반복작업으로 유발된 수근관내의 굴곡근 건초염과 수근관 증후군 : 증례 보고 Case Report

김돈규,서경묵,신주연,강시현,송인섭 중앙대학교 의과대학 의과학연구소 2003 中央醫大誌 Vol.28 No.1

A 46 year-old woman who had worked repetitive manual job for 3 years visited our hospital because of aggravated right hand sensory symptom and newly developed limitation of 3, 4, 5th finger extension. In physical examination, moderate swelling of volar aspect of wrist and limitation of finger extension was noticed as well as positive tinnel sign. We confirmed carpal tunnel syndrome after electrodiagnostic studies and associated flexor tenosynovitis of 4th flexor tendon in the carpal tunnel through MRI (magnetic resonance imaging) study. She was successfully treated with conservative program including wrist splint and steroid injection. We also tracked the result of treatment using MRI and electrodiagnositic studies. Analyzing her work procedure, we concluded that repetitive and forceful exertional nature of job impose a high burden on hand and wrist region and it caused her carpal tunnel syndrome.

유치 치근단 염증에 의한 계승치 맹출장애의 일예

김철훈,임두영,황인성,손홍규,최돈옥 大韓小兒齒科學會 1982 大韓小兒齒科學會誌 Vol.9 No.1

This is a case report of difficult eruption of succeeding permanent tooth by periapical inflammation of primary tooth. 12-year-8-month-old girl who had been treated by pulpotomy of lower right second primary molar about 4 years ago was recalled for prolonged retention of it. Radiographs showed periapical inflammation of lower right second primary molar and horizontal buccal impaction of succeeding permanent tooth. Right second premolar seemed impossible to erupt so surgical extraction of it was done with removal of lower right second primary molar and resin space maintainer was manipulated for prevention of space closure and elongation of opposing tooth.

