http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
상대정맥증후군 환자에서 발생한 안허혈에 의한 신생혈관녹내장 1예
전지훈,조경진,장기철,장무환,Ji Hoon Jeon,MD,Kyong Jin Cho,MD,Ki Cheol Chang,MD,PhD,Moo Hwan Chang,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.9
Purpose: To report a case of neovascular glaucoma (NVG) with ocular ischemia in superior vena cava syndrome (SVCS). Case summary: A 57-year old male who had been treated for small cell lung cancer (SCLC) visited our hospital because of SVCS-like symptoms and decreased visual acuity in the right eye. On the initial examination, best corrected visual acuity was 0.5, intraocular pressure (IOP) was 38 mm Hg and relative afferent papillary defect was positive in the right eye. Slit lamp examination showed mild dilatation and tortuosity of the episcleral vessels and ruobeosis iridis. Gonioscopic examination showed neovascularization of the opened angle. Fluorescein angiography showed delayed choroidal filling and nevascularization of the disc. The patient was diagnosed with NVG with ocular ischemia in SVCS and was treated with chemotherapy and steroid therapy. In addition, intravitreal bevacizumab and IOP lowering eyedrops were administered to the right eye. During follow-up, neovascularizations disappeared and IOP was well controlled. Conclusions: NVG with ocular ischemia in SVCS should be considered as a possible cause of high IOP in SCLC patients. J Korean Ophthalmol Soc 2012;53(9):1346-1351
단안 부등시성 약시의 약시 치료 전후 다국소시유발전위 검사결과
전지훈,경성은,Ji Hoon Jeon,MD,Sung Eun Kyung,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.12
before and after occlusion treatment. Methods: The mfVEP was performed using RETIscanⓇ (Roland,Brandenburg, Germany) for patients with unilateral anisometropic amblyopia before and after occlusion treatment. Amplitude and latency values of mfVEP were analyzed according to the field divided by 6 rings or 4 sectors. Results: The each amplitude of values of all 6 rings were not significantly different before treatment (p = 0.077) in amblyopic eyes. However, the value of ring 1 (p = 0.00) was significantly higher than the value of other rings after treatment. In fellow eyes, the values of ring 1 was consistently significantly higher than the value of other rings before (p = 0.014) and after (p = 0.049) occlusion treatment. Additionally, the amplitudes of ring 1 (p = 0.005) and ring 3 (p = 0.007) were significantly increased in amblyopic eyes after occlusion treatment. In fellow eyes, the values of all rings did not change significantly. The analysis of amplitudes with 4 sectors revealed no significant result. The analysis of latencies with 6 rings and 4 sectors revealed no significant result. Conclusions: The change in amplitude on the central field (ring 1) in amblyopic eyes can be a useful objective monitoring method observing the improvement progress in visual acuity.
프리마운팅 탄성구조를 적용한 고속철도 제동디스크의 열구조 해석
전지훈(Ji Hoon Jeon),이호용(Ho Yong Lee),김민수(Min Soo Kim) 한국도시철도학회 2022 한국도시철도학회논문집 Vol.10 No.1
일반적으로 제동디스크는 제동과정 동안 가열과 냉각을 반복하여 열에 의한 피로손상이 발생한다. 제동과정에서 핫 스팟 및 높은 열응력이 마찰면과 체결부 주위에 발생하고, 디스크의 상하부면에 작용하는 제동 패드의 접촉력이 달라 마모량의 차이가 발생한다. 본 논문에서는 이러한 문제점들을 개선하기 위해 일반 화물차와 같은 상용차량 제동디스크의 프리마운팅 탄성구조를 고속철도 차량 제동디스크에 적용하여 위의 문제들의 개선방안을 제안하였다. 기존 철도 차량의 솔리드(Solid) 제동디스크와 프리마운팅 탄성구조 제동디스크에 대한 유한요소모델을 구성하고, 다이나모 시험조건을 적용하여 해석 모델을 구성하여 해석을 진행하였다. 최종적으로 해석 결과를 비교분석하여 제안된 탄성구조 방법에 대해 해석적으로 검증하였다. In general, brake disks cause fatigue damage due to heat by repeating heating and cooling during the braking process. During the braking process, hot spots and high thermal stress occur around the friction surface and the fastening part. And the contact force of the braking pads acting on the upper and lower surfaces of the disk is different, resulting in a difference in the amount of wear. In this paper, a structure for improving the above problems is proposed by applying a pre-mounting elastic structure of a braking disk of a commercial vehicle to a brake disk of a high-speed railway vehicle to improve these problems. A finite element model is configured for a solid brake disk and a pre-mounting elastic brake disk of an existing railway vehicle, and an analysis model is developed in which a dynamo test method is applied as an analysis condition. Finally, the analysis results are compared and analyzed to verify the proposed structure analytically.
전지훈 ( Ji Hoon Chun ),백지혜 ( Ji Hye Baek ),이경호 ( Kyung Ho Lee ),박철종 ( Chul Jong Park ) 대한피부과학회 2011 대한피부과학회지 Vol.49 No.7
Neurofibromas are spindle cell tumors of peripheral nerves that may be solitary or multiple. Usually neurofibromas may occur on any part of the body, but seldom involve the palms and soles. There have been no reports of neurofibromas developing on the sole in the Korean dermatologic literature. We report a 34-year-old woman with neurofibromas occurring on both soles.
전지훈 ( Ji Hoon Chun ),김정은 ( Jung Eun Kim ),오신택 ( Shin Taek Oh ),박현정 ( Hyun Jeong Park ),조백기 ( Baik Kee Cho ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.12
Background: Washboard nail most commonly involves the thumbnail or great toenail. As its name implies, it resembles a washboard with a series of evenly spaced ridges across the nail. A central depression can be seen as well. This can develop as the result of repeated habitual trauma to the proximal nail fold by the other fingers or by biting the nailplate. Thus, it is also called habit tic deformity or traumatic nail dystrophy. Although it is known to be not uncommon, there have been no studies on this with a sufficient number of cases and long term follow up. Objective: This study was conducted to provide a better understanding of washboard nail and to estimate the outcome of it. Methods: We reviewed all the medical records and clinical photographs of 21 patients who had been diagnosed with washboard nail at our department between July 2000 and July 2009. Results: The male to female ratio was 1:1.3. The patients` ages varied from 6 to 68 years, with an average of 25.4 years. The mean duration at the first visit was 4.4 years. The most common involved site was both thumbnails. Predisposing factors were found in 42.9% of the patients, which included nail picking or onychophagia. The treatment options were primarily intralesional triamcinolone injection and topical steroid. If the patient had the habitual tic, we educated them to restrain it. The follow up periods varied from 1 to 32 months with a mean of 7.9 months. Among the 14 patients with adequate follow up, 50% of these patients showed clinical improvement. Conclusion: This study demonstrated the clinical features of washboard nail. Physicians should closely observe the nail changes and long-term follow up is needed to determine the therapeutic response of patients with washboard nail. (Korean J Dermatol 2009;47(12):1353∼1358)