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https://www.readbyqxmd.com/read/28441646/spontaneous-regression-of-possible-transcatheter-aortic-valve-thrombosis-without-additional-anticoagulant-two-year-follow-up
#1
Ryo Yanagisawa, Kentaro Hayashida, Masahiro Jinzaki, Keiichi Fukuda
An 84-year-old man with symptomatic severe aortic stenosis received transcatheter aortic valve implantation (TAVI). Dual-antiplatelet therapy was continued for 6 months post TAVI, and aspirin alone was used thereafter. Four-dimensional multidetector computed tomography revealed a new hypoattenuated leaflet thickening (HALT) with reduced leaflet motion at 1 year, considered to indicate leaflet thrombosis. At the 2-year follow-up, leaflet mobility had improved, with spontaneous regression of HALT. This is the first report of confirmed spontaneous regression of possible transcatheter heart valve thrombosis and recovery of leaflet mobility without the need for additional anticoagulant...
May 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28437353/evaluation-of-the-modern-luque-trolley-construct-for-the-treatment-of-early-onset-scoliosis-using-a-gliding-implant-in-an-immature-animal-model
#2
Jean A Ouellet, Catherine E Ferland, Karina Klein, Guillaume Racloz, Karina Klein, Henning Richter, Thomas Steffen, Brigitte von Rechenberg
STUDY DESIGN: This was an experimental animal study. OBJECTIVE: To determine biological compatibility, stability, and growth potential of the Trolley Gliding Vehicle (TGV) used in a novel surgical technique for guided spinal growth. SUMMARY OF BACKGROUND DATA: Current treatments for early-onset scoliosis maintaining spinal growth consist of posteriorly based spinal constructs requiring repetitive lengthening. Such interventions have a high rate of complications...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28431360/contrasting-dual-c-cl-isotope-fractionation-offers-potential-to-distinguish-reductive-chloroethene-transformation-from-breakdown-by-permanganate
#3
Eylem Doğan-Subaşı, Martin Elsner, Shiran Qiu, Stefan Cretnik, Siavash Atashgahi, Orfan Shouakar-Stash, Nico Boon, Winnie Dejonghe, Leen Bastiaens
cis-1,2-Dichloroethene (cis-DCE) and trichloroethene (TCE) are persistent, toxic and mobile pollutants in groundwater systems. They are both conducive to reductive dehalogenation and to oxidation by permanganate. In this study, the potential of dual element (C, Cl) compound specific isotope analyses (CSIA) for distinguishing between chemical oxidation and anaerobic reductive dechlorination of cis-DCE and TCE was investigated. Well-controlled cis-DCE degradation batch tests gave similar carbon isotope enrichment factors εC (‰), but starkly contrasting dual element isotope slopes Δδ(13)C/Δδ(37)Cl for permanganate oxidation (εC=-26‰±6‰, Δδ(13)C/Δδ(37)Cl≈-125±47) compared to reductive dechlorination (εC=-18‰±4‰, Δδ(13)C/Δδ(37)Cl≈4...
April 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28427334/the-impact-of-the-mode-of-survey-administration-on-estimates-of-daily-smoking-for-mobile-phone-only-users
#4
Joseph Hanna, Damien V Cordery, David G Steel, Walter Davis, Timothy C Harrold
BACKGROUND: Over the past decade, there have been substantial changes in landline and mobile phone ownership, with a substantial increase in the proportion of mobile-only households. Estimates of daily smoking rates for the mobile phone only (MPO) population have been found to be substantially higher than the rest of the population and telephone surveys that use a dual sampling frame (landline and mobile phones) are now considered best practice. Smoking is seen as an undesirable behaviour; measuring such behaviours using an interviewer may lead to lower estimates when using telephone based surveys compared to self-administered approaches...
