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Clinical Study of Conservative Therapy of Deep Neck Infection (심경부 감염의 보존적 치료에 대한 임상적 고찰)

  • 김보형;임대준;강성호;류재면;조영찬;오대현;김요한
    • Korean Journal of Bronchoesophagology
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    • v.9 no.2
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    • pp.49-55
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    • 2003

  • Background and Objectives : Traditionally incision and drainage is considered to be standard treatment of deep neck infection. But antibiotics and diagnostic technique are developed recently, there are reports that conservative therapy could be as successful as open surgical drainage. The purposes of this study has been to assess clinical feature between surgical therapy group and conservative therapy group through statistical analysis. Materials and Methods : A retrospective study was performed on 46 cases of deep neck space abscess, which were confirmed CT, in patients admitted from January 1999 to June 2002. Result : About 80% of all are treated with conservative therapy. Erythrocyte sediment rate, volume of abscess and duration of hospitalization of conservative therapy group are decreased than those of surgical therapy group. Conclusions : Conservative therapy is expected to be effective on treatment of early stage, small sized deep neck infection. But its complication can lead to serious condition of patient it should be done under meticulous observation.

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Identification of the Most Conservative Condition for the Safety Analysis of a Nuclear Power Plant by Use of Random Sampling (무작위 추출 방법을 이용한 원자력발전소 보수적 안전해석 조건 결정)

  • Jeong, Hae-Yong
    • Journal of the Korean Society of Safety
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    • v.30 no.5
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    • pp.131-137
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    • 2015

  • For the evaluation of safety margin of a nuclear power plant using a conservative methodology, the influence of applied assumptions such as initial conditions and boundary conditions needs to be assessed deliberately. Usually, a combination of the most conservative initial conditions is determined, and the safety margin for the transient is evaluated through the analysis for this conservative conditions. In existing conservative methodologies, a most-conservative condition is searched through the analyses for the maximum, minimum, and nominal values of the major parameters. In the present study, we investigates a new approach which can be applied to choose a most-conservative initial condition effectively when a best-estimate computer code and a conservative evaluation methodology are utilized for the evaluation of safety margin of transients. By constituting the band of various initial conditions using the random sampling of input parameters, the sensitivity study for various parameters are performed systematically. A method of sampling the value of control or operation parameters for a certain range is adopted by use of MOSAIQUE program, which enables to minimize the efforts for achieving the steady-state for various different conditions. A representative control parameter is identified, which governs the reactor coolant flow rate, pressurizer pressure, pressurizer level, and steam generator level, respectively. It is shown that an appropriate distribution of input parameter is obtained by adjusting the range and distribution of the control parameter.

  • https://doi.org/10.14346/JKOSOS.2015.30.5.131 인용 PDF KSCI