망막앞막이 동반된 다발성 망막 모세혈관종에서 시행한 일차 유리체절제술 1예

백승국,진선영,이영훈,이태곤,Seung Kook Baek,MD,Sun Young Jin,MD,Young Hoon Lee,MD,Tae Gon Lee,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.6

Purpose: To report the clinical result of pars plana vitrectomy (PPV) as the primary treatment in a patient with multiple bilateral retinal capillary hemangiomas (RCH) accompanying epiretinal membrane (ERM). Case summary: A 17-year-old female patient visited our clinic for decreased bilateral vision 4 days in duration. At the first visit, the vision in her right eye was 20/25 and, 20/100 in her left eye. Bilateral multiple retinal capillary hemangiomas were observed at the peripheral retina in both eyes on fundus examination, fluorescein angiography (FAG) and optical coherence tomography (OCT). ERM and associated macular edema (ME) were noted in her left eye. For her left eye, focal laser photocoagulation (PC) was performed 6 times. ME was decreased and her vision improved to 20/25. However, 3 months after the initial visit, her vision decreased to 20/400 accompanied with exacerbated ERM and ME. Therefore, PPV was performed in her left eye. ERM and associated ME were decreased and her vision improved to 20/25 after 18 months. PPV was performed in the right eye immediately after her vision worsened (best corrected visual acuity, BCVA 20/40) and ERM occurred. After 15 months later, vision in her right eye improved to 20/20 and ERM was also decreased. J Korean Ophthalmol Soc 2014;55(6):928-935

비강상태에 따른 비내시경적 누낭비강문합술의 결과 분석

백승국,하명숙,Seung Kook Baek,MD,Myung Sook Ha,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.5

Purpose: This study evaluated the relationship of nasal cavity state and surgical results after endonasal dacryocystorhinostomy (DCR).<br /> Methods: We retrospectively analyzed 306 eyes of 204 patients between January 2007 and December 2011. The correlation between the existence of preoperative nasal cavity abnormality, postoperative nasal cavity complications after proper management of nasal cavity abnormality, and postoperative nasal cavity complications according to nasal packing material were investigated. We analyzed the success rates and the correlation between each set of factors.<br /> Results: The success rate of primary operations performed six months after tube removal was 87.3% (267/306). The success rate after secondary revision, granuloma removal and punctoplasty was 90.5% (277/306). Postoperative nasal cavity complications were inspected in 40 eyes. Of the 306 eyes, patients treated with Nasopore showed significantly more postoperative nasal cavity complications (47.8%, 32/67) than in patients treated with Merocel (3.3%, 8/239). The rate of postoperative nasal cavity complications was 8.7% in patients with normal nasal cavity, 16.7% in patients who received treatment, and 20% in patients without treatment, with significant statistical increase if the nasal cavity was abnormal (p = 0.019). The incidence of complications influenced the primary success rate (p = 0.008); however, preoperative nasal cavity abnormalities were not correlated with primary success (p = 0.479).<br /> Conclusions: In the case of endonasal DCR, preoperative nasal cavity abnormality and type of nasal packing material used did not affect the success rate but significantly affected postoperative nasal cavity complications. In conclusion, endonasal DCR with preoperative treatment of nasal cavity abnormality and Merocel packing is expected to reduce postoperative nasal cavity complications and increase patient satisfaction.<br /> J Korean Ophthalmol Soc 2014;55(5):633-639

열공망막박리의 일차수술에서 25게이지 경결막 무봉합 유리체 절제술의 임상 결과

백승국,이영훈,Seung Kook Baek,Young Hoon Lee 대한안과학회 2015 대한안과학회지 Vol.56 No.1

Purpose: To evaluate 25-gauge transconjunctival sutureless vitrectomy for primary repair of rhegmatogenous retinal detachment (RRD). Methods: We performed a retrospective study of 46 consecutive eyes of 46 patients who underwent 25-gauge transconjunctival sutureless vitrectomy to repair primary RRD. Outcome measures included single surgery anatomical success rate, final anatomical success rate, postoperative visual acuity, and surgical complications.Results: Forty eyes were phakic and six eyes were pseudophakic. Twenty-six eyes had superior quadrant retinal tear, 12 eyes had inferior quadrant tear and eight eyes had both. The mean operation time was 56.3 minutes. The single surgery anatomical success rate was 93.48% (43/46). Two eyes with recurrent retinal detachment underwent fluid gas exchange: one received barrier laser treatment in the outpatient clinic, and the other underwent reoperation; the final success rate was 100%. The best corrected visual acuity improved from 1.34 log MAR to 0.48 log MAR (p < 0.01) in macula - off patients (30 eyes) and from 0.32 log MAR to 0.07 log MAR (p = 0.279) in macula - on patients (16 eyes). Postoperative complications included wound leaking (two eyes), cataract progression (13 eyes), vitreous hemorrhage (one eye), transient hypotony (one eye), and increased intraocular pressure (seven eyes). Conclusions: Primary repair of RRD using 25-gauge transconjunctival vitrectomy resulted in an excellent final anatomical success rate and postoperative visual outcomes. J Korean Ophthalmol Soc 2015;56(1):55-61

