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https://www.readbyqxmd.com/read/28651276/white-paper-interventional-mri-current-status-and-potential-for-development-considering-economic-perspectives-part-1-general-application
#1
Jörg Barkhausen, Thomas Kahn, Gabriele A Krombach, Christiane K Kuhl, Joachim Lotz, David Maintz, Jens Ricke, Stefan O Schönberg, Thomas J Vogl, Frank K Wacker
Background MRI is attractive for the guiding and monitoring of interventional procedures due to its high intrinsic soft tissue contrast and the possibility to measure physiologic parameters like flow and cardiac function. Method The current status of interventional MRI for the clinical routine was analyzed. Results The effort needed for the development of MR-safe monitoring systems and instruments initially resulted in the application of interventional MRI only for procedures that could not be performed by other means...
July 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28650912/the-effect-of-vasodilator-%C3%AE-blockers-on-renal-function-in-hypertensive-patients
#2
Lawrence H Kwon, Karan Wats, Clive Rosendorff
BACKGROUND: Not only is there a limited number of studies on the effects of vasodilator β-blocker (VBB) therapy on kidney function - specifically, glomerular filtration rate (GFR), serum creatinine (sCr) and proteinuria - but of those that have been reported, the results are mixed. This meta-analysis seeks to assess the efficacy of VBBs on selected renal parameters in hypertensive patients. METHODS: We conducted a meta-analysis of any prospective trial that provided both baseline and follow-up of at least 4 weeks of VBB therapy - carvedilol, labetalol, dilevalol, nebivolol and celiprolol in patients with hypertension...
June 24, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28650639/on-site-determination-and-monitoring-of-real-time-fluence-delivery-for-an-operating-uv-reactor-based-on-a-true-fluence-rate-detector
#3
Mengkai Li, Wentao Li, Zhimin Qiang, Ernest R Blatchley
At present, on-site fluence (distribution) determination and monitoring of an operating UV system represents a considerable challenge. The recently developed micro-fluorescent silica detector (MFSD) is able to measure the approximate true fluence rate (FR) at a fixed position in a UV reactor that can be compared with a FR model directly. Hence it has provided a connection between model calculation and real-time fluence determination. In this study, an on-site determination and monitoring method of fluence delivery for an operating UV reactor was developed...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28650087/educational-strategies-and-art-effect-on-salivary-characteristics-a-controlled-clinical-trial
#4
Camila Nobre de Freitas, Paula Midori Castelo, Karina Guedes de Sousa, Gabriela Caroline Alonso, Fernando Luiz Affonso Fonseca, Marlise Inês Klein, Taís de Souza Barbosa
OBJECTIVE: To evaluate educational strategies and ART-restoration impact on salivary physicochemical and microbiological characteristics. DESIGN: Two groups of 6-7-yr-old children were included: GART , with at least one decayed primary molar (n=36), submitted to 4 sessions of oral health educational strategy (OHES) and ART-restoration; GC , a paired caries-free group (n=36), submitted to 4 sessions of OHES. Three evaluations were carried out: baseline, one week after OHES and one month after OHES or ART, when biofilm and gingivitis frequencies, salivary flow, pH, buffer capacity, calcium and phosphorus concentrations were assessed...
June 26, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28649788/pharmacokinetics-and-dynamics-of-mycophenolate-mofetil-after-single-dose-oral-administration-in-juvenile-dachshunds
#5
M Grobman, D M Boothe, H Rindt, B G Williamson, M L Katz, J R Coates, C R Reinero
Mycophenolate mofetil (MMF) is recommended as an alternative/complementary immunosuppressant. Pharmacokinetic and dynamic effects of MMF are unknown in young-aged dogs. We investigated the pharmacokinetics and pharmacodynamics of single oral dose MMF metabolite, mycophenolic acid (MPA), in healthy juvenile dogs purpose-bred for the tripeptidyl peptidase 1 gene (TPP1) mutation. The dogs were heterozygous for the mutation (nonaffected carriers). Six dogs received 13 mg/kg oral MMF and two placebo. Pharmacokinetic parameters derived from plasma MPA were evaluated...
