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Patel R, Lee J, Walker C, Eaton D. PO-0913: A national review of equipment, techniques and PTV margins used for SRS. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31350-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Martin A, Andrew P, Jokinen T, Komarov V, Kukushkin A, Loarte A, Maruyama S, Merola M, Palmer J, Pearce R, Pick M, Pitts R, Walker C. ITER Divertor System Integration. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst09-a8877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Richter-Schrag HJ, Walker C, Thimme R, Fischer A. [Full thickness resection device (FTRD). Experience and outcome for benign neoplasms of the rectum and colon]. Chirurg 2017; 87:316-25. [PMID: 26438202 DOI: 10.1007/s00104-015-0091-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND The diagnostic validity of a full-thickness resection is higher compared to endoscopic mucosal resection (EMR) or endoscopic mucosal dissection (ESD). Whereas transanal endoscopic microsurgery techniques (TEM, TAMIS) are established therapeutic procedures in the rectum no established and safe minimally invasive or endoscopic procedure exists in the colon. AIM In this study the novel endoscopic full thickness resection device (FTRD, Ovesco, Germany) was investigated concerning success rates with histologically proven full thickness resections, R0 status as well as patient and device safety for the rectum and colon. METHOD In the period from November 2014 to June 2015 full thickness resections in the rectum and colon were performed with the FTRD in 20 patients. Data on technical success, R0 resection rate and histologically confirmed full thickness resections were retrospectively analyzed. RESULTS The following indications were treated in the rectum (n = 11) and colon (n = 9): T1 carcinoma (n = 6) and neuroendocrine tumors (n = 2), untreated and nonlifting adenomas (n = 3) and incomplete resection of adenomas with low and high grade dysplasia (n = 9). The technical success rate was 75 %, 3 technical failures made a conventional polypectomy necessary in 2 patients and in 1 patient an operative resection of the duplicated intestinal wall had to be performed. The median endoscopic follow-up time was 61.5 days (n = 10) and in 7 patients the clip had dislodged at the first follow-up. A thermal perforation in one case of conventional polypectomy gave rise to indications for a partial resection of the colon. In one patient the lesion in the cecum could be reached but not treated for technical reasons. The histological R0 rate was 80 %, whereas the full thickness resection rate was 60 % (85.7 % in the colon and 54.6 % in the rectum). In two patients with carcinoma and incomplete FTRD, surgical treatment was performed. The median size of the resection specimen was 5 cm(2) (range 1.6-12.9 cm(2)). CONCLUSION The results show that FTRD is a safe and effective instrument for use in the lower gastrointestinal tract. Limitations of the FTRD system concerning full thickness resection are scarring, fibrosis and thickness of the intestinal wall, especially in the lower rectum; therefore, it is suggested that a simulation with a tube similar in size to the FTRD should be performed during the screening colonoscopy in order to establish whether an endoscopic resection with FTRD is possible.
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Rosenthal LM, Walker C, Tong G, Berger F, Schmitt K. Moderate Hypothermia after Hypoxia Is Neuroprotective Possibly via Upregulation of Cold Shock Protein RBM3. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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56
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Haber H, Xing G, Walker C. 21: Prenatal infections and risk of autism, intellectual disability and/or epilepsy. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.09.022] [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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Hollinshead FK, Walker C, Hanlon DW. Determination of the normal reference interval for anti-Müllerian hormone (AMH) in bitches and use of AMH as a potential predictor of litter size. Reprod Domest Anim 2016; 52 Suppl 2:35-40. [DOI: 10.1111/rda.12822] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Prusinski L, Yang Q, Mas A, Diamond M, Walker C, Al-Hendy A. Early-life exposure to endocrine-disrupting chemicals (EDCs) leads to the development ofuterine fibroids by impairing DNA repair capacity in myometrial stem cells. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Krech J, Cormann SB, Walker C, Tong G, Berger F, Schmitt K. Cardioprotective Effect of Intraischemic Therapeutic Hypothermia in Primary Cardiomyocytes. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pickles R, Iqbal S, Atherton P, Turnbull H, Mcmenemin R, Walker C, Pilling K, Muller M, Mott J, Mccallum H. 131 Preliminary results of prospective data for patients receiving stereotactic ablative radiotherapy (SABR) for early stage non-small cell lung cancer (NSCLC). Lung Cancer 2016. [DOI: 10.1016/s0169-5002(16)30148-9] [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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Walker C, Muniz M, Rolim J, Martins R, Rosenthal V, Maciel C, Mezzomo R, Reiniger L. Morphological and molecular characterization of Cladosporium cladosporioides species complex causing pecan tree leaf spot. