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김영태,이춘성,노경민,손현철 대한척추외과학회 2000 대한척추외과학회지 Vol.7 No.3
연구 목적 : 보존적 치료에 반응하지 않은 척추분리증 환자의 치료로서 Buck에 의해 기술되었던 나사못 고정술과 골이식술의 임상적 및 방사선학적 결과를 분석하고자 하였다. 대상 및 방법 : 1992년 3월부터 1999년 3월까지 척추분리증에 대해 buck 술식으로 수술 받은 평균연령 23세의 환자 12례를 대상으로 하였다. 수술의 적응증은 1) 30세이하, 2) 하지 방사통을 동반하지 않는 심한 요통이 6개월 이상의 보존적 요법에 반응하지 않고, 3) 자기공명영상검사에서 추간판의 퇴행성 변화가 관찰되지 않으며, 4) 요추부 측면 굴곡-신전 방사선 검사상 불안정성이 없는 경우로 하였다. 추시기간은 12개월에서 4년 6개월까지 평균 2년 1개월이었다. 술 전,술 후 및 최종 추시시에 시행한 방사선 검사와 술 후 단일광자방출단층촬영(bone SPECT)에서 골유합 여부, 나사의이완 및 파괴 여부를 확인하였고, 임상적으로는 Henderson의 주관적 평가방법에 따라 요통의 호전 여부를 평가하였다. 결과 : 방사선학적 유합으 소견은 척추 후궁 협부의 육주화(trabeculation)를 기준으로 하였으며 8례에서는 골유합, 2례에서는 편측만 골유합, 나머지 2례에서는 불유합의 소견을 보였다. 단일광자방출단층촬영은 7례에서 시행되었으며, 이 중 5례에서 술 후 협부의 연속성을 보여 골유합을 확인할 수 있었다. 골유합까지의 기간은 평균 3.1개월(2.5-6.2개월)이었다. 최종 추시시까지 나사의 이완은 없었으나, 1례에서 술 후 7개월에 양측 나사의 파괴 및 불유합 소견을 보였다. Henderson의 평가방법에 따른 임상적 결과는 우수 5례, 양호 5례로 총 10례(83.3%)에서 양호 이상의 결과를 보였다. 결론 : 척추분리증의 치료 방법중의 하나인 Buck 술식은 수술방법이 간단하고 합병증이 적어 환자의 만족도도 높은 것으로 생각되어지며, 젊은 환자 연령층에서 선택적으로 사용하면 만족할 만한 결과를 얻을 수 있으리라 생각된다. Study Design : This is a retrospective study analysing the results of Buck's operation for spondylolysis. Purpose : To analyze the results of Buck's methods as a treatment for symptomatic sopndylolysis clinically and radiographically. Materials and Methods : Between March 1992 and March 1999, 12 paitients with with symptomatic spondylolysis were treated with Buck's method. Surgical indication was 1)under 30 years of age, 2)patients with intractable low back pain without sciatica who did not response to conservative treatment for over 6 months, 3)without disc degeneration in lumbar MRI, 4)without instability in lateral fexion-extension view. The average age was 23 years and the follow up periods ranged from 12months to 54 months, months. We confirmed union of edfect and loosenin or breakage of screws in preoperative, postoperative and the final radiographs, and in bone SPECT. And we analyzed symptomatic improvement by subjective assessment guidelines of Henderson clinically. Results : Rediologically. union of defect by trabeculation was seen in 8 patients, in 2 patients unilaterally. In bone SPECT, union of defect was seen in 5cases among 7 cases postoperatively. Average periods of union were 3.1 months(2.5-6.2months) cally, 10 patients(83.3%) were rated as excellent or good-5 patients excellent, 5patients good-accordin to subjective assessment guidelines of Henderson. Conclusion : It is suggested that Buck's operation, one of the nethod of treatment of spondylolysis is simple and has low complication rate. We concluded that it is satisfactory to use Buck's operation in young aptients with symptomatic spondylolysis.
