Ropivacaine 을 이용한 경막의 마취시 Clonidine 병용의 효과

김종일,조영훈,이상곤,민병우,이지향,반종석 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.41 No.4

Effects of Clonidine Added to Ropivacaine in Epidural Anesthesia Young-Hoon Cho, M.D., Ji-Hyang Lee, M.D., Sang-Gon Lee, M.D., Jong-Il Kim, M.D.^*, Jong-Suk Ban, M.D., and Byung-Woo Min, M.D. Department of Anesthesiology, Daegu Fatima Hospital, Daegu, Korea ^*Kim Jong Il Pain clinic, Daegu, Korea Background: Clonidine has been regarded as an adequate supplementary anesthetic during epidural anesthesia and has been used with local anesthetics such as bupivacaine or lidocaine to support the effects of these anesthetics. The authors would examine whether clonidine is an adequate supplementary anesthetic when it is used with ropivacaine during epidural ane-sthesia. Methods: Thirty-two healthy patients undergoing a hip or lower limb surgery were diveded into two groups. In group 1, 0.5% ropivacaine 15 ml was administered. In group 2, 0.5% ropivacaine 15 ml combined with clonidine 150 ㎍ was administered. Onset, duration and maximal height of sensory block were assessed. Sedation score, blood pressure and heart rate were measured. Results: Duration of sensory block of group 2 was significantly longer than that of group 1. Sedation score of group 2 was significantly higher than that of group 1. Blood pressure of group 2 was sig-nificantly lower thatn that of group 1 at 50 min, 70 min and 90 min after epidural injection. No significant differences were observed in onset of sensory block and heart rate between the two groups. Conclusions: The addition of clonidine to ropivacaine during epidural anesthesia prolonged duration of sensory block and produced useful sedation. It caused relatively stable hemodynamic changes. These results suggest that clonidine is an adequate supplementary anesthetic when it is used with ropivacaine during epidural anesthesia. (Korean J Anesthesiol 2001; 41: 428~433)

유전자 알고리즘을 이용한 디지털 영상 압축

김향태,양종현 광주대학교 2000 産業技術硏究 Vol.14 No.-

본 논문에서는 VQ 코딩 기법을 기반으로 한 디지털 영상 압축을 제안한다. 첫째는 유전자 알고리즘을 이용해서 전역적인 최적화 코드 북을 만들어 낸다. 또한 유전자 알고리즘을 이용해서 이동 가능한 유전인자를 사용해 본 알고리즘의 계산 효과를 높일 수 있다. 인코딩과 디코딩의 모의실험 후에 재생된 영상과 실험을 통해, 본 알고리즘이 믿을 만 하다는 것을 알 수 있다. 뿐만 아니라 정지 영상이나 순차적인 영상의 압축에도 응용할 수 있다. 물론, 다른 최적화 분야에도 본 유전자 알고리즘을 이용할 수 있을 것이다. In this paper, a digital image compression method based on a VQ coding technique is presented. Genetic algorithm(GA) is used to generate a good optimal codebook. In the genetic algorithm, it is proposed that moveable genes be used to improve the computing effect of the algorithm. Both the encoding and decoding have been simulated on a computer and the reconstructed images and experiment results show that the algorithm is reliable. The method may be applied to compression coding for all still image sequences. Also the genetic algorithm may be used in other optimal fields.

최근 10년간 원광의대병원에서 시행한 소아 심장혈관 수술의 임상적 고찰

윤향석,정수미,최두영,오광수,오연균,김종덕,양현웅,이삼윤,김형곤,최종범,최순호,노병석 圓光大學校 醫科學硏究所 1995 圓光醫科學 Vol.11 No.2

We reviewed 10 years experiences of the clinical aspects and early postoperative results in 544 pediatric patients(age less than 16 years old). Among them. 529 cases had the congenital heart diseases, and 15 had the acquired diseases. Open heart surgery was performed in 413 patients. 115 cases were treated with non-open heart surgery. 16 with interventional catheterization. Annual increase of the cardiac patients was not significant in recent 10 years, except slight increase in 1994. The mean age of the study patients had been evidently changed to younger year by year. Total mortality rate of the open heart surgery was 6.4%. The cyanotic congenital heart diseases were high in early postoperative mortality by 25.7%, whereas 4% in acyanotic group. The age group less than one month was most highest in surgical mortality(66.7%). There were no deaths in patients with patent ductus arteriosus(103 cases), atrial septal defect(83 cases) or pulmonary stenosis(17 cases). Among 220 patients with ventricular septal defects(VSD). 10(4.5%) were died early postoperatively. In cyanotic group, the patients with pulmonary atresia with ventricular septal defects(PAVSD), transposition of the great arteries(TGA), interrupted aortic arch(IAA), complex cardiac anomalies with isomerism seemed to be most susceptible to an early death.