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr8714. [DOI: 10.4238/gmr.15038714] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lane CR, Sutton B, Valcanis M, Kirk M, Walker C, Lalor K, Stephens N. Travel Destinations and Sexual Behavior as Indicators of Antibiotic Resistant Shigella Strains--Victoria, Australia. Clin Infect Dis 2015; 62:722-729. [PMID: 26679624 DOI: 10.1093/cid/civ1018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 12/04/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Knowledge of relationships between antibiotic susceptibility of Shigella isolates and travel destination or other risk factors can assist clinicians in determining appropriate antibiotic therapy prior to susceptibility testing. We describe relationships between resistance patterns and risk factors for acquisition in Shigella isolates using routinely collected data for notified cases of shigellosis between 2008 and 2012 in Victoria, Australia. METHODS We included all shigellosis patients notified during the study period, where Shigella isolates were tested for antimicrobial sensitivity using Clinical and Laboratory Standards Institute breakpoints. Cases were interviewed to collect data on risk factors, including recent travel. Data were analyzed using Stata 13.1 to examine associations between risk factors and resistant strains. RESULTS Of the 500 cases of shigellosis, 249 were associated with overseas travel and 210 were locally acquired. Forty-six of 51 isolates of Indian origin displayed decreased susceptibility or resistance to ciprofloxacin. All isolates of Indonesian origin were susceptible to ciprofloxacin. Twenty-six travel-related isolates were resistant to all tested oral antimicrobials. Male-to-male sexual contact was the primary risk factor for 80% (120/150) of locally acquired infections among adult males, characterized by distinct periodic Shigella sonnei outbreaks. CONCLUSIONS Clinicians should consider travel destination as a marker for resistance to common antimicrobials in returning travelers, where severe disease requires empirical treatment prior to receipt of individual sensitivity testing results. Repeated outbreaks of locally acquired shigellosis among men who have sex with men highlight the importance of prevention and control measures in this high-risk group.
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Datta D, Grahamslaw J, Gray AJ, Walker C, Graham C. LAVAS: LACTATE—ARTERIAL AND VENOUS AGREEMENT IN SEPSIS. Arch Emerg Med 2015. [DOI: 10.1136/emermed-2015-205372.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gadkaree S, Best S, Walker C, Akst L, Hillel A. Patient tolerance of transoral versus percutaneous thyrohyoid office-based injection laryngoplasty: a case-controlled study of forty-one patients. Clin Otolaryngol 2015; 40:717-21. [DOI: 10.1111/coa.12436] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2015] [Indexed: 11/29/2022]
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Ludlow JB, Timothy R, Walker C, Hunter R, Benavides E, Samuelson DB. Correction to Effective dose of dental CBCT--a meta analysis of published data and additional data for nine CBCT units. Dentomaxillofac Radiol 2015; 44:20159003. [PMID: 25874892 DOI: 10.1259/dmfr.20159003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Rosenbrier Ribeiro L, Wagoner M, Kelsall J, Walker C, Crosby M, Sadler C. Translational analysis of c-kit kinase to justify inclusion as a screen in early discovery to aid bone marrow risk assessment. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mas A, Elam L, Walker C, Simon C, Diamond M, Thompson W, Al-Hendy A. Early life exposure to estrogen-mimics increase the occurrence of uterine fibroids via expansion of myometrial stem cell population. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.089] [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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Ludlow JB, Timothy R, Walker C, Hunter R, Benavides E, Samuelson DB, Scheske MJ. Effective dose of dental CBCT-a meta analysis of published data and additional data for nine CBCT units. Dentomaxillofac Radiol 2015; 44:20140197. [PMID: 25224586 DOI: 10.1259/dmfr.20140197] [Citation(s) in RCA: 268] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES This article analyses dose measurement and effective dose estimation of dental CBCT examinations. Challenges to accurate calculation of dose are discussed and the use of dose-height product (DHP) as an alternative to dose-area product (DAP) is explored. METHODS The English literature on effective dose was reviewed. Data from these studies together with additional data for nine CBCT units were analysed. Descriptive statistics, ANOVA and paired analysis are used to characterize the data. RESULTS PubMed and EMBASE searches yielded 519 and 743 publications, respectively, which were reduced to 20 following review. Reported adult effective doses for any protocol ranged from 46 to 1073 µSv for large fields of view (FOVs), 9-560 µSv for medium FOVs and 5-652 µSv for small FOVs. Child effective doses from any protocol ranged from 13 to 769 µSv for large or medium FOVs and 7-521 µSv for small FOVs. Effective doses from standard or default exposure protocols were available for 167 adult and 52 child exposures. Mean adult effective doses grouped by FOV size were 212 µSv (large), 177 µSv (medium) and 84 µSv (small). Mean child doses were 175 µSv (combined large and medium) and 103 µSv (small). Large differences were seen between different CBCT units. Additional low-dose and high-definition protocols available for many units extend the range of doses. DHP was found to reduce average absolute error for calculation of dose by 45% in comparison with DAP. CONCLUSIONS Large exposure ranges make CBCT doses difficult to generalize. Use of DHP as a metric for estimating effective dose warrants further investigation.