June 25, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28649141/the-impact-of-lake-and-reservoir-parameterization-on-global-streamflow-simulation
#6
Zuzanna Zajac, Beatriz Revilla-Romero, Peter Salamon, Peter Burek, Feyera A Hirpa, Hylke Beck
Lakes and reservoirs affect the timing and magnitude of streamflow, and are therefore essential hydrological model components, especially in the context of global flood forecasting. However, the parameterization of lake and reservoir routines on a global scale is subject to considerable uncertainty due to lack of information on lake hydrographic characteristics and reservoir operating rules. In this study we estimated the effect of lakes and reservoirs on global daily streamflow simulations of a spatially-distributed LISFLOOD hydrological model...
May 2017: Journal of Hydrology
https://www.readbyqxmd.com/read/28649028/the-optimization-and-establishment-of-quechers-uplc-ms-ms-method-for-simultaneously-detecting-various-kinds-of-pesticides-residues-in-fruits-and-vegetables
#7
REVIEW
Zhan Xiu-Ping, Ma Lin, Huang Lan-Qi, Chen Jian-Bo, Zhao Li
OBJECTIVES: The quality safety supervision and test of agricultural products urgently need a very excellent analytical method with simultaneously detecting many components in order to assess, prevent and control pesticide residues. METHODS: In this research, three fruits and three vegetables produced in Shanghai were selected as the materials, 54 pesticide residues were detected with the ultra-high performance liquid chromatography-tandem mass spectrometric (UPLC-MS/MS) method on the basis of optimized QuEChERS method according to different materials properties...
June 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28648880/animated-versus-non-animated-biofeedback-therapy-for-dysfunctional-voiding-treatment-does-it-change-the-outcome
#8
Tayfun Oktar, M İrfan Dönmez, Ünsal Özkuvancı, Haluk Ander, Orhan Ziylan
PURPOSE: The aim of this study is to evaluate and compare the effectiveness of animated vs. non-animated biofeedback therapy in the treatment of dysfunctional voiding (DV) in the pediatric age group. METHODS: In this study, children with DV were randomly assigned for animated and non-animated biofeedback therapy. Age, voiding dysfunction symptom scores (VDSS), urinary ultrasound and uroflowmetry parameters such as electromyography (EMG) activity, voided volumes, post voiding residual urine volume (PVR) and maximum flow rate (Qmax) were evaluated...
June 8, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28648837/integrative-characterization-of-chronic-cigarette-smoke-induced-cardiopulmonary-comorbidities-in-a-mouse-model
#9
Ágnes Kemény, Kata Csekő, István Szitter, Zoltán V Varga, Péter Bencsik, Krisztina Kiss, Róbert Halmosi, László Deres, Krisztián Erős, Anikó Perkecz, László Kereskai, Terézia László, Tamás Kiss, Péter Ferdinandy, Zsuzsanna Helyes
Cigarette smoke-triggered inflammatory cascades and consequent tissue damage are the main causes of chronic obstructive pulmonary disease (COPD). There is no effective therapy and the key mediators of COPD are not identified due to the lack of translational animal models with complex characterization. This integrative chronic study investigated cardiopulmonary pathophysiological alterations and mechanisms with functional, morphological and biochemical techniques in a 6-month-long cigarette smoke exposure mouse model...
June 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28648804/the-single-igf-1-partial-deficiency-is-responsible-for-mitochondrial-dysfunction-and-is-restored-by-igf-1-replacement-therapy
#10
M Olleros Santos-Ruiz, M C Sádaba, I Martín-Estal, U Muñoz, C Sebal Neira, I Castilla-Cortázar
BACKGROUND & AIMS: We previously described in cirrhosis and aging, both conditions of IGF-1 deficiency, a clear hepatic mitochondrial dysfunction with increased oxidative damage. In both conditions, the hepatic mitochondrial function was improved with low doses of IGF-1. The aim of this work was to explore if the only mere IGF-1 partial deficiency, without any exogenous insult, is responsible for hepatic mitochondrial dysfunction. METHODS: Heterozygous (igf1(+/-)) mice were divided into two groups: untreated and treated mice with low doses of IGF-1...
