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증례 : 내분비-대사 ; 갑상선전절제술을 받은 환자에서 급성 Levothyroxine 중독 1예
정윤 ( Yun Jung ),안희정 ( Hee Jung Ahn ),현진수 ( Jin Soo Hyun ),장회수 ( Hoe Soo Jang ),김진화 ( Jin Hwa Kim ),김상용 ( Sang Yong Kim ) 대한내과학회 2015 대한내과학회지 Vol.88 No.3
The use of levothyroxine is increasingly widespread. There are relatively few reports of acute massive levothyroxine intoxication leading to emergencies in adults, and such intoxication has a wide range of presentations. Although thyroid gland activity is suppressed by thyroid stimulating hormone as a result of overdose exposure to exogenous thyroid hormone, it is unclear what symptoms are to be expected in acute levothyroxine intoxication in the absence of the thyroid gland. We report a case of massive acute levothyroxine intoxication in a patient with total thyroidectomy, along with observed changes over time in thyroid hormone levels and symptoms. To the best of our knowledge, this report presents the first description of acute massive levothyroxine intoxication in the absence of a thyroid gland. (Korean J Med 2015;88:313-317)
박진수(Park, Jin-Soo),백지숙(Baek, Ji-Suk),양태현(Yang, Tae-Hyun),김창수(Kim, Chang-Soo),임성대(Yim, Sung-Dae),박구곤(Park, Gu-Gon) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
This study presents preparation and characterization of composite membranes based on ionic liquids. The ionic liquids act as water in sulfonated membranes. On the behalf of ionic conduction through ionic liquid inside the membranes, non-aqueous membranes showed Arrenhius dependence on temperature with no external humidification. It was implied that hopping mechanism of proton was dominant in the ionic liquid based membranes. In addition, small angle X-ray (SAXS) studies provided the information on morphology of ionic clusters formed by the interaction between sulfonic acid groups of the polymers and ionic liquids. The SAXS spectra showed matrix peaks, ionomer peaks and Prodo's law for Nafion based composite membranes and only matrix peaks for hydrocarbon based ones. However, ionic conductivity and atomic force microscopy (AFM) images showed the clear formation of ionic clusters of the hydrocarbon based composite membranes. It implies for ionic liquid based high temperature membranes that it is important to use sulfonated polymers as solid matrix of ionic liquid which can form clear ionic clusters in SAXS spectra.
박진수(Park, Jin-Soo),박석희(Park, Seok-Hee),양태현(Yang, Tae-Hyun),이원용(Lee, Won-Yong),김창수(Kim, Chang-Soo) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
Chloromethylated polysulfone(CMPSf) and a number of mono- and diamine compounds were used to prepare anion-exchange membranes(AEMs) and an ionomer binder solution. The properties of the AEMs were investigated such as OH^- conductivity, water content and dimension stability. Chloromethylation and amination of PSf were optimized in terms of the properties. Membrane-electrode assemblies were fabricated using anion-exchange membranes and the ionomer binder for solid alkaline fuel cells and direct borohydride fuel cells.
