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이규성,정상섭,이규창,김영수,최중언,박용구,이헌재 대한신경외과학회 1981 Journal of Korean neurosurgical society Vol.10 No.1
Fifty seven transsphenoidal microsurgery was performed in 53patients with pituitary tumors and other juxtasellar lesions during 4 years since 1076 at Yonsei University Hospital. The results were analyzed and evaluated as follows: 1) Fourty seven (85.5%) of 55 patients had pituitary tumors, most of whom were in third to fifth decade. 2) Main symptoms in the patients pituitary tumors were headache (78.7%), visual symptoms (70.2%) and endocrine symptoms such as amenorrhea-galactorrhea (46.8%). 3) Endocrinological diagnosis of pituitary tumor revealed non-secreting adenomas in 30.8% and secreting adenomas in 60.25; of the patients. Prolactinomas were 71.8% of the secreting adenomas. 4) Improvement of the visual symptoms were seen in 57.9% of patients with diminished visual acuity and 70.9% of the patients with visual field defect. 5) Menstruation was returned in 4 patients among 5 patients of microprolactinoma treated by transsphenoidal microsurgery combined with Bromocriptine therapy. One of them delivered a normal baby and another patient is in pregnancy. 6) Mortality rate of transsphenoidal approach was 1.8% (1/57) and recurrence rate after transsphenoidal approach for pituitary tumors was 4.2% (2/47). 7) Trans-sphenoidal approach was thought to be relatively simple and safe for the surgery of pituitary and juxtasellar lesions.
원발성 중추신경계 림프종 23예의 치료 결과 분석 : Treatment Result of 23 Cases
이완수,김은영,장진우,박용구,이규성,최중언,정상섭,이규창 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.2
The authors report below a clinical study of 23 patients bearing 31 primary central nervous system lymphomas diagnosed between January 1985 and December 1994. The cohort included 13 men and 10 women whose mean age was 46 years, ranging from 28 to 61 years. No patient had antecedent of human immunodeficiency virus postivity but one had a past history of rheumatoid arthritis. The duration of symptom was less than 8 weeks in 52% of the patients. Symptom groups included increased intracranial pressure(78%), focla neurological decificit(52%), neuropsychiatric symptoms(43%) and seizures(13%). The histopathological diagnosies were done in 19 cases(10 cases by resective surgery, 9 cases by open or stereotactic biopsy). The others were diagnosed by the typical clinical course such as rapid disappearance of lesions after steroid therapy, and/or radiological findings. Histological subtypes(National Cancer Institute Working Formulation) was confirmed in 8 patients including 3 cases of diffuse large cell type. Phenotype was determined in 7 patients : 4 were B-cell type and 3 were T-cell type. One patient committed suicide during the radiation therapy and was therefore excluded from the survival analysis. All but two patients received radiation therapy. Five patients received chemotherapy. The over-all Kaplan-Meier survival rate was 46% at 2 years and 15.5% at 5 years. On univariate analysis, statistically significant prognositc factor associated with survival was not found but the higher Karnofsky score and single lesion were found to be favorable to the long-term survival. In the statistical analysis of the patients who received radiation therapy, surgical resection did not significantly influence the survival.
