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https://www.readbyqxmd.com/read/29352699/computed-tomography-ct-assessment-of-the-membranous-septal-anatomy-prior-to-transcatheter-aortic-valve-replacement-tavr-with-the-balloon-expandable-sapien-3-valve
#1
Brett A Oestreich, Mackenzie Mbai, Sergey Gurevich, Prabhjot S Nijjar, Selcuk Adabag, Stefan Bertog, Rosemary Kelly, Santiago Garcia
OBJECTIVES: The lower limit of the membranous septum (MS) is considered an anatomic landmark for the emergence of the Bundle of His into the left ventricle. Computed tomography (CT) assessment of MS anatomy may provide useful information about the risk of conduction abnormalities following transcatheter aortic valve replacement (TAVR). METHODS AND RESULTS: The study included 102 consecutive patients undergoing TAVR with the Edwards Sapien 3 (S3) valve. Using pre-TAVR CT and post-procedure angiography we evaluated for the presence of calcium in the left ventricular outflow tract (LVOT), calcium depth (CD), implantation depth (ID) and MS length...
December 27, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29352695/truly-anatomic-coracoclavicular-ligament-reconstruction-with-2-endobutton-devices-for-acute-rockwood-type-v-acromioclavicular-joint-dislocations
#2
Cheng Xue, Li-Jun Song, Hao Zhang, Guo-Long Tang, Xiang Li, Jia-Hu Fang
BACKGROUND: Truly anatomic coracoclavicular ligament reconstruction (TACCR) according to the original insertions is a creative new method for the treatment of severe acromioclavicular separation. This research analyzed the clinical and radiologic results of TACCR in 25 patients with at least 2-year follow-up. METHODS: The study enrolled 25 patients with Rockwood type V acromioclavicular joint dislocations who underwent TACCR using 2 Endobutton (Smith & Nephew Inc...
January 15, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29352684/long-term-outcome-of-hip-arthroplasty-in-the-setting-of-pigmented-villonodular-synovitis
#3
Meagan E Tibbo, Cody C Wyles, Peter S Rose, Franklin H Sim, Matthew T Houdek, Michael J Taunton
BACKGROUND: Pigmented villonodular synovitis (PVNS) is a rare, benign, painful proliferation of the synovium previously treated successfully with total hip arthroplasty (THA). Published results come from small series; therefore, the purpose of this study is to investigate the outcomes of THA in the setting of PVNS. METHODS: We identified 25 patients with histologically confirmed, diffuse PVNS who underwent THA between 1971 and 2013. Mean follow-up and age was 10 years and 39 years...
December 29, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29352669/tms-of-primary-motor-cortex-with-a-biphasic-pulse-activates-two-independent-sets-of-excitable-neurones
#4
Martin Sommer, Matteo Ciocca, Raffaella Chieffo, Paul Hammond, Andreas Neef, Walter Paulus, John C Rothwell, Ricci Hannah
BACKGROUND: Biphasic pulses produced by most commercially available TMS machines have a cosine waveform, which makes it difficult to study the interaction between the two phases of stimulation. OBJECTIVE: We used a controllable pulse TMS (cTMS) device delivering quasi-rectangular pulse outputs to investigate whether monophasic are more effective than biphasic pulses. METHODS: Temporally symmetric ("biphasic") or highly asymmetric ("monophasic") charge-balanced biphasic stimuli were used to target the hand area of motor cortex in the anterior-posterior (AP) or posterior-anterior (PA) initial current direction...
January 5, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29352492/variability-of-pulsed-energy-outputs-from-three-dermatology-lasers-during-multiple-simulated-treatments
#5
J Britton
BACKGROUND: Dermatology laser treatments are undertaken at regional departments using lasers of different powers and wavelengths. In order to achieve good outcomes there need to be good consistency of laser output across different weeks as it is custom and practice to break down the treatments into individual fractions. Departments will also collect information from test patches to help decide on the most appropriate treatment parameters for individual patients. OBJECTIVES: The objective of these experiments is to assess the variability of the energy outputs from a small number of lasers across multiple weeks at realistic parameters...
January 20, 2018: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29352453/measuring-surgical-safety-during-minimally-invasive-surgical-procedures-a-validation-study
#6
Mathijs D Blikkendaal, Sara R C Driessen, Sharon P Rodrigues, Johann P T Rhemrev, Maddy J G H Smeets, Jenny Dankelman, John J van den Dobbelsteen, Frank Willem Jansen
BACKGROUND: During the implementation of new interventions (i.e., surgical devices and technologies) in the operating room, surgical safety might be compromised. Current safety measures are insufficient in detecting safety hazards during this process. The aim of the study was to observe whether surgical teams are capable of measuring surgical safety, especially with regard to the introduction of new interventions. METHODS: A Surgical Safety Questionnaire was developed that had to be filled out directly postoperative by three surgical team members...
