관절경하 견관절 수술직후 발견된 광범위한 피하기종, 종격동기종 및 양측성 기흉-증례보고

염종훈,신우종,이동호 한양대학교 의과대학 1996 한양의대 학술지 Vol.16 No.2

Subcutaneous emphysema, pneumomediastinum and pneumothorax are used to mean air that appears where it is not normally seen and they also are life-threatening pathologic condition which has to be treaed immediately. Such complications are rare during the operation especially arthroscopic surgery. Recently, we experienced such complications during arthroscopic shoulder surgery in patients without any pulmonary lesions in both preoperative chest X-ray and CT scan taken postoperatively. Such extra-alveolar air can be arised from both chest and extra-alveolar tissue which spread secondarily to the chest, producing mediastinal emphysema. Although the precise mechanism of the subcutaneous emphysema, pneumomediastinum and bilateral penumothorax is not known in this case, transient change of pressure in the joint space relative to atmospheric pressure under the arthroscopy rather than sudden increase in the airway pressure which leads to alveolar rupture during the mechanical ventilation is the suspected one.

Digital Imaging Fiber-Optic Trans-Illumination을 이용한 초기 법랑질 우식병소의 조기 진단

염혜웅,김종수,유승훈 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

치아 우식증의 발생과 관련된 분야에 대한 연구는 지난 20년간 활발히 진행되어 괄목할만한 발전을 이루었다. 그러나 치아 우식증의 원천적인 예방을 이루기 위해서는 보다 새로운 실험 장비와 기구를 이용한 다각적인 연구가 요구되며, 이러한 흐름에 부응하여 미국의 인디아나 치과대학을 중심으로 초기 법랑질 우식증에 관한 재조명이 집중적으로 이루어지고 있다. 또한 세계적으로 치과계의 지속적인 대민 교육과 홍보 및 불소화 사업 등의 우식 예방에 대한 노력과 구강 보건에 대한 대중의 인식 향상을 통해 치아 우식증이 감소하는 추세에 있으며, 이로 인해 치아 우식증이 기존의 교합면보다 인접면에서 더 많이 발견되는 추세로 변화되고 있다. 치아 우식증의 조기 진단을 목적으로 새로운 진단 장비들이 속속 개발되고 있으며 이미 성능의 우수성이 실험실 연구를 통해 입증된 바 있다. 본 연구의 목적은 초기 인접면 우식증의 진단에 있어 새로 개발된 DIFOTI^(TM) 시스템의 효능을 기존의 방법인 사진 및 교익방사선사진과 비교 평가하고, 임상 적용시의 문제점을 파악하여 차후 DIFOTI^(TM) 시스템 개발에 필요한 개선안을 제시함과 아울러 치아 우식증의 예방 및 불소를 이용한 초기 우식증 재광화 방법에 대한 기초 연구 자료를 마련하고자 하였다. 학동기 연령에 있는 유치 탈락 시기에 근접한 것으로 기대되는 23명의 아동을 대상으로 구강 검진 2회, 구치부 교익 방사선 필름 판독 2회 그리고 전치부 및 구치부 DIFOTI^(TM) 이미지 판독 2회를 실시하고 각 방법에 대한 신뢰도 평가를 시행한 결과 다음과 같은 결론을 얻었다. 1. 구강 검진시 검사자간 신뢰도는 교합면에서 평균 0.8470으로 가장 높았으며, 근심면 평균 0.6430 원심면 평균 0.5727, 설면 평균 0.2807 그리고 협면 평균 0.2339 순으로 나타났다. 구치부에 국한시킨 경우 교합면에서는 평균 0.8577이었으며, 원심면 평균 0.8211, 설면 평균 0.7728, 협면 평균 0.7152, 근심면 평균 0.6782 순으로 나타났다. 2. 구치부 교익 방사선 사진 판독 결과에 대한 검사자간 신뢰도는 교합면 평균 0.8346, 근심면 평균 0.8675, 원심면 평균 0.8482 순으로 나타났다. 3. DIFOTI^(TM) 이미지 판독 결과에 대한 검사자간 신뢰도는 교합면 평균 0.8437, 협면 평균 8379, 근심면 평균 0.8223, 설면 평균 0.7766, 원심면 평균 0.6781 순으로 나타났다. 4. 치아 우식증 진단율을 비교한 결과 교합면, 협면, 설면에서는 DIFOTI^(TM) 이미지 판독이 가장 우수한 것으로 나타났으며(p<0.05), 근심면과 원심면에서는 방사선 판독이 가장 우수한 것으로 나타났다(p<0.05). Over the past 20 years, great strides have been made in research regarding the mechanisms involved in the progression of carious lesions, but new equipment and research tools need to be developed to continue these advancements in caries research. Various methods have been applied to reduce the incidence of carious lesions, which have led to a significant decrease in the number of occlusal caries, but a concurrent increase in the proportion of proximal carious lesions. New diagnostic equipment has been developed to detect early stage carious lesions, and these have demonstrated excellent laboratory results and show promise in clinical applications. The research presented here examines the efficacy of the newly developed DIFOTI^(TM) system in detecting proximal carious lesions compared to traditional intraoral exam and bitewing radiography, possible problems or deficiencies of using the system in clinic, possible improvements that can be made to the system, and the efficacy of detecting early, reversible carious lesions that can be remineralized by preventative fluoride applications. The subject pool consisted of 23 grammer school age patients just prior to entering the mixed dentition phase. Each patient was given a thorough oral examination, radiographic examination consisting of bitewing radiographs of the posterior teeth, and DIFOTIR examination of the anterior and posterior teeth. Each examination was carried out two times by two examiners, and the data were statistically analyzed. The results are as follows: 1. The mean alpha value of reliability test of the visual oral examination was as follows: occlusal surface was 0.8470, mesial surface was 0.6430, distal surface was 0.5727, lingual surface was 0.2807 and distal surface was 0.2339. When the examination was limited to posterior teeth, the mean alpha value was as follows: occlusal surface was 0.8577, distal surface was 0.8211, lingual surface was 0.7728, buccal surface was 0.7152 and mesial surface was 0.6782. 2. The alpha value of reliability test of the radiographic analysis of carious lesions of the occlusal, mesial, and distal surfaces was 0.8500. 3. The alpha value of reliability test of the DIFOTI^(TM) diagnostic analysis of carious lesions of the occlusal, buccal, lingual, mesial, and distal surfaces was determined to be 0.7917. 4. The DIFOTI^(TM) diagnostic system was found to be the most accurate means of detecting occlusal, buccal, and lingual surface carious lesions (p<0.05), while mesial and distal proximal carious lesions were most accurately assessed using bitewing radiography (p<0.05).

