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주상골 골절에서 Herbert/Whipple 나사못의 바람직한 위치 : 모형연구 A Model Study
유재두,김종오,윤여헌,고영도,배서영,이정준 대한골절학회 2002 대한골절학회지 Vol.15 No.4
목 적 : 주상골 골절 치료에 사용하는 Herbert/Whipple 나사못의 바람직한 삽입 위치를 알아보고자 하였다. 대상 및 방법 : 4개의 사체에서 분리한 주상골을 이용하여 각 주상골마다 12개씩 주물 모형을 제작하여 대상으로 하였다. 각 모형에서 핀 삽입 안내 장치(jig, Zimmer??)를 이용하여 안내핀(guide wire)을 원위부에서 근위부를 향해 삽입하되 원위부에 A, B, C, D의 4개 근위부에 0, 5, 10의 3개의 지점을 설정하여 총 12가지 방법으로 삽입하였다. 각 모형은 주상골의 장축에 직각인 방향으로 근위부, 요부, 원위부의 세 단면을 만들고 핀 삽입의 흔적과 가장 가까운 피질골 표면과의 거리를 측정하여 이 거리가 대적으로 길 때 안전한 것으로 평가 하였다. 결 과 : 핀 삽입의 흔적과 가장 가까운 표면과의 거리가 근위부에서는 D5, 원위부에서는 C10이 유의하게 길었다. 원위 삽입 위치를 기준으로 하였을 때 근위부에서 C가 유의하게 거리가 길었고 요부, 원위부, 그리고 근위 목표 지점을 기준으로 하였을 때의 측정된 거리는 유의한 차이가 없었다. 결 론 : Herbert/Whipple 나사못의 삽입 위치는 근위부 골절에서는 D5군, 원위부 골절에서는 C5군이 가장 바람직한 위치라고 할 수 있엇고 요부 골절에서는 A0군과 D0군을 제외하면 별 다른 차이 없이 비교적 안전하다고 할 수 있다. 바람직한 위치 선정을 위해서는 근위부의 목표지점보다 원위부의 지점을 정확히 하는 것이 중요하다고 사료된다. Purpose : To evaluate optimal placement of the Herbert/Whipple screw in scaphoid fracture Materials and Methods: Forty eight model molded from four cadaver scaphoids were used for this study. Using the Herbert/Whipple jig, the guide wire was placed distal to proximal into each scaphoid with twelve method which were four entry points and three target points. Guide wire placement was then evaluated with three planes in the proximal, middle, distal planes and distance from the nearest cortex. Results : The most concentric position in the proximal plane was D5, in the middle plane C10. As distal entry point, the most concentric position in proximal plane was C. There were no statistical concentric, as middle, distal plane, and proximal entry point, Conclusion : The most ideal placement were D5 in proximal fractures of the scaphoid, C5 in distal fractures. In waist fractures of the scaphoid, there were relatively safe, except A0 and D0. The position of entry points was more important than that of target points for ideal screw placement.
Syntactic-Semantics 방법에 신경망을 결합한 온라인 한글 필기체 인식
박두일,조범석,유재휘 명지대학교 공학기술연구소 1993 공학기술연구소 논문집 Vol.8 No.-
This paper presents a cursive on-line handwritten Hangul recognition model which permits cursive writing between graphemes. Add semantics to the basic stroke types possessed by graphemes and expand stroke types. Also, by the design of attribute grammer more accurate feature values will be elicited. The combination of the feature values with genetic algorithm and BP will improve the neural networks model, and this type of learning will increase the recognition rate and reduce the learning time. In this paper, this new on-line handwritten Hangul recognition model is proposed.