절삭력 추정을 위한 CNC 이송계의 파라미터 식별

백승국(Seung Guk Baek),이성철(Sung-chul Lee),송창규(Chang Kyu Song),노승국(Seung Kook Roh) 한국생산제조학회 2020 한국생산제조시스템학회 학술발표대회 논문집 Vol.2020 No.12

폐경기 여성에서 나이관련황반변성과 여성 호르몬 요인과의 관계: 제5기 국민건강영양조사 자료

백승국(Seung Kook Baek),이영훈(Young Hoon Lee) 대한안과학회 2017 대한안과학회지 Vol.58 No.9

Purpose: To investigate whether endogenous and exogenous female hormone exposures were associated with risks for age-related macular degeneration (AMD) in postmenopausal women. Methods: This study included 4,479 postmenopausal females aged 45 years and older who completed the Korea National Health and Nutrition Examination Survey (KNHANES) V. The participants were divided into 4 groups: subjects with AMD, subjects without AMD, subjects with early AMD, and subjects with late AMD. Variables associated with endogenous and exogenous female hormone exposures were analyzed. Results: Among the 4,479 participants, 516 were found to have AMD and 3,963 were normal. There was no significant difference between the AMD and normal groups execpt for age in the risk analysis. Of the total 516 AMD participants, 488 had early AMD and 28 had late AMD. Women with AMD who had used oral contraceptives longer in the past had significantly higher odds of late AMD than early AMD (odds ratio [OR] = 1.013, 95% confidence interval [CI]: 1.002-1.024). Increasing number of children was also associated with decreased odds of late AMD (OR = 0.672, 95% CI: 0.506-0.893). Conclusions: These findings suggest that exposure to endogenous and exogenous female hormones may influence the risk of AMD progression. J Korean Ophthalmol Soc 2017;58(9):1066-1073

가스절연개폐장치의 전위감지 시스템에 대한 연구

최승길(Seung-Kil Cho),백승국(Seung-Kook Baek),김광호(Kwang-Ho Kim),강형부(Hyung-Boo Kang) 대한전기학회 1999 대한전기학회 학술대회 논문집 Vol.1999 No.7

안와농양과 동반된 중심망막동맥 폐쇄 1예

김영승,백승국,하명숙,Young Seung Kim,MD,Seung Kook Baek,MD,Myung Sook Ha,MD 대한안과학회 2012 대한안과학회지 Vol.53 No.10

Purpose: To report a case of rapidly progressed orbital abscess after central retinal artery occlusion. Case summary: A 60-year-old man with right periorbital pain and edema starting 3 days earlier visited the hospital. His first visual acuity was 1.0 for the right eye with peripheral edema and tenderness; severe hemorrhagic chemosis, proptosis (approximately 3 mm) and extraocular motility limitation were also observed. According to the CT findings, a 2.5 × 1 cm-sized encapsulated cystic mass was found in the right orbital cavity, along the medial orbital wall; with a diagnosis of orbital abscess, he was hospitalized with systemic antibiotic treatment and abscess drainage. On the second day of hospitalization, the best corrected visual acuity was reduced to light perception, and relative afferent pupillary defect, pale retina and cherry red spot were found. Therefore, emergent incisional drainage, optic massage, and antibiotics were given to the patient. Immediately after the surgery, the peripheral edema and proptosis improved; nevertheless, central retinal artery occlusion did not resolve and vision did not improve. Two months later, best corrected visual acuity for the right eye was counting fingers and central retinal artery occlusion showed no further improvement. Conclusions: No case report on rapidly progressing orbital abscess has been proposed in Korea to date. In the case of rapidly progressed orbital abscess, incisional drainage and antibiotics should be administered promptly. J Korean Ophthalmol Soc 2012;53(10):1523-1527

증례보고 : 안와농양과 동반된 중심망막동맥 폐쇄 1예

김영승 ( Young Seung Kim ),백승국 ( Seung Kook Baek ),하명숙 ( Myung Sook Ha ) 한국안전학회(구 한국산업안전학회) 2003 International Journal of Safety Vol.2 No.1