Ketamine Anesthesia for Maintenance of Spontaneous Breathing during Video-Assisted Thoracic Surgery

Jong Hoon Yeom,Seong Ho Park 순천향대학교 순천향의학연구소 2020 Journal of Soonchunhyang Medical Science Vol.26 No.1

If you have conventional general anesthesia using muscle relaxants for video-assisted thoracic surgery, one lung ventilation with double lumen tube could be dangerous when residual lung volume of non-operated lung could be lacking, and positive pressure ventilation for maintenance of proper minute ventilation could be impossible when there could be too much air leakage. Also, if the abnormal bleeding tendency is, thoracic epidural anesthesia for maintenance of spontaneous breathing could be difficult to perform. A 66-year-old male with a consolidative lesion in involving right middle and lower lobe, and left pneumothorax and pleu- ral effusion successfully underwent video-assisted thoracic bullectomy using ketamine with remifentanil for maintenance of spon- taneous breathing and intermittent positive pressure support ventilation within 10 cmH2O for protection of excessive air leakage.

Klebsiella Pneumoniae에 의한 자발적, 폭발적 가스괴저 : 좌 대퇴정맥, 좌 바깥 엉덩정맥, 온 엉덩정맥과 하대정맥 내에 인식되지 않은 가스기포 An Unrecognized Small Air Bubbles in the Left Femoral, External and Common Iliac Vein, and Inferior Vena Cava

염종훈 ( Jong Hoon Yeom ),손성일 ( Sung Il Son ),민형기 ( Hyoung Ki Min ),심재항 ( Jae Hang Shim ),조상윤 ( Sang Yoon Cho ),신우종 ( Woo Jong Shin ),김경헌 ( Kyoung Hun Kim ),전우재 ( Woo Jae Jeon ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.54 No.1

일측 폐환기 시 용적조절환기와 압력조절환기의 비교

염종훈 ( Jong Hoon Yeom ),신우종 ( Woo Jong Shin ),김유정 ( Yu Jung Kim ),심재항 ( Jae Hang Shim ),전우재 ( Woo Jae Jeon ),조상윤 ( Sang Yun Cho ),김경헌 ( Kyoung Hun Kim ) 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.56 No.5

