• 제목/요약/키워드: Suction well

검색결과 186건 처리시간 0.035초

중환자실 간호사의 기관내 흡인 임상지침 수행 현황 (Adherence to Clinical Guideline for Endotracheal Suction in ICU Nurses)

  • 양은정;신현숙
    • 동서간호학연구지
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    • 제23권1호
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    • pp.53-62
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    • 2017
  • Purpose: This study aimed to evaluate the adherence to the clinical guideline for endotracheal suction in nurses working at intensive care units (ICU) and to identify the characteristics of nurses with good adherence. Methods: This study was a descriptive study to evaluate the pattern of adherence and its related factors to endotracheal suction. One hundred fifty five nurses working at ICU participated in this study. We used a questionnaire developed based on American Association for Respiratory Care (AARC) guidelines and other associated factors from previous studies. Results: Around half of the participants reported that their adherence to the clinical guideline was poor. Items deviated from the recommended guideline were reasons for initiating a suctioning, applied suction pressure ranged from 20 to 200mmHg, and applied catheter size from 6 to 17 french. Other factors deviated were the depth of inserted catheter, and inappropriate use of normal saline instillation. The most significant factor was related to hospital; the misused or misled clinical protocol. Conclusions: The adherence to the clinical guidelines of the endotracheal suction in ICU nurses was not appropriate, which might contribute to the patient health outcomes. More enhanced continuing education as well as hospital regulation is warranted.

해상풍력발전설비를 위한 버켓기초의 기술동향 및 기술개발 방향 (Trend in suction bucket foundation for offshore wind turbine)

  • 윤희정;장인성;오명학;권오순;정성준
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2010년도 추계 학술발표회
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    • pp.494-503
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    • 2010
  • This paper reviews research trend in suction bucket foundation. Wind energy farm has been considered as an efficient alternative to fuel energy as world markets attempt to discover renewable resources. Recently, Korean government initiated the research projects investigating installation method of offshore wind energy foundation and design guideline as well as verifying feasibility of offshore wind farm. In fact, the installation of monopile and gravity type foundation has been sucessfully carried out in European and other advanced countries, and design guideline of those foundations are well established; however, various types of foundation would be necessary in the near future as offshore wind farm demands abundant wind resources in deep sea. In this paper, bucket foundation is spot lighted as a powerful and economic alternative applicable to deep sea condition.

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Effect of variable viscosity on combined forced and free convection boundary-layer flow over a horizontal plate with blowing or suction

  • Mahmoud, Mostafa A.A.
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제11권1호
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    • pp.57-70
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    • 2007
  • The effects of variable viscosity, blowing or suction on mixed convection flow of a viscous incompressible fluid past a semi-infinite horizontal flat plate aligned parallel to a uniform free stream in the presence of the wall temperature distribution inversely proportional to the square root of the distance from the leading edge have been investigated. The equations governing the flow are transformed into a system of coupled non-linear ordinary differential equations by using similarity variables. The similarity equations have been solved numerically. The effect of the viscosity temperature parameter, the buoyancy parameter and the blowing or suction parameter on the velocity and temperature profiles as well as on the skin-friction coefficient and the Nusselt number are discussed.

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EFFECT OF POROSITY ON THE TRANSIENT MHD GENERALIZED COUETTE FLOW WITH HEAT TRANSFER IN THE PRESENCE OF HEAT SOURCE AND UNIFORM SUCTION AND INJECTION

  • Attia, Hazem Ali;Ewis, Karem Mahmoud;Awad-Allah, Nabil Ahmed
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제16권2호
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    • pp.125-135
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    • 2012
  • The transient magnetohydrodynamic (MHD) generalized Couette flow with heat transfer through a porous medium of an electrically conducting, viscous, incompressible fluid bounded by two parallel insulating porous plates is studied in the presence of uniform suction and injection and a heat source considering the Hall effect. A uniform and constant pressure gradient is imposed in the axial direction and an externally applied uniform magnetic field as well as a uniform suction and injection are applied in the direction perpendicular to the plates. The two plates are kept at different but constant temperatures while the Joule and viscous dissipations are included in the energy equation. The effect of the Hall current, the porosity of the medium and the uniform suction and injection on both the velocity and temperature distributions is investigated.

