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Chong, Jong-Yun,Kim, Dong-Won,Jwa, Cheol-Su,Yi, Hyeong-Joong,Ko, Yong,Kim, Kwang-Myung The Korean Neurosurgical Society 2008 Journal of Korean neurosurgical society Vol.43 No.2
Objective: Delayed ischemic deficit or cerebral infarction is the leading cause of morbidity and mortality after aneurysmal subarachnoid hemorrhage (SAH). The purpose of this study is to reassess the prognostic impact of intraoperative elements, including factors related to surgery and anesthesia, on the development of cerebral infarction in patients with ruptured cerebral aneurysms. Methods: Variables related to surgery and anesthesia as well as predetermined factors were all evaluated via a retrospective study on 398 consecutive patients who underwent early microsurgery for ruptured cerebral aneurysms in the last 7 years. Patients were dichotomized as following; good clinical grade (Hunt-Hess grade I to III) and poor clinical grade (IV and V). The end-point events were cerebral infarctions and the clinical outcomes were measured at postoperative 6 months. Results: The occurrence of cerebral infarction was eminent when there was an intraoperative rupture, prolonged temporary clipping and retraction time, intraoperative hypotension, or decreased $O_2$ saturation, but there was no statistical significance between the two different clinical groups. Besides the Fisher Grade, multiple logistic regression analyses showed that temporary clipping time, hypotension, and low $O_2$ saturation had odds ratios of 1.574, 3.016, and 1.528, respectively. Cerebral infarction and outcome had a meaningful correlation (${\gamma}$=0.147, p=0.038). Conclusion: This study results indicate that early surgery for poor grade SAH patients carries a significant risk of ongoing ischemic complication due to the brain's vulnerability or accompanying cardio-pulmonary dysfunction. Thus, these patients should be approached very cautiously to overcome any anticipated intraoperative threat by concerted efforts with neuro-anesthesiologist in point to point manner.
Chong Hyun Suh,Seung Chai Jung,Byungjun Kim,Se Jin Cho,Dong-Cheol Woo,Woo Yong Oh,Jong Gu Lee,Kyung Won Kim 대한영상의학회 2020 Korean Journal of Radiology Vol.21 No.1
Appropriate use and analysis of neuroimaging techniques is an inevitable aspect of clinical trials for patients with acute ischemic stroke. Neuroimaging examinations were recently used to define the core eligibility criteria and outcomes in acute ischemic stroke research. Recent clinical trials for endovascular treatment in acute ischemic stroke have also demonstrated the efficacy or safety of endovascular treatment using various imaging modalities as well as clinical indices. Furthermore, independent imaging reviews and imaging core laboratory assessments are essential to manage and analyze imaging data in order to enhance the reliability of the outcomes. Therefore, we systematically reviewed the use of neuroimaging in recent randomized clinical trials for endovascular treatment of acute ischemic stroke in order to provide a thorough summary, which would serve as a resource guiding the use of appropriate imaging protocols and analyses in future clinical trials for acute ischemic stroke. This review will help researchers select appropriate imaging biomarkers among the various imaging protocols available and apply the selected type of imaging examination for each study in accordance with the academic purpose.
The Change of Fat Absorption After Disconnected Mesenteric Lymphatics in Dog
Won, Chong Man,Joo, Sang Yong CATHOLIC MEDICAL CENTER 1979 Bulletin of the Clinical Research Institute Vol.7 No.1
A number of clinical and experimental studies have reported segmental difference in the absorptive ability of the small intestine. The absorption of fat has received particular attention because steatorrhea was often observed following extensive small bowel resection.
THE APPROXIMATION OF THE SPECIAL CURVES BY β-SPLINE INTERPOLATION METHOD
Chong,Won-Yong 慶南大學校 附設 工業技術硏究所 1988 硏究論文集 Vol.6 No.-
로보트 아암 궤적 근사화에 스플라인 보간법이 사용된다. 아주 특수한 궤적, 즉 계단함수, ???, 고주파의 정현파, 임플스함수 등이 NEWNOT 알고리즘을 이용해서 스플라인 보간법에 의해서 훌륭히 근사화된다. In order to track the trajectories of the robot manipulators the spline interpolation and the approximation techniques can be used. The very special functions, that is, unit step function, ???, cos(ωπχ), and ??? are going to be approximated by spline interpolation considering the breakpoint configurations. It can be seen that from the results the fairly nicely approximated curves for the given functions can be accomplished.
