• 제목/요약/키워드: Fluid overload

검색결과 28건 처리시간 0.027초

조영제 사용으로 유발된 중증 저나트륨혈증 1례 (A Case of Severe Hyponatremia Induced by Radiographic Contrast Agent)

  • 홍정덕;임인석;최응상
    • Childhood Kidney Diseases
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    • 제14권1호
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    • pp.89-93
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    • 2010
  • 조영제 사용으로 유발된 중증 저나트륨혈증이 일어난 경우는 매우 드물다. 저자들은 조영제를 사용한 복부전산화단층촬영을 시행했던 환아에서 중증 저나트륨혈증과 경련이 발생하였으나, 신경학적 검사에서 특별한 이상이 발견되지 않았고, 조영제 이외의 저나트륨혈증의 다른 원인을 발견할 수 없었던 환자를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

자동 절단과 부하 감응 제어 기술을 적용한 양날 도로절단기 개발 (Development of a Double-blades Road Cutter with Automatic Cutting and Load Sensing Control Technology)

  • 서명국;강명철;박종호;김영진
    • 드라이브 ㆍ 컨트롤
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    • 제21권1호
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    • pp.53-58
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    • 2024
  • With the recent development of intelligence and automation technologies for construction machinery, the demand for safety and efficiency of road-cutting operations has continued to increase. In response to this, a double-blade road cutter has been developed that can automatically cut roads. However, a double-blade road cutter has a load difference between the two blades due to the ground and wear conditions of the cutting blades. The difference in load between the two blades distorts the direction of travel of the cutter. In this study, a vision sensor-based driving guide technology was developed to correct the driving path of road cutters. In addition, we developed a load-sensing technology that detects blade loads in real-time and controls driving speed in the event of overload.

복잡선천성 심장기형 완전교정수술후 시행한 복막투석의 임상적 고찰 (Peritoneal Dialysis after Correction of Complicated Congenital Heart Disease in Children)

  • 홍유선;박영환;조범구
    • Journal of Chest Surgery
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    • 제29권8호
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    • pp.844-849
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    • 1996
  • 본 연세대학교 심장혈관센타에서는 1992년 I월부터 1993년 12월가지 체외순환을 시행하여 완전교정 을 시행한 복잡심장기형 환아 198명중 22예에서 복막투석을 시행하였다. 이들의 나이는 10일에서 6세 (평균 14.8$\pm$ 17.8개월)이었으며 복막투석의 적응증으로는 수분과부하상태가 10예, 혈장칼릅치가 5. Smmo111 이상인 경우가 3예, 그리고 충분한 양의 이뇨제를 투여함에도 소변양이 Imllkglhr 이하가 시간 이상 지속된 경우 9예에서 시행하였다. 체외순환이 90분 이상인 경우와 그 이하인 경우를 비교할 때 90분 이상 시행한 경우에 의미있게 많이 복막투석을 필요로 하였다(P<0.05). 1개월 미만 환아 13예중 5예(38%)에서 시행하였으나 그 이상의 나이와 비교할 때 의미있게 높지는 않았다(p : 0.08). 16예에서 신기능이 회복되었으나 4명은 호흡부전 또는 폐혈증으로 사망하였고 신기능이 회독되지 않 은 6예는 저심박출증이나 폐부종 등으로 모두 사망하였다. 아직도 사망률은 높으나 체 외순환 후 빈뇨, 수분과부하, 또는 고칼륨증이 있을 때에는 조기에 복막투석을 시행하는 것이 환자 치료에 도움이 되리라 사료된다.

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일일 3교대 간호활동시 호르몬분비 및 신장기능의 변화에 관한 연구 -간호학생을 대상으로- (A Study on the Changes of Urinary Hormonal Excretion and Renal Function During Three-shift Nursing Practice)