하안검내층 재건을 위한 비중격 점막연골 이식과 구개 점막이식과의 비교

이향주,이택종 大韓成形外科學會 1990 Archives of Plastic Surgery Vol.17 No.2

An eyelid is composed of three layers: an outer layer of skin, an inner layer of mucosa, and a semirigid tarsal plate interposed between them. Therefore, the reconstruction of an eyelid requires restoration of these elements. In reconstructing the lower eyelid the mucosa is replaced and additional support is necessary in order to overcome gravity and cicatrical contracture. We have experienced 8 cases of lower eyelid reconstruction since June,1984. In 6 cases lower eyelid cancer has been developed close to margin, 1 case was congenital syphilis and 1 case was post traumatic defect. The inner layer of lower eyelids was reconstructed with nasal septal mucochondral grafts in 4 cases and palatal mucosal grafts in 4 cases. For outer layer of lower eyelid we used various flaps; cheek rotation flaps in 5 cases, cheek rotation flap and temporal flap in 1 case, and orbicularis oculi myocutaneous flaps in 2 cases. We followed the patients comparing the palatal mucosal graft with the nasal septal mucochondral graft and concluded: 1. The nasal septal mucochondral graft apperaed to be more natural. 2. A tendency of the nasal septal mucochondral graft to curl towards the mucosa-covered side after thinning of the cartilage was an additional merit. 3. Both palatal mucosal graft and nasal septal mucochondral graft maintained stable margin of the lower eyelids. 4. Thick, mucoid secretion was troublesome in palatal graft group. Nevertheless, patients were tolerale in 2 or 3 months. 5. If the nasal septum was destroyed or deformed,palatal mucosa is advisible for inner layer of eyelid.

혼합형 유전자 알고리즘을 이용한 그래프 분할

김향태,양종현 광주대학교 산업기술연구소 2002 産業技術硏究 Vol.16 No.-

문제의 복잡도가 매우 큰 경우에는 순수한 유전자 알고리즘으로는 한정된 시간과 비용으로 만족할만한 품질의 해를 얻기에는 많은 어려움이 따른다. 또한, 유전자 알고리즘이 지역 최적점 근처에서 미세 조정 기능이 약하다는 것과 밀접한 관계가 있다. 본 논문에서는 미세 조정을 위해 지역 최적화 알고리즘을 유전자 알고리즘과 결합한 혼합형 유전자 알고리즘(Hybrid Genetic Algorithm; HGA)을 제한한다.

맹출성 복잡치아종 : 증례보고 A Case Report

오유향,박종휘,박헌동,설재헌,이병채 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1

Odontomas, hamartomas of odontogenic origin, are composed of all the structures that make up teeth The WHO distinguishes odontoma into two types. The complex odontoma is defined as "a malformation in which all the dental tissues are represented. individual tissues being mainly well-formed but occurring in a more or less disorderly Pattern." The compound odomtoma is defined as "a malformation in which all the dental tissues are represented in a more orderly pattern than in the complex odontoma so that the lesion consists of many tooth-like structures. Most of these structures do not resemble morphologically the teeth of normal dentition, but in each one enamel, dentin, cementum and pulp are arranged as in the normal tooth." Although these tumora occur frequently and constitute 22% of all odontogenic tumors, reports on erupted odontomas are very rare. Erupted odontoma are defined as tumors that it occurs a calcified mass may be defected on the alveolar ridge. The final diagnosis should be confirmed by biopsy. The treatment of choice is complete surgical excision, similarly to intraosseous odontoma and it does nat tend to recur. The histopathological report confirmed the diagnosis of complex odontoma. This report presents a case of 8-year-old girl with the calcified mass within the operculum covered the central fossa of the mandibular left fkrst molar. And it was diagnosed as erupted complex odontoma by excisional biopsy.

