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https://www.readbyqxmd.com/read/28640950/development-of-a-monte-carlo-multiple-source-model-for-inclusion-in-a-dose-calculation-auditing-tool
#1
Austin M Faught, Scott E Davidson, Jonas Fontenot, Stephen F Kry, Carol Etzel, Geoffrey S Ibbott, David S Followill
PURPOSE: The Imaging and Radiation Oncology Core Houston (IROC-H) (formerly the Radiological Physics Center) has reported varying levels of agreement in their anthropomorphic phantom audits. There is reason to believe one source of error in this observed disagreement is the accuracy of the dose calculation algorithms and heterogeneity corrections used. To audit this component of the radiotherapy treatment process an independent dose calculation tool is needed. METHODS: Monte Carlo multiple source models for Elekta 6MV and 10MV therapeutic x-ray beams were commissioned based on measurement of central axis depth dose data for a 10 x 10 cm(2) field size and dose profiles for a 40 x 40 cm(2) field size...
June 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28637033/quantitative-swept-source-optical-coherence-tomography-of-early-enamel-erosion-in-vivo
#2
Rupert S Austin, Maisalamah Haji Taha, Frederic Festy, Richard Cook, Manoharan Andiappan, Juliana Gomez, Iain A Pretty, Rebecca Moazzez
Swept-source optical coherence tomography (SS-OCT) shows potential for the in vivo quantitative evaluation of micro-structural enamel surface phenomena occurring during early erosive demineralization. This randomized controlled single-blind cross-over clinical study aimed to evaluate the use of SS-OCT for detecting optical changes in the enamel of 30 healthy volunteers subjected to orange juice rinsing (erosive challenge) in comparison to mineral water rinsing (control), according to wiped and non-wiped enamel surface states...
June 22, 2017: Caries Research
https://www.readbyqxmd.com/read/28636939/the-super-enhancer-derived-alncrna-ec7-bloodlinc-potentiates-red-blood-cell-development-in%C3%A2-trans
#3
Juan R Alvarez-Dominguez, Marko Knoll, Austin A Gromatzky, Harvey F Lodish
Enhancer-derived RNAs are thought to act locally by contributing to their parent enhancer function. Whether large domains of clustered enhancers (super-enhancers) also produce cis-acting RNAs, however, remains unclear. Unlike typical enhancers, super-enhancers form large spans of robustly transcribed chromatin, amassing capped and polyadenylated RNAs that are sufficiently abundant to sustain trans functions. Here, we show that one such RNA, alncRNA-EC7/Bloodlinc, is transcribed from a super-enhancer of the erythroid membrane transporter SLC4A1/BAND3 but diffuses beyond this site...
June 20, 2017: Cell Reports
https://www.readbyqxmd.com/read/28635260/development-validation-and-inter-laboratory-evaluation-of-a-quantitative-multiplexing-method-to-assess-levels-of-ten-endogenous-allergens-in-soybean-seed-and-its-application-to-field-trials-spanning-three-growing-seasons
#4
Ryan Christopher Hill, Trent J Oman, Xiujuan Wang, Guomin Shan, Barry Schafer, Rod A Herman, Rowel Tobias, Jeff Shippar, Bhaskar Malayappan, Li Sheng, Austin Xu, Jason Bradshaw
As part of the regulatory approval process in Europe, comparison of endogenous soybean allergen levels between genetically engineered (GE) and non-GE plants has been requested. A quantitative multiplex analytical method using tandem mass spectrometry has been developed and validated to measure ten potential soybean allergens from soybean seed. The analytical method was implemented at six laboratories to demonstrate the robustness of the method and further applied to three soybean field studies across multiple growing seasons (including 21 non-GE soybean varieties) to assess the natural variation of allergen levels...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28634720/the-financial-impact-and-drivers-of-hospital-charges-in-contralateral-prophylactic-mastectomy-and-reconstruction-a-nationwide-inpatient-sample-hospital-analysis
#5
Alexandra Bucknor, Anmol Chattha, Klaas Ultee, Winona Wu, Parisa Kamali, Patrick Bletsis, Austin Chen, Bernard T Lee, Claire Cronin, Samuel J Lin
PURPOSE: Rates of contralateral prophylactic mastectomy (CPM) have increased over the last decade; it is important for surgeons and hospital systems to understand the economic drivers of increased costs in these patients. This study aims to identify factors affecting charges in those undergoing CPM and reconstruction. METHODS: Analysis of the Healthcare Cost and Utilization Project National Inpatient Sample was undertaken (2009-2012), identifying women aged ≥18 with unilateral breast cancer undergoing unilateral mastectomy with CPM and immediate breast reconstruction (IBR) (CPM group), in addition to unilateral mastectomy and IBR alone (UM group)...
