동측에 발생한 대퇴골 경부 및 간부 골절의 치료

권진우,김기환,문상호,공규민,손경태,이상훈,권태우 대한골절학회 2003 대한골절학회지 Vol.16 No.3

목적: 동측의 대퇴골 경부 골절과 간부 골절이 동반된 경우에서 수술적 치료에 대해 본원에서 실시한 수술 방법들의 결과를 분석하였다. 대상 및 방법: 수술 후 1년 이상 추시 관찰이 가능하였던 11례를 대상으로 하였으며 경부 골절은 Garden 제 1형이 3례, 제 2형이 6례, 제 3형이 1례, 제 4형이 1례였다. 간부 골절은 중간부가 7례, 원위부가 4례였다. 추시 기간은 최소 1년 이상으로 평균 33개월이었고 11례 전부가 남자였으며 나이는 22세에서 54세로 평균 38세였다. 각 수술 방법에 따른 수술시간을 측정하였으며 방사선학으로 골유합의 시기, 부정유합, 불유합 등을 평가하였고 임상적으로는 골절부의 동통 및 관절 운동장애를 평가하였다. 결과: 치료 방법으로는 경부는 다발성 피고정술이 8례, 활강압방 고 나사못고정술이 1례였으며 간부의 경우는 중간부는 역행적 Ender정 고정술이 4례 , 금속판 고정술이 1례, 재건상 골수강내 고정술이 2례, 역행적 금속정 고정술이 1례였고, 원위부는 금속판 고정술이 1례, 역행적 교합성 금속정 고정술이 3례였다. 평균 수술시간은 재건상 골수강내 골종술이 180분, 다발성 핀고정술 및 금속판 고정술이 220분, 다발성 핀고정술 및 역행적 골수강내 고정술이 200분이었다. 골유합 기간은 간부 골절의 경우 평균 5개월이었다. 경부 골절에 대한 합병증으로는 간부 골절에 대해서 Ender정 고정술을 한 1례와 간부에 금속판 고정술을 한 후 지연진단되어 경부에 다발성 핀고정술을 한 1례에서 대퇴골두에 무혈성 괴사증이 병발하였으며 재건상 골수강내 금속정 삽입술을 한 1례에서 수술시 경부 골절의 정복소실이 있었으며 간부 골절에 대한 합병증으로는 역행적 금속정 고정술을 한 2례 (Ender정 1례와 교합성 금속정 1례)에서 불유합이 생겨서 금속판 고정술 및 자가골이식술로 대치하였다. 그리고 Ender정 고정술을 한 1례에서 지속적인 슬관절 주위 동통이 있었다. 결론: 대퇴골 경부 골절과 동측의 간부 골절이 동반된 경우의 수술적 치료에서 재건상 골수강내 금속 고정술은 기술적으로 어려움이 많아서 경부와 간부의 치료를 각각 하는 것이 기술적으로 쉬웠다. 수술시는 경부 골절의 수술을 먼저 하여도 고정에 어려움이 없었으며 간부 골절은 분쇄 골절이 많기 때문에 견고한 내고정이 필요하였다. Purpose: The purpose of this study was to analysis the result of operative treatment in ipsilateral femur neck and shaft fracuture. Material and Methods: Eleven cases of ipsilateral femur neck and shaft fractures were operated and followed more than 1 year. There were 11 men and mean age at index operation was 38 years (range 22~54). In neck fracture there were 3 of type Ⅰ, 6 of type Ⅱ, and 1 of typeⅢ according to Garden classification, shaft fractures were located an middle 1/3 (7 cases), at distal 1/3 (4 cases). We evaluated the operation time, union time, nonunion, malunion, and clinical evaluation with pain and joint stiffness. Result: In neck fractures treatment methods were 8 of multiple pinning, 2 of reconstruction nail and 1 of CHS, in shaft fractures 2 of DCP, 7 of retrograde nailing (3 Ender nail, 4 interlocking nail). The mean operation time was 180 minutes in reconstruction nail, 220 minutes in multiple pinning and DCP and 200 minutes in multiple pinning and retrograde nailing. The mean time for shaft union was 5 months. The complications were 1 case of neck reduction loss during operation in reconstruction nailing group, 1 of persistant pain around knee in Ender nailing group. Conclusion: The author think that reconstruction nail fixation is technically difficult, thus neck and shaft fracture be fixed individually. Neck fracture can be fixed first without difficulty and shaft fractures should be fixed rigidly due to comminution.

