고실유양돌기 제거술후 발생한 압박성 탈모증 5예

최연상(Yeon Sang Choi),백영곤(Young Gon Baik),유희준(Hee Joon Yu),손숙자(Sook Ja Son),김용재(Yong Jae Kim) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.2

Pressure alopecia can occur after prolonged pressure on the scalp with the head fixed in one position. We have repor ted 5 cases of pressure alopecia, occurring over the contralateral temporoparietal 1 area after tympanomastoidectomy due to chronic ot.itis media. Total times of operations were from 4 hours to 7 hours. Four of the 5 patients experienced scalp pain during the early postoperative period and one of them showed large bulla formation. Loss of hairs followed between the 14th and 36th postoperative day, and new hairs began to grow 2 or 3 months after the operation. (Kor J Dermatol 1994; 32(2): 352-357)

비전형적인 임상 양상을 보인 Trichophyton rubrum 감염증

최연상 ( Yeon Sang Choi ),이수근 ( Soo Keun Lee ),유희준 ( Hee Joon Yu ),손숙자 ( Sook Ja Son ) 대한피부과학회 1995 대한피부과학회지 Vol.33 No.3

Trichophyton rnbrum is a.nthropophilic, and the most common and widely distributed dermato phyte of man. Characterisic lions are circular, usually sharplyn ginated, slightly erythematous, dry, scaly patches with a raised edge. Progressive central clearin produces annular outlines. Other variants are reported, such as granulomatous, bullous or verucius. We reported a case of Trichophyton rubrum infection showing an unusual clinical manifest tin. The skin leison showed multiple discrete brownishouni macules with a fine scale on both hi lower legs, dorsum of feet and buttocks. Central clearing and inflammed border were not not. On KOH mount, fungal hyphae were noted and Techophyton rubrum was isolated on the funu culture. (Kor J Dermatol 1995;33(3): 585-589)

에너지 효용성을 고려한 무선 체온 센서 노드 개발 연구

최연상(Yeon-Sang Choi),변재영(Jae-Young Pyun) 한국정보기술학회 2013 Proceedings of KIIT Conference Vol.2013 No.5

최근 인구의 고령화와 출산율 감소로 인하여 병원의 환자는 포화상태에 이르고 있으며, 이는 곧 의료진들의 과도한 업무로 이어지고 향상된 의료 서비스 제공을 저하시키고 있다. 의료진들은 반복적으로 환자의 상태를 체크하기 위하여 일정한 주기 동안 반복적으로 환자의 체온을 측정하게 된다. 이는 곧 의료진들의 업무량 증가로 이어진다. 이를 해결하기 위하여 환자의 몸에 체온 측정 센서를 부착하여 측정하면 의료진들의 단순 반복적인 체온측정 방식에서 벗어나 측정된 체온 데이터 값을 모니터링 하여 적절한 의료 서비스를 제공함으로써 단순 업무량을 줄일 수 있을 것이다. 무선 체온 측정의 정확도 및 에너지 소모를 줄이기 위하여, 임계값(threshold)을 이용하여 중복 전송에 소모되는 에너지 소모를 줄이고, 체온 측정의 정확도를 높이기 위하여 관자놀이와 겨드랑이에 센서를 부착하여 측정하도록 하였다. 본 논문에서는 무선 (Wireless sensor network) 센서 노드가 갖는 요구사항과 이를 위한 구현 방법을 논하고자 한다. Recently, the decrease in mortality rate of the aging population is giving rise to the number of patients in the hospitals. The medical staffs are required to check the medical condition of the patients at the regular interval of time. However, as the numbers of patients are growing, the medical staffs are facing hard time to give quality of service with the limited staffs. There are certain medical examinations such decrease the work load of medical staffs. The body temperature of a patient can be measured through the temperature sensor, and the measured temperate can be reported to a sink device wirelessly. In this paper, we study how the temperature sensor can be used to accurately measure the temperature of the patient and how it can be transferred to the sink energy efficiently.

