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Hemingson D, Shim A, Cross P, Choi H, Short T. Students’ perceptions of exercise science professor's intelligence, based on professor body type. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Choi H, Lau TK, Jiang FM, Chan MK, Zhang HY, Lo PSS, Chen F, Zhang L, Wang W. Fetal aneuploidy screening by maternal plasma DNA sequencing: 'false positive' due to confined placental mosaicism. Prenat Diagn 2012. [PMID: 23192749 DOI: 10.1002/pd.4024] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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228
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Hong SH, Park CS, Jung HS, Choi H, Lee SR, Lee J, Choi JH. A comparison of intra-operative blood loss and acid-base balance between vasopressor and inotrope strategy during living donor liver transplantation: a randomised, controlled study. Anaesthesia 2012; 67:1091-100. [PMID: 22950390 DOI: 10.1111/j.1365-2044.2012.07198.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Administration of vasopressors or inotropes during liver transplant surgery is almost universal, as this procedure is often accompanied by massive haemorrhage, acid-base imbalance, and cardiovascular instability. However, the actual agents that should be used and the choice between a vasopressor and an inotrope strategy are not clear from existing published evidence. In this prospective, randomised, controlled and single-blinded study, we compared the effects of a vasopressor strategy on intra-operative blood loss and acid-base status with those of an inotrope strategy during living donor liver transplantation. Seventy-six adult liver recipients with decompensated cirrhosis were randomly assigned to receive a continuous infusion of either phenylephrine at a dose of 0.3-0.4 μg.kg(-1).min(-1) or dopamine and/or dobutamine at 2-8 μg.kg(-1).min(-1) during surgery. Vascular resistance was higher over time in the phenylephrine group than in the dopamine/dobutamine group. Estimated blood loss was significantly lower in the phenylephrine group than in the dopamine/dobutamine group (mean (SD) 4.5 (1.8) l vs 6.1 (3.4) l, respectively, p=0.011). Patients in the phenylephrine group had lower lactate levels in the late pre-anhepatic and the early anhepatic phase and needed less bicarbonate administration than those in the dopamine/dobutamine group (median (IQR [range]) 40 (0-100 [0-160]) mEq vs 70 (40-163 [0-260]) mEq, respectively, p=0.018). Postoperative clinical outcomes and laboratory-measured hepatic and renal function did not differ between the groups. Increased vascular resistance and reduction of portal blood flow by intra-operative phenylephrine infusion is assumed to decrease the amount of intra-operative bleeding and thereby ameliorate the progression of lactic acidosis during liver transplant surgery.
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Choi H, Lee J, Koh SH, Lee YJ, Lee KY. Teaching Neuro Images: CSF leaks and spontaneous intracranial hypotension. Neurology 2012; 79:e176. [DOI: 10.1212/wnl.0b013e3182735c56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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230
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Kim T, Kim S, Bae H, Lee S, Ahn K, Song J, Choi H. Evaluation of Risk Factors of Vaginal Cuff Problem after Hysterectomy. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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231
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Choi H, Park H, Kim Y. Foot-Ankle Roll-Over Characteristics in Different Heel Heights during Walking. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2012; 2005:6882-4. [PMID: 17281856 DOI: 10.1109/iembs.2005.1616087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this study, a feasibility study was performed for biomechanical applications of foot-ankle roll-over characteristics in different heel height shoes during walking. Five nondisabled female volunteers were participated in gait experiments, wearing four pairs of shoes with different heel heights. Roll-over shapes of the foot-ankle systems were obtained using trajectories of ankle, knee and the center of pressure between initial contact (IC) and opposite initial contact(OIC). Results showed that roll-over trajectories moved downwards with higher heel shoes but roll-over characteristics, represented by an arc, did not change significantly with different heel heights. The present results also support that nondisabled humans automatically adapt their foot-ankle systems to varying heel height shoes under 6cm. Roll-over characteristics in human walking will contribute future designs of prosthetics and orthotics of lower extremity as well as orthopaedic shoes.