  • 김명애
    • 대한간호학회지
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    • 제16권3호
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    • pp.78-96
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    • 1986
  • The sympathico-adrenergic system and the hypophyseal-adrenocortical system mediates the regulation of the internal milieu. And the kidneys regulate both water and electrolyte balance of the body fluid. The kidneys are the sites of production of renin which participate indirectly in maintaining renin. angiotensin-aldosterone system. These system de-serve special attention in the context of adjustment the effects on the body function. And so, maximal exercise and work load are associated with home-osthetic function. The nurses working in the hospital have been complained of fatigue and stress by frequent duty changes and overload. In order to define this, the possible changes of hormonal excretion during three-shift nursing practice were investigated. Urine samples were collected at pre-duty and post-duty, and were measured with chemical assay and radioimmunoassay in 30 nursing students, in nursing practice and 43 nursing students, in studying. The results obtained were as follows. 1. In nursing practice, urinary norepinephrine concentration showed a marked increase during day duty, urinary cortisol concentration showed a marked increase during evening duty, and urinary renin concentration was increased in night duty, 2. Corrected ratio of urinary sodium excreted by the urinary excretion of creatinin (UNa/UCr) and UCl/UCr showed a marked decrease during night duty. Nursing practice did not affect on the UK/UCr and urinary concentrating ability. From these results, it is suggested that further studies the define the effects on some physiological function of the three-shift nursing practice against circadian rhythm are needed for better working condition of nurses.

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지중 저압접속함의 침수조건에 따른 전위 분석 (Analysis of Transformer Fluid Aging from Overload Operation)

  • 정종만;이병성;최종기;정연하;박철배;송일근
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2006년도 춘계학술대회 논문집
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    • pp.284-287
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    • 2006
  • In this paper variety test results were discussed regarding to the ground potential increase. The tests conducted with a joint box simulating leakage point having an insulator fault. Inside the joint box three-phase cables and one neutral line were connected and the insulator at jointed part was peeled from the one of three-phase cables. The potentials around manhole cover were measured with the variation of manhole material, ground resistance and water resistance when the manhole was flooded. The potentials induced by an electric leakage were drastically decreased with increasing the distance from the leakage location and with less ground resistance.

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상용차량의 하중을 측정하기 위한 탑재형 자중계 개발 (Development of Onboard Scales to Measure the Weight of Trucks)

  • 서명국;신희영;이호연;고재일;투멘자르갈 엔크바타르
    • 드라이브 ㆍ 컨트롤
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    • 제18권1호
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    • pp.9-16
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    • 2021
  • Overloaded vehicles increase the maintenance cost of road structures, and they are a major factor in causing damage to the roads and bridges. In addition, overloaded vehicles compromise the braking capability of the vehicle; thus, threatening the safety of the driver. In order to prevent overloading of vehicles, the government is cracking down on the roads by using a device that measures the weight of vehicles. But this process is inconvenient because the place where the equipment is installed is far away from where the cargo is loaded. Due to the limitations of these fixed weighing devices, there is a growing need for technology that can monitor vehicle weight distribution and overload conditions in real time. In this work, we develop an onboard scale that can measure the load (weight) of trucks in real time. The onboard scale consists of high sensors, a signal processing unit, and a display, and it measures the load using height-displacement of the vehicle's leaf spring suspension.

상용차량의 정확한 하중 측정을 위한 겹판스프링의 이력특성 모델링 기법 개발 (Development of Modeling Method of Hysteretic Characteristics for Accurate Load Measurement of Trucks)

  • 서명국;바트바야르 엔크바트;신희영;이호연;고재일
    • 드라이브 ㆍ 컨트롤
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    • 제18권2호
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    • pp.38-45
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    • 2021
  • In recent years, the demand for an onboard scale system which can directly monitor load distribution and overload of vehicles has increased. Depending on the suspension type of the vehicle, the onboard scale system could use different types of sensors, such as, angle sensors, pressure sensors, load cells, etc. In the case of a vehicle equipped with leaf spring suspension system, the load of the vehicle is measured by using the deflection or displacement of the leaf spring. Leaf springs have hysteresis characteristics that vary in displacement depending on the load state. These characteristics cause load measurement errors when moving or removing cargoes. Therefore, this study aimed at developing an onboard scale device for cargo vehicles equipped with leaf springs. A sectional modeling method which can reduce measurement errors caused by hysteresis characteristics was also proposed.

비전센서를 활용한 양날 도로절단기의 절단경로 인식 기술 개발 (Development of Cutting Route Recognition Technology of a Double-Blade Road Cutter Using a Vision Sensor)

  • 서명국;권진욱;정황훈;주정함;김영진
    • 드라이브 ㆍ 컨트롤
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    • 제20권1호
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    • pp.8-15
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    • 2023
  • With the recent trend of intelligence and automation of construction work, a double-blade road cutter is being developed that automatically enables cutting along the cutting line marked on the road using a vision system. The road cutter can recognize the cutting line through the camera and correct the driving route in real-time, and it detects the load of the cutting blade in real-time to control the driving speed in case of overload to protect workers and cutting blades. In this study, a vision system mounted on a double-blade road cutter was developed. A cutting route recognition technology was developed to stably recognize cutting lines displayed on non-uniform road surfaces, and performance was verified in similar environments. In addition, a vision sensor protection module was developed to prevent foreign substances (dust, water, etc.) generated during cutting from being attached to the camera.