무선센서네트워크기반의 디지털 도어락을 이용한 홈오토메이션 시스템 개발

최연상(Yeon-Sang Choi),박용태(Yong-Tae Park),백운성(Woon Sung Baek),이동훈(Dong-hun Lee),변재영(Jae-Young Pyun) 한국정보기술학회 2011 Proceedings of KIIT Conference Vol.2011 No.5

최근 정보통신 기술의 발전에 따라 센서 네트워크 발전에 따라 우리의 생활공간에서 응용되는 빈도가 높아지고 있다. 또한, 유비쿼터스 기술이 발전하여 컴퓨팅 및 생활 기술이 발전하였다. 그에 따라 응용 서비스들이 제공되고 있다. 현재의 홈오토메이션 시스템은 기존의 건물에 적용하기 위해서는 설치 시간의 증가와 함께 사용자의 비용이 증가한다. 우리의 시스템은 도어락에 서버가 장착되며, 집 밖에서도 인터넷을 통해 집안 내부의 상황을 모니터링 할 수 있으며, 제어도 가능하다. 결과적으로 우리의 시스템이 설치시 발생하던 비용적인 문제와 시간적인 문제를 해결 하였다. Recently information and communication technology and sensor networks has been delveoped, Thus the frequency of application in our living space is increased. Ubiquitous computing and the technological advance develops better life quality. Application services are provided accordingly. To apply with existing buildings the home automation system, increase the installation time and the user’s cost. Our system is mounted on the server by door lock, When user is outside of home via the internet, it can be observed the situation inside of the house, and also can be controlled. As a result, our system solved the cost of installation and time problem.

CT검사 시 방사선 흡수선량에 따른 혈액학적 변화 관찰

최연상(Yeon Sang Choi),박환상(Hwan Sang Park),정창기(Chang Gi Jeong),이종호(Jong Ho Lee),최남길(Nam Gil Choi) 대한CT영상기술학회 2012 대한CT영상기술학회지 Vol.14 No.1