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Kim T, Park J, Hur S, Lee S, Lee W, Kim S, Hong S, Choi H, Cho C, Kim K. M352 THE ESTABLISHMENT OF THE KOREAN HUMAN PAPILLOMAVIRUS COHORT STUDY. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61543-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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233
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Son E, Shim J, Choi H, Kim H, Lim K, Chung J, Byun S, Lee T. Cathepsin G Inhibitor Prevents Ultraviolet B- Induced Photoaging in Hairless Mice via Inhibition of Fibronectin Fragmentation. Dermatology 2012; 224:352-60. [DOI: 10.1159/000339337] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 05/08/2012] [Indexed: 11/19/2022] Open
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234
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Xu JQ, Chen LY, Choi H, Li XC. Theoretical study and pathways for nanoparticle capture during solidification of metal melt. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:255304. [PMID: 22640981 DOI: 10.1088/0953-8984/24/25/255304] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanocomposites can provide exciting physical, chemical, and mechanical properties for numerous applications. The solidification processing method has great potential for economical fabrication of bulk nanocomposites, especially for those with crystalline materials as the matrix, such as metal matrix nanocomposites (MMNCs). However, it is extremely difficult to effectively capture nanoparticles (less than 100 nm) into the solidification fronts during solidification. It is thus very important to initiate a theoretical study to examine the physics that governs the interactions between nanoparticles and the solidification front, and to provide enabling pathways for effective nanoparticle capture during solidification. The aim of this paper is to establish a theoretical framework for the fundamental understanding of nanoparticle capture during solidification of metal melt in order to obtain bulk MMNCs. A thermodynamically favorable condition is set as the starting point for further theoretical analysis of the three-party model system, namely a nanoparticle-metal-melt-solidification front. Three key interaction potentials, the interfacial energy at short range (0.2-0.4 nm), the van der Waals potential (especially at a longer range beyond 0.4 nm and up to ∼10 nm) and the Brownian potential, were studied. Three possible pathways for nanoparticle capture were thus devised: viscous capture, Brownian capture and spontaneous capture. Spontaneous capture is proposed as the most favorable for nanoparticle capture during solidification of metal melt. The theoretical model of nanoparticle capture from this study will serve as a powerful tool for future experimental studies to realize exciting functionalities offered by bulk MMNCs.
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Choi H, Wu J. Clinical impact and economic evaluation of organized HPV vaccination program in Hong Kong. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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236
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Han QF, Jeong YI, Heo JH, Shin CM, Ryu H, Park MS, Lee WJ, Yoon JH, Yang JE, Choi H. Magnesium-doped zinc oxide electrochemically grown on fluorine-doped tin oxide substrate. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2012; 12:3677-3681. [PMID: 22849195 DOI: 10.1166/jnn.2012.5634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanostructures of magnesium (Mg) doped Zinc oxide (ZnO) were successfully deposited on conducting fluorine-doped tin oxide (FTO) coated glass plates by cathodic electrochemical deposition method at different potentials and temperature conditions. The deposited samples were characterized by XRD and SEM techniques to confirm their structures, morphologies and optical properties. These measurements show that Mg doped ZnO has a wurtzite structure and that the strongest intensity of the (002) peak is found at 60 degrees C and -1.0 V. Tunable transmittance of Mg doped ZnO has a band gap energy from 3.45 eV to 3.82 eV, which is the direct evidence of doping.
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Choi H, Takahashi D, Choi W, Kono K, Kim E. Staircaselike suppression of supersolidity under rotation. PHYSICAL REVIEW LETTERS 2012; 108:105302. [PMID: 22463420 DOI: 10.1103/physrevlett.108.105302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Indexed: 05/31/2023]
Abstract
There are a number of distinct signatures of superfluids, one of which is the appearance of quantized vortices. There have been some attempts to understand the putative supersolid 4He in the vortex framework, but no conclusive evidence that supports the existence of the vortices has been reported. Here, we investigate the rotation velocity dependence of the torsional oscillation of solid 4He at various temperatures. The velocity sweep reveals intriguing periodic staircaselike features below about 300 mK. The staircase patterns show remarkable periodicity, and we interpret these patterns as a consequence of vortex injection. However, there are some features that cannot be accounted for with simple injection of vortices into superfluid, and further investigation is required.
