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https://www.readbyqxmd.com/read/28449491/characteristics-and-provision-of-care-of-patients-with-the-acute-respiratory-distress-syndrome-descriptive-findings-from-the-dacapo-cohort-baseline-and-comparison-with-international-findings
#1
Frank Dodoo-Schittko, Susanne Brandstetter, Magdalena Brandl, Sebastian Blecha, Michael Quintel, Steffen Weber-Carstens, Stefan Kluge, Patrick Meybohm, Caroline Rolfes, Björn Ellger, Friedhelm Bach, Tobias Welte, Thomas Muders, Kathrin Thomann-Hackner, Thomas Bein, Christian Apfelbacher
BACKGROUND: Little is known about the characteristics and real world life circumstances of ARDS (acute respiratory distress syndrome) patient populations. This knowledge is essential for transferring evidence-based therapy into routine healthcare. The aim of this study was to report socio-demographic and clinical characteristics in an unselected population of ARDS patients and to compare these results to findings from other large ARDS cohorts. METHODS: A German based cross-sectional observational study was carried out...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449033/response-assessment-in-medulloblastoma-and-leptomeningeal-seeding-tumors-recommendations-from-the-response-assessment-in-pediatric-neuro-oncology-committee
#2
Katherine E Warren, Gilbert Vezina, Tina Y Poussaint, Monika Warmuth-Metz, Marc C Chamberlain, Roger J Packer, Alba A Brandes, Moshe Reiss, Stewart Goldman, Michael J Fisher, Ian F Pollack, Michael D Prados, Patrick Y Wen, Susan M Chang, Christelle Dufour, David Zurakowski, Rolf D Kortmann, Mark W Kieran
Lack of standard response criteria in clinical trials for medulloblastoma and other seeding tumors complicates assessment of therapeutic efficacy and comparisons across studies. An international working group was established to develop consensus recommendations for response assessment. The aim is that these recommendations be prospectively evaluated in clinical trials, with the goal of achieving more reliable risk stratification and uniformity across clinical trials. Current practices and literature review were performed to identify major confounding issues and justify subsequently developed recommendations; in areas lacking scientific investigations, recommendations were based on experience of committee members and consensus was reached after discussion...
April 25, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28448270/a-new-in-vitro-spine-test-rig-to-track-multiple-vertebral-motions-under-physiological-conditions
#3
Agnes Beckmann, Christian Herren, Marion Mundt, Jan Siewe, Philipp Kobbe, Rolf Sobottke, Hans-Christoph Pape, Marcus Stoffel, Bernd Markert
In vitro pure moment spine tests are commonly used to analyse surgical implants in cadaveric models. Most of the tests are performed at room temperature. However, some new dynamic instrumentation devices and soft tissues show temperature-dependent material properties. Therefore, the aim of this study is to develop a new test rig, which allows applying pure moments on lumbar spine specimens in a vapour-filled chamber at body temperature. As no direct sight is given in the vapour-filled closed chamber, a magnetic tracking (MT) system with implantable receivers was used...
April 27, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28447881/clinical-and-duplex-ultrasound-evaluation-of-lower-extremities-varicose-veins-a-practical-guideline
#4
Luca Spinedi, Pavel Broz, Rolf Peter Engelberger, Daniel Staub, Heiko Uthoff
Lower extremities varicose veins are among the most frequent diseases in the general population. They can cause complaints with a deterioration of the quality of life and are associated with potentially threatening clinical conditions such as chronic venous ulceration, haemorrhage from ruptured varicose veins, and venous thromboembolism. An accurate diagnostic work-up is crucial to confirm the presence and the extension of the venous problem, in order to obtain an optimal management of the condition. In the past years, great efforts have been made to reach an international consensus on the terminology, the symptomatology, the classification, and the duplex ultrasound examination of lower extremities varicose veins...
April 27, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28446023/removing-biofilms-from-stainless-steel-without-changing-surface-properties-relevant-for-bacterial-attachment
#5
Katharina Huttenlochner, Christine Müller-Renno, Christiane Ziegler, Rolf Merz, Birgit Merz, Michael Kopnarski, Jonas Chodorski, Christin Schlegel, Roland Ulber
The influence of oxygen (and argon) plasma cleaning and a base-acid cleaning procedure on stainless steel surfaces was studied. The main aim was to clean stainless steel samples from Paracoccus seriniphilus biofilms without changing the surface properties which are relevant for bacterial attachment to allow reuse in a biofilm reactor. It is shown that oxygen plasma cleaning, which very successfully removes the same kind of biofilm from titanium surfaces, is not suitable for stainless steel. It largely influences the surface chemistry by producing thick metal oxide layers of varying compositions and changing phenomenological surface properties such as wettability...