목적 환자의 CT검사 시 흡수선량에 따른 혈액수치를 검사 전과 검사 후로 나누어 흡수선량범위에 따른 급성장애에 관한 혈액학적 변화 관계를 알아보고자 한다. 대상과 방법 2011년 5월부터 7월까지 CT검사를 시행한 병동환자(남: 74명, 여: 53명-평균연령 60.9세)를 중심으로 검사 전 혈액검사 검사 후 1~2일 후 혈액검사결과를 수집하여 흡수선량 범위(500mGy 이하, 500~1000mGy, 1000 mGy 이상)를 구분, 환자의 급성장애에 관한 혈액수치를 비교 분석하였다. *사용장비: GE Light VCT (Dose Report: DLP <mGy-cm>) 결과 1. CT 검사 전과 검사 후(혈액검사 1~2일 후 이내) 혈액수치결과. 127명(남: 74명, 여: 53명) 평균나이: 60.9세 평균Dose: 846mGy-cm WBC(5.6→4.9) 10³/mm³ 12,5% 감소, RBC(4.8→4.5) 106/mm³ 6,3% 감소, Platelet(l76.9→165.6) 10³/mm³ 6.4% 감소, Lymphocyte(20.7%→19.2%) 7.2% 감소. 1) 500mGy-cm 이하:(남: 23명, 여: 13명) 평균나이: 60.2세, 평균Dose DLP 452 mGy-cm WBC(5.4→5.1) 10³/mm³ 5.6% 감소, RBC(5.1→4.9) 10⁶/mm³ 3.9% 감소 Platelet(185.1→178.3) 10³/mm3 3.7% 감소, Lymphocyte(18.2%→17.8%) 2.2% 감소. 2) 500mGy~1000mGy-cm: (남: 27명, 여: 15명) 평균나이: 60.5세 평균 DLP Dose: 867mGy-cm WBC(5.8→5.2) 10³/mm3 10.3% 감소, RBC(4.5→4.2) 10⁶/mm³ 6.7% 감소 Platelet(191.4→183.2) 10³/mm3 4.3% 감소, Lymphocyte(20.9%→19.4%) 7.2% 감소. 3) 1000mGy-cm 이상 -(남: 30명, 여: 19명) 평균나이: 61.2세 평균 DLP Dose: 1356 mGy-cm WBC(5.7→4.6)10³/mm³ 19.3% 감소, RBC(4.7→4.3) 10⁶/mm³ 8.5% 감소, Platelet(154.2→135.4) 10³/mm³ 12.2% 감소, Lymphocyte(23.1%→20.3%) 12.1% 감소. 결론 CT검사 전과 검사 후 흡수선량의 범위에 따른 혈액수치를 비교해 본 결과 검사 전에 비해 WBC, RBC, Platelet Count, Lymphocyte 수치 모두 검사 후에 혈액수치가 감소하였으며 흡수선량이 높은 구간에서 혈액수치의 감소폭이 비교적 높게 나타나는 걸 확인할 수 있었다. I. Purpose Absorbed dose during CT examinations of patients according to blood tests before and after the test is divided into levels. According to the absorbed dose range for acute disorders To evaluate the relationship between changes in hematology. II. MATERIALS and METHODS May to July 2011 who underwent CT scans ward patients (M: 94, F: 63 people - average age 60.9 years) before checking into the center of one to two days after a blood test after the test results of blood tests were collected. Absorbed dose range(less than 500mGy, 500~1000mGy, more than 1000mGy) separate the patients with acute disorders of On the blood levels were compared. *Equipment used: GE Light speed VCT (Dose Report: DLP <mGy-cm>) III. Result 1. CT scans before and after the test (blood test within 1-2 days)127 People (M: 74, F: 53), Average age: 60.9, Average DLP Dose: 846 mGy-cm WBC(5.6→4.9) 10³/mm³: 12.5% reduction, RBC(4.8→4.5) 106/mm³: : 6.3% reduction, Platelet(176.9→165.6) 10³/mm³: 6.4% reduction, Lymphocyte(20.7%→19.2%): 7.2% reduction. 1) Less than 500 mGy-cm People(M:23, F:13) Average age: 60.2, Average DLP Dose: 452 mGy-cm WBC (5.4→5.1) 10³/mm³: 5.6% reduction, RBC(5.1→4.9) 106/mm³: 3.% reduction Platelet(185.1→178.3) 10³/mm³: 3.7% reduction, Lymphocyte (18.2%→17.8%): 2.2% reduction 2) 500 mGy~1000 mGy-cm People(M:27, F:15), Average age:60.5, Average DLP Dose: 867 mGy-cm WBC(5.8→5.2) 10³/mm³: 10.3% reduction, RBC(4.5→4.2)106/mm³: 6.7% reduction Platelet(191.4→183.2) 10³/mm³: 4.3% reduction, Lymphocyte(20.9%→19.4%): 7.2% reduction 3) More than 1000mGy-cm People(M:30,F:19) Average age: 61.2, Average DLP Dose: 1356 mGy-cm WBC(5.7→4.6) 10³/mm³: 19.3% reduction, RBC(4.7→4.3) 106/mm³: 8.5% reduction, Platelet(154.2→135.4) 10³/mm³: 12.2% reduction, Lymphocyte (23.1%→20.3%): 12.1% reduction. IV. Conclusion CT scans before and after the test to the range of absorbed dose results in blood levels were compared. Before the test, compared to the WBC, RBC, Platelet Count, Lymphocyte numbers in blood levels after checking all the Decreased. In particular, the higher the absorbed dose to blood levels were more significantly reduced actin know.

일반 건강인에 대한 매독혈청검사 성적 ( 1987 - 1991 )

최연상(Yeon Sang Choi),유희준(Hee Joon Yu),손숙자(Sook Ja Son) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.5

Backgrouod : According to the areas and people that are examined, there are many differences in the prevalence of syphilis in Korea. However, the reactive rate of the serologi test for syphilis showed an increase in the 1960s, and it has deerea@sed from the beginning of the 1970s. Objective : Comparing the results of tke serologic test for syphilis which lotad been performed for the 5 years(1987-1991) on the physical examines and pregnant women who were considered as healthy, with the results with normal people, who were considered as healthy, which had been already reported, we tried to observe the change of reactive rate of serologic test for syphili. Methode : The serologic test for syphilis, including serum VDRL test and serum TPHA test, were carried out on 25,254 healthy adults(20,405 were physical examineea eamined at National Medical Center and 4,849 were pregnant women delivered at National Medical Cer ter). Results : The reaetive rate of serum VDRL test was 0.8% in 25,25 the althy adults(physical examinees 0.8%, pregnant women 0.7%). There were no stistically differerces between the annual incidences. 85.5% of VDRL-reactive subjects showed low VDRL titers(below 1:4) by the quantitative serum VDRL test, The biologic false positive reaction of serum VDRL test was 29(19.5%) in 149 VDRL-reactive subjects, using serum TPHA test as a standard. Conclusion : This study suggested thai, there was a decrease in the prevslence of syphilis in Korea. (Kor J Dermatol 1994;32(5):866-871)