Three-dimensional numerical analysis of nonlinear phenomena of the tensile resistance of suction caissons

  • Azam, Arefi;Pooria, Ahad;Mehdi, Bayat;Mohammad, Silani
    • Geomechanics and Engineering
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    • 제32권3호
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    • pp.255-270
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    • 2023
  • One of the main parameters that affect the design of suction caisson-supported offshore structures is uplift behavior. Pull-out of suction caissons is profoundly utilized as the offshore wind turbine foundations accompany by a tensile resistance that is a function of a complex interaction between the caisson dimensions, geometry, wall roughness, soil type, load history, pull-out rate, and many other parameters. In this paper, a parametric study using a 3-D finite element model (FEM) of a single offshore suction caisson (SOSC) surrounded by saturated soil is performed to examine the effect of some key factors on the tensile resistance of the suction bucket foundation. Among the aforementioned parameters, caisson geometry and uplift loading as well as the difference between the tensile resistance and suction pressure on the behavior of the soil-foundation system including tensile capacity are investigated. For this purpose, a full model including 3-D suction caisson, soil, and soil-structure interaction (SSI) is developed in Abaqus based on the u-p formulation accounting for soil displacement (u) and pore pressure, P.The dynamic responses of foundations are compared and validated with the known results from the literature. The paper has focused on the effect of geometry change of 3-D SOSC to present the soil-structure interaction and the tensile capacity. Different 3-D caisson models such as triangular, pentagonal, hexagonal, and octagonal are employed. It is observed that regardless of the caisson geometry, by increasing the uplift loading rate, the tensile resistance increases. More specifically, it is found that the resistance to pull-out of the cylinder is higher than the other geometries and this geometry is the optimum one for designing caissons.

극저비속도 원심펌프의 펌프성능 및 흡입성능 향상 (Improvement of Pump Performance and Suction Performance of a Very Low Specific Speed Centrifugal Pump)

  • 최영도;쿠로카와준이치
    • 한국유체기계학회 논문집
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    • 제9권3호
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    • pp.29-35
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    • 2006
  • There are high expectations of improving the performance of a centrifugal pump in the range of very low specific speed which has been developed recently for the use instead of a conventional positive displacement pump. However, even though elaborated studies has been done for the pump intensively, the pump performance has not increased so much. Also, it is difficult to find detailed information from published literatures for suction performance of the very low specific speed centrifugal pump. Therefore, this study is aimed to improve the pump performance more and to make clear suction performance of the very low specific speed centrifugal pump. Recircular flow stopper is installed on the pump casing wall at the region of impeller outlet to improve the pump performance and J-Groove is also installed at the inlet of the pump casing for the purpose of suppressing occurrence of cavitation as well as improving pump performance. The result suggests that the simultaneous improvement of pump performance and suction performance of the very low specific speed centrifugal pump is possible by adopting optimum configuration of the recirculation flow stopper and J-Groove.

CO2 트윈 로타리 압축기의 흡입관로에서의 가스맥동 해석 (Gas Pulsation Analysis in a T-Shaped Suction Passage of a CO2 Twin Rotary Compressor)

  • 김우영;안종민;김현진;조성욱
    • 설비공학논문집
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    • 제23권8호
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    • pp.549-555
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    • 2011
  • For a $CO_2$ one-stage twin rotary compressor, a T-shaped suction port was used to effectively supply the suction gas stream into two individual suction chambers of the twin cylinders. Suction gas pulsations were observed in the pressure sensor signals and these were simulated by using the acoustic modeling of Helmholz resonators in parallel. The module of acoustic modeling was combined to a computer simulation program for the compressor performance. Validation of the simulation program has been carried out for a bench model compressor in a compressor calorimeter. Cooling capacity and the compressor input power were reasonably well compared between the simulation and the calorimeter test. Particularly, good agreement on P-V diagram between the simulation and the test was obtained.

