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김재택(Jae Tack Kim),공병호(Byeong Ho Kong),최성남(Sung Nam Choi),배현철(Hyun Chul Bae),김광석(Kwang Seok Kim),정현경(Hyun Kyung Chung),오연상(Yeon Sahng Oh),신순현(Soon Hyun Shinn) 대한내과학회 1999 대한내과학회지 Vol.56 No.5
Chronic cough is defined as a cough that lasts for more than three weeks. In most patients, chronic cough is caused by four conditions: postnasal drip, asthma, chronic bronchitis, gastroesophageal reflux. Psychogenic chronic cough is not a frequent disorder. Furthermore, chronic vocal tic disorder is a very rare cause of chronic dry cough. A 22- year-old male suffered from chronic dry cough for last two years. His character showed obsessive- compulsive disorder. He has been shrugging both shoulders inadvertently since his childhood. Consequently, he was diagnosed as having chronic motor tic disorder. But after contracting respiratory tract infection, his motor tic disappeared and chronic dry cough was developed concomitantly. He had no history of smoking, chronic rhinitis, sinusitis, asthma, and gastroesophageal reflux. Physical examinations were normal. Chest X-ray, paranasal sinus view, metacholine bronchial provocation test, and esophago-gastroscopy were normal. Chronic cough was never relieved despite empirical treatment. Psychiatric consultation suggested chronic vocal tic disorder. The frequency of cough was diminished two days after administeration of valium and haloperidol and thereafter his complaint disappeared in one month. Here we report a very rare case of chronic motor tic disorder which was transformed into chronic vocal tic disorder presenting as a chronic cough. As far as we know, this is the first case of its kind in Korea.
김연상,Kim, Yeon-Sang 한국과학기술단체총연합회 1995 과학과 기술 Vol.28 No.1
건축자재 전문제조업체로 20년 전통을 자랑하는 (주)럭키건업은 최근「세라믹 하이텍 팬널」이라는 건축용 내외장재인 신제품을 개발, 각광을 받고 있다.
Stab Resistance of Woven and Nonwoven Aramid Fabric Composites
김연상,정기수,Tien, Duong Tu,Kim, Yeon-Sang,Chung, Gi-Soo 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.4
Various composite armors of woven and nonwoven fabrics were tested to develop an effective new, lighter and less expensive body armor. Woven and nonwoven aramid fabrics were prepared separately and their stab resistances were tested. They were then used to prepare pliable composites, whose stab resistances were tested. The optimal composite satisfied all the armor's requirements with reasonable weight and thickness.
흉강경을 이용한 측만증 교정술 후 척추 체 축상회전의 변화
오성균(Sung Kyun Oh),정성수(Sung Soo Chung),강창석(Chang Suk Kang),김연상(Yeon Sang Kim),곽봉준(Bong Jun Kwag),이종서(Chong Suh Lee) 대한정형외과학회 2008 대한정형외과학회지 Vol.43 No.5
목적: 흉강경을 이용한 측만증의 전방 교정술시 효과적인 측만증의 반회전이 일어나는 지와 기기 술이 이루어진 분절 내와 그 원위 및 근위 부에서의 회전의 양상을 알아보고자 하였다. 대상 및 방법: 특발성 측만증환자 20명에서 술 전과 술 후에 척추 전장에 걸친 자기공명 검사를 시행하였고 이들에서 각각의 척추 체에서의 횡단면상을 얻어 Aaro씨 방법을 이용하여 수술 전 후의 척추 체의 축상 회전각을 측정하였다. 첨추체 부위, 기기 술 근위부위 및 윈위부위, 그리고 기기 술이 이루어지지 않은 척추 체로의 분절 이행부위에서의 척추 체 반회전각을 비교하였다. 또한 각각의 부위에서의 분절간 회전과 분절간 반회전 정도를 계산하였다. 통계적 분석은 2원 배치 분산분석 (2-way ANOVA) 및 Wilcoxon 부호순위 검정을 이용하여 분석하였다. 결과: 첨추체 부위에서의 평균 축상 회전각은 술 전 10.1도였으며 술 후 5.3도로 평균 48%의 축상 회전 교정율을 얻을 수 있었다. 첨추체 부위에서의 반회전은 기기 술 근위부 및 원위부에 비해 큰 값을 보였으며 원위부에서는 유의한 반회전은 일어나지 않았으나(p=0.023) 근위부의 경우는 의의 있는 반회전을 보였다(p<0.001). 술후 기기 숨이 이루어지지 않은 근위 및 원위부의 첫 척추체는 기기 술 끝 척추의 방향과 동일한 방향으로 의의 있게 회전하였다. 분절간 회전은 기기 술 근위부 및 원위부에서 술 전과 술 후에 모두 첨추체부위 보다 더 큰 값을 보였지만 분절간 반회전은 기기 술이 행해진 근위부 및 원위부 그리고 첨추체 부위 모두에서 균일하게 일어났다. 기기 술이 이루어 지지 않은 분절 이행 부위에서는 술 전 분절간 회전은 기기 술이 행해진 근위부나 원위부와 동등한 값을 보였지만 수술 후 분절간 반회전은 경미하였다. 결론: 흉강경을 이용한 측만증의 전방 교정술은 각 척추 체의 반회전과 분절간 반회전을 통해 효과적인 회전변형에 대한 교정이 이루어지는 것으로 생각된다. Purpose: In this study, we investigated whether thoracoscopic anterior correction can effectively derotates the scoliotic spine and we also evaluated the patterns of derotational changes inside the instrumented area and at the junction between the instrumented and un instrumented area. Materials and Methods: Preoperative and postoperative MR images with single axial cuts through each vertebral level were obtained in 20 patients who underwent thoracoscopic anterior instrumentation. Each vertebral rotation was measured by the use of Aaro's method. Vertebral axial derotation of the apical zone (AZ), upper instrumented zone (UIZ), lower instrumented zone (LIZ) and junctional segment were compared. The amount of segmental rotation and segmental derotation in each zone was calculated. Statistical analysis was performed by the use of by 2-way ANOVA and the Wilcoxon signed ranks test. Results: The average axial rotations at AZ were 10.1° preoperatively and 5.3° postoperatively with an average correction rate of 48%. Derotation of the AZ was greater than the UIZ and LIZ. For the LIZ derotation was not significant (p=0.023) while for the UIZ there was a significant derotation (p < 0.001). Postoperatively, the first uninstrumented vertebra rotated significantly in the direction of rotation of the instrumented end vertebra. Preoperative and postoperative segmental rotation was higher in the UIZ and LIZ than in the AZ. However, segmental derotation occurred uniformly in the instrumented area. At the junctional segment, preoperative segmental rotation was same as that of the UIZ and LIZ and segmental derotation was not significant. Conclusion: Thoracoscopic scoliosis correction can achieve effective axial correction by causing derotation of each of the vertebral bodies and segmental derotation.