모형시험과 수치해석을 이용한 하중조건 변화에 따른 소형선박의 저항성능 변화에 관한 연구 (Study of Small Craft Resistance under Different Loading Conditions using Model Test and Numerical Simulations)

  • 임준택;마이클;임남균;서광철
    • 해양환경안전학회지
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    • 제29권6호
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    • pp.672-680
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    • 2023
  • 선박의 설계과정에 있어, 선박의 중량은 유체역학적 성능에 큰 영향을 미치는 가장 중요한 요소 중 하나이다. 선박은 일반적으로 최적의 흘수와 배수량을 갖는 하나의 조건으로 설계되지만, 실제로는 연료의 소비, 선박 평형수의 충전과 적재 조건과 같은 운항 활동으로 인해 선박의 중량 및 흘수가 일정 범위 내에서 바뀐다. 본 연구에서는 소형선박을 대상으로 3가지 하중조건에 따른 선박의 저항성능 변화를 모형실험과 수치해석을 통해 연구하였다. 마지막으로 2050년까지 CO2 배출 가스를 50% 감축한다는 국제해사기구(IMO) 목표를 따라 선박의 저항 성능을 개선하여 동력 요구 사항을 줄이기 위해 선박의 중량 변화에 따른 저항성능의 민감도를 연구하였다. 연구 결과, 선박의 중량변화에 따른 효과는 낮은 프루드 수에서 크게 나타나는 것으로 확인되며, 저항성능에 대한 연구 결과, 설계 흘수의 적재조건을 기준으로 배수량이 11.1% 증가하고, 흘수가 5% 증가한 Over load의 적재조건에서 운항 시 선체의 총 저항이 모형시험과 CFD 시뮬레이션에서 각각 15.97%, 14.31%까지 증가하는 것을 볼 수 있다.

이상지질혈증과 치료제 연구개발 경향 (Drug research and development tend to hyperlipidemia)

  • 설인찬
    • 혜화의학회지
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    • 제18권2호
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    • pp.1-12
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    • 2009
  • Most of the cholesterol is synthesized by liver in the body while about one of third is taken via dietary. The main functions of cholesterol is to protect membranes in cell surface, avoid the arterial bleeding by hypertension, and prolong the life of erythrocytes, and so on. However, overload of cholesterol leads to arteriosclerosis associated with leading death cause. Lack of physical activity, emotional and environmental stress, and low intake of protein or vitamin E induce the unbalance between HDL- and LDL-cholesterol so become a basis of ischemic disorders in heart, brain and elsewhere in the body. So far, four major classes of medications for hyperlipidemia are HMG-CoA reductase inhibitors (statins), bile acid sequestrants, nicotinic acid, and fibric acids. The statins can lower LDL and levels triglyceride, but may induce myopathy and an elevation of liver enzyme levels. The bile acid sequestrants lower LDL levels and raise HDL levels with no effect on triglyceride levels but side effects of gastrointestinal (GI) distress, constipation, and a decrease in the absorption of other drugs. Nicotinic acid and fibric acids lower LDL and triglyceride levels with showing flushing, hyperglycemia, hyperuricemia, GI distress, and hepatotoxicity dyspepsia, gallstones, myopathy, and unexplained noncardiac death as adverse effects. Above western drugs lower cholesterol by 15 to 30% while all have notable adverse effects. In traditional medicine, hyperlipidemia is regarded as retention of phlegm and fluid disease. Etiology and pathogenesis of hyperlipidemia is basically based on Spleen-Deficiency and Phlegm-Stagnation, accumulation and stasis of -heat, and Qi & blood stagnation induced by Phlegm-damp, water-dampness, and blood stasis. Thereby, strengthening Spleen and dissolving Phlegm, clearing away heat and diuresis, and supplementing Qi and activating blood circulation are commonly used therapeutic methods for hyperlipidemia. The traditional herbal medicine, have been used for patients with CVA, hypertension or hyperlipidemia in Oriental hospital or Oriental clinic. The lock and key theory is used to develop most of western medicine, however many diseases are caused by mixed factors in body-complex system. We expect that Oriental pharmacological theory could be newborn as a novel drug showing high advantage of blood levels of lipidsand QOL of performance without side effects.

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