June 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28633723/validated-measures-of-insomnia-function-sleepiness-and-nasal-obstruction-in-a-cpap-alternatives-clinic-population
#6
Austin S Lam, Nancy A Collop, Donald L Bliwise, Raj C Dedhia
STUDY OBJECTIVES: Although efficacious in the treatment of obstructive sleep apnea (OSA), continuous positive airway pressure (CPAP) can be difficult to tolerate, with long-term adherence rates approaching 50%. CPAP alternatives clinics specialize in the evaluation and treatment of CPAP-intolerant patients; yet this population has not been studied in the literature. To better understand these patients, we sought to assess insomnia, sleep-related functional status, sleepiness, and nasal obstruction, utilizing data from validated instruments...
June 16, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28632618/accounting-for-planned-postoperative-intubation
#7
Thomas M Austin, Humphrey Lam
No abstract text is available yet for this article.
July 2017: Anesthesiology
https://www.readbyqxmd.com/read/28632589/emergency-department-visits-following-elective-total-hip-and-knee-replacement-surgery-identifying-gaps-in-continuity-of-care
#8
Micaela A Finnegan, Robyn Shaffer, Austin Remington, Jereen Kwong, Catherine Curtin, Tina Hernandez-Boussard
BACKGROUND: Major joint replacement surgical procedures are common, elective procedures with a care episode that includes both inpatient readmissions and postoperative emergency department (ED) visits. Inpatient readmissions are well studied; however, to our knowledge, little is known about ED visits following these procedures. We sought to characterize 30-day ED visits following a major joint replacement surgical procedure. METHODS: We used administrative records from California, Florida, and New York, from 2010 through 2012, to identify adults undergoing total knee and hip arthroplasty...
June 21, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28632583/incremental-balloon-deflation-following-complete-resuscitative-endovascular-balloon-occlusion-of-the-aorta-results-in-steep-inflection-of-flow-and-rapid-reperfusion-in-a-large-animal-model-of-hemorrhagic-shock
#9
Anders J Davidson, Rachel M Russo, Sarah-Ashley E Ferencz, Jeremy W Cannon, Todd E Rasmussen, Lucas P Neff, M Austin Johnson, Timothy K Williams
INTRODUCTION: To avoid potential cardiovascular collapse after resuscitative endovascular balloon occlusion of the aorta (REBOA), current guidelines recommend methodically deflating the balloon for 5 minutes to gradually reperfuse distal tissue beds. However, anecdotal evidence suggests that this approach may still result in unpredictable aortic flow rates and hemodynamic instability. We sought to characterize aortic flow dynamics following REBOA as the balloon is deflated in accordance with current practice guidelines...
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28632582/the-effect-of-resuscitative-endovascular-balloon-occlusion-of-the-aorta-partial-aortic-occlusion-and-aggressive-blood-transfusion-on-traumatic-brain-injury-in-a-swine-multiple-injuries-model
#10
M Austin Johnson, Timothy K Williams, Sarah-Ashley E Ferencz, Anders J Davidson, Rachel M Russo, William T O'Brien, Joseph M Galante, J Kevin Grayson, Lucas P Neff
BACKGROUND: Despite clinical reports of poor outcomes, the degree to which resuscitative endovascular balloon occlusion of the aorta (REBOA) exacerbates traumatic brain injury (TBI) is not known. We hypothesized that combined effects of increased proximal mean arterial pressure (pMAP), carotid blood flow (Qcarotid), and intracranial pressure (ICP) from REBOA would lead to TBI progression compared with partial aortic occlusion (PAO) or no intervention. METHODS: Twenty-one swine underwent a standardized TBI via computer Controlled cortical impact followed by 25% total blood volume rapid hemorrhage...