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Choi H, Kim M, Lee H. 34 EFFECTS OF 3-YEAR HORMONE THERAPY, RALOXIFENE AND ALENDRONATE ON SERUM LIPID PROFILE AND BODY MASS INDEX IN POSTMENOPAUSAL WOMEN. Maturitas 2012. [DOI: 10.1016/s0378-5122(12)70145-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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239
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Hurst A, Firestone R, Sleaford B, Summers N, Revay Z, Szentmiklósi L, Belgya T, Basunia M, Capote R, Choi H, Dashdorj D, Escher J, Krticka M, Nichols A. Thermal Neutron Capture onto the Stable Tungsten Isotopes. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20122110005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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240
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White D, Choi H, Peloquin C, Zhu Y, Zhang Y. Secular trend of adhesive capsulitis. Arthritis Care Res (Hoboken) 2011; 63:1571-5. [PMID: 22034118 DOI: 10.1002/acr.20590] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Adhesive capsulitis (AC) is a painful shoulder disorder resulting in restrictions of daily activities. Given the recent increase in risk factors for AC, such as diabetes mellitus, research is needed to examine if the incidence of AC has also increased. Therefore, the purpose of this study was to describe the secular trend of AC. METHODS Subjects were from The Health Improvement Network, an electronic medical record database of general practices across the UK from 1995-2008. General practitioners diagnosed AC. We included subjects ages 40-79 years and defined an incident case as the first diagnosis of AC following at least 1 year of enrollment in the database. We examined the potential independent effects of age, calendar time, and birth cohort using an age-period-cohort model. To approximate effect estimates, we applied proportional hazards models and separately adjusted for diabetes mellitus. RESULTS Of 2,188,958 subjects (50.0% women), the incidence of AC was 2.36 and 3.38 per 1,000 person-years for men and women, respectively. Age-period-cohort model graphs suggested a secular trend due to a birth cohort, but not calendar effect. For each 10-year increment in birth cohort, the incidence rate increased by 8% in women (hazard ratio 1.08, 95% confidence interval 1.05-1.13). There was no increase in AC incidence for men. Adjusting for diabetes mellitus did not change these associations materially. CONCLUSION We found women born more recently are at a higher risk of developing AC compared with women born earlier. Future research is needed to identify risk factors that may be responsible for this increase.
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Singh JC, Stein S, Volm M, Smith J, Novik Y, Speyer J, Adams S, Meyers M, Muggia F, Schneider R, Formenti S, Omene C, Choi H, Davis S, Goldberg J, Tiersten A. P1-17-07: Phase II Trial of RAD001 Plus Carboplatin in Patients with Triple-Negative Metastatic Breast Cancer. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p1-17-07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: RAD001 is an oral mTOR inhibitor that has exhibited activity in breast cancer. Triple negative breast cancer cells are unable to repair double stranded DNA breaks and hence have sensitivity to platinum agents that cause interstrand cross-links. Rapamycin acts synergistically with platinum agents to induce apoptosis and inhibit proliferation in at least two different breast cancer cell lines (including ER/PR negative cell lines). We propose that combination RAD001 and carboplatin may have activity in triple-negative breast cancer.
Methods: The primary objective of the study is to determine clinical benefit (complete remission (CR) + partial remission (PR) + stable disease (SD)) and the toxicity of this combination in women with triple negative metastatic breast cancer who have had 0–3 prior chemotherapy regimens for metastatic disease. Secondary objectives are to determine progression free survival as well as investigating the relationship between pretreatment sensitivity (biopsy at baseline) and clinical response (biopsy post 2 cycles) using IHC staining for abundance of key proteins in the Akt-mTOR pathway and their activity using surrogate phosphorylation site-specific antibodies (Akt and phospho-serine 473, phospho-threonine and phospho-threonine 308 Akt; mTOR and phospho-serine 2448 mTOR; ribosome protein S6 kinase (S6K) and phospho-threonine 378 S6K; 4E-BP1 and phospho-serine 65 4E-BP1). Prior carboplatin is allowed. Women with treated brain metastasis are eligible. According to the original study plan, carboplatin AUC 6, was to be given intravenously every three weeks. Five mg of RAD001 was to be given daily with a 3 patient run-in and then 10 mg daily if there were no dose-limiting toxicities. Due to a unexpected amount of thrombocytopenia with this combination the dose of carboplatin was first amended to AUC 5 and most recently to AUC 4 with 5 mg of RAD001 (and no plan to escalate to 10 mg).
Results: Fourteen patients of a planned 25 have been recruited thus far. Median age is 58.5. Median number of prior regimens is 2 (0-3). Of the 7 patients assessable for response at this time, there have been 2 PR's and 5 patients with SD. One SD was achieved in a patient progressing on single agent carboplatin at study entry. Median duration of SD + PR is 28.5 weeks (5 patients have ongoing response ranging from 8–46.5 weeks). Five of 8 patients assessable for toxicity had grade 3 or 4 thrombocytopenia and 2 patients had grade 3 neutropenia. No cases of febrile neutropenia were observed. Four patients have required blood transfusion and one patient has required platelet transfusion. All patients have had treatment held and/or dose reductions secondary to hematological toxicity, however, since amended carboplatin dose the regimen has been very well tolerated with only one out of six patients) with grade 3 neutropenia and grade 3 thrombocytopenia. There have been no non-hematological grade 3 or 4 toxicities.
Conclusions: Clinical benefit was observed in all 7 assessable patients. Dose limiting thrombocytopenia was an unexpected side effect requiring protocol amendment. We continue to accrue study subjects at the amended dosing.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P1-17-07.