June 2, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28648774/the-carmat-bioprosthetic-total-artificial-heart-is-associated-with-early-hemostatic-recovery-and-no-acquired-von-willebrand-syndrome-in-calves
#11
David M Smadja, Sophie Susen, Antoine Rauch, Bernard Cholley, Christian Latrémouille, Daniel Duveau, Luca Zilberstein, Denis Méléard, Marie-Fazia Boughenou, Eric Van Belle, Pascale Gaussem, Antoine Capel, Piet Jansen, Alain Carpentier
OBJECTIVES: To determine hemostasis perturbations, including von Willebrand factor (VWF) multimers, after implantation of a new bioprosthetic and pulsatile total artificial heart (TAH). DESIGN: Preclinical study SETTING: Single-center biosurgical research laboratory. PARTICIPANTS: Female Charolais calves, 2-to-6 months old, weighing 102-to-122 kg. INTERVENTIONS: Surgical implantation of TAH through a mid-sternotomy approach...
March 1, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28648652/dialysis-related-parameters-influence-remodeling-in-the-venous-part-of-the-native-arteriovenous-fistula
#12
Tomasz Gołębiowski, Mariusz Kusztal, Krzysztof Letachowicz, Hanna Augustyniak-Bartosik, Maciej Szymczak, Magdalena Krajewska, Wojciech Marcinkowski, Wacław Weyde, Marian Klinger
AIM: The aim of this study was to evaluate the association of hemodynamic parameters related to hemodialysis and antropometric parameters of patients with changes in the venous part of the arteriovenous fistula (AVF) at points of needling. MATERIAL AND METHODS: 242 HD patients (60.3% men), with median age 65 [IQR 56-75] years, on HD treatment for a median of 49 [IQR 20-88] months with functioning fistula were recruited to the study. The history of vascular access, comorbidity, antropometric (BMI, BSA, body composition) and dialysis-related parameters were analyzed...
June 22, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28648066/effects-of-topography-related-puff-parameters-on-carbonyl-delivery-in-mainstream-cigarette-smoke
#13
Samantha M Reilly, Reema Goel, Zachary T Bitzer, Ryan J Elias, Jonathan Foulds, Joshua Muscat, John P Richie
Smoking topography parameters differ substantially between individual smokers and may lead to significant variation in tobacco smoke exposure and risk for tobacco-caused diseases. However, to date, little is known regarding the impact of individual puff parameters on the delivery of many harmful smoke constituents including carbonyls. To examine this, we determined the effect of altering individual puff parameters on mainstream smoke carbonyl levels in machine-smoked reference cigarettes. Carbonyls including formaldehyde, acetaldehyde, crotonaldehyde, propionaldehyde, methyl ethyl ketone (MEK), acrolein and acetone, were determined in cigarette smoke by HPLC after derivatization with 2,4-dinitrophenylhydrazine (DNPH)...
June 24, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28648016/-mechanisms-of-cytoskeleton-and-pi3k%C3%AE-rhoa-in-fine-particulate-matter-deteriorating-phagocytosis-defect-of-alveolar-macrophage-in-mice-with-chronic-obstructive-pulmonary-disease
#14
Q Xia, S T Hu, X L Zeng, H R Bao, X J Liu
Objective: To explore the mechanism of cytoskeleton and PI3Kδ-RhoA in fine particulate matter deteriorating phagocytosis defect of alveolar macrophage (AM) in chronic obstructive pulmonary disease (COPD) mice. Methods: Forty mice were randomly divided into four groups: health control group, COPD group, health PM2.5 group, COPD PM2.5 group and with ten in each group. A mouse model of COPD was established by cigarette smoke exposure, and health PM2.5 group and COPD PM2.5 group mice were given PM2.5 (588 μg/m(3)) aerosol inhalation for 90 days...
June 27, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28647260/numerical-simulation-of-flow-hydrodynamics-of-struvite-pellets-in-a-liquid-solid-fluidized-bed
#15
Xin Ye, Dongyuan Chu, Yaoyin Lou, Zhi-Long Ye, Ming Kuang Wang, Shaohua Chen
Phosphorus recovery in the form of struvite has been aroused in recent decades for its dual advantages in eutrophication control and resource protection. The usage of the struvite products is normally determined by the size which is largely depended on the hydrodynamics. In this study, flow behavior of struvite pellets was simulated by means of Eulerian-Eulerian two-fluid model combining with kinetic theory of granular flow in a liquid-solid fluidized bed reactor (FBR). A parametric study including the mesh size, time step, discretization strategy, turbulent model and drag model was first developed, followed by the evaluations of crucial operational conditions, particle characteristics and reactor shapes...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647197/characterizing-tissue-perfusion-after-lower-extremity-intervention-using-two-dimensional-color-coded-digital-subtraction-angiography
#16
Ann H Kim, Andrew J Shevitz, Katherine L Morrow, Daniel E Kendrick, Karem Harth, Henry Baele, Vikram S Kashyap
OBJECTIVE: Digital subtraction angiography (DSA) of the peripheral arterial vasculature provides lumenographic information but only a qualitative assessment of blood flow. The ability to quantify adequate tissue perfusion of the lower extremities would enable real-time perfusion assessment during DSA of patients with peripheral arterial disease (PAD). In this study, we used a novel real-time imaging software to delineate tissue perfusion parameters in the foot in PAD patients. METHODS: Between March 2015 and June 2016, patients (N = 31) underwent lower extremity angiography using a two-dimensional perfusion (2DP) imaging protocol (Philips Healthcare, Andover, Mass)...