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28631577/the-impact-of-opioid-medications-on-subsequent-fractures-in-discharged-emergency-department-patients-with-peripheral-vertigo
#11
Keerat Grewal, Peter C Austin, Moira K Kapral, Hong Lu, Clare L Atzema
BACKGROUND: Vertigo is common in the emergency department (ED). Most aetiologies are peripheral and do not require hospitalization, but many patients still fear falling. Some patients may be taking opioid analgesic medications (for other reasons); the risk of falls leading to fractures among patients with vertigo could be potentiated by the simultaneous use of opioids. OBJECTIVES: To examine the risk of fractures in discharged ED patients with peripheral vertigo who were being prescribed opioids during the same time period...
June 20, 2017: CJEM
https://www.readbyqxmd.com/read/28630716/femoral-neck-fractures-as-a-complication-of-hip-arthroscopy-a-systematic-review
#12
REVIEW
Nolan S Horner, Khanduja Vikas, Austin E MacDonald, Jan-Hendrik Naendrup, Nicole Simunovic, Olufemi R Ayeni
The purpose of this study was to identify the causes and risk factors for hip fractures, a rare but devastating complication, following hip arthroscopy. The electronic databases MEDLINE, EMBASE and PubMed were searched and screened in duplicate for relevant clinical and basic sciences studies and pertinent data was abstracted and analysed in Microsoft Excel. Nineteen studies (12 clinical studies and seven biomechanical studies) with a total of 31 392 patients experiencing 43 hip fractures (0.1% of patients) met the inclusion criteria for this systematic review...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28630212/a-pilot-study-of-stereotactic-body-radiation-therapy-combined-with-cytoreductive-nephrectomy-for-metastatic-renal-cell-carcinoma
#13
Anurag K Singh, Timothy B Winslow, Mohammad Habiby Kermany, Vincent Goritz, Lilia Heit, Austin Miller, Nicholas C Hoffend, Leighton C Stein, Lalith Kumaraswamy, Graham W Warren, Wiam Bshara, Kunle Odunsi, Junko Matsuzaki, Scott I Abrams, Thomas Schwaab, Jason B Muhitch
<p>While stereotactic body radiation therapy (SBRT) can reduce tumor volumes in metastatic renal cell carcinoma (mRCC) patients, little is known regarding the immunomodulatory effects of high-dose radiation in the tumor microenvironment. The main objectives of this pilot study were to assess the safety and feasibility of nephrectomy following SBRT treatment of mRCC patients and analyze the immunological impact of high-dose radiation.</p> <br /><br />Experimental Design: Human RCC cell lines were irradiated and evaluated for immunomodulation...
June 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28629843/implanting-a-mechanical-valve-in-the-pulmonary-position-what-s-your-bias
#14
EDITORIAL
Erle H Austin
No abstract text is available yet for this article.
May 18, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28628877/remediation-of-groundwater-contaminated-with-arsenic-through-enhanced-natural-attenuation-batch-and-column-studies
#15
Saeedreza Hafeznezami, Amity G Zimmer-Faust, Dukwoo Jun, Megyn B Rugh, Heather L Haro, Austin Park, Jae Suh, Tina Najm, Matthew D Reynolds, James A Davis, Tarannom Parhizkar, Jennifer A Jay
Batch and column laboratory experiments were conducted on natural sediment and groundwater samples from a contaminated site in Maine, USA with the aim of lowering the dissolved arsenate [As(V)] concentrations through chemical enhancement of natural attenuation capacity. In batch factorial experiments, two levels of treatment for three parameters (pH, Ca, and Fe) were studied at different levels of phosphate to evaluate their impact on As(V) solubility. Results illustrated that lowering pH, adding Ca, and adding Fe significantly increased the sorption capacity of sediments...