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김영태,이춘성,조용선,염태하 대한척추외과학회 1997 대한척추외과학회지 Vol.4 No.1
Objectives : This study was undertaken to retrospectively analyze the preoperative radiologic evaluation and the result of the treatments of cervical spondylosis. Materials and Methods : We reviewed the clinical and radiological aspects of 45 cervical spondylosis patients who had been managed conservatively and poeratively in Asan Medical Center from September 1989 to May 1995. Preoperative plain radiogrphs and MRI were evaluated with clinical symptoms. Postoperative clinical evaluation was performed according to the Robinson's criteria. Results : On plain lateral radiographs, mean spinal canal diameters were 14.8±2.3, 12.9±1.7㎜, Ravlov ratio were 0,78±0.09, 0.71±0.08 and spondylosis index were 0,85㎜, 1.75㎜ in radiculopathy and myelopathy group respectively. The anterio-posterior compression ratio of spinal cord were 53.1±7.9%, 43.2±7.4% respectively. Conservatively managed 23 radiculopathy patients showed clinically excellent in 18, good in 3 and fair in 2 cases. The 6 radiculopathy patients who received anterior decompression and interbody fusion were excellent in 5 and good in one case. The 9 myelopathy patients who underwent anterior decompression and interbody fusion were excellent in 6, good in one, and fair in 2 cases. Seven myelopathy patients who underwent laminoplasty were excellent in 6 and good in one case. Conclusion : Cervical spondylosis patients who have anterio-posterior spinal canal diameter below 13 ㎜, Pavlow ratio less than 0.8 and spondylosis index more than 1.5 ㎜ on plain radiogram are vulnerable to developing cervical spondylotic myelopatgy. It is better to do anterior decompression kyphoticdeformity of the cervical spine. Otherwise, cervical spondylotic patients who have diffuse spondylotic changes more than 3 segments and narrow spinal canal can be managed using laminoplasty posteriorly.
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청간해주탕(淸肝解酒湯)이 alcohol 대사관련 유전자 및 apoptosis에 미치는 영향
김영태,김영철,우홍정,이장훈,Kim Young-Tae,Kim Young-Chul,Woo Hong-Jung,Lee Jang-Hoon 대한한방내과학회 2003 大韓韓方內科學會誌 Vol.24 No.1
Objectives : This study was designed to investigate the effects of Chungganhaeju-tang on expression of alcohol metabolizing enzymes, cell viability and alcohol-induced apoptosis. Materials and Methods : For this study, the human hepatoma cell line HepG2 was used. HepG2 cells were treated with ethanol-or acetaldehyde, chungganhaeju-tang, anti-Fas neutralizing antibody and were investigated by using quantitative RT-PCR, MTT and Trypan blue exclusion assays. Results : The results are summarized as follows: 1. Quantitative RT-PCR analysis demonstrated that ethanol-or acetaldehyde-mediated increase of ALDH gene expression was not affected by Chungganhaeju-tang treatment. 2, Ethanol-or acetaldehyde-induced apoptosis was remarkably inhibited by Chungganhaeju-tang in a dose-dependent manner. 3, Ethanol-or acetaldehyde-induced apoptosis was significantly blocked by anti-FasL neutralizing antibody, suggesting apoptosis induced by alcohol might be mediated by FasL/Fas signaling pathway. Conclusions : Taken all together, these results indicate that the FasL/Fas signaling plays a critical role in alcohol-induced apoptosis and Chungganhaeju-tang increases viability of liver cells by suppression of the FasL/Fas-mediated apoptosis-signaling pathway.
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김영태 김천대학교 1997 김천대학교 논문집 Vol.18 No.-
A dielectric waveguide structure using rectangular dielectric strip is analyzed directly in terms of the wave equation for quasi TE and quasi TM modes. This problem can be solved, with no approximation in the wave equation for the electric field E and magnetic field H inside and outside the dielectric rectangular waveguide matching the boundary conditions between interfaces. This leads to an eigenvalue problem where spurious modes do not appear. Dispersion characteristic examples are presented for square and rectangular waveguides. The formulation is general and can be used for comparison with other methods such as FDM or FEM in various structures.
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패턴매칭에 의한 이진 한글문서의 유.무손실 압축에 관한 연구
김영태,고형화 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.4
The textual image compression by pattern matching is a coding scheme that exploits the correlations between patterns. When we compress the Hangul (Korean character) text by patern matching, the collerations between patterns may decrease due to randoem contacts between phonemes. Therefore in this paper we separate connected phonemes to exploit effectively the corrlation between patterns by inducting the amtch. In the process of sequation, we decide whether the patterns have vowel component or not, and then vowels connected with consonant ae separated. When we compare the proposed algorithm with the existing algorith, the compression ratio is increased by 1.3%-3.0% than PMS[5] in lossy mode, by 3.4%-9.1% in lossless mode than that of SPM[7] which is submitted to standard committe for second generation binary compression algorithm.
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