January 19, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29352326/noninvasive-pulse-contour-analysis-for-determination-of-cardiac-output-in-patients-with-chronic-heart-failure
#7
Sebastian Roth, Henrik Fox, Uwe Fuchs, Uwe Schulz, Angelika Costard-Jäckle, Jan F Gummert, Dieter Horstkotte, Olaf Oldenburg, Thomas Bitter
BACKGROUND: Determination of cardiac output (CO) is essential in diagnosis and management of heart failure (HF). The gold standard to obtain CO is invasive assessment via thermodilution (TD). Noninvasive pulse contour analysis (NPCA) is supposed as a new method of CO determination. However, a validation of this method in HF is pending and performed in the present study. METHODS: Patients with chronic-stable HF and reduced left ventricular ejection fraction (LVEF ≤ 45%; HF-REF) underwent right heart catheterization including TD...
January 19, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29352274/compliance-free-digital-set-and-analog-reset-synaptic-characteristics-of-sub-tantalum-oxide-based-neuromorphic-device
#8
Yawar Abbas, Yu-Rim Jeon, Andrey Sergeevich Sokolov, Sohyeon Kim, Boncheol Ku, Changhwan Choi
A two terminal semiconducting device like a memristor is indispensable to emulate the function of synapse in the working memory. The analog switching characteristics of memristor play a vital role in the emulation of biological synapses. The application of consecutive voltage sweeps or pulses (action potentials) changes the conductivity of the memristor which is considered as the fundamental cause of the synaptic plasticity. In this study, a neuromorphic device using an in-situ growth of sub-tantalum oxide switching layer is fabricated, which exhibits the digital SET and analog RESET switching with an electroforming process without any compliance current (compliance free)...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352239/elucidating-the-mechanism-of-the-considerable-mechanical-stiffening-of-dna-induced-by-the-couple-zn2-calix-4-arene-1-3-o-diphosphorous-acid
#9
Yannick Tauran, Mehmet C Tarhan, Laurent Mollet, Jean Baptiste Gerves, Momoko Kumemura, Laurent Jalabert, Nicolas Lafitte, Ikjoo Byun, Beomjoon Kim, Hiroyuki Fujita, Dominique Collard, Florent Perret, Mickael Desbrosses, Didier Leonard, Christelle Goutaudier, Anthony W Coleman
The couple Calix[4]arene-1,3-O-diphosphorous acid (C4diP) and zinc ions (Zn2+) acts as a synergistic DNA binder. Silicon NanoTweezer (SNT) measurements show an increase in the mechanical stiffness of DNA bundles by a factor of >150, at Zn2+ to C4diP ratios above 8, as compared to Zinc alone whereas C4diP alone decreases the stiffness of DNA. Electroanalytical measurements using 3D printed devices demonstrate a progression of events in the assembly of C4diP on DNA promoted by zinc ions. A mechanism at the molecular level can be deduced in which C4diP initially coordinates to DNA by phosphate-phosphate hydrogen bonds or in the presence of Zn2+ by Zn2+ bridging coordination of the phosphate groups...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352228/dual-band-metamaterial-antenna-for-lte-bluetooth-wimax-system
#10
Md Mehedi Hasan, Mohammad Rashed Iqbal Faruque, Mohammad Tariqul Islam
A compact metamaterial inspired antenna operate at LTE, Bluetooth and WiMAX frequency band is introduced in this paper. For the lower band, the design utilizes an outer square metallic strip forcing the patch to radiate as an equivalent magnetic-current loop. For the upper band, another magnetic current loop is created by adding metamaterial structure near the feed line on the patch. The metamaterial inspired antenna dimension of 42 × 32 mm2 compatible to wireless devices. Finite integration technique based CST Microwave Studio simulator has been used to design and numerical investigation as well as lumped circuit model of the metamaterial antenna is explained with proper mathematical derivation...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352215/magnetically-sensitive-nanodiamond-doped-tellurite-glass-fibers
#11
Yinlan Ruan, David A Simpson, Jan Jeske, Heike Ebendorff-Heidepriem, Desmond W M Lau, Hong Ji, Brett C Johnson, Takeshi Ohshima, Shahraam Afshar V, Lloyd Hollenberg, Andrew D Greentree, Tanya M Monro, Brant C Gibson