June 21, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28647145/a-new-peak-shape-analysis-approach-detection-and-quantitation-of-concurrent-fronting-tailing-and-their-effect-on-asymmetry-measurements
#17
M Farooq Wahab, Darshan C Patel, Daniel W Armstrong
Most peak shapes obtained in separation science depart from linearity for various reasons such as thermodynamic, kinetic, or flow based effects. An indication of the nature of asymmetry often helps in problem solving e.g. in column overloading, slurry packing, buffer mismatch, and extra-column band broadening. However, existing tests for symmetry/asymmetry only indicate the skewness in excess (tail or front) and not the presence of both. Two simple graphical approaches are presented to analyze peak shapes typically observed in gas, liquid, and supercritical fluid chromatography as well as capillary electrophoresis...
June 13, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28646647/successful-maintenance-of-key-physiological-parameters-in-preterm-lambs-treated-with-ex%C3%A2-vivo-uterine-environment-therapy-for-a-period-of-1-week
#18
Haruo Usuda, Shimpei Watanabe, Yuichiro Miura, Masatoshi Saito, Gabrielle C Musk, Judith Rittenschober-Böhm, Hideyuki Ikeda, Shinichi Sato, Takushi Hanita, Tadashi Matsuda, Alan H Jobe, John P Newnham, Sarah J Stock, Matthew W Kemp
BACKGROUND: Extremely preterm infants born at the border of viability (22-24 weeks' gestation) have high rates of death and lasting disability. Ex vivo uterine environment therapy is an experimental neonatal intensive care strategy that provides gas exchange using parallel membranous oxygenators connected to the umbilical vessels, sparing the extremely preterm cardiopulmonary system from ventilation-derived injury. OBJECTIVE: In this study, we aimed to refine our ex vivo uterine environment therapy platform to eliminate fetal infection and inflammation, while simultaneously extending the duration of hemodynamically stable ex vivo uterine environment therapy to 1 week...
June 20, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28646626/sexual-dimorphism-in-umbilical-vein-blood-flow-during-the-second-half-of-pregnancy-a-longitudinal-study
#19
Christian Widnes, Kari Flo, Tom Wilsgaard, Anthony O Odibo, Ganesh Acharya
OBJECTIVES: To investigate gestational age-specific serial changes in umbilical vein (UV) volume blood flow during the second half of normal pregnancy and establish sex-specific reference ranges. METHODS: This work was a prospective longitudinal study of singleton low-risk pregnancies. The UV diameter and maximum blood flow velocity were serially measured by sonography at the intra-abdominal portion of the UV over 19 to 41 weeks. Umbilical vein volume blood flow was calculated and normalized for estimated fetal weight...
June 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28646215/single-molecule-and-multiple-bond-characterization-of-catch-bond-associated-cytoadhesion-in-malaria
#20
Ying Bena Lim, Juzar Thingna, Jianshu Cao, Chwee Teck Lim
The adhesion of malaria infected red blood cells (iRBCs) to host endothelial receptors in the microvasculature, or cytoadhesion, is associated with severe disease pathology such as multiple organ failure and cerebral malaria. Malaria iRBCs have been shown to bind to several receptors, of which intercellular adhesion molecule 1 (ICAM-1) upregulation in brain microvasculature is the only one correlated to cerebral malaria. We utilize a biophysical approach to study the interactions between iRBCs and ICAM-1. At the single molecule level, force spectroscopy experiments reveal that ICAM-1 forms catch bond interactions with Plasmodium falciparum parasite iRBCs...
June 23, 2017: Scientific Reports
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