Resorption of Autogenous Bone Graft in Cranioplasty: Resorption and Reintegration Failure
Lee, Si Hoon,Yoo, Chan Jong,Lee, Uhn,Park, Cheol Wan,Lee, Sang Gu,Kim, Woo Kyung Korean Neurotraumatology Society 2014 Korean Journal of Neurotrauma Vol.10 No.1
<P><B>Objective</B></P><P>Re-implantation of autologous skull bone has been known to be difficult because of its propensity for resorption. Moreover, the structural characteristics of the area of the defect cannot tolerate physiologic loading, which is an important factor for graft healing. This paper describes our experiences and results with cranioplasty following decompressive craniectomy using autologous bone flaps.</P><P><B>Methods</B></P><P>In an institutional review, the authors identified 18 patients (11 male and 7 female) in whom autologous cranioplasty was performed after decompressive craniectomy from January 2008 to December 2011. We examined the age, reasons for craniectomy, size of the skull defect, presence of bony resorption, and postoperative complications.</P><P><B>Results</B></P><P>Postoperative bone resorption occurred in eight cases (44.4%). Among them, two experienced symptomatic breakdown of the autologous bone graft that required a second operation to reconstruct the skull contour using porous polyethylene implant (Medpor®). The incidence of bone resorption was more common in the pediatric group and in those with large cranial defects (>120 cm<SUP>2</SUP>). No significant correlation was found with sex, reasons for craniectomy, and cryopreservation period.</P><P><B>Conclusion</B></P><P>The use of autologous bone flap for reconstruction of a skull defect after decompressive craniectomy is a quick and cost-effective method. But, the resorption rate was greater in children and in patients with large skull defects. As a result, we suggest compressive force of the tightened scalp, young age, large skull defect, the gap between bone flap and bone edge and heat sterilization of autologous bone as risk factors for bone resorption.</P>
D-Effects of Scope Change and Focus in the RTO Construction
Lee Doo-Won,Lee Na-Uhn 원광대학교 인문학연구소 2009 열린정신 인문학연구 Vol.10 No.1
영어와 일본어의 여격구문에서 여격 목적어-직접목적어의 어순은 여격 목적어의 광의 영향권만을 갖는 반면에, 직접목적어-간접목적어 어순은 본래의 영향권 변화를 야기한다. 이를 바탕으로 목적어인상구문에서 인상된 목적어의 영향권 변화가 이동의 증거가 됨을 고찰하였다. Chomsky (2005)의 주변자질이동에 근거한 D. Yang (2009)의 무표적 병합은 수의적으로 일어나는 이동이 비일치로 이루어지며 주변자질에 의해 그 이동의 동기가 부여된다는 특징을 갖는다. 그 무표적 병합의 결과가 이동한 요소의 담화 효과이다. 한국어 인상구문에서 인상되는 하위절 주어의 작용역 변화와 초첨해석이 이에 해당한다. 인상 요소는 주제로 기능할 수 없음을 H. Im (2008)의 주제표현 검증 장치인 ‘-로 말하면’으로 입증하였다. 결국, 이 연구는 한국어 인상구문에서 보문절 주어가 상위절로 초점 표시자인 ‘를’이 외현적으로 실현되면서 이동함을 그 영향권 변화를 근거로 주장하였다.
Lee Dong-uhn,Hak-cheol Ko,Son Byung Chul 대한말초신경학회 2018 The Nerve Vol.4 No.1
Occurrence of heterotopic ossification (HO) following cervical total disc replacement (TDR) is well-known phenomenon. However, its occurrence after anterior cervical fusion (ACF) is very rare. We report a 59-year-old male patient with diffuse idiopathic skeletal hyperostosis (DISH) presenting with dysphagia due to unusually rapid regrowth of cervical syndesmophytes 64 months following ACF (C3-C6) for cervical spine fracture. Indeed, development of recurrent cervical osteophytes at C4 was evident radiologically at postoperative one year and continued regrowth occurred over years. Surgeons should continue to follow patients with cervical osteophytes associated with DISH to assess the regrowth of osteophytes.
Probabilistic Model and Analysis of a Conventional Preinstalled Mine Field Defense
Lee, Young-Uhn Military Operations Research Society of Korea 1980 한국국방경영분석학회지 Vol.6 No.2
Simple models for a defense consisting of a preinstalled mine field possibly defended by an anti-tank weapon are derived and analyzed. This paper uses a special Poisson process to model the one or two positions of mines in the mine field. The duel between the anti-tank weapon and offensive tanks crossing the field is modeled with a continuous time Markov chain. Some algebraic solutions and numerical results are obtained for specific scenarios.
이일화(Lee Il-Wha),이성진(Lee Sung-Jin),권오정(Kwon Ohjung),정운기(Jeong Uhn-Ghi) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
An active application of concrete track is being expected for the future construction of Korean railroad. For the successful concrete track construction and design in earthwork areas, the residual settlement should be reasonably estimated using the proper method. The concrete track is extremely vulnerable to the damage of residual settlement. However, at the transition areas such as bridge approach, differential settlement will likely occur due to difference of stiffness, poor drainage and poor ground treatment. The maintenance is very difficult for excessive settlement on existing line, it is need to constrain the residual settlement in step of design. In this paper, it is performed the analysis of the residual settlement measured data, test results and reference to understand the residual settlement behavior of concrete track roadbed