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백영희,남태철 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1
Generally, The Magnetic field sensor which is made of silicon has not good sensitivity. so we make a potential barrier along the edges of the emitter , which prevents a useless current that flows parallel to the chip surface and limits the current that is used for sensing magnetic field to the chip surface perpendicularly. The Magnetic field sensor used for this experiment is a magnetotransistor that is fabricated by standard CMOS technology. we measure the variation of the sensitivity according to the variation of the magnetic field and under the uniform magnetic field, measure the variation of the sensitivity according to the variation of the base current and the variation of the voltage that is applied substrate, measure the variation the of the sensitivity according to the variation of the reverse voltage applied the P^(+) stripe with respect to the emitter, we also measure the dependence of the temperature.
Epinephrine 국소 침윤에 의한 급성 폐부종 : 증례보고
백영희,옥시영,김순임,김선종 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1
Epinephrine overdose is not an uncommon event and is reported in the literature to be caused by inadvertent injection, injection of an incorrect concentration, or rapid absorption via mucosal surfaces and incisional wounds. Alpha-adrenergic stimulation by epinephrine increases peripheral vascular resistance, which in turn increases the left ventricular filling pressure. This process shifts blood volume from the peripheral circulation into the pulmonary vasculature, which is less sensitive to the vasoconstrictive effects of epihephrine. We describe a 15-year-old patient who developed tachycardia and acute pulmonary edema due to inadvertent overdose epinephrine infiltration for hemostasis during myringoplasty. The patient recovered without any sequelae after intensive treatment involving endotracheal suction, fluid restriction, diuretics, dopamine infusion and ventilatory care.