Traditional optical fibers are insensitive to magnetic fields, however many applications would benefit from fiber-based magnetometry devices. In this work, we demonstrate a magnetically sensitive optical fiber by doping nanodiamonds containing nitrogen vacancy centers into tellurite glass fibers. The fabrication process provides a robust and isolated sensing platform as the magnetic sensors are fixed in the tellurite glass matrix. Using optically detected magnetic resonance from the doped nanodiamonds, we demonstrate detection of local magnetic fields via side excitation and longitudinal collection...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352149/spin-hall-induced-auto-oscillations-in-ultrathin-yig-grown-on-pt
#12
M Evelt, C Safranski, Mohammed Aldosary, V E Demidov, I Barsukov, A P Nosov, A B Rinkevich, K Sobotkiewich, Xiaoqin Li, Jing Shi, I N Krivorotov, S O Demokritov
We experimentally study nanowire-shaped spin-Hall nano-oscillators based on nanometer-thick epitaxial films of Yttrium Iron Garnet grown on top of a layer of Pt. We show that, although these films are characterized by significantly larger magnetic damping in comparison with the films grown directly on Gadolinium Gallium Garnet, they allow one to achieve spin current-driven auto-oscillations at comparable current densities, which can be an indication of the better transparency of the interface to the spin current...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352148/stochastic-optimization-of-broadband-reflecting-photonic-structures
#13
D Estrada-Wiese, E A Del Río-Chanona, J A Del Río
Photonic crystals (PCs) are built to control the propagation of light within their structure. These can be used for an assortment of applications where custom designed devices are of interest. Among them, one-dimensional PCs can be produced to achieve the reflection of specific and broad wavelength ranges. However, their design and fabrication are challenging due to the diversity of periodic arrangement and layer configuration that each different PC needs. In this study, we present a framework to design high reflecting PCs for any desired wavelength range...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352140/ultra-high-photoresponsivity-in-suspended-metal-semiconductor-metal-mesoscopic-multilayer-mos2-broadband-detector-from-uv-to-ir-with-low-schottky-barrier-contacts
#14
Gustavo A Saenz, Goran Karapetrov, James Curtis, Anupama B Kaul
The design, fabrication, and characterization of ultra-high responsivity photodetectors based on mesoscopic multilayer MoS2 is presented, which is a less explored system compared to direct band gap monolayer MoS2 that has received increasing attention in recent years. The device architecture is comprised of a metal-semiconductor-metal (MSM) photodetector, where Mo was used as the contact metal to suspended MoS2 membranes. The photoresponsivity [Formula: see text] was measured to be ~1.4 × 104 A/W, which is > 104 times higher compared to prior reports, while the detectivity D* was computed to be ~2...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352061/what-to-do-about-fibrin-rich-tough-clots-comparing-the-solitaire-stent-retriever-with-a-novel-geometric-clot-extractor-in-an-in-vitro-stroke-model
#15
Vernard S Fennell, Swetadri Vasan Setlur Nagesh, Karen M Meess, Liza Gutierrez, Rhys H James, Michael E Springer, Adnan H Siddiqui
BACKGROUND: Despite advances in revascularization tools for large vessel occlusion presenting as acute ischemic stroke, a significant subset of clots remain recalcitrant to current strategies. We assessed the effectiveness of a novel thrombectomy device that was specifically designed to retrieve resistant fibrin rich clots, the geometric clot extractor (GCE; Neuravi, Galway, Ireland), in an in vitro cerebrovascular occlusion stroke model. METHODS: After introducing fibrin rich clot analogues into the middle cerebral artery of the model, we compared the rates of recanalization between GCE and Solitaire flow restoration stent retriever (SR; Medtronic, Minneapolis, Minnesota, USA; control group) cases...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29352057/feasibility-complications-morbidity-and-mortality-results-at-6-months-for-aneurysm-treatment-with-the-flow-re-direction-endoluminal-device-report-of-safe-study
#16
Laurent Pierot, Laurent Spelle, Jérôme Berge, Anne-Christine Januel, Denis Herbreteau, Mohamed Aggour, Michel Piotin, Alessandra Biondi, Xavier Barreau, Charbel Mounayer, Chrisanthi Papagiannaki, Jean-Paul Lejeune, Jean-Yves Gauvrit, Vincent Costalat