April 20, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28418013/a-graphene-based-frequency-quadrupler
#5
Chuantong Cheng, Beiju Huang, Xurui Mao, Zanyun Zhang, Zan Zhang, Zhaoxin Geng, Ping Xue, Hongda Chen
Benefit from exceptional electrical transport properties, graphene receives worldwide attentions, especially in the domain of high frequency electronics. Due to absence of effective bandgap causing off-state the device, graphene material is extraordinarily suitable for analog circuits rather than digital applications. With this unique ambipolar behavior, graphene can be exploited and utilized to achieve high performance for frequency multipliers. Here, dual-gated graphene field-effect transistors have been firstly used to achieve frequency quadrupling...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28413142/outcomes-of-modular-dual-mobility-acetabular-components-in-revision-total-hip-arthroplasty
#6
E Grant Sutter, Taylor R McClellan, David E Attarian, Michael P Bolognesi, Paul F Lachiewicz, Samuel S Wellman
BACKGROUND: There is a high rate of dislocation after revision total hip arthroplasty. This study evaluated the outcomes of 1 modular dual mobility component in revision total hip arthroplasty in patients at high risk of dislocation. METHODS: We reviewed 64 revisions performed in 27 (42%) patients for recurrent dislocation, 16 (25%) for adverse local tissue reaction, 11 (17%) for reimplantation infection, and 10 (16%) for aseptic loosening, malposition, or fracture...
March 23, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28407962/evaluation-of-bioactive-flavonoids-and-antioxidant-activity-in-pericarpium-citri-reticulatae-citrus-reticulata-chachi-during-storage
#7
Manqin Fu, Yujuan Xu, Yulong Chen, Jijun Wu, Yuanshan Yu, Bo Zou, Kejing An, Gengsheng Xiao
A simple and accurate method using high performance liquid chromatography (HPLC) with dual wavelength detection was developed to simultaneously determine the contents of one flavanone glycoside (hesperidin) and five polymethoxylated flavones (PMFs: sinensetin, 4',5,7,8-tetramethoxyflavone, nobiletin, tangeretin and 5-O-desmethyl nobiletin) in Pericarpium Citri Reticulatae (Citrus reticulata 'Chachi') ('Chachi' PCR). By modifying the mobile phase compositions and detection wavelengths, an optimal HPLC condition was obtained, under which the calibration curves of all six compounds exhibited good linearity (R(2)>0...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28406514/toward-artifact-free-data-in-hadamard-transform-based-double-multiplexing-of-ion-mobility-orbitrap-mass-spectrometry
#8
Meghasyam Tummalacherla, Sandilya V B Garimella, Spencer A Prost, Yehia M Ibrahim
The integration of ion mobility spectrometry (IMS) with a trap-based mass spectrometer (MS) such as Orbitrap using the dual gate approach suffers from low duty cycle. Efforts to improve the duty cycle involve the utilization of Hadamard transform-based double multiplexing which significantly improves the signal-to-noise ratio and duty cycle of the ion mobility-Orbitrap mass spectrometry (IM-Orbitrap MS) platform. However, artifacts and noise in the demultiplexed data significantly reduce the data quality and negate the benefits of multiplexing...
April 13, 2017: Analyst
https://www.readbyqxmd.com/read/28396802/a-portable-inexpensive-nonmydriatic-fundus-camera-based-on-the-raspberry-pi%C3%A2-computer
#9
Bailey Y Shen, Shizuo Mukai
Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter condensing lens...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28395391/dual-mobility-acetabular-cups-in-primary-total-hip-arthroplasty-in-patients-at-high-risk-for-dislocation
#10
Steven F Harwin, Jaydev B Mistry, Morad Chughtai, Anton Khlopas, Chukwuweike Gwam, Jared M Newman, Carlos A Higuera, Peter M Bonutti, Arthur L Malkani, Frank R Kolisek, Ronald E Delanois, Michael A Mont
INTRODUCTION: Postoperative dislocation occurs in approximately 2% of primary total hip arthroplasties (THAs). Risk factors associated with dislocation include: age of 70 years or older, body mass index (BMI) of 30 kg/m2 or greater, alcohol abuse, and neuro-degenerative diseases such as multiple sclerosis or Parkinson's disease. As a result, dual-mobility articulations, which have been typically used for revision procedures, have become an increasingly popular option for these "at risk" primary THAs...