April 26, 2017: Biointerphases
https://www.readbyqxmd.com/read/28444761/photon-counting-ct-for-simultaneous-imaging-of-multiple-contrast-agents-in-the-abdomen-an-in-vivo-study
#6
Rolf Symons, Bernhard Krauss, Pooyan Sahbaee, Tyler E Cork, Manu N Lakshmanan, David A Bluemke, Amir Pourmorteza
PURPOSE: To demonstrate the feasibility of spectral imaging using photon-counting detector (PCD) x-ray computed tomography (CT) for simultaneous material decomposition of 3 contrast agents in vivo in a large animal model. METHODS: This Institutional Animal Care and Use Committee-approved study used a canine model. Bismuth subsalicylate was administered orally 24-72 hours before imaging. PCD CT was performed during intravenous administration of 40-60 ml gadoterate meglumine; 3...
April 26, 2017: Medical Physics
https://www.readbyqxmd.com/read/28444356/long-term-effects-of-drought-on-tree-ring-growth-and-carbon-isotope-variability-in-scots-pine-in-a-dry-environment
#7
Galina Timofeeva, Kerstin Treydte, Harald Bugmann, Andreas Rigling, Marcus Schaub, Rolf Siegwolf, Matthias Saurer
Drought frequency is increasing in many parts of the world and may enhance tree decline and mortality. The underlying physiological mechanisms are poorly understood, however, particularly regarding chronic effects of long-term drought and the response to increasing temperature and vapor pressure deficit (VPD). We combined analyses of radial growth and stable carbon isotope ratios (δ13C) in tree rings in a mature Scots pine (Pinus sylvestris L.) forest over the 20th century to elucidate causes of tree mortality in one of the driest parts of the European Alps (Pfynwald, Switzerland)...
April 21, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28442244/automatic-high-resolution-infarct-detection-using-volumetric-multiphase-dual-energy-ct
#8
Veit Sandfort, Alan C Kwan, Comfort Elumogo, Davis M Vigneault, Rolf Symons, Amir Pourmorteza, Kelly Rice, Cynthia Davies-Venn, Mark A Ahlman, Chia-Ying Liu, Stefan L Zimmerman, David A Bluemke
OBJECTIVES: Late contrast enhancement CT (LCE-CT) visualizes the presence of myocardial infarcts. Differentiation of the contrast-enhanced infarct from blood pool is challenging. We developed a novel method using data from first pass CT angiography (CTA) imaging to enable automatic infarct detection. MATERIALS AND METHODS: A canine model of myocardial infarction was produced in 11 animals. Two months later, first pass CTA (90 kVp) and LCE-CT (dual energy 90 kVp/150 kVp tin filtered) were performed...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28440884/radical-arylation-of-anilines-and-pyrroles-via-aryldiazotates
#9
Josefa Hofmann, Eva Gans, Timothy Clark, Markus Rolf Heinrich
The radical arylation of anilines and pyrroles can be achieved under transition metal- and catalyst-free conditions using aryldiazotates in strongly alkaline aqueous solutions. The aryl diazotates act as protected diazonium ions, which do not undergo azo coupling with electron-rich aromatic substrates, but are still able to serve as sources for aryl radicals at slightly elevated temperatures. Based on an improved preparation of aryldiazotates in aqueous solution, homolytic aromatic substitutions of anilines and pyrroles can now be conducted with good overall yields and with high regio-selectivity...
April 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28440272/corrigendum-pharmacological-inhibition-of-adipose-triglyceride-lipase-corrects-high-fat-diet-induced-insulin-resistance-and-hepatosteatosis-in-mice
#10
Martina Schweiger, Matthias Romauch, Renate Schreiber, Gernot F Grabner, Sabrina Hütter, Petra Kotzbeck, Pia Benedikt, Thomas O Eichmann, Sohsuke Yamada, Oskar Knittelfelder, Clemens Diwoky, Carina Doler, Nicole Mayer, Werner De Cecco, Rolf Breinbauer, Robert Zimmermann, Rudolf Zechner
No abstract text is available yet for this article.
