선천성 일측성 폐정맥 폐쇄증 1 예

김철호,이계영,심영수,김건열,한용철,한성구,정희순,임정기,박재형 대한내과학회 1988 대한내과학회지 Vol.35 No.3

Unilateral pulmonary vein atresia is a rare congenital disease and is frequently associated with intracardiac anomalies. It is usually diagnosed in childhood and is very rarely diagnosed in adulthood. A case of unilateral pulmonary vein atresia in a 20-year old female is de- scribed. The relevant findings were symptoms of exertional dyspnea, roentgenographic evidence of decreased lung volume, increased interstitial infiltration with septal lines in the involved side (right), and aoscence of blood flow in a radionuclide perfusion scan. Pulmonary angiography showed an extremely small right pulmonary artery and thining of the peripheral branches, and nonvisualization of the draining pulmonary veins. Bronchial arteriography showed rommunication between the bronchial artery and the right pulmonary artery and it was drained to the left pulmonary artery. Cardiac catheterization showed no intracardiac anomaly. The right bronchography was normal; pulmonary function studies showed a pure restrictive pattern and markedly in creased physiologic dead space. MRI showed no visible right pulmonary vein.

만성폐쇄성폐질환의 중증도와 폐고혈압 및 폐성심으로 진행과의 상관관계

김형호,박철진,이준,장광표,하성일,이재록,하재화,권세훈,권용운,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Background: From many previous studies, Pulmonary hypertension is the known independent predictive factor of the mortality in COPD. Also pulmonary hypertension is the major cardiovascular complication of COPD and is associated with the progression to cor pulmonale and poor prognosis. Author want to analyze the correlation between pulmonary hypertension and the severity of COPD which are classified by forced expiratory volume in one second, and the extent of progression to corpulmonale. Methods: Retrospectively we investigated the medical records of 118 patients with COPD who had pulmonary function test and echocardiogaphy more than one times during one-year follow-up (from June, 2005 to May, 2006) at respiratory division in chosun university hospital, and then 50 patients were enrolled in this study. We classified the severity from FEVl in pulmonary function test based on the GOLD guideline, also this was comparably analyzed with RVSP, RVIDd, Visual Grading from echocardiography. Results: 16 patients out of 50 were classified as moderate severity, 25 patients were severe, and 9 patients were very severe group. RVSP was higher in more severe groups than less severe groups but when it comes to pulmonary hypertension that RVSP is over 35 mmHg, there was no valid difference lies in those groups. As FEVl decreases RVSP and RVIDd increases, and observed relationship between RVSP which was classified as below 35 mm and above 35 mm groups and visual grading which was classified as normal and dilatated groups revealed valid correlation, Conclusion: As pulmonary function decreases, progression to pulmonary hypertension and cor pulmonale increases but there was no remarkable difference of prevalence in above moderate severity groups. 연구배경 폐고혈압은 이전의 많은 연구에서 만성폐쇄성폐질환에서 독립적인 사망의 예측인자로 알려져 있다. 또한 폐고혈압은 만성폐쇄성폐질환의 주요한 심혈관계 합병증이며, 폐성심으로의 진행 및 불량한 예후와도 관련되어 있다. 이에 저자는 폐고혈압과 1초간 노력성호기량으로 분류되는 만성폐쇄성폐질환의 중증도 및 폐성심으로의 진행 정도를 비교 분석하여 이들의 상관관계를 밝혀보고자 한다. 방법 2005년 6월부터 2006년 5월까지 1년 동안 본 병원 호흡기 내과에서 폐기능검사와 심장초음파 검사를 각각 1회 이상 시행한 적이 있는 118명에 한하여 의무기록을 후향적으로 조사하여 이 중에서 50명을 대상으로 하였다. 폐기능검사 시행 결과 얻은 1초간 노력성호기량을 바탕으로 GOLD guideline에 따라 중증도를 분류하였으며 이를 심초음파 시행 결과 얻은 우심실수축기압, 확장기말 우심실내부간격, 시각등급과 비교분석하였다. 결과 대상 환자 50명중 16명은 중등증, 25명은 중증, 9명은 최고중증 그룹으로 분류되었다. 우심실수축기압은 중증도가 높은 그룹에서 낮은 그룹에 비해 더 높게 나타났으나 폐고혈압에 해당하는 우심실수축기압이 35 mmHg이상인 환자에 있어사는 각 그룹간에 유의한 차이를 보이지 않았으며, 확장기말 우심실내부간격, 시각등급 또한 중증도와 유의한 차이를 보이지 안항ㅆ다. 1초간 노력성호기량이 감소함에 따라서는 우심실수축기압, 시각등급은 증가하였으며 우심실수축기압을 35mmHg 미만과 이상인 그룹으로, 시각등급을 정상과 확장이 있는 그룹으로 분류하여 비교한 결과에서는 유의한 상관관계를 나타냈다. 결론 폐기능이 감소할수록 페고혈압 및 폐성심으로의 진행이 증가하였으나 폐기능검사에서 중등도 이상의 그룹에서 유병률의 차이는 크지 않았다.

