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황재형,신경훈,이성기,송지선,권지원,Jae Hyeong Hwang,Kyung Hoon Shin,Sung Ki Lee,Ji Sun Song,Ji Won Kwon 대한안과학회 2012 대한안과학회지 Vol.53 No.12
Purpose: To provide a case report of 1 patient (1 eye) who experienced recurrences of conjunctival papilloma and was treated with complete resection, electrocauterization, cryotherapy, intraoperative application of mitomycin C and postoperative topical mitomycin C. Case summary: We evaluated the clinical course of a 42-year-old male with recurrent conjunctival papillomas on the left upper and lower tarsal conjunctiva who was treated 10 times with a simple resection over the past 8 years. The patient was treated with complete resection, electrocauterization, intraoperative application of mitomycin C and cryotherapy. Topical mitomycin C was applied for 1 month. There was no recurrence or complications for 12 months postoperatively. Conclusions: Complete resection, electrocauterization, intraoperative application of mitomycin C, cryotherapy and topical mitomycin C in patients with recurrent conjunctival papilloma was shown to be an effective treatment without recurrence and complications.
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황재형,정원영,Hwang, Jae Hyung,Jeong, Won Young 한국의류학회 2017 한국의류학회지 Vol.41 No.4
The helmet is an imperative personal protective equipment. This protective device must be able to guard the human head against potential risks. Helmets are classified according into the purpose of use; therefore, the required performance and specifications depend on the type of products. Military helmets are intended to protect the wearer's head from bullets and shrapnel. Generally, lightweight super fibers and fiber reinforced composite materials are used as helmet shell materials, and NIJ STD of U.S. Department of Justice is most widely used as international standard related to bulletproof helmets. Safety helmets are widely used for industrial application and sports leisure. In general, the performance of shock absorption must be ensured, and various lining systems are applied in material, design, and combination methods. Evaluation standards have also been classified and strictly controlled for each purpose; therefore, it is difficult to certify with the existing standards such as the recently developed convergence helmets. However, it is possible to launch the product through a separate national integrated certification procedure.
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황재형,나승관,유영주,김철구,김종우,김재휘 대한안과학회 2022 대한안과학회지 Vol.63 No.4
목적: 망막색소변성으로 진단된 국내 환자의 임상적 특성을 알아보고자 한다. 대상과 방법: 2014년 1월부터 2019년 12월 사이에 망막색소변성으로 최초 진단받은 환자를 대상으로 후향적 의무기록 분석을 시행하였다. 환자의 나이, 성별, 주된 소견 및 최대교정시력을 확인하였다. 추가로 후낭하백내장 여부, 빛간섭단층촬영상의 이상 소견, 시야검사, 눈전위도검사의 결과에 대한 분석을 시행하였다. 결과: 총 246명 492안을 대상으로 결과를 분석하였다. 평균 나이는 48.0 ± 16.0세였으며, 주된 주호소는 시력저하와 야맹증이었다. 평균 logMAR 최대교정시력은 0.31 ± 0.50이었으며 368안(74.8%)에서 decimal 시력이 0.5 이상이었다. 시야검사를 시행한 462안중 328안(71.0%)에서 중심 10° 이내의 시야이상이 나타났으며, 눈전위도검사를 시행한 242안에서 평균 아덴비는 1.28 ± 0.28이었다. 빛간섭단층촬영에서 유리체황반견인/망막앞막이 135안(27.4%), 낭포황반부종이 48안(9.8%), 황반의 얇아짐이 112안(22.8%)에서관찰되었다. 중심와 타원체구역 상태의 경우 온전한 상태가 222안(45.1%), 손상된 상태가 220안(44.7%), 심한 손상으로 관찰되지 않는상태가 50안(10.2%)이었다. 결론: 망막색소변성 환자들은 진단 시 0.5 이상의 시력을 보이는 경우가 많았으나 높은 빈도로 중심시야의 손상이 나타났다. 대부분의환자에서 빛간섭단층촬영상 다양한 이상 소견이 관찰되었다.
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황재형,권지원,Jae Hyeong Hwang,MD,Ji Won Kwon,MD,PhD 대한안과학회 2014 대한안과학회지 Vol.55 No.8
Purpose: To describe the characteristics of patients with pinguecula between the ages of 20 and 39. Methods: Thirty-two patients who visited our hospital between February 2013 and November 2013 for pinguecula were enrolled in the study. The clinical characteristics were evaluated by the location, size, shape, elevation, color, vascularization and the grade of pingueculae. Results: Ninety-eight pingueculae were found in the 32 patients, 58 (59.18%) pingueculae on the nasal side, and 40 (40.82%) pingueculae on the temporal side. The mean grade of pingueculae of the nasal side was 1.19 ± 0.40 and on the temporal side was 1.15 ± 0.43. Compared with the temporal side, pingueculae on the nasal side were more frequent (<em>p </em>= 0.032). The size, color, shape and vascularization of nasal and temporal pingueculae were not significantly differentiated. Medical history, tear film break-up time, Schirmer test, history of contact lens wearing, refractive surgery, occupational activity and residence were not correlated with the grade of pingueculae. However, ocular surface disease index score was correlated with the grade of nasal pingueculae (<em>p</em> = 0.01). Conclusions: The pingueculae of the nasal side were more frequent than of the temporal side in patients between 20 and 39 years of age, and dry eye disease with tear film instability was also present. The ocular surface disease index score increased with the grade of nasal pingueculae. J Korean Ophthalmol Soc 2014;55(8):1126-1131
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Correlation of Salivary Resistin Levels with Obstructive Sleep Apnea Syndrome in Pediatric Subjects
황재형,In Hye Kim,Hye Sook Lee,Dong Sun Park,박찬순 대한수면학회 2018 sleep medicine research Vol.9 No.2
Background and ObjectiveaaObstructive sleep apnea syndrome (OSAS) is considered to be closely related to systemic in ammation. Resistin levels have been demonstrated to be a measure of systemic in ammation. For children, salivary resistin (SR) sampling is an easy and pain-free meth- od for sample collection and is optimal for multiple sampling. erefore, we aimed to evaluate cor- relations among SR levels, objective polysomnography (PSG) parameters, and subjective sleep symptoms. MethodsaaFi y-six children who attended our clinic over 1 year were enrolled prospectively; these children underwent clinical evaluation, questionnaire studies, and PSG. SR was measured at 2 points: at night before PSG and in the early morning a er PSG. resultsaaThe subjects (n = 56) were divided into the control [n = 23, apnea hypopnea index (AHI) < 1] and OSAS (n = 33, AHI ≥ 1) groups. SR levels after PSG in the OSAS and control groups were similarly higher than that before PSG. ere was no signi cant di erence in SR levels between the two groups and among the control and OSAS subgroups. SR levels in the OSAS sub- groups were not related to AHI, tonsil size, AN (adenoid-nasopharyngeal) ratio, questionnaire re- sults, lowest oxygen saturation, and oxygen desaturation index (ODI). ConclusionsaaSR levels had no signi cant correlation with AHI, scores of the Korean version of modi ed pediatric Epworth Sleepiness Scale, the lowest oxygen saturation, and ODI; SR levels ex- hibited diurnal variations regardless of the presence of OSAS. However, there is no consensus re- garding the relationship between resistin levels and OSAS. Further studies should be pursued in the future.
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