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박석원,김황민,김종수,차재국,이혜란,Park, Seok Won,Kim, Hwang Min,Kim, Jong Soo,Cha, Jae Kuk,Lee, Hae Ran 대한소아청소년과학회 2002 Clinical and Experimental Pediatrics (CEP) Vol.45 No.5
목 적 : 최근에 증가하고 있는 우리나라 어린이들의 비만 정도를 살펴보고, 비만이 운동 전후의 폐활량에 미치는 영향을 보고자 본 연구를 시행하였다. 방 법 : 원주지역 초등학교 5곳의 4-6학년 학생 2,000명 중 신장별 체중 50 백분위수를 표준 체중으로 이용한 비만도가 20% 미만인 대조군 150명과 20% 이상이었던 비만군 257명을 대상으로 하였다. 2000년 10월부터 11월까지 2개월 동안 대상군을 정상, 경도비만, 중등도비만, 고도비만의 4군으로 분류하여 운동부하 전 및 후의 폐활량을 측정하였으며, 각 군간의 폐활량을 예측치에 대한 백분율로 환산하여 비교분석 하였다. 결 과 : 1) 비만에 해당하는 대상은 총 257명(19%)이었으며, 경도비만군 147명(10.9%), 중등도비만군 87명(6.4%), 고도비만군 23명(1.7%), 대조군은 150명이었다. 2) 각 군에서 측정한 $FEV_1$ 및 FVC의 예측치에 대한 백분율(%)은 대조군에서 $95.4{\pm}15.8$, $96.3{\pm}14.7$ 경도비만군에서 $88.7{\pm}10.4$, $88.5{\pm}9.6$ 중등도비만군에 서 $90.3{\pm}11.0$, $87.8{\pm}10.5$ 고도비만군에서 $75.5{\pm}8.6$, $79.3{\pm}9.3$이었으며, 대조군, 경도비만군, 중등도비만군 간에 통계학적으로 유의한 차이는 보이지 않았으나, 고도비만군에서는 다른 군에 비하여 통계학적으로 유의하게 낮았다(P<0.05). 3) PEFR의 예측치에 대한 백분율(%)은 대조군에서 $102.7{\pm}16.4$, 경도비만군에서 $92.0{\pm}11.0$, 중등도비 만군에서 $86.0{\pm}12.4$, 고도비만군에서 $74.0{\pm}9.5$이었으며, 대조군에 비해 비만군 모두에서 통계학적으로 의의있게 낮았고, 비만도가 높을수록 최대호기속도는 감소하였는데, 이는 모두 통계학적으로 유의한 차이를 보였다(P<0.05). 4) 운동부하 후 측정한 $FEV_1$, FVC, PEFR 모두, 89명(21.9%)은 운동부하 후 5분, 173명(42.5%)은 10분, 145명(35.6%)은 운동부하 후 15분에 가장 낮은 측정치를 보였다. 5) 운동부하 후 $FEV_1$, FVC, PEFR 측정치의 예측치에 대한 백분율(%)은 대조군에서 각각 $90.4{\pm}16.7$, $89.7{\pm}15.0$, $94.5{\pm}16.6$ 경도비만군 $77.1{\pm}10.5$, $74.2{\pm}9.7$, $77.2{\pm}11.6$ 중등도비만군 $76.2{\pm}11.1$, $71.3{\pm}11.4$, $68.5{\pm}13.0$ 고도비만군 $59.8{\pm}9.1$, $55.7{\pm}8.8$, $52.0{\pm}8.9$로 각 군 모두에서 운동부하 전 측정한 각 항목의 예측치에 대한 백분율보다 통계학적으로 의의있게 감소하였다. 그리고 운동부하 전 및 운동부하 후 각 항목 측정치의 예측치에 대한 백분율 차이는 비만도가 높을수록 컸으며 이는 모두 통계학적으로 유의한 차이를 보였다(P<0.05). 결 론: 운동부하 후 발생하는 기관지수축 정도는 비만아에서 더 크게 나타나며, 운동부하 전이라도 고도비만아인 경우 기관지폐쇄가 어느 정도는 존재한다고 사료된다. Purpose : The incidence of obesity has increased in Korea recently. Obesity leads to higher risks of hypertension, hyperlipidemia and insulin resistance. It also leads to risks of respiratory complications. This study was performed to see the effects of obesity on children's pulmonary functions and on developed bronchospasm after exercise loading according to their obesity degrees. Methods : 257 obese children and 150 non-obese children were enrolled. Obese children were divided into 3 groups by the obesity degrees. Pre- and post-exercise loading $FEV_1$(forced expiratory volume at one second), FVC(forced vital capacity) and PEFR(peak expiratory flow rate) were checked in all subjects. The percent predicted values of each parameter was compared according to obesity degrees and the differences between pre-exercise and post-exercise values. Results : The percent predicted value of $FEV_1$, FVC decreased only in the severe obesity group compared with those in the control group. However percent predicted PEFR declined according to obesity degrees. The percent predicted value of $FEV_1$, FVC and PEFR after exercise loading were much lower than those before exercise loading in all groups. Conclusion : As the degree of obesity was higher, the percent predicted value of pulmonary function was lower. And after exercise loading, as the degree of obesity was higher, the reduction of percent predicted value of pulmonary function was larger. Therefore the pulmonary function in obese children must be observed carefully. Further studies on the effects of pulmonary functions in obese children are necessary.