Background: We hypothesized that pressure control ventilation allows a more even distribution in the lung and better maintenance of the mean airway pressure than is achieved with volume control ventilation. We try to compare the effect of pressure control ventilation (PC) with that of volume control ventilation without an end-inspiratory pause (VC) during one-lung ventilation (OLV) in an anesthetized, paralyzed patient for performing thoracopic bullectomy of the lung. Methods: We ventilated 20 patients with VC and PC after the insertion of a thoracoscope in continual order for, at least for 15 minutes, for each, VC and PC procedure. At the end of VC and PC, the respiratory mechanics, gasometrics, and hemodynamic parameters were measured and collected. Results: We found no significant differences between VC and PC except for the peak inspiratory airway pressure (PIP), the mean airway pressure and the arterial oxygen partial pressure (PaO2). The PIP was significantly decreased from 27.0±6.0 cmH2O (VC) to 21.8±5.4 cmH2O (PC). The mean airway pressure was significantly increased from 8.6±1.6 cmH2O (VC) to 9.4±2.0 cmH2O (PC), and the PaO2 was significantly increased from 252.9±97.3 mmHg (VC) to 285.2±103.8 mmHg (PC). Conclusions: If PC allows mechanical ventilation with the same tidal volume and respiratory rate as VC during OLV, then PC significantly increases the PaO2 but this is not clinically significant, and the PC significantly decreases the PIP, which induces barotrauma or volutrauma when the PIP is excessively high. (Korean J Anesthesiol 2009;56:492~6)

근 이완제 사용 없이 후두마스크 삽입 시 적절한 Propofol의 목표혈중농도

염종훈 ( Jong Hoon Yeom ),조상윤 ( Sang Yoon Cho ) 대한마취과학회 2003 Korean Journal of Anesthesiology Vol.44 No.1

Hyperosmotic polydixylitol for crossing the blood brain barrier and efficient nucleic acid delivery

Garg, P.,Pandey, S.,Seonwoo, Hoon,Yeom, Seungmin,Choung, Yun-Hoon,Cho, Chong-Su,Choung, Pill-Hoon,Hoon Chung, Jong The Royal Society of Chemistry 2015 Chemical communications Vol.51 No.17

<P>Here, we introduce a polydixylitol based highly osmotic polymer that not only transmigrates the BBB by intra-arterial infusion of osmotic polyol but also triggers cellular uptake <I>via</I> modulation of caveolae mediated endocytosis.</P> <P>Graphic Abstract</P><P>We report that the incorporation of a hyperosmotic molecule, dixylitol, into the backbone of a delivery vector can enhance its blood brain barrier transmigration. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc09871d'> </P>

Transforming a surface state of a topological insulator by a Bi capping layer

Yeom, Han Woong,Kim, Sung Hwan,Shin, Woo Jong,Jin, Kyung-Hwan,Park, Joonbum,Kim, Tae-Hwan,Kim, Jun Sung,Ishikawa, Hirotaka,Sakamoto, Kazuyuki,Jhi, Seung-Hoon American Physical Society 2014 Physical review. B, Condensed matter and materials Vol.90 No.23

Fast and robust algorithm of tracking multiple moving objects for intelligent video surveillance systems

Jong Sun Kim,Dong Hae Yeom,Young Hoon Joo IEEE 2011 IEEE transactions on consumer electronics Vol.57 No.3

<P>This paper deals with an intelligent image processing method for the video surveillance systems. We propose a technology detecting and tracking multiple moving objects, which can be applied to consumer electronics such as home and business surveillance systems consisting of an internet protocol (IP) camera and a network video recorder (NVR). A real-time surveillance system needs to detect moving objects robustly against noises and environment. So the proposed method uses the red-green-blue (RGB) color background modeling with a sensitivity parameter to extract moving regions, the morphology to eliminate noises, and the blob-labeling to group moving objects. To track moving objects fast, the proposed method predicts the velocity and the direction of the groups formed by moving objects. Finally, the experiments show that the proposed method has the robustness against the environmental influences and the speed, which are suitable for the real- time surveillance system.</P>

산모의 경막외마취시 Midazolam의 정맥 투여-임상 연구

염종훈,신우종 한양대학교 의과대학 1996 한양의대 학술지 Vol.16 No.2

Background: This study was investigated for assessing of the sedative dose of midazolam and its influence on neonatal Apgar score that intravenously injected immediately before operation during epidural anesthesia for cesarean section. Methods: Midazolam, 1mg, was given into a freely running IV line every 30s 2min after 2 mg of midazolam was initiately injected. Ten seconds prior to each injection patients were asked to open the eye. No response, as determined by the anesthesiologists, to three promptly repeated and increasingly louder commands was considered the end-point for the study and no further midazolam was given. Results: The sedative dose of midazolam in our study was 3.3±1.1 mg and interindividual variation (range:2-7mg) were wide. Respiratory depression was occurred in one of pregnant women with midazolam. All of the Apgar scores of the newborn infants at 1 and 5 min in both groups were higher than seven. Conclusions: When the intravenous injection of midazolam for sedation immediately before operation is required in pregnant women during epidural anesthesia for cesarean section,we would like to suggest that one should initiately administer the small dose and then inject the incremental dose with careful observation of the respiratory status.