感冒辨證에서 희수식 맥진기를 이용한 肺脈觀察의 臨床的 意義

김준명,고재찬,배한호,박양춘,김병탁,김철중 대전대학교 한방병원 2001 惠和醫學 Vol.10 No.1

By useing hisusik-makjingi(희수식맥진기) we analysed lung-pulse of common cold patient. The result as fellow ; 1. In case of wind-cold common cold patient, It is short-avove pulse type and when cold transfer to fever it is dry-cold type pulse. 2. In a case of wind-heat, there is a pulse of above-frequent or frequent-stringed. And also we can find out that in a mild fever case there is not a frequent pulse meaning the heat. 3. In case of vutal energy shortage and yabggi deficiency, we can also notice that the pulse is so powerless. 4. The patient who have had an old complaint and a serious illness didn't show the accordance with the pulse and common cold type.

새로운 내장형 전류 감지 회로

곽철호,김정범 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

This paper proposes a new built-in current sensor(BICS) for current testing that has some advantages compared with conventional logic testing. The designed BICS detects the faults in circuit under test (CUT) and makes a Pass/Fail signal through comparison between CUT current and duplicated inverter current. The proposed circuit consists of a differential amplifier, a comparator and a inverter. It requires 10 MOSFETs and 3 inverters. Since the designed BICS does not require the extra clock, the added extra pin is only one output pin. The mode selection is not used in this method, so we can apply the circuit to on-line testing. The validity and effectiveness are verified through the HSPICE simulation of circuits with defects. When CUT is a 8×8 parallel multiplier, the area overhead of BICS is about 4.34%.

센서 어레이를 이용한 휘발성유기화합물 측정기기 개발

홍철호,김동진,이장훈,권혁구 한국환경독성학회 2004 환경독성보건학회지 Vol.19 No.1

Air quality monitoring is a primary activity for industrial and social environment. The government push for pollutants that must be monitored. Especially, the VOCs(Volatile Organic Compounds), which are very harmful for human and environment, should be controlled under the government policy. We have been developed a VOCs measurement system which recognize various kinds and quantities of VOCs, such as benzene, toluene, and xylene(BTX). Especially, we designed sensor array with various kinds of gas sensor and ANN(Artificial Neural Network) algorithm. The measured values for BTX have errors of 1~4ppm.

농업발전을 위한 농과대학의 역할에 관한 연구 : 새로운 농업산학협동체제 모색을 위하여

李鎬澈,孫泰華,金吉雄 慶北大學校 東洋文化硏究所 1981 東洋文化硏究 Vol.8 No.-

This study was attempted to propose necessity of the close school-industry cooperation for Korean agricultural and rural development, on assumption that the direct contact between farmers and agricultural college can contribute to better-off living of the small farmers. For this purpose, 197 farm house-holds in Kyeong Sang Buk Do were selected and interviewed. 52.8% of farmers was responsed in necessity of improvement of the present rural extension system. The problems indicated by farmers were mainly the socio-economic and technological factors such as dissemination of inappropriate agricultural technology, and lack of institutional coordination, public service, and extension of farm management. It was identified that the role and function of agricultural college was not directly related to rural development, and thus it was asked that extension system should be added in the present function of agricultural college. As implimenting method of rural extension by agricultural college, it was recommended that farmer's education (winter farmer training program), operation of model farm and dissemination of pamphlets containing informations on agricultural technology were mainly needed. Chi-Wen Chang's social laboratory concept is assumed the most efficient model of rural extension system for agricultural college in Korea.

PCA와 ANN을 이용한 VOC 측정기기 개발

이장훈,권혁구,박승호,김동진,홍철호 한국환경독성학회 2004 환경독성보건학회지 Vol.19 No.2

Air quality monitoring is a primary activity for industrial and social environment. The government identifies the pollutants that each industry must monitor. Especially, the VOCs(Volatile Organic Compounds), which are very harmful to human body and environment atmosphere, should be controlled under the government policy. However, the VOCs, which have not been confirmed in emission sources are very difficult to monitor. It is needed to develop the monitoring system that allow the continuous and in situ measurement of VOCs mixture in different environmental matrices. Gas chromatography and mass spectrometry are the most prevalent current techniques among those available for the analysis of VOCs. But, they need a large size analytical instrument, which costs a great deal for purchase and operation. In addition, it has some limitations for real time environmental monitoring such as location problems and slow processing time. Recently, several companies have commercialized a portable VOCs measurement systems, which cannot classify various kinds of VOCs but total quantities. We have developed a VOCs measurement system, which recognizes various kinds and quantities of VOCs, such as benzene, toluene, and xylene(BTX). Also, it can be used as a stand-alone type and/or fixed type in the vehicle with rack for real-time environmental monitoring.