Rifampin으로 폐결핵 치료 중 발생한 혈소판 감소증 1례
박석원,조희숙,김황민,임백근,김종수,Park, Seok Won,Cho, Hee Suk,Kim, Hwang Min,Lim, Baek Keun,Kim, Jong Soo 대한소아감염학회 2000 Pediatric Infection and Vaccine Vol.7 No.2
저자들은 흉막삼출액을 동반한 폐결핵으로 입원한 13세 여아가 isoniazid 및 rifampin으로 치료 중 혈소판 감소증을 보였으며, 혈소판이 정상으로 회복된 후 리팜핀의 재투여로 발생한 혈소판 감소증 1례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Rifampin is a bactericidal antibiotic used primarily in the treatment of tuberculosis. The adverse effects of rifampin, though few, include dermatologic, gastrointestinal, and hepatic manifestations. Occasionally it produces a flu-like syndrome, interstitial nephritis, hemolytic anemia, and thrombocytopenia. These manifestations usually appear in patients who take the drug intermittently. We experienced a 13 year-old girl who developed thrombocytopenia during rifampin administration of daily dosage, therefore we report a brief review with the related literatures.
유리섬유/폴리프로필렌 복합재료 (Twintex)를 이용한 고정판 성형조건에 관한 연구
박석원 ( Seok Won Park ),유성환 ( Seong Hwan Yoo ),이재응 ( Jae Eung Lee ),장승환 ( Seung Hwan Chang ) 한국복합재료학회 2010 Composites research Vol.23 No.6
본 연구에서는 열가소성 복합재료인 유리섬유/폴리프로필렌 복합재료를 이용한 복합재료 고정판의 적절한 성형조건을 찾기 위해 다양한 성형조건으로 제작된 시편의 인장실험과 굽힘실험을 수행하여 성형조건에 따른 기계적 거동을 비교하였다. 실험결과 성형온도와 압력이 각각 230℃, 3MPa일 때 가장 우수한 기계적 특성을 가짐을 확인하였다. 성형실험을 통해 결정된 성형조건을 이용한 복합재료 고정판의 성형방법으로는 고정판의 스크류 구멍을 한번에 성형하는 정형성형방법과 스크류 구멍을 후가공하는 방법을 사용하였으며, 성형실험과 굽힘실험 결과 스크류 구멍을 후가공 하는 경우 우수한 굽힘특성을 가지는 것을 확인하였다. 본 논문에서는 복합재료 고정판의 적절한 성형을 위해 유리섬유/폴리프로필렌 복합재료의 기초 성형정보와 그에 따른 고정판 성형에 대한 연구를 수행하였으며, 이 결과는 해당재료를 이용한 구조물 성형에 중요한 정보를 제공할 것으로 기대된다. In this paper, tensile and bending tests of glass/polypropylene composite (Twintex) specimens fabricated by various forming conditions were carried out and the results were compared according to the forming conditions to find the appropriate condition for the forming composite bone plates. From the tests it was found that the most appropriate forming conditions were 230℃, 3MPa. Composite bone plates were formed using this condition by two different fabricating methods for screw holes: one was a net shape molding and the other was drilling. The forming and bending tests revealed that the drilling process provided much better bending stiffness of bone plates. This paper provided the most appropriate condition for forming composite bone plates and this result was also expected to offer informative data on forming of other Twintex structures.
박석원(Seok Won Park),이수영(Soo Young Lee),정병주(Byeung Ju Jeoung),김규언(Kyu Earn Kim),이기영(Ki Young Lee) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1993 소아알레르기 및 호흡기학회지 Vol.3 No.2
N/A The congenital cystic adenomatoid malformation (CCAM) of the lung is the second most common congenital lung disease consisted of one or usually multiple interconnecting cysts in the pulmonary parenchyma lined by cuboidal and columnar epithelium. We have experienced 7 patients of congenital cystic adenomatoid malformation of the lung during last 10 years. They had various respiratory symptoms, which were fever, cough, dyspnea, tachypnea etc. They were diagnosed by chest X-ray and confirmed by chest CT scan which showed single or multiple, various sized cystic lesions on any fields of the lung. Surgical treatment was taken on 4 patients, and conservative management on 3 patients. The prognosis is better in patients who took operation than in patients who took conservative management.
박석원(Seok Won Park),조희숙(Hee Suk Cho),최원규(Won Kyu Choi),김황민(Hwang Min Kim),임백근(Baek Keun Lim),김종수(Jong Soo Kim) 대한천식알레르기학회 2001 천식 및 알레르기 Vol.21 No.1
Background and objective: There is a common progression known as the allergic march from atopic dermatitis to allergic asthma. There are many risk factors affecting allergic march such as expanded exposure to multi-allergens, family history of atopy and other environmental factors etc. In this study, we tried to check PEFR in atopic dermatitis children before development of asthma and to determine whether the PEFR can be a predicting factor of asthma. Methods : Nineteen atopic dermatitis children(group A), 21 atopic dermatitis children with asthma(group B) and 25 control children were enrolled in this study. We checked the PEFR in each subject and calculated the % predicted value. We compared the value of PEFR in each group. Results : Males were predominant in all study groups and the mean ages of the subjects were 5.9 years in group A, 6.8 years in group B, and 8.7 years in control group. The % predicted values of PEFR were 86.57±7.32 in group A, 88.16±10.33 in group B, and 100.68±17.56 in control group. There was a significant difference of PEFR between group A and control group. Additionally, the PEFR in house dust mite sensitive group was lower than that of house dust mite allergen insensitive group among atopic dermatitis group. Conclusion : The lower value of PEFR in atopic dermatitis group suggests that there is some degree of pulmonary obstruction, even if bronchial asthma does not occur. Therefore, the PEFR of atopic dermatitis can be a predicting factor for the development of asthma. (J Asthma Allergy Clin Immunol 21: 50-56, 2001)