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Choi M, Choi H, Lee J, Shin S, Shin S, Kim D. 414 Development and Implementation of Resuscitation Room Protocol for Cardiac Arrest in Emergency Department. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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243
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Kang H, Cho Y, Choi H, Kang B, Lim T. 355 Comparison of Usefulness Between Linear Probe and Microconvex Probe in Ultrasound-Guided Central Venous Catheterization. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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244
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Kwon O, Lee J, Choi H, Hong H, Ko Y. 209 Do Patients With Severe Acute Calculous Cholangitis Have Specific Characteristics at Computed Tomography? Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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245
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Choi H, Watanabe T. Perceptual learning solely induced by feedback. J Vis 2011. [DOI: 10.1167/11.11.1018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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246
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Singh JC, Stein S, Volm M, Smith JA, Novik Y, Speyer JL, Adams S, Meyers MI, Muggia F, Schneider R, Formenti S, Davis S, Choi H, Tiersten A. Phase II trial of RAD001 plus carboplatin in patients with triple-negative metastatic breast cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.27_suppl.293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
293 Background: RAD001 is an oral mTOR inhibitor that has exhibited activity in breast cancer. Triple negative breast cancer cells are unable to repair double stranded DNA breaks and hence have sensitivity to platinum agents that cause interstrand cross-links. Rapamycin acts synergistically with platinum agents to induce apoptosis and inhibit proliferation in at least two different breast cancer cell lines (including ER/PR negative cell lines). We propose that combination RAD001 and carboplatin may have activity in triple-negative breast cancer. Methods: The primary objective of the study is to determine clinical benefit (complete remission; CR, partial remission; PR and stable disease; SD) and the toxicity of this combination in women with triple negative metastatic breast cancer who had received 0-3 prior chemotherapy regimens for metastatic disease. Prior carboplatin was allowed. Women with treated brain metastasis were eligible. Secondary objectives were to determine progression free survival. According to the original study plan, carboplatin AUC 6, was to be given intravenously every three weeks. 5 mg of RAD001 was to be given daily with a 3 patient run-in and then 10 mg daily if there were no dose-limiting toxicities. Due to a surprising amount of thrombocytopenia with this combination the dose of carboplatin was first amended to AUC 5 and most recently to AUC 4 with 5 mg of RAD001 (and no plan to escalate to 10 mg). Results: Eleven patients of a planned 25 have been recruited thus far. Median age is 62. Median number of prior regimens is 1. Of the 6 patients assessable for response at this time, four have SD and two have had a PR. 1 SD was achieved in a patient progressing on prior carboplatin at study entry. Five of 7 patients assessable for toxicity had grade 3 or 4 thrombocytopenia and 2 patients had grade 3 neutropenia. All patients have had treatment held and/or dose reductions secondary to hematological toxicity. There have been no non-hematological grade 3 or 4 toxicities. Conclusions: Clinical benefit was observed in all 6 evaluable patients. Dose limiting thrombocytopenia was an unexpected side effect requiring protocol amendment. We continue to accrue study subjects at the amended dosing.
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Jo J, Lee S, Moon H, Park H, Lee T, Choi H. UP-01.211 Comparison Between the Group Who Showed Pain Relief by Alpha Blocker Agent and the Group Who Did Not in Patients with CP/CPPS. Urology 2011. [DOI: 10.1016/j.urology.2011.07.761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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248
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Lee H, Kim S, Choi H, Noh D, Cho M, Lee K. UP-03.091 Can a Radiologic Finding Predict the Outcome of Extracorporeal Shockwave Lithotripsy for Ureteral Stone? Urology 2011. [DOI: 10.1016/j.urology.2011.07.1181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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249
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Kim MS, Choi H, Choi KC, Shin BS. Primary cutaneous nocardiosis due to Nocardia vinacea: first case in an immunocompetent patient. Clin Exp Dermatol 2011; 36:812-4. [PMID: 21883390 DOI: 10.1111/j.1365-2230.2011.04090.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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250
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Okamoto T, Chen F, Zhang J, Choi H, Yamada T, Morikawa H, Nakayama E, Bando T, Date H. Comparison of Extracellular-Type–Kyoto Solution and Perfadex as a Preservation Solution in a Pig Ex Vivo Lung Perfusion Model: Impact of Potassium Level. Transplant Proc 2011; 43:1525-8. [DOI: 10.1016/j.transproceed.2011.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2010] [Revised: 02/02/2011] [Accepted: 03/01/2011] [Indexed: 11/16/2022]
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