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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
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
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
백승국 ( Seung Guk Baek ),윤은호 ( Eun Yun ) 전남대학교 호남학연구원 2010 감성연구 Vol.1 No.1
최근 감성이 주목되면서 감성에 대한 다양한 연구가 쏟아지고 있지만, 감성이라는 단어의 이해가 서로 상이한 경우가 많고, 외부 환경을 통한 감성작용을 무시하고 감수성으로서의 감성을 강조하는 실용적인 연구가 이루어지는 경향을 보이고 있다. 본 연구는 동양과 서양의 감성연구에 대한 흔적들을 간략하게 추적하여 한국의 감성 체계 연구에 대한 방향을 제시하고자 하였다. 감성 원형 연구차원에서 근대 조선의 이황과 이이는 주자의 심성정론을 바탕으로 각자의 고유한 감성이론을 구축하였고, 박지원은 연하일기에서 해외의 감성 연구와도 견줄 수 있는 감성에 대한 견해를 가지고 있었다. 반면 서양의 경우에는 많은 연구들이 감성의 표출 양상을 중심으로 연구되었고, 시간이 지나면서 생리학을 바탕으로 한 연구와 사회학적인 연구로 재정리되는 과정을 보여주고 있다. 그러나 현대 한국의 감성연구에는 한국과 서양의 연구들이 제대로 적용되지 못하고 있는데, 이는 실용적인 감성 연구에 중점을 두어 감성 체계 연구가 전무하기 때문이다. 따라서 앞으로 한국 감성연구의 발전을 위해서는 인문학을 기반으로 한 감성 원형 발굴과 함께 감성작용을 바탕으로 한 감성체계 연구가 필요하다. There`s many researches about "emotion-ability"(Gamsung) in korea as emotion pay attentions to koreans, but becaue firstly, the understanding for gamsung differs each other, and secondly, many articles about emotion neglects emotion works by outer milieu, and stress on gamsung as sensation, there`s a problem that no regard for researches about emotion by korean ancestors.In this article, we discussed about solution for these problems. First. we researched for research for emotion system in modern chosun era. Yi Whang and Yi I was established emotion system based of Zhu xi`s neo-confucianism, and Park Ji-won wrote about manifestation of emotion in "yeonha ilgi". Second, we researched for western studies of emotions. They researched for emotion as expression condition, and the time flows, these studies rearranged as physiological studies and socialogical studies. Nevertheless, there is not applied of oriental and western studies in the korean gamseong studies. because there is a few researches for emotion system, but many pratical researches and articles exists. thus for develop of gamsung studies, research for emotion archetype based on humanies, and studies in emotion system, that is founded on emotion works, are need.
분산형 고속전철 차량 현가장치의 주요강성이 차량진동에 미치는 영향
백승국(Seung-Guk Baek),박기수(Ki-Soo Pack),신범식(Bum-Sik Shin),이래민(Rae-Min Lee),이상원(Sang-Won Lee),구자춘(Ja-Choon Koo),최연선(Yeon-Sun Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The Korean high speed train (G7) is developed as a type of the concentrated-power train. The next generation high speed train is being under development as a type of distributed-power train. The architecture of a bogie of distributed-power train differs from the one of G7. Hence, a new architecture design is required for the distributed-power train. In addition to bogie, current EMU design should be modified for the application to the distributed-power train. It is difficult to apply making EMU to make distributed-power train. Since the current EMU is a low speed model. In this study a set of design parameter study has been performed for reduction of vibration. Although dynamics of a single power car is considered, the study result may implicate overall design strategy for next generation high speed train.
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