June 12, 2017: Water Research
https://www.readbyqxmd.com/read/28627806/improving-the-quantum-yields-of-perylene-diimide-aggregates-by-increasing-molecular-hydrophobicity-in-polar-media
#16
Jodi Szarko, Jürgen Plenge, Xiaoyu Xu, Ashli Austin, Steven Mylon
Here we report the quantum yield of four aggregated perylene diimide (PDI) species that vary by the length of the branched side chains attached at the N,N' imide positions. The PDI molecules were dissolved in binary water:methanol solvents as a means to vary the solvent polarity and control the degree of aggregation in solution. By performing spectroscopy, kinetics, and light scattering experiments, the nature of the molecular interactions in the solutions was determined. The maximum quantum yield of the aggregated molecules increased from 0...
June 19, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28626075/sex-differences-in-vascular-physiology-and-pathophysiology-estrogen-and-androgen-signaling-in-health-and-disease
#17
Austin C Boese, Seong Chul Kim, Ke-Jie Yin, Jean-Pyo Lee, Milton H Hamblin
Sex differences between women and men are often overlooked and underappreciated when studying the cardiovascular system. It has been long assumed that men and women are physiologically similar, and this notion has resulted in females being clinically evaluated and treated for cardiovascular pathophysiological complications as males. Currently, there is increased recognition of fundamental sex differences in cardiovascular function, anatomy, cell signaling, and pathophysiology. NIH has enacted guidelines expressly to gain knowledge about ways the sexes differ in both normal function and diseases at the various research levels (molecular, cellular, tissue, organ, system)...
June 16, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28625829/combinatorial-immunotherapy-and-nanoparticle-mediated-hyperthermia
#18
Austin J Moy, James W Tunnell
Immune checkpoint therapy has become the first widely adopted immunotherapy for patients with late stage malignant melanoma, with potential for a wide range of cancers. While some patients can experience long term disease remission, this is limited only to a subset of patients and tumor types. The path forward to expand this therapy to more patients and tumor types is currently thought to be combinatorial treatments, the combination of immunotherapy with other treatments. In this review, the combinatorial approach of immune checkpoint therapy combined with nanoparticle-assisted localized hyperthermia is discussed, starting with an overview of the different nanoparticle hyperthermia approaches in development, an overview of the state of immune checkpoint therapy, recent reports of immune checkpoint therapy and nanoparticle-assisted hyperthermia in a combinatorial approach, and finally a discussion of future research topics and areas to be explored in this new combinatorial approach to cancer treatment...
June 15, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28625373/high-risk-echocardiographic-features-predict-mortality-in-pulmonary-arterial-hypertension
#19
Christopher Austin, Charles Burger, Garvan Kane, Robert Safford, Joseph Blackshear, Ryan Ung, Jordan Ray, Ali Alsaad, Khadija Alassas, Brian Shapiro
AIMS: Echocardiography is the most common imaging modality for assessment of the right ventricle in patients with pulmonary arterial hypertension (PAH). Echocardiographic parameters were identified as independent risk factors for mortality in the Registry to Evaluate Early and Long-term PAH Disease Management (REVEAL) and other PAH cohorts. We sought to identify readily obtained echocardiographic features associated with PAH survival. METHODS AND RESULTS: Retrospective analysis of 175 patients with Group 1 was performed...
July 2017: American Heart Journal
https://www.readbyqxmd.com/read/28622348/factors-influencing-practitioner-adoption-of-carer-led-assessment-in-palliative-homecare-a-qualitative-study-of-the-use-of-the-carer-support-needs-assessment-tool-csnat
#20
Lynn Austin, Gail Ewing, Gunn Grande
INTRODUCTION: Informal caregivers play a pivotal role in supporting patients approaching the end of life. The Carer Support Needs Assessment Tool (CSNAT) is designed to facilitate person-centred assessment and support through a process that is practitioner-facilitated, but carer-led. This study explored practitioners' experiences of implementing the CSNAT in palliative homecare. METHODS: We conducted qualitative interviews/focus groups with 20 practitioners in one UK hospice homecare service (18 nurses, two healthcare assistants) before and after the implementation of the CSNAT...
2017: PloS One
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