헤드램프 반사경 곡면 모델링에 관한 연구

박정향,사종엽 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.2

The surface modeller has been developed for designing efficiently the reflector shape of headlamps. The surface and curves has been represented by using NURBS (Non-Uniform Rational B-Splines). IGES format has been supported for data exchange among other 3D CAD systems such as CATIA. The triangular surface mesh generation has been mounted on the surface modeller for other simulation and design. The OOP (Object-Oriented Programming) technique has been used completely for all of above-mentioned modules, such as NURBS representation, surface modeller, IGES support, triangulation of surface mesh, and GUI (Graphic User Interface). The actual reflectors designed on CATIA has been tested and imported successfully into the present program.

관동맥 우회로 이식술후 우회 혈관의 개존 여부 평가에 있어 전자선 단층 촬영을 이용한 3차원 혈관조영술의 유용성

하종원,조승연,심원흠,정남식,이향미,최규옥,장양수,유경종,강면식 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.5

다단계 BTC에 대한 유전자 알고리즘 설계

양종현,김향태 광주대학교 1999 産業技術硏究 Vol.13 No.-

본 논문에서는 다단계 BTC 부호화의 설계에 대한 새로운 스키마를 제안한다. 최적의 양자화는 상세한 탐색으로 양자화 초기값을 선택함으로써 얻을 수 있다. 그러나, 이것은 거대한 양의 계산결과를 요구하고, 또한 다단계 BTC에 대한 상세한 탐색을 고려했을 때 비현실적이다. 원래의 이미지와 재구성된 이미지 사이의 AMSE(average mean square error)가 최소이기 위한 더 좋은 초기 값 유지하기 위해서 유전자 알고리즘을 적용한다. 상세한 탐색으로 제안된 방법의 결과치를 비교하면 전자의 방법이 대부분 후자의 경우에서 요구된 것 보다 훨씬 적은 계산량으로 적절한 양자화를 달성할 수 있다. In this paper, a new scheme for designing multilevel BTC coding is proposed. Optimal quantization can be obtained by selecting the quantization threshold with an exhaustive search. However, this requires an enormous amount computation and is, thus impractical when we consider an exhaustive search for the multilevel BTC. In order to find a better threshold so that the average mean square error between the original and reconstructed images is a minimum, the genetic algorithm is applied. Comparison of the results of the proposed method with the exhaustive search reveal that the former method can almost achieve optimal quantization with less computation than that required in the latter case.

한국인 여성의 자궁경부암에서 PCR을 이용한 Human papillomavirus 아형의 검출에 관한 연구

김향우,전호종,김윤신,장원재,이미숙,이미자 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

The polymerase chain reaction (PCR) was used for detection of human papillomavirus (HPV) in paraffin-embedded tissue. Tissues stored as paraffin blocks were a potential source of DNA for retrospective clinicogenetic analysis. Sections in 6 ㎛ (three or five) thick cut from paraffin blocks of 29 uterine cervix dysplasia, 34 uterine cervix carcinoma in situ, 42 uterine cervix squamous cell carcinoma and 10 uterine cervix metaplasia samples were deparaffinized and incubated at 37℃ for 48hrs. in the lysis solution. Following organic extraction and alcohol precipitation, and extracted DNAs were identified by gel electrophoresis. These DNAs carried out PCR. After repeated cycles of specific oligonucleotideprimed extension of viral DNA with thermophilic DNA polymerase. the type of HPV present was then determined on the basis of the size of the ethidium-bromide stained band visible after agarose gel electrophoresis : for HPV 6 is 263 bp. for HPV 11 is 144 bp, for HPV 16 is 601 bp. and for HPV 18 is 360 bp. This study detected HPV DNA in four cases. which broke down to HPV 16 in two case of uterine cervix carcinoma in situ and two case of uterine cervix squamous cell carcinoma, no HPV type in the remainder. Histologically, HPV types 6, 11 are mainly detected in benign genital warts and lowgrade cervical dysplasias, squamous cell carcinoma frequently contained HPV 16, whereas, HPV 18 was present in adenocarcinoma, adenosquamous cell carcinoma and small cell carcinoma of the cervix. These results indicate that cervical cancers might be clinically influenced by the differences in sutible of the infecting HPV.