BACKGROUND AND PURPOSE: Flow diverters are increasingly used for the treatment of intracranial aneurysms. Evaluation of the first devices available for clinical use showed high efficacy of this treatment although safety results were worse compared with coiling or balloon-assisted coiling. The Safety and Efficacy Analysis of FRED Embolic Device in Aneurysm Treatment (SAFE) trial is a single-arm, multicenter, prospective study conducted to precisely analyze the safety and efficacy of the FRED and FRED Jr devices...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29352008/incidence-predictors-and-clinical-outcomes-of-residual-stenosis-after-aortic-valve-in-valve
#17
Sabine Bleiziffer, Magdalena Erlebach, Matheus Simonato, Philippe Pibarot, John Webb, Lukas Capek, Stephan Windecker, Isaac George, Jan-Malte Sinning, Eric Horlick, Massimo Napodano, David M Holzhey, Petur Petursson, Alfredo Cerillo, Nikolaos Bonaros, Enrico Ferrari, Mauricio G Cohen, Giselle Baquero, Tara L Jones, Ankur Kalra, Michael J Reardon, Adnan Chhatriwalla, Vasco Gama Ribeiro, Sami Alnasser, Nicolas M Van Mieghem, Christian Jörg Rustenbach, Joachim Schofer, Santiago Garcia, Tobias Zeus, Didier Champagnac, Raffi Bekeredjian, Ran Kornowski, Rüdiger Lange, Danny Dvir
OBJECTIVE: We aimed to analyse the incidence of prosthesis-patient mismatch (PPM) and elevated gradients after aortic valve in valve (ViV), and to evaluate predictors and associations with clinical outcomes of this adverse event. METHODS: A total of 910 aortic ViV patients were investigated. Elevated residual gradients were defined as ≥20 mm Hg. PPM was identified based on the indexed effective orifice area (EOA), measured by echocardiography, and patient body mass index (BMI)...
January 19, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29351828/activity-during-sleep-measured-by-a-sheet-shaped-body-vibrometer-and-the-severity-of-atopic-dermatitis-in-adults-a-comparison-with-wrist-actigraphy
#18
Takamasa Kogure, Toshiya Ebata
STUDY OBJECTIVES: To use a sheet-shaped body vibrometer (SBV) for measuring sleep in adult patients with atopic dermatitis (AD) of various severities and to compare the results with those measured by wrist actigraphy (WA). METHODS: Simultaneous measurements of activity during sleep by WA and the SBV were performed in 20 outpatients with AD for 5 to 10 days. The mean activity count per minute (ACT) and sleep efficiency (SE) were obtained using each device. The severity of AD was evaluated by the severity scoring of AD (SCORAD), serum thymus and activation-regulated chemokine (TARC) level, serum total immunoglobulin E level, and peripheral eosinophil count...
January 16, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29351783/simple-citrate-anticoagulation-protocol-for-low-flux-haemodialysis
#19
Eng Kuang Lim, Ying-Ying T Seow, Shun E Chen, Gao Yang, Min Er Liaw, Shimi Isaac
BACKGROUND: For patients unable to receive heparin anticoagulation during haemodialysis, saline flushes to reduce circuit clotting are often the norm. Regional citrate anticoagulation (RCA) although effective is not used by many centres including in Singapore. We wanted to demonstrate the superiority and safety of a simple regional citrate anticoagulation regime, compared to saline flushes, for heparin-free low flux haemodialysis. METHODS: This is a prospective, open label, cross over study on 25 sequential haemodialysis sessions for inpatients receiving heparin-free haemodialysis...
January 19, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29351759/tracheal-intubation-in-critically-ill-patients-a-comprehensive-systematic-review-of-randomized-trials
#20
Luca Cabrini, Giovanni Landoni, Martina Baiardo Radaelli, Omar Saleh, Carmine D Votta, Evgeny Fominskiy, Alessandro Putzu, Cézar Daniel Snak de Souza, Massimo Antonelli, Rinaldo Bellomo, Paolo Pelosi, Alberto Zangrillo
BACKGROUND: We performed a systematic review of randomized controlled studies evaluating any drug, technique or device aimed at improving the success rate or safety of tracheal intubation in the critically ill. METHODS: We searched PubMed, BioMed Central, Embase and the Cochrane Central Register of Clinical Trials and references of retrieved articles. Finally, pertinent reviews were also scanned to detect further studies until May 2017. The following inclusion criteria were considered: tracheal intubation in adult critically ill patients; randomized controlled trial; study performed in Intensive Care Unit, Emergency Department or ordinary ward; and work published in the last 20 years...
January 20, 2018: Critical Care: the Official Journal of the Critical Care Forum
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