Comparative proteomic analysis of human follicular dermal papilla cells and fibroblasts (초)
( Chong Hyun Won ),( Chae Hwa Kim ),( Oh Sang Kwon ),( Yong Jung Kang ),( Jeon Hae Chan ),( Hyeon Gyeong Yoo ),( Jin Ho Chung ),( Kyu Han Kim ),( Hee Chul Eun ),( Kun Cho ),( Jong Soon Choi ),( Won Se 대한피부과학회 2009 초록집 Vol.47 No.20
Risk Factors Related with Mortality in Patient with Pulmonary Tuberculosis
( Chong Whan Kim ),( Sang Ha Kim ),( Shun Nyung Lee ),( Seok Jeong Lee ),( Myoung Kyu Lee ),( Ji Ho Lee ),( Kye Chul Shin ),( Suk Joong Yong ),( Won Yeon Lee ) 대한결핵 및 호흡기학회 2012 Tuberculosis and Respiratory Diseases Vol.73 No.1
Background: The prevalence rate of pulmonary tuberculosis (PTB) is steadily decreasing in South Korea. However, PTB is a disease with relatively high mortality and morbidity rates throughout Korea. Although there are many studies and statistics about the risk factors of PTB mortality in many countries, there are only a limited number of domestic papers on this topic. The aim of this study is to determine predictive factors for mortality among in-hospital patients associated with PTB. Methods: From December 2006 to January 2011, we reviewed medical records of 2,122 adult patients diagnosed with tuberculosis at a single tertiary hospital in a suburban area. In this study period, 960 patients were diagnosed with PTB by positive Acid fast bacilli smear and/or mycobacterial culture of the respiratory specimen. We compared the groups of patients deceased and patients discharged alive with PTB. The number of dead patients was 82 (47 males, 35 females). Results: Mortality was significantly associated with increased values of white blood cells (WBC), blood urine nitrogen (BUN), creatinine, C-reactive protein (CRP), numbers of involved lung field, and length of hospitalization. Also, it was associated with the decreased values of hemoglobin, lymphocyte, sodium, albumin, and cholesterol. Furthermore, admission through the emergency department, initial intensive care unit admission, and drug resistant PTB affected mortality in PTB patients. Independent predictors associated with PTB mortality are BUN, initial intensive care unit care, and admission during treatment of tuberculosis. Conclusion: In our study, mortality of pulmonary tuberculosis was related with parameters associated with nutritional status, disease severity at the time of admission, and drug resistance.
( Chong Hyun Won ),( Oh Sang Kwon ),( Yong Jung Kang ),( Hyeon Gyeong Yoo ),( Dong Hun Lee ),( Jin Ho Chung ),( Kyu Han Kim ),( Won Seok Park ),( Nok Hyun Park ),( Kun Cho ),( Sang Oh Kwon ),( Jong So 생화학분자생물학회 2012 BMB Reports Vol.45 No.4
The dermal papilla cells (DPCs) of hair follicles are known to secrete paracrine factors for follicular cells. Shotgun proteomic analysis was performed to compare the expression profiles of the secretomes of human DPCs and dermal fibroblasts (DFs). In this study, the proteins secreted by DPCs and matched DFs were analyzed by 1DE/LTQ FTICR MS/MS, semi-quantitatively determined using emPAI mole percent values and then characterized using protein interaction network analysis. Among the 1,271 and 1,188 proteins identified in DFs and DPCs, respectively, 1,529 were further analyzed using the Ingenuity Pathway Analysis tool. We identified 28 DPC-specific extracellular matrix proteins including transporters (ECM1, A2M), enzymes (LOX, PON2), and peptidases (C3, C1R). The biochemically- validated DPC-specific proteins included thrombospondin 1 (THBS1), an insulin-like growth factor binding protein3 (IGFBP3), and, of particular interest, an integrin beta1 subunit (ITGB1) as a key network core protein. Using the shotgun proteomic technique and network analysis, we selected ITGB1, IGFBP3, and THBS1 as being possible hair-growth modulating protein biomarkers. [BMB reports 2012; 45(4): 253-258]
Enhanced Oral Bioavailability of Ibuprofen in Rats by Poloxamer Gel Using Poloxamer 188 and Menthol
Yong, Chul Soon,Lee, Mi-Kyung,Park, Young-Joon,Kong, Kyung-Hwan,Xuan, Jing Ji,Kim, Ji-Hyun,Kim, Jung-Ae,Lyoo, Won Seok,Han, Sung Soo,Rhee, Jong-Dal,Kim, Jong Oh,Yang, Chae Ha,Kim, Chong-Kook,Choi, Han Taylor Francis 2005 Drug development and industrial pharmacy Vol.31 No.7
<P>To improve the oral bioavailability of poorly water-soluble ibuprofen with poloxamer and menthol, the effects of menthol and poloxamer 188 on the aqueous solubility of ibuprofen were investigated. The dissolution and pharmacokinetic study of ibuprofen delivered by the ibuprofen-loaded preparations composed of poloxamer 188 and menthol were then performed. In the absence of poloxamer, the solubility of ibuprofen increased until the ratio of menthol to ibuprofen increased from 0:10 to 4:6 followed by an abrupt decrease in solubility above the ratio of 4:6, indicating that four parts menthol formed eutectic mixture with six parts ibuprofen. In the presence of poloxamer, the solutions with the same ratio of menthol to ibuprofen showed an abrupt increase in the solubility of ibuprofen. The poloxamer gel with menthol/ibuprofen ratio of 1:9 and higher than 15% poloxamer 188 showed the maximum solubility of ibuprofen, 1.2 mg/mL. The simultaneous addition of menthol and poloxamer 188 significantly improved the dissolution rates of ibuprofen from aqueous solution due to the ibuprofen solubility-improving effect of menthol in the presence of poloxamer. Furthermore, the ibuprofen-loaded preparation with menthol and poloxamer 188 gave significantly higher initial plasma concentrations, Cmax, and AUC of ibuprofen than did the preparation without menthol and poloxamer 188, indicating that the simultaneous addition of menthol and poloxamer 188 could improve the oral bioavailability of ibuprofen in rats. In modern pain management it is always desirable for the ibuprofen-loaded preparation with poloxamer 188 and menthol to show a rapid onset of action with a minimal phase of lag time to feel the decreased pain. From an industry point of view, it is more desirable for a formulation to be fast acting, easy to use, and cost effective. Thus, the ibuprofen-loaded preparation with poloxamer 188 and menthol was a more effective oral dosage form for poorly water-soluble ibuprofen.</P>