상완 신경총 손상에서 자연 회복과 신경 재건술간의 비교
백구현,정문상,서중배,박진수,박용범,전득수,Baek, Goo-Hyun,Chung, Moon-Sang,Seo, Joong-Bae,Park, Jin-Soo,Park, Yong-Bum,Jun, Deuk-Soo 대한미세수술학회 1996 Archives of reconstructive microsurgery Vol.5 No.1
서울대학교 의과대학 정형외과학 교실에서는 1985년 1월부터 1994년 12월까지 치험하였던 103명의 환자를 대상으로 최소한 8개월간 보존적 치료를 시행하며 자연 회복을 기다렸고, 수상 후 8개월에서 10개월까지 3개월마다 반복된 근전도 검사상 회복이 없거나 경미한 31명에 대하여 신경 복원술을 시행하여 다음과 같은 결과를 얻었다. 1) 자연 회복은 상완 신경총 손상 환자의 47명(46%)에서 일어났으며, 자연 회복된 환자의 3분의 2(31명)에서 근전도 검사상의 변화가 3개월에서 9개월 사이에 처음 발견되었고, 나머지 3분의 1(16명)의 환자에서 9개월에서 16개월 사이에 발견되어, 평균 7.8개월에 시작됨을 보여주었다. 수정된 AMA score상 내원 당시 14.8점에서 최종 추시 관찰시 39.8점으로 개선되었다. 2) 신경 복원술을 실시한 31명 중 52%가 기능적 호전을 보여주었고 수정된 AMA score상 술전 21.5점에서 술후 36.3점으로 14.8점이 개선되었다. 3) 양군에서 기능적 호전을 보인 비율은 유의한 수준이 아니지만, 기능적 호전의 정도는 25점과 14.8점으로 자연 회복군이 신경 복원술을 실시한 군보다 통계적으로 더 우수한 기능적 호전을 보임을 알 수 있었다(p<0.05). 4) 결국 저자들은 현재까지 손상의 부위와 정도를 정확하게 진단할 수 있는 방법이 부족한 상태에서 이론적으로 많은 문제점을 가지고, 기껏해야 근력 3 내지 4등급의 회복을 위해 환자에게 큰 부담을 주는, 결과가 확실하지도 않은 수술을 하는 것보다 복잡한 해부학적 구조 및 이에 따른 많은 변종을 가진 상완신경총 손상 환자에게 일단 회복이 되면 더 많은 기능 회복을 줄 수 있는 보존적 요법을 시행하며 자연 회복을 기다리는 것이 났다고 생각한다. 그러므로 저자들은 자연 회복이 수상 후 평균 7.8개월에 시작됨으로 자연 회복을 기대하며 1년간 기다려 본 후 1년이 경과하여도 자연회복이 되지 않는 경우에서 수술적 치료를 시행할 것을 제안한다. There has been no general agreement about optimal time for nerve surgery in the closed brachial plexus injury(BPI). From our early experiences, we knew by chance that spontaneous recovery in BPI patients may begin even later than 8 months after injury. Authors' strategy, which was based on our early experiences, for the treatment of closed fresh injury was 'wait and see' unlit 8 months after injury. From 1985 to 1994, we observed 103 patients with BPI. All of them did not have any operation until 8 months after injury. There were 95 men and 8 women with a mean age of 29 years. Motorcycle injury(31%) and vehicle accident(28%) were main causes of injury. Whole plexus types were observed in 56 patients(54%), upper plexus types in 29(28%), lower plexus types in 3(3%), and infraclavicular types in 15(15%). Electromyography was performed in all patients. This was repeated every three months to detect the recovery. Results were evaluated by authors' criteria, in which AMA system of brachial plexus impairment was modified. Duration of follow up was average 25 months. 47 patients(46%) showed spontaneous improvement, which was initially detected at average 7.8 months(range,3 months-16 months) after trauma by electromyography. The average score of these 47 patients improved from 14.8 points to 39.8 points.31 patients(30%) had nerve surgery such as nerve graft, neurotization or neurolysis. Average duration from injury to nerve surgery, was 10 months. Among 31 patients who had nerve surgery, 16 patients improved from preoperative 21.5 points to postoperative 36.3 points in average. Because spontaneous recovery began in average 7.8 months after injury, we think that it would be better to 'wait and see' for at least one year in patients with closed BPI expecting spontaneous recovery.
양태현(Yang, Tae-Hyun),이정우(Lee, Jung-Woo),박진수(Park, Jin-Soo),이원용(Lee, Won-Yong),김창수(Kim, Chang-Soo) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.1
The fuel cells for portable application are attracted using a liquid fuel such as methanol and chemical hydride solutions. Recently, DBFC [Direct Borohydride Fuel Cell] is a candidate for power of portable electronic devices. In this work, the anion exchange membrane and non-precious catalyst for the DBFC were concerned. Anion-exchange membrane was fabricated by amination of polysulfone followed chloromethylation. Non-precious catalysts such as raney-Ni and Ag were used as an anode and cathode catalyst. The optimum conditions of catalyst slurry mixing and MEA fabrication were developed. The single cell performance using anion exchange membrane and non-precious catalyst was evaluated and the results were compared with cation exchange membrane [Nafion membrane] and precious catalysts.
