EPT was 5.85 ± 4.31 seconds in the femtosecond laser-assisted cataract surgery group and 10.34 ± 6.61 seconds in the conventional group. Overall, EPT was statistically significantly lower in the femtosecond laser-assisted cataract surgery group compared to the conventional group. When the groups were analyzed according to LOCS III grading, this result was consistent for all cataract grades and the reduction in EPT was increased with the higher LOCS III grade. When the groups were analyzed according to lens fragmentation patterns, the mean EPT was lower with 350 μm grid pattern than the quadrant or hybrid pattern. Conclusions: The femtosecond laser-assisted system in cataract surgery can be an efficient cataract surgery using lower EPT compared to the conventional procedure. Additionally, significant differences were observed in the mean EPT of cataract surgery using the femtosecond laser-assisted system among the 3 lens fragmentation pattern groups.

표층황반원공에서 유리체절제술의 치료효과와 빛간섭단층촬영을 이용한 예후인자

김상원,전혜민,안동섭,윤희성,Sang Won Kim,MD,Hye Min Jeon,MD,Dong Seob Ahn,MD,Hee Seong Yoon,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To evaluate the prognostic factors that predict visual outcome after vitrectomy for lamellar macular hole using optical coherence tomography (OCT). Methods: This study included 26 eyes that underwent pars plana vitrectomy, epiretinal membrane removal, and internal limiting membrane peeling for lamellar macular hole. The maximum parafoveal thickness, maximum height and diameter of lamellar macular hole, maximum height and diameter of intraretinal splitting, thinnest foveal floor thickness, and inner segment/outer segment disruption length on preoperative OCT image were investigated for prognostic factors that predict visual outcome. Results: The mean follow-up period was 32.2 months and the mean best corrected visual acuity improved significantly after vitrectomy from log MAR 0.47 ± 0.32 to log MAR 0.23 ± 0.23. The postoperative visual acuity correlated significantly with preoperative visual acuity, thinnest foveal floor thickness and inner segment/outer segment disruption length, but not with maximum parafoveal thickness, maximum height and diameter of lamellar macular hole and maximum height and diameter of intraretinal splitting. Conclusions: The thinnest foveal floor thickness and inner segment/outer segment disruption length on preoperative OCT image were significant prognostic factors.J Korean Ophthalmol Soc 2014;55(12):1853-1859

특발성 황반전막에서 빛간섭단층촬영상의 형태학적 분류에 따른 수술 전후 망막층별 두께변화분석

김상원,박재홍,안동섭,윤희성,Sang Won Kim,Jae Hong Park,Dong Seob Ahn,Hee Seong Yoon 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To evaluate the changes in each retinal layer thickness according to preoperative optical coherence tomography (OCT) patterns after idiopathic epiretinal membrane (ERM) removal and to investigate the correlation between retinal layer thickness and visual improvement. Methods: The medical records of 63 patients (63 eyes) who underwent vitrectomy with internal limiting membrane (ILM) peeling for idiopathic ERM and followed for more than 6 months were retrospectively reviewed. The OCT images of preoperative idiopathic ERM were classified into 3 patterns being flat, convex, and concave. Then, the changes of each retinal layer thickness were compared among OCT patterns and the correlations between retinal layer thickness and visual improvement were analyzed. Results: Improvement in visual acuity was measured in the following order: concave, flat, and convex patterns. The patients with the convex pattern only showed significant improvement of visual acuity. Ganglion cell layer plus inner plexiform layer (GCL + IPL), inner nuclear layer (INL), and outer plexiform layer (OPL) thicknesses were significantly larger in preoperative ERM patients than in normal controls in the following order: convex, concave, and flat patterns. Retinal layer thickness decreased significantly in GCL + IPL and INL after surgery in convex, flat, and concave patterns, in that order. Generally, preoperative retinal layer thickness and postoperative visual acuity were not correlated. However, improvement of visual acuity was significantly related to GCL + IPL and INL thicknesses in the convex pattern and IPL thickness in the flat pattern. Conclusions: In patients with idiopathic ERM, preoperative difference in each retinal layer thickness according to preoperative OCT patterns was observed. After ERM removal, reduction of each retinal layer thickness and specific retinal layer related to visual improvement was different according to preoperative OCT patterns.J Korean Ophthalmol Soc 2014;55(12):1843-1852