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Furian N, O’Sullivan M, Walker C, Vössner S, Neubacher D. A conceptual modeling framework for discrete event simulation using hierarchical control structures. SIMULATION MODELLING PRACTICE AND THEORY 2015; 56:82-96. [PMID: 26778940 PMCID: PMC4687135 DOI: 10.1016/j.simpat.2015.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 04/17/2015] [Accepted: 04/18/2015] [Indexed: 06/05/2023]
Abstract
Conceptual Modeling (CM) is a fundamental step in a simulation project. Nevertheless, it is only recently that structured approaches towards the definition and formulation of conceptual models have gained importance in the Discrete Event Simulation (DES) community. As a consequence, frameworks and guidelines for applying CM to DES have emerged and discussion of CM for DES is increasing. However, both the organization of model-components and the identification of behavior and system control from standard CM approaches have shortcomings that limit CM's applicability to DES. Therefore, we discuss the different aspects of previous CM frameworks and identify their limitations. Further, we present the Hierarchical Control Conceptual Modeling framework that pays more attention to the identification of a models' system behavior, control policies and dispatching routines and their structured representation within a conceptual model. The framework guides the user step-by-step through the modeling process and is illustrated by a worked example.
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Sellers RM, Payne JB, Yu F, LeVan TD, Walker C, Mikuls TR. TLR4
Asp299Gly polymorphism may be protective against chronic periodontitis. J Periodontal Res 2015; 51:203-11. [DOI: 10.1111/jre.12299] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2015] [Indexed: 12/14/2022]
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Ji X, Cappelleri J, Solem C, Liu S, Shelbaya A, Walker C. THU0447 Treatment Adherence, Persistence, and Switch to Generic Nsaids in Patients with Osteoarthritis (OA) Prescribed Celecoxib: Us Retrospective Claims Database Analysis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Jansoniene O, Caliandro F, Day H, Walker C, Kuppurao L. Does off pump coronary artery bypass (OPCAB) surgery reduces transfusion requirements? J Cardiothorac Vasc Anesth 2015. [DOI: 10.1053/j.jvca.2015.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jansoniene O, Karmali A, McGovern I, Walker C, Kuppurao L. Can we predict acute kidney injury (AKI) following coronary artery bypass surgery (CABG)? J Cardiothorac Vasc Anesth 2015. [DOI: 10.1053/j.jvca.2015.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Livingston PM, Guest CS, Stanislavsky Y, Lee S, Bayley S, Walker C, McKean C, Taylor HR. A population-based estimate of cataract prevalence: the Melbourne Visual Impairment Project experience. DEVELOPMENTS IN OPHTHALMOLOGY 2015; 26:1-6. [PMID: 7895874 DOI: 10.1159/000423753] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Gains JE, Walker C, Sullivan TM, Waddington WA, Fersht NL, Sullivan KP, Armstrong E, D'Souza DP, Aldridge MD, Bomanji JB, Gaze MN. Radiation exposure to comforters and carers during paediatric molecular radiotherapy. Pediatr Blood Cancer 2015; 62:235-239. [PMID: 25284346 DOI: 10.1002/pbc.25250] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 08/08/2014] [Indexed: 11/07/2022]
Abstract
BACKGROUND To show whether the incidental radiation exposure received by comforters and carers of children undergoing molecular radiotherapy was kept as low as reasonably achievable and was within English national dose constraints. PROCEDURE The radiation exposure of adult comforters and carers was routinely monitored with a whole body personal dose meter while the child was in hospital. Data were collected on iodine-131 meta-iodobenzylguanidine (131 I-mIBG), lutetium-177 DOTATATE (177 Lu-DOTATATE), and iodine-131 sodium iodide (131 I-NaI) treatments. RESULTS Data were available for 50 treatments with high-administered activity double-infusion 131 I-mIBG and 12 single administrations; 15 177 Lu-DOTATATE treatments and 28 131 I-NaI administrations. The median age was 7 years (1-18). The median administered activity of: 131 I-mIBG was 16.2 GBq (6.8-59 GBq) for double infusion patients and 8.1 GBq (5.26-16.25 GBq) for single administrations; 177 Lu-DOTATATE was 7.2 GBq (2.5-7.5 GBq); and 131 I-NaI was 3 GBq for thyroid remnant ablation and 5.5 GBq for cancer therapy. The median number of comforters and carers for all administrations was 2 (range 1-9). The median exposure values for comforters and carers for high-administered activity 131 I-mIBG administrations was 302 µSv (0-5282 µSv); for single fraction 131 I-mIBG 163 µSv (3-3104 µSv); 177 Lu-DOTATATE 6 µSv (1-79 µSv); and 131 I-NaI 37 µSv (0-274 µSv). Only one of the comforters and carers exceeded the dose constraint of 5 mSv. CONCLUSIONS Doses to comforters and carers were in all but one case within the dose constraint nationally recommended by the Health Protection Agency, now part of Public Health England. New evidence is presented which show that comforter and carer radiation exposure levels from paediatric molecular radiotherapy in routine clinical practice are acceptably low. Pediatr Blood Cancer 2015;62:235-239. © 2014 Wiley Periodicals, Inc.
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