Polyurethane의 혈전방지처리가 Staphylococcus epidermidis의 정착에 미치는 영향

김성민,이규백,백경란,오명돈,민병구,최강원 대한감염학회 1996 감염 Vol.28 No.1

목적 : 최근 생체재료로 만든 각종 카테타와 인공관절, 인공심장 등 인공장치의 사용이 점차 증가하고 있으며, 인공장치의 사용을 제한하는 가장 큰 합병증은 생체재료를 중심으로 일어나는 감염과 혈전증이다. 그러므로 인공장치를 장기간 사용하기 위해, 이들 합병증을 예방할 수 있는 생체재료를 개발하는 것이 중요한 과제가 되고 있다. 인공장치는 체내에 들어가서 혈액과 접촉하게 되면, 혈장단백질과 혈소판이 부착하고 활성화되어 혈소판-섬유소 혈전을 만든다. 이렇게 형성된 혈전은 세균의 부착을 촉진하고, 부착한 세균이 인체방어기전이나 항균제의 영향을 받지 않고 증식 할 수 있는 공간이 된다. 또한 정착한 세균은 혈액과 접촉하여, 혈전의 형성을 촉진한다. 즉, 혈전과 세균정착은 서로 영향을 주면서 인공자치의 오랜 사용을 제한하게 된다. 폴리우레탄에 설폰산과 알부민을 표면처리하면 혈전의 형성이 감소하는 효과가 있다는 것은 보고된 바 있으나, 혈전방지를 위해서 표면처리에 사용한 설폰산, 알부민이 세균 정착 및 감염에 미치는 영향에 대해서는 아직 잘 알려져 있지 않다. 이에 저자들은 설폰산, 알부민, 파라벤으로 처리한 폴리우레탄이 세균의 정착에 미치는 영향에 대해 알고자 본 연구를 시행하였다. 방법 : S. epidermidis RP12 부유액(?/mL)에 대조 폴리우레탄과 설폰산과 알부민, paraben으로 각각 처리한 폴리우레탄을 원반모양으로 만들어 담근 다음, 24시간 또는 48시간 동안 배양하였다. 세균 정착의 정도는 세균 집락수 및 SEM 소견으로 판정하였다. 결과 : 24시간 째 및 48시간 째의 세균집락수는 대조 폴리우레탄이 각각 8.3x10⁴/mL, 1.1×?/mL이었고, 파라벤 처리 폴리우레탄이 각각 9.3x10⁴/mL, 2.1x10⁴/mL (p<0.05), 설폰산 처리 폴리우레탄이 각각 1.2×?/mL, 8.2x10⁴/mL,(p<0.05), 알부민 처리 폴리우레탄이 각각 7.3×?/mL, 1,4×?/mL (p<0.05)이었다. 즉, 세균 집락수가 파라벤 처리 폴리우레탄에서는 유의하게 감소하였으나, 설폰산 처리 폴리우레탄에서는 증가하였다. SEM 소견에서는 설폰산 및 알부민 처리 폴리우레탄에서 세균 정착의 감소를 관찰하지는 못하였다. 결론: 본 연구는 in vitro 실험으로, 파라벤으로 처리한 폴리우레탄은 세균의 정착을 감소시키는 효과가 있었으나, 항혈전성 폴리우레탄은 세균 정착을 감소시키지 못하였다. 인체내에서는 세균과 혈소판, 혈장단백질이 복잡하게 반응을 하면서 혈전과 세균 정착이 서로 영향을 주므로, 인체내에서는 항혈전성 폴리우레탄이 혈전 형성을 감소시키고, 2차적으로 세균 정착을 감소시키고 감염을 예방하는 효과가 있을 가능성도 있으므로 이에 대한 연구가 진행되어야 하겠다. Background : Infection and thromboembolism are major complications of prolonged use of prosthetic devices, such as various catheters, prosthetic joints, and artificial hearts, frequently resulting in severe morbidity, or death. Therefore, the prevention of infection and thrombosis is an important subject in developing new biomaterials of prosthetic devices. The first event on insertion of a prosthetic device into the blood is protein adsorption and activation with platelet adhesion, activation and aggregation, leading to the formation of platelet-fibrin thrombi. The thrombi are susceptible to bacterial incorporation and protect the bacteria from the effects of circulating antibodies, phagocytic cells, and antibiotics. Furthermore, adherent bacteria may induce fibrin and platelet adhesion. Sulfonated polyurethane and albumin-immobilized polyurethane were documented to diminish the adhesion and shape-change of platelet on the polymer in comparison with plain polyurethane, in vitro. The objective of this study was to evaluate the effect of these antithrombotic biomaterials on the bacterial colonization. Methods : Plain, sulfonated, albumin-immobilized, and paraben-incorporated polyurethane(PU) films were prepared as a disk form. Staphylococcus epidermidis RP12 was suspended at a concentration of ?/mL and four types of polymeric disks were immersed in the bacterial suspension. After incubation for 24 and 48 hours, the bacterial colonization on the each disk was determined by the colony forming units(CFU) counting method. The colonized disks were examined by scanning EM. Results : The paraben decreased significantly the number of CFU on PU surface to 2.1x10⁴/mL after 48 hours, compared with 1.1×?/mL on plain polymers. The number of CFU on sulfonated or albumin-immobilized PU was 8.2x10⁴/mL, and 1.4×?/mL, respectively. SEM micrographs showed no reduction of colonization on antithrombotic PUs. Conclusion : Antithrombotic treatments of polymers did not decrease the bacterial colonization on polymers, in vitro, that was compared to the decreasing effect of paraben. However, because the thrombi and bacteria interact with each other, the overall effect of the antithrombotic polyurethanes on the bacterial colonization and infection should be studied in vivo.

후천성 이중 유문 1예

정규성,조기섭,정재용,조영호,민영돈,박찬국,김만우 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.1

Double pyrolus, one of the relatively rare anomalies of the gastrointestinal tract, is a fistulous communication between the gastric antrum and the duodenal bulb. The first case of a double Pylorus was reported in 1969 by Smith, since then several cases have been reported. Recently, as the frequency of examining upper gastrointestinal series and endoscopy increases, it occurs more frequently and a few cases have been described in our country. According to the reports previously published, it resulted only from cysts, diverticla, atresia, band, membrane malformation of the pylorus, however, it might be also caused by penetration, complication of peptic ulcer. We report a case of double pylorus in a 67-year old man with prolonged administration of corticostetoids due to lumbago who has complained epigastric pain which was confirmed by endoscopy and biopsy.

유압 모터 시스템에 대한 극점 배치 제어

황규동,이창훈,조영돈,김도석 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-

Pole Placement Control has been well establish in its theory. However, its practice value is yet to be appreciated in most industries. This paper presents an account in which the control strategy is run on the hydraulic motor. Using the input and output data from actual system, estimation of the model parameters are obtained by a function ARMAX(Autoregressive Moving Average with am exogenous signal) in Matlab and controller synthesis is achieved by a Pole placement control. Estimation system from a ARMAX is defined by third order and application of Pole placement control technique will be provide not only stability but also good performance for motion of hydraulic motor in any operation condition.

고속전철 추진 시스템의 미끄럼 방지 제어기법에 관한 연구

황돈하,김동희,노채균,심광열,조규판,정원영 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.2

Induction motor drive with PWM inverter control has been developed for Korean High Speed Railways. To improve traction performance, the anti-slip control(ASC) to recover adhesion must be considered. This paper describes a novel hybrid anti-slip control method for the induction motor drive. By introducing the vector control for drive system, quick response of the motor torque can be achieved when wheels are going to slip. A hybrid control scheme by mixing two conventional control methods (slip velocity feedback control and slip detection pattern control) for wheel slip and re-adhesion is proposed. This control method is simulated by motor drive, train load, and friction-creep models. The train running simulation results based on induction motor vector control with PWM inverter show that good re-adhesion characteristics are obtained.