거머리 사용후 발생할수 있는 Aeromonas hydrophila 감염을 줄이기 위한 대책 (Measures to Reduce Aeromonas Hydrophila Infection that May Occur after Leech Apllication)

  • 윤효헌;정두성;최준
    • Archives of Reconstructive Microsurgery
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    • 제11권1호
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    • pp.73-77
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    • 2002
  • Medical application of leeches, by means of leech's blood suction, has advantages in not only directly removing blood congestion, but also preventing hindrance to venous drainage by inhibiting local thrombus formation and inducing continuous bleeding. Nevertheless, Aeromonas hydrophila infection secondary to such suction is most common and may develop into serious conditions from local inflammatory reaction to total necrosis of replanted parts and enterocolitis as well as sepsis. Once infected, it requires infection treatment, removal of necrotic tissues and reconstruction. Hence, duration and cost of treatment increase while functional recovery falls markedly. Accordingly, we present measures to reduce Aeromonas infections as follows: First, do not manipulate as much as possible while the leeches are sucking or moving. Second, the site which suction plates of the leeches are attached, should be selected away from the surgical wound site or open wound as much as possible. Third, contaminated or blood-wet gauze should be replaced often so that the skin of surgical areas would not swell. Furthermore, bleeding or oozing should be well-drained. Fourth, the areas other than the sites of leech attachment should be covered with sterilized gauzes in order to limit leech movement.

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3차원 수치해석을 이용한 점토지반에 설치된 석션파일 인발 시 발현되는 전단응력에 관한 연구 (A Study on the Side Shear Developed during Pullout of Suction Pile in Clays using 3D Numerical Analysis)

  • 이명재;윤희정
    • 한국지반환경공학회 논문집
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    • 제15권2호
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    • pp.59-66
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    • 2014
  • 본 논문에서는 석션파일의 인발거동을 조사하기 위해 유한차분법 상용 프로그램인 FLAC3D를 이용하여 수치해석을 수행하였다. 석션파일의 인발지지력을 전통적인 지지력 식을 이용하여 구하고, 이 값을 파일의 직경, 길이, 그리고 주변 점토의 비배수 전단강도를 변수로 하는 수치해석을 통한 해석 값과 비교하였다. 총 24개의 수치해석 결과를 바탕으로 석션파일의 인발파괴는 석션파일의 배수조건뿐만 아니라 파일의 제원과 주변 지반의 물성값에 의해 형태가 결정되는 것으로 밝혀졌다. 수치해석 결과로부터 석션파일 내부 주면에 발현되는 전단응력을 구하여 활동파괴와 인장파괴 중 어떤 파괴가 발생할 것인지를 결정하는데 사용하였다. 외부주면의 전단응력과 관계없이 높은 내부 전단응력을 얻은 경우 수치해석 내에서 활동파괴가 발생하는 경우가 많았으며, 이는 전통적인 지지력 공식으로부터 얻은 예측과 잘 맞았다.

MicroSUCI: A Microsurgical Background That Incorporates Suction Under Continuous Irrigation

  • Theodora Papavasiliou;Stelios Chatzimichail;Ankur Khajuria;Joon-Pio Hong
    • Archives of Plastic Surgery
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    • 제50권1호
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    • pp.96-100
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    • 2023
  • The microsurgical anastomosis is integral to the success of autologous-free tissue transfer. Successful performance of this procedure relies strongly on operator dexterity, which can be made more challenging when blood and edematous fluids obscure the field of view. Workflow is impeded by intermittent irrigation and suctioning, necessitating presence of an assistant, with risk of arterial thrombosis, from vessels being drawn into suction drains. To negate these current disadvantages and minimize the barrier of entry to microvascular operations, we designed, manufactured, and patented a novel three-dimensional printed microsurgical background device with microfluidic capabilities that allow continuous suction and irrigation as well as provide platforms that enable multiangle retraction to facilitate operator autonomy. This was validated in an ex vivo model, with the device found to be superior to the current standard. We believe that this will have major applicability to the improvement of microsurgeon