양측성 대상 포진

이승연(Seung Yeon Lee),최연상(Yeon Sang Choi),유희준(Hee Joon Yu),손숙자(Sook Ja Son) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.6

Herpes zoster is characterized by several groups of vesicles situateu unilaterally within the distribution of the cranial or spinal nerve coming from one posterior ganglion Biateral involvement and recurrence are rare, and zoster involves two widely separated regions at on time are even rarer. We report a case of bilateral eupes zoster. A 5-years-old female patient was presented with painful bilateral grouped vesicles on an erythematous base along the dermatome of Lt T2 and Rt T5. Tzanck smear revealed multinucleated giant cells, and histopathologic findings were consistent with herpetic infection. She was successfully treated by administration of acyclovir without any significant cornplications. (Kor J Dermatol 1994;32(6): 1119-1122)

조갑 진균증에서 국소 Ciclopiroxolamine의 치료 효과

이승연 ( Seung Yeon Lee ),최연상 ( Yeon Sang Choi ),유희준 ( Hee Joon Yu ),손숙자 ( Sook Ja Son ) 대한피부과학회 1995 大韓皮膚科學會誌 Vol.33 No.3

Background : Ciclopiroxole.minsolution or cream is the topical in imycotic agent which has been known to have the ability to penetrate the horny skin and nail keratin. Objectives : The purpose of this study was to evaluate the pierapeutic effect of 1% ciclopiroxolamine solution on onychomycosis. Methods : 1% ciclopiroxolamie solution was applied topically to hentire surface of t,he diseased nail at least twice a day for 12 to 36 weeks according to the verity of nail involvement and degree of improvement in 21 cases of onychomycoses. Results : 1. With only topical application of 1% ciclopiroxolamine solutior, 4 out of 21 cases(67%) showed 25% or more reduction of the affected nail area, and 8 out of 21 cases(38%) showed 50% or more reduction of the affected nail area. 2. There was no significant difference in the degree of improvem of according to the duration of disease. 3. Therapeutic effect was relat.ively high on Candida albicans, while it was relatively low on Aspergillus species. 4. 3 out of 7 cases of mild(up to 30%) involvement showed a 7% or more reduction of the affected nail, while 4 out of 6 cases of severe(60-100%) involvement showed a 25% or less reduction of the affected nail. 5. As side effects during the topical application of 1% ciclopiroxol nr ne solution, periungualer ythema appeared in 3 cases, and a burning sensation in 4 of 21 cases. Conclusion : 1% ciclopiroir olaniine solution could be tried as an effctive therapeutic agent on onychomycosis for the patient who would not be tolerable to oral an ifiigal medication for associated systemic diseases or who does not want oral medication. (Kor J Dermatol 1995;33(3): 504-509)

유두상 한관선종과 병리조직학적 유사성을 보인 유두 유두상 선종

김희옥(Hee Ok Kim),최연상(Yeon Sang Choi),유희준(Hee Joon Yu),손숙자(Sook Ja Son),양정현(Jung Hyun Yang) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.6

A 24-year-old woman was seen for evaluation of an skin lesion on thiright nipple. Examination revealed a solitary 1.5 x 1cm-sized, erythematous, oozing, eroded andruted, verrucous nodule on the right nipple. A small amount of serous discharge was found but there was no pain or tenderness. Histopathologic findings showed cystic invaginations extending down vard from the epidermis and papillary projections extending into the lumina of the invagination. Pupiae were lined by two rows of cells. In stroma, there were marked inflammatory infiltrates containing any plasma cells. The overlying dermis showed an adenomatous growth pattern with a prolifertion of round, oval or irregular shaped ducts and fibrotic stroma. (Kor J Dermatol 1994; 32(6): 1123-1126)

서울 지방 백선증의 원인균 분포 ( 1985 - 1991 )

유희준(Hee Joon Yu),최연상(Yeon Sang Choi),백영곤(Young Gon Baik),손숙자(Sook Ja Son) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.1

Background : Dermatophytoses show marked differences in their incid.nces, distributions, and causative organisms by age, sex, occipations, environmental conditions and geographic dist.ributions. Objective : We evaluated the recent distributions of dermato