목적: 급격히 진행된 안와농양과 동반된 중심망막동맥 폐쇄 1예를 보고하고자 한다. 증례요약: 60세 남환이 3일 전부터 발생한 우측 안와 주위 통증 및 부종을 주소로 내원하였다. 우안 나안시력은 1.0이었으며 우안안압은 37 mmHg로 증가되어 있었고 3 mm의 우측 안구 돌출소견과 안구운동 장애를 보였다. 안와 전산화 단층 촬영에서 우측 안와내측의 2.5×1 cm 크기의 격막이 있는 낭성 종괴가 관찰되어 안와 농양 진단하에 전신 항생제 및 배농치료 위해 입원하였다. 입원2일째 우안 안압은 18 mmHg로 감소되었으나 우측 안와 주위 종창 및 발적은 지속되었고 우안 교정시력은 광각으로 감소하였으며 상대적 구심성 동공장애 및 창백해진 망막과 앵두반점 소견 관찰되어 응급 절개 배농술 및 안구마사지를 시행 후 전신 항생제 치료 유지하였다. 술 후 안와 주위 부종 및 안구돌출은 개선되었으나 중심망막동맥은 개통되지 않았으며 시력은 호전되지 않았다. 결론: 급격한 진행을 보이는 안와농양과 동반된 중심망막동맥 폐쇄의 예가 국내에선 알려진 바 없어 보고하고자 하였으며 이러한 안와 농양의 경우 절개 배농 및 전신 항생제 치료 등의 즉각적인 대처가 필요할 것으로 생각한다. Purpose: To report a case of rapidly progressed orbital abscess after central retinal artery occlusion. Case summary: A 60-year-old man with right periorbital pain and edema starting 3 days earlier visited the hospital. His first visual acuity was 1.0 for the right eye with peripheral edema and tenderness; severe hemorrhagic chemosis, proptosis (approximately 3 mm) and extraocular motility limitation were also observed. According to the CT findings, a 2.5 × 1 cm-sized encapsulated cystic mass was found in the right orbital cavity, along the medial orbital wall; with a diagnosis of orbital abscess, he was hospitalized with systemic antibiotic treatment and abscess drainage. On the second day of hospitalization, the best corrected visual acuity was reduced to light perception, and relative afferent pupillary defect, pale retina and cherry red spot were found. Therefore, emergent incisional drainage, optic massage, and antibiotics were given to the patient. Immediately after the surgery, the peripheral edema and proptosis improved; nevertheless, central retinal artery occlusion did not resolve and vision did not improve. Two months later, best corrected visual acuity for the right eye was counting fingers and central retinal artery occlusion showed no further improvement. Conclusions: No case report on rapidly progressing orbital abscess has been proposed in Korea to date. In the case of rapidly progressed orbital abscess, incisional drainage and antibiotics should be administered promptly. J Korean Ophthalmol Soc 2012;53(10):1523-1527

특발망막전막에서 유리체절제술 전후 망막층별 두께변화와 시력예후와의 관계

김민환(Min Hwan Kim),전찬양(Chan Yang Jeon),백승국(Seung Kook Baek),장영석(Young Suk Chang),이영훈(Young Hoon Lee) 대한안과학회 2017 대한안과학회지 Vol.58 No.4

목적: 특발망막전막에서 수술 전후 빛간섭단층촬영으로 망막층별 두께를 측정하고 수술 후 시력예후와의 관계에 대해 알아보고자 하였다. 대상과 방법: 단안 특발망막전막 환자 46명, 46안을 대상으로 수술 전, 수술 후 1, 3, 6개월째 스펙트럼영역 빛간섭단층촬영기로 측정이 가능한 모든 망막층들의 두께를 측정하여 수술 전 대상군의 정상안과 비교하였고, 유리체절제술 후 6개월째 두께변화를 측정하여 각 인자들과 수술 후 시력예후와의 상관관계에 대해 알아보았다. 결과: 수술 전 정상안과 비교하여 망막신경섬유층의 두께가 가장 많이 증가하였으며, 시세포층과 망막색소상피층에서는 정상안에 비해 감소하였다. 수술 후 6개월째 망막층별 두께변화는 망막신경섬유층, 신경절세포층, 내망상층, 신경절세포-내망상층, 외망상층에서 감소하였고, 시세포층은 수술 전과 비교해 증가하였다. 수술 전 망막전막안과 정상안 간 신경절세포층의 두께차이(r=0.477, p=0.008)가 수술 후 최대교정시력과 유의한 상관관계를 보였다. 결론: 수술 전 망막전막안과 정상안 간 신경절세포층의 두께차이가 수술 후 최대교정시력과 유의한 상관관계를 보였고, 두께 차이가 클수록 수술 후 시력예후가 불량했다. Purpose: In this study, we evaluated the thickness of each retinal layer using spectral-domain optical coherence tomography (OCT) and investigated the correlation between the thickness of each retinal layer and postoperative visual acuity in eyes with idiopathic epiretinal membrane (ERM). Methods: his retrospective study included 46 eyes from 46 patients with idiopathic ERM who underwent pars plana vitrectomy. Each retinal layer thickness was measured by spectral-domain OCT before operation and at 1, 3, and 6 months after operation. The thickness of each retinal layer was evaluated in the control group before the operation. We performed an analysis of the changes in thickness of each retinal layer at 6 months after operation and then investigated the correlation between the retinal layer thickness and visual improvement. Results: Preoperatively, the thickness of the retinal nerve fiber layer (RNFL) in the ERM group showed more increased compared with that in the control group, and the thickness of photoreceptors and retinal pigment epithelium were decreased compared to those in the control group. At 6 months after the operation, thickness changes were reduced at the RNFL, ganglion cell layer (GCL), inner plexiform layer (IPL), GCL-IPL complex, and outer plexiform layer, while the photoreceptor layer increased compared with the values preoperatively. Differences in the preoperative thickness of GCL between the two groups had a significant correlation with postoperative visual acuity (r = 0.477, p = 0.008). Conclusions: Differences in preoperative thickness of the GCL between the two groups had a significant correlation with postoperative visual acuity. The greater was the thickness of the GCL, the worse was the visual outcome.