물류서비스 품질이 고객만족에 미치는 영향

권은영,문상영 동의대학교 경제경영전략연구소 2010 經濟經營硏究 Vol.5 No.1

The purpose of this study is to identify effects of logistics service quality on customer satisfaction in online sales company. Since korean customer lay weight on an personal relationship rather than various other factors for service quality, different approach for customer service in korean online sales company compared to online sales company in advance countries should be considered. To do so, previous studies are broadly reviewed

역행적 골수정 삽입술을 이용한 대퇴골 과상부 골절의 치료

권진우,신승호,조원호,성기호,김기환,손경태,이상훈,박세원,배종문,권태우 대한골절학회 2003 대한골절학회지 Vol.16 No.4

초음파 펄스에코 데이터 기반 3차원 시각화 방법론

권정현,장홍래,성제중,안형근,장순재,송문호 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1

The nondestructive testing using ultrasonic pulse-echo data is an effective test methodology esperially for metal structure. Typically, the ultrasonic pulse-echo data is processed and the results are shown in A-scan, B-scan or C-scan formats. Upon viewing B-scan and C-scan data the viewer is able to identify the location of faults as well as their rough dimension. In this paper, we evaluate the applicability of various 3-D visualization methods frequently used in medical imaging, namely, surface rendering (SR), volume rendering (VR) and maximum intensity projection (MIP), for nondestructive testing purposes. Such 3-D visualization of ultrasonic pulse-echo data enables easier identification of the location and dimension of faults more accurately.

X선 촬영인자의 변화에 따른 영상의 주관적인 화질 평가

권덕문,박명환,김성환,박종삼,이준일,남효덕 대구보건대학 2001 대구보건대학 論文集 Vol.21 No.-

In this study, visual recognition of X-ray images were estimated using hawlet charts. The resolution has achieved excellent result when densities of film were 1.0~1.5. The more thickness of object was increase, the more the resolution was decrease, because scattered X-ray were increased. The more distance of object to film was increase, the more the resolution was decrease, because groedel effect. The more focal spot size was increase, the more resolution was decrease, because unsharpness was increase. The more field size was increase and grid ratio was decrease, the more resolution was decrease, because scattered X-ray were increase. As a result, we could to improve image quality by determination of resolution according to Radiography parameters. And, we proved that hawlet charts were useful for estimate of image quality and set up x-ray radiography.

유치열에서 scissors bite의 치료에 대한 증례보고 : CASE REPORT

문성권,김정욱,이상훈,한세현,장기택 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2

중심교합위 상태에서 편측이나 양측으로 구치부의 상악치아가 하악치아의 협측으로 위치한 경우를 scissors bite라고 한다. 이런 부정교합은 상악의 폭이 크거나 하악의 폭이 좁은 경우 발생한다. 이로 인해 턱의 성장이 방해를 받고 악궁간 부조화를 유발하며 적절한 저작을 할 수 없게 된다. 따라서 scissor bite는 즉시 차단 교정을 해야 하며 일반적으로 scissors bite의 치료는 고정성 또는 가철성 장치를 이용하여 하악을 확장한다. 이에 저자는 scissors bite를 보이는 환아의 4세의 두명의 남아에게 Schwarz 장치를 이용하여 양호한 결과를 얻어 scissors bite의 치료법 제시에 도움이 되고자 보고하는 바이다. A scissors bite in the posterior teeth occurs when the upper teeth are positioned totally or unilaterally buccal to the lower teeth in centric occlusion. This malocclusion can result from either excessive width of maxilla, deficient width mandible, or combination of both. The malocclusion can lead to hindered growth of jaws or to asymmetry between the jaws. Besides, the severe lingual inclination of the mandibular posterior teeth prevents adequate mastication. Thus, the scissors bite is in need of immediate interceptive orthodontic interbention. The common treatments of the scissors bite is to expand the mandibular arch: fixed or removable appliances. In our clinic, we made a seccess in treatment of the scissors bite using the Schwarz appliance. We treated the scissors bite using the lower Schwarz appliance for a mean observation period of 21 months. The subjects were 2 boys, aged 4 years.