실패한 누낭비강연결술에서 내시경적 재개통술 시 실리콘관 삽입 수에 따른 수술효과

전혜민(Hye Min Jeon),안동섭(Dong Seob Ahn),노주헌(Joo Heon Roh) 대한안과학회 2015 대한안과학회지 Vol.56 No.5

목적: 코눈물관 폐쇄 환자에서 일차 누낭비강연결술의 실패원인을 분석하고 내시경적 누낭비강연결 재개통술 시 실리콘관 삽입 수에 따른 수술효과에 대해 알아보고자 하였다. 대상과 방법: 코눈물관 폐쇄로 진단받고 일차 내시경적 누낭비강연결술 후 실패하여 2007년 3월부터 2012년 12월까지 본원에서 재개통술을 받은 환자 67명 70안을 대상으로 하여 실패 원인, 첫 수술 후 수술실패 진단까지의 기간을 조사하였다. 재개통술은 비강내시경과 누소관경유 다이오드 레이저를 이용하여 육아종제거, 막제거, 비강내 협착해리와 함께 한 개 또는 두 개의 실리콘관 삽입술을 시행하였으며, 삽입한 실리콘관 수에 따른 술 후 성공률을 비교하였다. 결과: 일차 누낭비강연결술 후 실패가 진단되기까지 평균기간은 4.6개월이었으며, 실패원인으로 육아종 형성이 35안(50%)으로 가장 흔하였고, 막성폐쇄가 23안(32.9%), 비강내 협착이 7안(10%), 기능적 폐쇄가 5안(7.1%)이었다. 45안은 한 개의 실리콘관(A군)을, 25안은 두 개의 실리콘 관(B군)을 삽입하였고, 1개 실리콘 관을 삽입한 A군의 성공률은 77.8% (35/45안), 2개 실리콘 관을 삽입한 B군의 성공률은 80.0% (20/25안)였다(chi-square test, p=0.828). 결론: 실패한 누낭비강연결술에서 다이오드 레이저를 이용한 내시경적 재개통술 시 두 개의 실리콘관 삽입은 추천하지 않는 방법이다. Purpose: To evaluate the causes of failed dacryocystorhinostomy (DCR) and the effects of transcanalicular diode laser-assisted endonasal revision surgery according to the number of silicone tubes. Methods: Sixty-seven patients (70 eyes) who underwent revision surgery using transcanalicular diode laser for failed primary en-donasal DCR at Sungmo Eye Hospital between March 2007 and December 2012 were studied retrospectively. The causes of failed DCR and the time of recurrence were evaluated. The revision surgeries were endoscopic removal of granuloma and mem-brane and synechiolysis with intubation of 1 or 2 silicone tubes. We compared the results of revision surgery with 1 silicone tube and 2 silicone tube intubations. Results: Recurrence occurred after a mean duration of 4.6 months following the first DCR. The causes of surgical failure were granuloma (35 eyes), membranous obstruction (23 eyes), synechia (7 eyes), and functional obstruction (5 eyes). We performed revision surgery with 1 silicone tube intubation in 45 eyes (group A) and 2 silicone tube intubations in 25 eyes (group B). The final success rates in groups A and B were 75.6% (34/45) and 84% (21/25), respectively (chi-square test, p = 0.828). Conclusions: Transcanalicular diode laser-assisted endonasal revision surgery with 2 silicone tubes is not recommended. J Korean Ophthalmol Soc 2015;56(5):651-655

세 가지 유형의 삼출성 나이관련황반변성에서 빛간섭단층촬영의 특징 비교

안소은(Soh Eun Ahn),안동섭(Dong Seob Ahn),양헌(Heon Yang),윤희성(Hee Seong Yoon) 대한안과학회 2016 대한안과학회지 Vol.57 No.7