Management and Prognostic Factors in Severe Traumatic Liver Injury

Ho Hyun Kim,Jung Chul Kim,Jae Kyoon Joo,Eun Kyu Park,Jin Shick Seoung,Chan Yong Park,Young Hoe Hur,Yang Seok Koh,Chol Kyoon Cho,Hyun Jong Kim 대한외과학회 2010 대한외과학회 학술대회 초록집 Vol.2010 No.11

전문 인명구조술팀에 의해 시행된 병원내 심폐소생술 결과의 In Hospital Utstein Style에 따른 분석

김호중,김영식,김선만,김상철,김주현,이부수 대한응급의학회 2002 대한응급의학회지 Vol.13 No.4

Purpose: This study assessed the results of the cardiopulmonary-cerebral resuscitation (CPCR) performed by advanced cardiovascular life support (ACLS) teams on cardiac-arrest patients in pundang - jeseang general hospital by using the in hospital Utstein style. Methods: From march 1999 to February 2001, we collected data based on a formatted protocol by using the in hospital utstein style. The subjects were adult patients over the age of 20 years who had not experienced trauma and who had been resusciated in the hospital (the emergency department (ED), the ward, and intensive care unit, etc.) by an ACLS team. We studied three groups: group Ⅰ (ED), group Ⅱ (general ward), and group Ⅲ (ICU). Results: among 100,552 patients who were admitted, we resuscitated 152 patients (23 in group Ⅰ, 83 group Ⅱ, 46 group Ⅲ). The number of male patient was higher than the number of female (78%/22%, 57%/43% & 53%/47%). For group Ⅰ, Ⅱ, and Ⅲ, respectively patients between 50 and 70 years of age were predominant, and in all groups, the most witness of the cardiac arrest was the nurse. Performed CPCR methods were complex (87%, 80% & 100%), compression only (4%, 0%, 0%), defibrillation only (9%, 17% & 0%) and ventilation only (0%, 3% & 0%). Initial EKG rhythms were VT/VF (9pts 39%, 44pts 53% & 22pts 48%), PEA (9pts 39%, 23pts 28% & 19pts41%) and asystol (5pts 22%, 16pts 19% & 5pts 11%). The average intervals (minutes) from arrest to CPCR were 0.4±0.4, 3.1±2.2, 1.0±0.6, from arrest to initial defibrillation were 2.7±1.3, 4.0±3.2, 3.0±1.1, from arrest to intubation were 0.5±0.4, 3.8±1.3 & 1.1±1.0 and from arrest to initial epinephrine were 1.4±0.7, 3.0±4.4, 1.5±1.1 The durations of resuscitation minutes were 23.1±22.1, 29.6±13.8, 19.4±14.6 The rates of return of spontaneous circulation were 70% (16/23), 55% (46/83), 77% (34/46). The number of discharged patinets were 3 (13%), 8 (9.6%), 9 (45%). The number of patients alive after 1year were 2 (8.7%), 2 (3.4%), 7 (15.2%). Conclusion: The rate of return of spontaneous circulation (ROSC) and the number of patinets after 1 year were higher when the resuscitation was performed quickly, and the ACLS team played a great role in this result. Thus, the resuscitation education and training of nurses are very important and should be pursued continuously.

Individual Charge Equalization Converter with Parallel Primary Winding of Transformer for Series Connected Lithium-Ion Battery Strings in an HEV

Chol-Ho Kim,Hong-Sun Park,Chong-Eun Kim,Gun-Woo Moon,Joong-Hui Lee 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3

In this paper, a charge equalization converter with parallel-connected primary windings of transformers is proposed. The proposed work effectively balances the voltage among Lithium-Ion battery cells despite each battery cell has low voltage gap compared with its state of charge (SOC). The principle of the proposed work is that the equalizing energy from all battery strings moves to the lowest voltage battery through the isolated dc/dc converter controlled by the corresponding solid state relay switch. For this research a prototype of four Lithium-Ion battery cells is optimally designed and implemented, and experimental results show that the proposed method has excellent cell balancing performance.