고성능 액체 크로마토그래피에 의한 연고속에 함유된 Miconazole nitrate의 분석
유영재,박두천,도광미 昌原大學校 基礎科學硏究所 1995 基礎科學硏究所論文集 Vol.7 No.-
An Analysis method has been developed for the determination of Miconazole nitrate, 1-[2-(2,4-Dichlorophenyl)-2-[(2,4-dichlorophenyl) methoxy] ethoxy]-1H-imidazole nitrate in commercially available ointments using High Performance Liquid Chromatography(HPLC). The chromatographic separation was achieved on a reversed phase column(5μ ULTRASPHERE ODS) using Methanol/25mM phosphate Buffer, pH 3.0(80:20 V/V) as mobile phase, and their response was detected by UV-detector at 272nm. Quantification is performed by both the Calibration Curve Method and the Standard Addition Method. The total run time is less than 10 min. The Linear Dynamic Range is 0.02-225μg/mL, Minimum Detection Limit 0.02 μg/mL, and the optimum working concentration was 20μg/mL. The resultant % contents of Miconazole nitrate measured from various ointments samples (nominal value 2%) were 2.02% by Standard Addition Method and 2.02% by Calibration Curve Method.
방사화학 분석법을 이용한 백금족 원소의 아화학양론적 용매추출법
유영재,박두천 昌原大學校 基礎科學硏究所 1996 基礎科學硏究所論文集 Vol.8 No.-
Using the radioisotopes as tracers, platium and palladium were analyzed quantitatively by the substoichiometric solvent extraction method. By extracting platium and palladium in Hydrochloric acid into carbon tetrachloride as metal-Dithizonate chelating complex with Dithizone of substoichiometric amounts, optimum extraction conditions-hydrogen ion concentration range, extraction time, substoichiometric reproducibility of extraction and the interference effects of anions and cations-were investigated. And extraction mechanism was elucidated by taking advantage of substoichiometric principles and the experimental results. But platium and palladium could not be seperated mutually because of the similarities of extraction conditions.
양재헌,김동수,류희두,이남희 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-
Precipitation was formed during the preparation of decoction from mixure of Scutellariae Radix and Coptidis Rhizoma or Phellodendri Cortex according to the prescription of Hwang-ryean-hae-dog-tang. Baicalin and berberine, the active ingredients of the two herbal medicine were identified in coprecipitated product. Pills were prepared using the coprecipitated product and various binders. The dissolution rate of baicalin and berberine from pills was increased in at pH1.2 when acacia or tragacanth was used. The absorption rate of baicalin from the coprecipitated product was raster than the from Scutellaria extract, but the absorption of berberine from CPP was slower in stomach, duodenum and jejunum of rats compared with Coptis expract. The time equired for the maximum serum concentration (Cmax) of baicalin and berberine from CPP in mice were 150 and 200 min after oral administration. respectively. The maximum serum concentration of baicalin from CPP in mice was higher than Scutellaria extract, but the concentration of berberine was lower compared with Coptis extract. The minimum inhibitory concentration of CPP was below 50 ug/ml against gram positive bacteria, and was higher than that against gram negative bacteria. The antibacterial activity of CPP was lower than the of berberine.but was more potent than Scutellaria extract. It was found that the ingibition rates of growth by CPP against S. cpidermidis, K. pneumoniae, B cereus and S. aureus were 60.1, 5.11, 45.4, and 39.9%. respectively.
노권재,유재두 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.4
The cause of carpal tunnel syndrome is the compression of median nerve at the carpal tunnel. Surgical release of transverse carpal ligament is indicated if symptom persists in spite of conservative treatment. Release of transverse carpal ligament without neurolysis is sufficient to relieve the symptom. Several methods of endoscopic treatment have developed and the good results were reported. We reported the results of 13 cases treated with endoscopic carpal tunnel release in 12 patients from March 1995 to July 1996. Eleven cases treated with one portal technique(Agee) and 2 cases treated with two incision technique(Chow). Average follow-up period is 11months(4-19 months). Average age was 48.5(35-56)years old. There were 11 women and 1 male. Average duration of symptoms before the operation was 9 months. According to Cseuz's creiteria, excellent results was obtained in 77% of patients. Tingling sensation dimnished within 24 hours after operation in six patients. Two thenar atrophy didn't recovered at 8 months after operation. Three scar tenderness occured. Relief of symptom was achieved quickly when endoscopic method was used but several technical pitfall must be avoided.