염처리에 따른 벼 遊離 Proline 축적과 생육반응

정진일,김기영,최돈향,오명규,이승엽,이동진 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.4

염처리에 따른 무기성분 흡수 및 Proline 축적등을 비교하여 수도의 내염성 품종육성의 기초자료를 얻고자 Annapurna를 대비품종으로 일반계 6품종, 통일계 5품종을 공시하여 얻은 결과는 다음과 같다. 1. 초장, 건물중 및 고사율은 염처리시 감소하였으며, 시간이 경과될수록 감소율이 증가하였다. 2. K/Na비와 건물중 감소율 및 고엽율과는 부의 상관을 보였다. 3.proline 축적은 염농도가 증가함에 따라 증가하였으며 일반계품종들이 통일계품종들보다 축적량이 높았다. 4. Proline 함량과 건물중비율과는 정의 상관을 보였다. In other to find out the basic information on cultivation and breeding for salt tolerance in rice, these studies were conducted in treatment hydroponics added in NaCl using 6 Japonica type varieties and 5 Tongil type varieties compared to the salt tolerance variety, namely Annapurna. The following results were obtained. Plant height, ratio of dry weight and ratio of dead leaf were decreased with increasing periods of salt treatment. Negatively significant correlation was observed between Rario of K/Na were highly negative correlated with the rate of dead leaf and rate of dry weight. The accumulation of proline increased as the salt content higher. The content of proline was positively correlated with the ratio of dry weight after salt treatment.

충남대학교병원 마취발전의 경향에 관한 분석 : 1967년부터 - 1996년까지 from 1967 to 1996

최세진,김상수,정규돈,윤석화,신용섭,손수창,이원형,김혜자,이정은 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

To evaluate the specificity and historical trends of the anesthesia in Chungnam National University Hospital, anesthetic experiences of 83,572 in total performed at Chungnam National University Hospital from January 1967 to December 1996 were analyzed statistically and clinically according to age, sex, surgical department, physical status, elective and emergency surgery, premedicants, IV anesthetics, anesthetic methods, inhalational anesthetics, muscle relaxants. The results were as follows : 1. The number of cases has been steadily increased year by year. 2. The ratio of male to female was 52.8% : 47.2%. 3. According to the age, There were 44,905 cases (54%) in the group of 13-45 years. 4. According to the ASA classification of physical status, most of the cases were belonged to the class 1 & 2 (72.5%). 5. The ratio of elective to emergency was 79.4% to 20.6%. 6. Recently, glycopyrrolate has been used increasingly. 7. Thiopental sodium has been mainly used for intravenous induction agent. 8. General anesthesia has been used mainly. 9. Enflurane is the most common inhalational anesthetic agent. but Isoflurane has been used increasingly. 10. Most of muscle relaxants are Pancuronium & Vecuronium(84.5%).

아마추어 골퍼에서의 골프 관련 통증의 발생 빈도 및 분포

서경묵,김돈규 대한스포츠의학회 2003 대한스포츠의학회지 Vol.21 No.1

The purpose of this study is to investigate prevalence of golf-related pain and understand the regional distribution of golf-related pain and associated factors. We sended e-mail questionnaire to one thousand thirty four amateur golfers among members of a internet golf site in the period from August, 2001 to December, 2001. There were 602 respondent of whom 63.5% reported recent pain associated with golf activity. Based on regional pain distribution, upper extremity including shoulder, elbow, wrist and hand was the most common area of pain complaints, followed by spine, lower extremity, fib and chest in order. Based on anatomical distribution, back was the most common pain site. Overuse factor like number of round per week was associated with golf-related pain. Golf itself imposes relatively more burden on upper extremity and spine. Among risk factors, overuse was associated with development of golf-related pain.

문자영상 紬線化에서의 雜音除去 알고리즘에 관한 연구

전병민,박규태,김상운,이기돈 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2

In this paper, we study thinning algorithms which are peeling off successive contours of the character image to be thinned while keeping the connectivity of the skeleton in the process. Noise rejection algorithm is proposed for the purpose of removing the common short-comings of thinning algorithms when applied to hand-printed data. The algorithm consists of the three processings: preprocessing, thinning, and postprocessing. The preprocessing smooths down the originally-thick image and the postprocessing leads to the well-groomed skeleton. The noise rejection algorithm is implemented with FORTRAN language and tested through a CYBER170-825 computer system.