백지숙(Baek, Ji-Suk),박진수(Park, Jin-Soo),박승희(Park, Seung-Hee),양태현(Yang, Tae-Hyun),박구곤(Park, Gu-Gon),임성대(Yim, Sung-Dae),김창수(Kim, Chang-Soo),설용건(Shul, Young-Gun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The ionic liquid-based sulfonated hydrocarbon composite membranes was prepared for use in anhydrous high temperature-polymer electrolyte fuel cells (HT-PEFCs). Ionic liquid behaves like water in the composite membranes under anhydrous condition. However the composite membranes show a low conductivity and high gas permeability as the content of ionic liquid increases due to its high viscosity and content of ionic liquid, respectively. Hence, in order to enhance the proton conductivity and to reduce the gas permeability of the composite membranes with low content of ionic liquids, the acid containing a common ion of ionic liquid was added to the composite membranes. The characterization of composite membranes was carried out using small-angle X-ray scattering (SAXS), thermogravimetric analyzer (TGA) and impedance spectroscopy. As a result, the composite membranes containing acid showed higher proton conductivity than those with no acid under the un-humidified condition due to a decrease in viscosity. In addition, the proton conductivity of composite membranes increased with increasing mole concentration of acid.
Preparation of pore-filling membranes for polymer electrolyte fuel cells and their cell performances
최영우(Choi, Young-Woo),박진수(Park, Jin-Soo),이미순(Lee, Mi-Soon),박석희(Park, Seok-Hee),양태현(Yang, Tae-Hyun),김창수(Kim, Chang-Soo) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
Proton exchange membrane is the key material for proton exchange membrane fuel cells (PEMFC). Currently widely-used perfluorosulfonic acid membranes have some disadvantages, such as low thermal stability, easy swelling, excessive crossover of methanol and high price etc. Other membranes, including sulfonated polymer, radiation grafted membranes, organic-inorganic hybrids and acid-base blends, do not satisfy the criteria for PEMFC, which set a barrier to the development and commercialization of PEMFC. Pore-filling type proton exchange membrane is a new proton exchange membrane, which is formed by filling porous substrate with electrolytes. Compared with traditional perfluorosulfonic acid membranes, pore-filling type proton exchange membranes have many advantages, such as non- swelling, low methanol permeation, high proton conductivity, low cost and a wide range of materials to choose. In this research, preparation methodology of pore-filling membranes by particularly using all hydrocarbon polymers and fuel cell performances with the membranes are evaluated.
백지숙(Baek, Ji-Suk),박진수(Park, Jin-Soo),김경현(Kim, Kyung-Hyun),문기영(Moon, Gi-Young),김혜경(Kim, Hye-Kyung),최영우(Choi, Young-Woo),박구곤(Park, Go-Gun),양태현(Yang, Tae-Hyun),김창수(Kim, Chang-Soo),설용건(Shul, Young-Gun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The water-like ionic liquids have been widely used to enable the proton conduction in ionic liquid based membranes at high temperature and anhydrous PEFCs. In this study, we synthesized various kinds of composite membranes based on hydrocarbon polymers having good thermal and mechanical stabilities at high temperatures and ionic liquids. The composite membrane consisting of hydrocarbon polymer and ionic liquid was characterized by thermogravimetric analyzer (TGA) and impedance spectroscopy. Consequently the non-aqueous composite membranes of a variety of hydrocarbon polymer and ionic liquids have good conductivity and thermal stability at high temperature conditions.
류성관(Ryu, Sung-Kwan),박진수(Park, Jin-Soo),양태현(Yang, Tae-Hyun),박승희(Park, Seung-Hee),박석희(Park, S.H.),윤영기(Yoon, Y.G.),김한성(Kim, Han-Sung),김창수(Kim, Chang-Soo) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
In this study, we prepared electrodes containing ionic liquid for high temperature polymer electrolyte fuel cells. Effects of ILs on electrochemical properties of the electrodes were investigated carrying out measurement of cyclic voltammograms of the various electrodes with the content of IL in a strong supporting electrolyte. As the ILs content increased in electrodes, electrochemical surface area(ESA) decreased due to the leakage of ILs from Nafion ionomer. In addition, two case of cyclic voltammograms under two simulated environment, i.e. IL leakage from Nafion ionomer in I) electrode and ii) polymer electrolyte, were investigated. As a result, IL leakage from polymer electrolyte showed worse results in electrochemical properties of the electrode.