목적: 한 번도 치료 받지 않은 삼출성 나이관련황반변성 환자에서 전형적삼출성나이관련황반변성(typical neovascular age-related macular degeneration [nAMD]), 결절맥락막혈관병증(polypoidal choroidal vasculopathy, PCV), 망막혈관종성증식(retinal angiomatous proliferation, RAP) 세 가지 하위분류에 따른 빛간섭단층촬영의 특징을 비교하고자 하였다. 대상과 방법: 치료 기왕력이 없는 삼출성 나이관련황반변성 환자 153명 153안을 대상으로 하였다. 깊이증강모드 빛간섭단층촬영을 이용하여 진단 시점에서의 중심하 맥락막두께와 중심망막두께를 측정하고 망막내낭포액, 망막하액을 비롯한 구조적 특징들을 확인하였다. 전체 환자군을 전형적 nAMD, PCV, RAP 세 그룹으로 나누고 특징들을 비교하였다. 결과: 총 153안 중에서 typical nAMD가 74안, PCV가 55안, RAP가 24안이었다. 연령과 최대교정시력은 그룹별 유의한 차이를 보이지 않았다. 중심하 맥락막두께는 PCV가 가장 두껍고, typical nAMD, RAP 순서로 얇은 두께를 보였으며 통계적으로 유의한 차이를 보였다(p<0.001). RAP에서 다른 두 군에 비해 유의하게 두꺼운 중심망막두께(p=0.004)와 높은 빈도의 망막내낭포액의 존재(p<0.001)를 보였다. 결론: 삼출성나이관련황반변성은 세 가지 유형에 따라 서로 다른 빛간섭단층촬영의 특징을 보였다. PCV는 가장 두꺼운 맥락막두께를 보였고, RAP는 가장 얇은 맥락막두께와 두꺼운 중심망막두께, 그리고 높은 빈도의 망막내낭포액을 보였다. 삼출성나이관련황반변성을 유형별로 감별진단하는 데 빛간섭단층촬영의 특징 분석이 도움이 될 것으로 보인다. <대한안과학회지 2016;57(7):1093-1101> Purpose: To compare the characteristics of optical coherence tomography in eyes with treatment-naïve typical neovascular age-related macular degeneration (typical nAMD), polypoidal choroidal vasculopathy (PCV), and retinal angiomatous proliferation (RAP). Methods: One hundred fifty-three eyes newly diagnosed with exudative AMD were retrospectively collected. All study eyes were classified into three subtypes: typical nAMD, PCV, and RAP. Subfoveal choroidal thickness (SFCT) was measured using enhanced depth imaging optical coherence tomography (EDI-OCT). Central macular thickness (CMT) and other OCT features including intraretinal cystoid fluid and subretinal fluid were also evaluated in all eyes. SFCT, CMT and other OCT features were compared among the three subtypes of exudative AMD. Results: Seventy-four eyes with typical nAMD, 55 eyes with PCV, and 24 eyes with RAP were included. SFCT was significantly thickest in PCV and thinnest in RAP (p < 0.001). RAP showed the thickest CMT and the highest frequency of intraretinal cystoid fluid (p = 0.004, p < 0.001, respectively). Conclusions: In patients with exudative AMD, different characteristics of OCT were observed according to the three subtypes. Identification of OCT characteristics could help differentiate the subtypes of exudative AMD. J Korean Ophthalmol Soc 2016;57(7):1093-1101

株式 買受請求權

安東燮 단국대학교 경영대학원 1984 經院論叢(壇國大學校) Vol.4 No.-

株式會社企業의 總會活性化方案에 관한 考察 : 株主提案權을 中心으로

安東燮 단국대학교 경영대학원 1983 經院論叢(壇國大學校) Vol.3 No.-

1970年代의 大法院判決硏究(Ⅱ) : 商行爲篇 Transaction Provisions

安東燮 단국대학교 1981 論文集 Vol.15 No.-

화물유통업의 법률관계

안동섭 단국대학교 법학연구소 1994 법학논총 Vol.20 No.1