April 11, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28395363/natural-products-as-lead-compounds-for-sodium-glucose-cotransporter-sglt-inhibitors
#11
Wolfgang Blaschek
Glucose homeostasis is maintained by antagonistic hormones such as insulin and glucagon as well as by regulation of glucose absorption, gluconeogenesis, biosynthesis and mobilization of glycogen, glucose consumption in all tissues and glomerular filtration, and reabsorption of glucose in the kidneys. Glucose enters or leaves cells mainly with the help of two membrane integrated transporters belonging either to the family of facilitative glucose transporters (GLUTs) or to the family of sodium glucose cotransporters (SGLTs)...
April 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28394083/bone-volume-to-total-volume-ratio-measured-in-trabecular-bone-by-single-sided-nmr-devices
#12
Leonardo Brizi, Marco Barbieri, Fabio Baruffaldi, Villiam Bortolotti, Chiara Fersini, Huabing Liu, Marcel Nogueira d'Eurydice, Sergei Obruchkov, Fangrong Zong, Petrik Galvosas, Paola Fantazzini
PURPOSE: Reduced bone strength is associated with a loss of bone mass, usually evaluated by dual-energy X-ray absorptiometry, although it is known that the bone microstructure also affects the bone strength. Here, a method is proposed to measure (in laboratory) the bone volume-to-total volume ratio by single-sided NMR scanners, which is related to the microstructure of the trabecular bone. METHODS: Three single-sided scanners were used on animal bone samples. These low-field, mobile, low-cost devices are able to detect the NMR signal, regardless of the sample sizes, without the use of ionizing radiations, with the further advantage of signal localization offered by their intrinsic magnetic field gradients...
April 10, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28393600/shell-design-and-reaming-technique-affect-deformation-in-mobile-bearing-total-hip-arthroplasty-acetabular-components
#13
Scott R Small, John B Meding, Jordan W Oja, Katherine S Lakstins, Danielle J Gehron, Renee D Rogge, Christine A Buckley
Press-fit acetabular components are susceptible to rim deformation. The inherent variability within acetabular reaming techniques may generate increased press-fit and, subsequently, additional component deformation. The purpose of this study was to analyze the insertion and deformation characteristics of acetabular components designed for dual-mobility systems based on component design, size, and reaming technique. Shell deformation was quantified in a validated worst-case scenario foam pinch model. Thin-walled, one-piece, and modular dual-mobility shells of varying size were implanted in under- and over-reamed cavities with insertion force measured and shell deformation assessed using digital image correlation...
April 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28391199/automatic-human-movement-assessment-with-switching-linear-dynamic-system-motion-segmentation-and-motor-performance
#14
Roberto de Souza Baptista, Antonio Padilha Lanari Bo, Mitsuhiro Hayashibe
Performance assessment of human movement is critical in diagnosis and motor-control rehabilitation. Recent developments in portable sensor technology enable clinicians to measure spatiotemporal aspects to aid in the neurological assessment. However the extraction of quantitative information from such measurements is usually done manually through visual inspection. This paper presents a novel framework for automatic human movement assessment that executes segmentation and motor performance parameter extraction in time-series of measurements from a sequence of human movements...
July 14, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28390482/recent-advances-in-stationary-phases-and-understanding-of-retention-in-hydrophilic-interaction-chromatography-a-review
#15
Pavel Jandera, Petr Janás
Hydrophilic interaction chromatography (HILIC) is a rapidly developing liquid chromatography mode suitable for separation of strongly or moderately polar samples on polar columns in highly organic mixed mobile phases. In the past five years many new types of columns appeared based on silica gel, organic polymers and other types of supports. The present work reviews the new additions to their family. Further, the progress in the understanding of theoretical principles of the HILIC mode, especially of the role of the mobile phase, and of the adsorbed water are addressed...
