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      • 일측 이성대상포진 후 발생한 양측성 전정기능저하

        정성원,정재윤,이정구,서명환 대한평형의학회 2008 Research in Vestibular Science Vol.7 No.2

        Herpes zoster oticus usually accompanies vestibulopathy on the ipsilateral ear. However we have encountered two herpes zoster oticus patients with bilateral vestibulopathies. Bilateral vestibulopathy was detected on the 2nd month and 19th day of herpes zoster oticus, respectively. While the contralateral vestibulopathy was detected 2 month after the ipsilateral vestibulopathy in the first patient, the vestibular function deteriorated simultaneously on the 19th day in the second patient. It seems that the bilateral vestibulopathy was caused by an autoimmune process in both cases, but the initiating event is different. The ipsilateral vestibular damage may have sensitized the immune system in the first patient resulting in sympathetic vestibulopathy. But in the second patient, the ipsilateral cochlear damage may have sensitized the immune system resulting in simultaneous bilateral vestibulopathy. Herpes zoster oticus usually accompanies vestibulopathy on the ipsilateral ear. However we have encountered two herpes zoster oticus patients with bilateral vestibulopathies. Bilateral vestibulopathy was detected on the 2nd month and 19th day of herpes zoster oticus, respectively. While the contralateral vestibulopathy was detected 2 month after the ipsilateral vestibulopathy in the first patient, the vestibular function deteriorated simultaneously on the 19th day in the second patient. It seems that the bilateral vestibulopathy was caused by an autoimmune process in both cases, but the initiating event is different. The ipsilateral vestibular damage may have sensitized the immune system in the first patient resulting in sympathetic vestibulopathy. But in the second patient, the ipsilateral cochlear damage may have sensitized the immune system resulting in simultaneous bilateral vestibulopathy.

      • KCI등재

        A Case Report with Lymphangiomatosis of the Colon

        정성원,차재명,이정일,주광로,최재원,신현필,김교영 대한의학회 2010 Journal of Korean medical science Vol.25 No.1

        The incidence of lymphangiomas in the gastrointestinal tract is low, particularly in the colon and rectum, and most cases are solitary. Lymphangiomatosis of the colon are encountered infrequently with only one report in the English literature, and polypectomy was performed for the diagnosis in that case report. However, trends in the diagnosis of lymphangiomatosis of colon have been changing since the development of endoscopic ultrasonography (EUS), and this case is the first in that lymphangiomatosis of the colon was diagnosed without invasive procedures. Here we describe the case of 31-yr-old woman with lymphangiomatosis of the colon with numerous polyposis-like appearing lesions diagnosed by endoscopic ultrasonography and a colonoscopy.

      • KCI등재

        가시광 감응형 광촉매에 의한 수경재배용 배양액의 재이용 살균시스템 개발(I) - 광촉매 필터 요인시험 -

        정성원,하유신,이종원,박종민,권순홍,이기명 한국농업기계학회 2010 바이오시스템공학 Vol.35 No.6

        We produced a basic system of sterilization of nutrient solution based on the characteristics of coated filter with the visible light-reactive titanium oxide photocatalyst according to the findings of the first stage. We developed a model system with a proper number and arrangement of filter elements, the visible light-reactive titanium oxide photocatalyst according to findings from the basic performance test. Main results of this study were as followers;The ceramic filters showed the best performance of sterilization of nutrient solution. The visible light-reactive titanium oxide photocatalyst sterilized more effectively the nutrient solution under the sunlight than UV light. The sterilization performance by passing repeatedly through a few filter was more efficient than that by treating simultaneously with a large number of filters. The filter with 15ppi in pore size, 20 mm in thickness, and 3 layers in titanium oxide coating was desirable in the intensity and sterilization performance.

      • KCI등재
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      • KCI등재

        전력품질을 고려한 수용가 모선 가격 계산

        정성원,박인덕,김재현,이근준,Jeong, Sung-Won,Park, In-Duck,Gim, Jae-Hyeon,Lee, Geun-Joon 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.3