April 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28440041/ultrasound-assisted-versus-conventional-catheter-directed-thrombolysis-for-acute-ilio-femoral-deep-vein-thrombosis-one-year-follow-up-data-of-a-randomized-controlled-trial
#11
Rolf P Engelberger, Anna Stuck, David Spirk, Torsten Willenberg, Axel Haine, Daniel Périard, Iris Baumgartner, Nils Kucher
BACKGROUND: In patients with acute ilio-femoral deep vein thrombosis (IFDVT), catheter-directed thrombolysis (CDT) aims to prevent the post-thrombotic syndrome (PTS). Adding intravascular high-frequency, low-power ultrasound energy to CDT does not seem to improve the immediate thrombolysis results but its impact on clinical outcomes at 12 months is not known. PATIENTS/METHODS: In this randomized-controlled trial, 48 patients (mean age 50±21 years, 52% women) with acute IFDVT were randomized to conventional CDT (n=24) or ultrasound-assisted CDT (USAT; n=24)...
April 25, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28439728/is-color-an-integral-part-of-a-rich-mental-simulation
#12
Lara N Hoeben Mannaert, Katinka Dijkstra, Rolf A Zwaan
Research suggests that language comprehenders simulate visual features such as shape during language comprehension. In sentence-picture verification tasks, whenever pictures match the shape or orientation implied by the previous sentence, responses are faster than when the pictures mismatch implied visual aspects. However, mixed results have been demonstrated when the sentence-picture paradigm was applied to color (Connell, Cognition, 102(3), 476-485, 2007; Zwaan & Pecher, PLOS ONE, 7(12), e51382, 2012). One of the aims of the current investigation was to resolve this issue...
April 24, 2017: Memory & Cognition
https://www.readbyqxmd.com/read/28439713/personalized-axillary-dissection-the-number-of-excised-lymph-nodes-of-nodal-positive-breast-cancer-patients-has-no-significant-impact-on-relapse-free-and-overall-survival
#13
Florian Ebner, Achim Wöckel, Wolfgang Janni, Rolf Kreienberg, Lukas Schwentner, Manfred Wischnewsky
PURPOSE: Sentinel lymph node (SLN) biopsy has replaced axillary lymph node dissection (ALND) for the staging of clinically node-negative breast cancer patients (BCP), demonstrating equivalent survival to ALND while resulting in reduced morbidity. ALND has remained the standard of care for the majority of BCP with clinical axillary metastases or metastases found on SLN biopsy. More recently, it is debated whether ALND could be avoided not only in SLN-negative BCP but also in selected SLN-positive disease or even in all patients...
April 24, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28439242/comprehensive-psychopathological-assessment-based-on-the-association-for-methodology-and-documentation-in-psychiatry-amdp-system-development-methodological-foundation-application-in-clinical-routine-and-research
#14
REVIEW
Rolf-Dieter Stieglitz, Achim Haug, Erdmann Fähndrich, Michael Rösler, Wolfgang Trabert
The documentation of psychopathology is core to the clinical practice of the psychiatrist and clinical psychologist. However, both in initial as well as further training and specialization in their fields, this particular aspect of their work receives scanty attention only. Yet, for the past 50 years, the Association for Methodology and Documentation in Psychiatry (AMDP) System has been in existence and available as a tool to serve precisely the purpose of offering a systematic introduction to the terminology and documentation of psychopathology...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28439125/electron-phonon-coupling-in-topological-surface-states-the-role-of-polar-optical-modes
#15
Rolf Heid, Irina Yu Sklyadneva, Evgueni V Chulkov
The use of topological edge states for spintronic applications could be severely hampered by limited lifetimes due to intrinsic many-body interactions, in particular electron-phonon coupling. Previous works to determine the intrinsic coupling strength did not provide a coherent answer. Here, the electron-phonon interaction in the metallic surface state of 3D topological insulators is revised within a first principles framework. For the archetypical cases of Bi2Se3 and Bi2Te3, we find an overall weak coupling constant of less than 0...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438713/effects-of-arterial-input-function-selection-on-kinetic-parameters-in-brain-dynamic-contrast-enhanced-mri
#16
Vera C Keil, Burkhard Mädler, Jürgen Gieseke, Rolf Fimmers, Elke Hattingen, Hans H Schild, Dariusch R Hadizadeh
PURPOSE: Kinetic parameters derived from dynamic contrast-enhanced MRI (DCE-MRI) were suggested as a possible instrument for multi-parametric lesion characterization, but have not found their way into clinical practice yet due to inconsistent results. The quantification is heavily influenced by the definition of an appropriate arterial input functions (AIF). Regarding brain tumor DCE-MRI, there are currently several co-existing methods to determine the AIF frequently including different brain vessels as sources...