May 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28387852/a-daily-diary-study-of-joint-quit-attempts-by-dual-smoker-couples-the-role-of-received-and-provided-social-support
#16
Janina Lüscher, Gertraud Stadler, Urte Scholz
Introduction: Smoking individuals often have a romantic partner who also smokes. Social support from a partner is assumed to be beneficial for successful smoking cessation. To date, no study has examined daily support and smoking in dual-smoker couples jointly attempting to quit. The aim was to test the hypothesis that smokers cut down more on days with higher received and provided emotional and instrumental support. Men are expected to benefit more from support provision of their female partners than vice versa...
April 6, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28376397/a-smartphone-imaging-based-label-free-and-dual-wavelength-fluorescent-biosensor-with-high-sensitivity-and-accuracy
#17
Won-Il Lee, Sajal Shrivastava, Le-Thai Duy, Bo Yeong Kim, Young-Min Son, Nae-Eung Lee
The accuracy of a bioassay based on smartphone-integrated fluorescent biosensors has been limited due to the occurrence of false signals from non-specific reactions as well as a high background and low signal-to-noise ratios for complementary metal oxide semiconductor image sensors. To overcome this problem, we demonstrate dual-wavelength fluorescent detection of biomolecules with high accuracy. Fluorescent intensity can be quantified using dual wavelengths simultaneously, where one decreases and the other increases, as the target analytes bind to the split capture and detection aptamer probes...
March 30, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28376227/simple-and-highly-sensitive-uplc-esi-ms-ms-assay-for-rapid-determination-of-suvorexant-in-plasma
#18
Muzaffar Iqbal, Essam Ezzeldin, Nasr Y Khalil, Sara T A Al-Rashood, Khalid A Al-Rashood
Suvorexant is a dual orexin receptor antagonist, recently approved by USFDA for the treatment of insomnia. It is drug-of-abuse and listed in Schedule IV drug of the Controlled Substances Act. In this study, a simple and highly sensitive UPLC-MS/MS assay was developed and fully validated for the determination of suvorexant in rat plasma. Both suvorexant and internal standard (rivaroxaban; IS) were separated on Aquity BEHTM C18 column after the extraction form plasma using diethyl ether as extracting agent. An isocratic mobile phase, consisting of acetonitrile and 10 mM ammonium acetate in composition ratio of 85:15 was eluted at flow rate of 0...
March 1, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28372083/multibody-dynamics-in-acoustophoresis
#19
Thierry Baasch, Ivo Leibacher, Jürg Dual
Determining the trajectories of multiple acoustically and hydrodynamically interacting as well as colliding particles is one of the challenges in numerical acoustophoresis. Although the acoustic forces between multiple small spherical particles can be obtained analytically, previous research did not address the particle-particle contacts in a rigorous way. This article extends existing methods by presenting an algorithm on displacement level which models the hard contacts using set-valued force laws, hence allowing for the first time the computation of a first approximation of complete trajectories of multiple hydrodynamically and acoustically interacting particles...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28367119/computerized-dual-task-testing-of-gait-and-visuospatial-cognitive-functions-test-retest-reliability-and-validity
#20
Tony J Szturm, Vedant S Sakhalkar, Anuprita Kanitkar, Mayur Nankar
The common occurrence of age decline in mobility and cognition does cause a decrease in the level of physical activity and an increased falls risk. Consequently, dual -task (DT) assessment that simultaneously addresses both mobility skills and cognitive functions are important because, continued difficulties and fall injuries will have a sizable impact in this population. The first objective of the present study was to assess test-retest reliability of a computerized DT treadmill walking protocol and concurrent outcome measures of gait and visuospatial executive function in a group of healthy older adults...
2017: Frontiers in Human Neuroscience
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