        본 논문은 수용가에 대한 전력요금이 각 모선별로 부과될 경우 모선들의 전력품질을 측정하여 이를 비용화할 수 있다고 가정하였다. 이를 계통계획에 반영하여 예상되는 비용은 샘플계통을 통하여 다음과 같은 계산 방법을 제안하였다. 먼저 모선가격을 계산하기 위해서는 계통에서 전력설비의 운전조건은 최적조류계산에 의해 최적화되어 있는 상황으로 가정하여 모선가격[$/MVAH]을 산정하고, 계통의 각 모선에 연결된 부하들의 연중 발생하는 고장에 의해 탈락되는 피해비용을 산출하였다. 결과적으로 제안된 방법은 전력품질을 포함한 모선 총합 비용을 계산시 매우 효과적이였다. This paper measures power quality of bus in case electric charges about customer are imposed by each bus, supposed that can calculate this cost. When reflected this in system planning, expected cost proposed following method through sample system. To calculate nodal cost operating condition of power equipment calculates nodal cost[$/MVAH] supposing by situation that is optimized by OPF(optimal power flow) in system. The damage cost that is shed by fault that happen during year of loads in system that is linked on each bus was produced. As a result, proposed method was very effective in case of calculating bus total cost including power quality cost.

      • KCI등재

        전두동 거대 골종의 내시경하 Modified Lothrop 접근법을 이용한 제거

        정성원,정영준 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.10

        Osteomas in the paranasal sinus had been usually treated with external surgical approaches. These techniques are effective in certain conditions such as large size or bilateral involvement of osteomas, with intracranial or orbital complications. This modality, however, have some disadvantages like permanent scar formation, bleeding, mucocele, and paresthesias. The authors recently experienced a huge impacted frontal osteoma, which completely involved the bilateral frontal recess without enough working space to mobilize the tumor. The huge bilateral impacted frontal osteoma was removed with endoscopic modified Lothrop approach due to cosmetic problems. We hereby report this case with a review of literature. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:661-4

      • KCI등재후보

        상부위장관내시경 검사의 합병증으로 발생한 일측성 성대마비 2예

        정성원 대한소화기내시경학회 2006 Clinical Endoscopy Vol.33 No.1

        Upper Gastrointestinal endoscopy is extensively used these days and its various complications, including cardiopulmonary disease, bleeding, perforation and infection, have been reported on, but vocal cord paralysis as a complication of endoscopy has not been reported on. The pressure on the larynx by the endoscopic tip itself or the gag reflex during endoscopy could cause vocal cord paralysis as the endoscopic tip passes through the pyriform sinus, which is close to the recurrent laryngeal nerve and arytenoid cartilage. We experienced two cases of vocal cord paralysis as complications of upper Gastrointestinal endoscopy and we report on them here. (Korean J Gastrointest Endosc 2006;33:32-36) 상부소화관내시경 검사는 광범위하게 시행되고 있으며 심폐질환, 출혈, 천공 그리고 감염 등 다양한 합병증들이 보고되어 왔으나 성대마비에 대해서는 보고된 바 없다. 검사 시 내시경 선단은 이상와(pyriform sinus)를 통과하여 상부식도로 진입하게 된다. 이상와는 얇은 근육을 사이에 두고 반회후두신경(recurrent laryngeal nerve) 및 피열연골(arytenoid cartilage)과 접해 있는데 이들은 모두 성대마비의 주원인 기전으로 작용하는 구조물이다. 따라서 내시경 선단의 직접적인 압박이나, 선단이 이상와에 진입한 상태에서, 구역반사로 인해 후두에 대한 압박이 발생하면 반회후두신경의 마비나 피열연골의 부분탈구 등으로 성대마비가 야기될 수 있음을 유추할 수 있다. 저자는 상부위장관내시경 검사 직후 발성장애와 애성이 발생하여 후두경 등의 검사를 통해 일측성 성대마비를 진단하였던 2예를 경험하여 보고한다.

      • KCI등재

        Toward the Automatic Generation of the Entry Level CDA Documents

        정성원,김승희,유수영,최진욱 대한의료정보학회 2009 Healthcare Informatics Research Vol.15 No.1

        Objective: CDA (Clinical Document Architecture) is a markup standard for clinical document exchange. In order to increase the semantic interoperability of documents exchange, the clinical statements in the narrative blocks should be encoded with code values. Natural language processing (NLP) is required in order to transform the narrative blocks into the coded elements in the level 3 CDA documents. In this paper, we evaluate the accuracy of text mapping methods which are based on NLP. Methods: We analyzed about one thousand discharge summaries to know their characteristics and focused the syntactic patterns of the diagnostic sections in the discharge summaries. According to the patterns, different rules were applied for matching code values of Systematized Nomenclature of Medicine Clinical Terms (SNOMED CT). Results: The accuracy of matching was evaluated using five-hundred discharge summaries. The precision was as follows: 86.5% for diagnosis, 61.8% for chief complaint, 62.7%, for problem list, and 64.8% for discharge medication. Conclusion: The text processing method based on the pattern analysis of a clinical statement can be effectively used for generating CDA entries

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