April 21, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28437835/pten-downregulation-promotes-%C3%AE-oxidation-to-fuel-hypertrophic-liver-growth-after-hepatectomy-in-mice
#17
Ekaterina Kachaylo, Christoph Tschuor, Nicolas Calo, Nathalie Borgeaud, Perparim Limani, Anne-Christine Piguet, Jean-Francois Dufour, Michelangelo Foti, Rolf Graf, Pierre A Clavien, Bostjan Humar
In regenerating liver, hepatocytes accumulate lipids before the major wave of parenchymal growth. This transient, regeneration-associated steatosis (TRAS) is required for liver recovery, but its purpose is unclear. The tumor suppressor PTEN is a key inhibitor of the AKT-mTOR axis that regulates growth and metabolic adaptations after hepatectomy. In quiescent liver, PTEN causes pathological steatosis when lost, while its role in regenerating liver remains unknown. Here, we show that PTEN downregulation promotes liver growth in a TRAS-dependent way...
April 24, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28437795/effect-of-using-the-heart-score-in-patients-with-chest-pain-in-the-emergency-department-a-stepped-wedge-cluster-randomized-trial
#18
Judith M Poldervaart, Johannes B Reitsma, Barbra E Backus, Hendrik Koffijberg, Rolf F Veldkamp, Monique E Ten Haaf, Yolande Appelman, Herman F J Mannaerts, Jan-Melle van Dantzig, Madelon van den Heuvel, Mohamed El Farissi, Bernard J W M Rensing, Nicolette M S K J Ernst, Ineke M C Dekker, Frank R den Hartog, Thomas Oosterhof, Ghizelda R Lagerweij, Eugene M Buijs, Maarten W J van Hessen, Marcel A J Landman, Roland R J van Kimmenade, Luc Cozijnsen, Jeroen J J Bucx, Clara E E van Ofwegen-Hanekamp, Maarten-Jan Cramer, A Jacob Six, Pieter A Doevendans, Arno W Hoes
Background: The HEART (History, Electrocardiogram, Age, Risk factors, and initial Troponin) score is an easy-to-apply instrument to stratify patients with chest pain according to their short-term risk for major adverse cardiac events (MACEs), but its effect on daily practice is unknown. Objective: To measure the effect of use of the HEART score on patient outcomes and use of health care resources. Design: Stepped-wedge, cluster randomized trial...
April 25, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28437030/selective-nucleation-of-gaas-on-si-nanofacets
#19
Ivan Prieto, Roksolana Kozak, Oliver Skibitzki, Marta D Rossell, Thomas Schroeder, Rolf Erni, Hans von Känel
The early growth stage of GaAs by metal organic vapor phase epitaxy on a novel kind of Si substrate is investigated. The substrate consists of nanotips (NTs) fabricated on a Si(001) wafer by means of lithography and reactive ion etching. 3D GaAs nanocrystals are found to nucleate with a probability of 90% on the (n0m), (-n0m), (0nm), and (0-nm) facets (n, m integers) of these NTs. Additionally, in terms of nucleation yield, an average of 2 GaAs nanocrystals in each of those facets is observed. By contrast, facets of type {±nnm} remain virtually free of any 3D nuclei...
April 24, 2017: Small
https://www.readbyqxmd.com/read/28436078/oxygen-isotope-fractionations-across-individual-leaf-carbohydrates-in-grass-and-tree-species
#20
Marco M Lehmann, Bruno Gamarra, Ansgar Kahmen, Rolf T W Siegwolf, Matthias Saurer
Almost no δ(18) O data are available for leaf carbohydrates, leaving a gap in the understanding of the δ(18) O relationship between leaf water and cellulose. We measured δ(18) O values of bulk leaf water (δ(18) OLW ) and individual leaf carbohydrates (e.g. fructose, glucose, sucrose) in grass and tree species, and δ(18) O of leaf cellulose in grasses. The grasses were grown under two relative humidity (rH) conditions. Sucrose was generally (18) O-enriched compared to hexoses across all species with an apparent biosynthetic fractionation factor (εbio ) of more than 27‰ relative to δ(18) OLW , which might be explained by isotopic leaf water and sucrose synthesis gradients...
April 23, 2017: Plant, Cell & Environment
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