진단용 X-선 장치에서 조사야조절기구의 성능개선에 대한 연구

권덕문,김성환,유동수,남효덕 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-

The performance of the X-ray equipment's collimator system was improved by using ultrasound distance indicator and laser unit. The laser beams were coincided with radiation field. The distance between X-ray focus and film could be measured by using the ultrasound distance indicator attached collimator. According to the actual investigation in collimator, 30% of equipments were not satisfied recommendations on standard of illumination intensity, and 25% of them were not satisfied recommendations on limits of light/radiation field coincidence. Therefore by using laser beam coincided with light field the difference between light field and radiation filed could be decreased. By using the ultrasound distance indicator, the distance between focus and film could be measured easily, rapidly and correctly.

Azomethine 탄소원자의 친핵성 치환반응 (제 1 보) 물-디옥산 혼합용매중 Aryl N-Aroylchloroformimidate 유도체의 가용매 분해반응

성낙도,권기성,박문규 圓光大學校 1981 論文集 Vol.15 No.1

Kinetic studies on solvolsis reactions of aryl N-aroylchloroformimidate derivatives in 1.4-dioxane-water mixture have been carried out by means of ultra-violet spectrophotometry at 20℃. Results of m values of Grunwald-Weinstein plots(m=0.4~0.8), substituent effect(ρ=0.15), and n values of Kivinen plots(n=0.7~1.2), show that the solvolysis displacement of aryl N-aroylchloroformimidate derivatives proceed via SN₂ mechanism.

α-Bromobenzaldehyde-p-nitrophenylhydrazone의 알카리 가수분해 반응 메카니즘

권기성,이천배,박문규,성낙도 충남대학교 기초과학연구소 1980 연구논문집 Vol.1 No.-

The rate constants for the hydrolysis of the derivatives of α-bromobenzaldehyde-p-nitro-phenylhydrazone (p-H, p-OCH_3, p-Cl, p-NO_2) at various pH have been determined by UV spectrophotometry in 50% dioxane at 25℃ and the following rate equations which can be applied over wide pH range were obtained. i. e. α-bromobenzaldehyde-p-nitrophenylhydrazone; kobs.=1.25×10 exp (-7) + 7.92×10 exp (-11)/〔H^+〕+1.51×10 exp (-7) α-bromo-p-chlorobenzaldehyde-p-nitrophenylhydrazone; kobs.=1.06×10 exp (-7) + 1.08×10 exp (-10)/〔H^+〕+1.45×10 exp (-7) α-bromo-p-methoxybenzaldehyde-p-nitrophenylhydrazone; kobs.=1.79×10 exp (-7) + 1.40×10 exp (-10)/〔H^+〕+4.08×10 exp (-7) α-bromo-p-nitrobenzaldehyde-p-nitrophenylhydrazone; kobs.=7.10×10 exp (-8) + 2.89×10 exp (-10)/〔H^+〕+2.37×10 exp (-7) Below pH 2, the rate of hydrolysis of α-bromobenzaldehyde-p-nitrophenylhydrazone is accelerated by electron-donating group (ρ=-0.91). Above pH 5, however, this reaction is slowded down by electron-attracting group (ρ=0.37). From the rate equation and the effect of solvent and substituent upon the rate of reaction, below pH 2, the hydrolysis proceed through SN_1 mechanism. Above pH 5, the hydrolysis proceed through 1.3-dipolar ion mechanism. And in the range of pH 2∼5 these two reactions occur competitively.

N-phenylbenzohydrazonyl bromide의 加水分解反應

權奇星,成洛道,朴文奎 충남대학교 자연과학연구소 1979 學術硏究誌 Vol.6 No.1

The rate constants for the hydrolysis of phenylbenzohydrazonyl bromide (BPH) at various pH range are determined by spectrophotometry and a rate equation which can be applied over wide pH range is obtained. Analysising pH-rate profile, the total rate constants consists of three parts; (1) pH independent part, (2) dependent on hydrogen ion, and (3) dependent upon hydroxide. A general rate equation which can be applied over wide pH is as following; kt=ko+k^(H)[H₃O^(+)]+k^(OH)[OH^(-)] kobsd.=2.76×10^(-6)+6.41×10^(-4)[H₃O^(+)]+3.77×10^(-19)/[H₃O] The hydrolysis proceed through addition-elimination below pH 2.50 and SN₂reaction above pH 13.0. In the range of pH 4.0-11.50, SN₁reaction occur respectively.