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https://www.readbyqxmd.com/read/28340528/znfe2o4-nanotapers-slag-assistant-growth-and-enhanced-photoelectrochemical-efficiency
#1
Xuefeng She, Zhuo Zhang
In this study, ZnFe2O4 (ZFO) nanotapers are fabricated on the ZnO nanorods (NRs) by recycling rare-earth oxide (REO) slag as the iron source, which thereby exhibits dramatically enhanced photoelectrochemical (PEC) efficiency. Our studies demonstrate that the electron-hole separation and charge migration can be facilitated by the cascade band alignment of ZFO and ZnO and the branched nanotaper structures. Not only the iron source, the slag particles can also act as the passivation layers, leading to improved electron lifetime and significant PEC enhancement...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340197/the-evolution-and-benefit-of-device-therapy-in-patients-listed-for-heart-transplant
#2
Bert Vandenberk, Mark Hinderks, Gabor Voros, Christophe Garweg, Johan Vanhaecke, Rik Willems
Aims: The latest 2015 ESC Guidelines on the prevention of sudden cardiac death make a Class IIa recommendation for ICD implantation in patients listed for heart transplantation. This recommendation was based on expert consensus in view of the sparsity of data. Methods and results: All patients listed for heart transplantation at the University Hospitals of Leuven from 2002 until 2014 were studied retrospectively. Exclusion criteria were age <16 years, cardiac disease other than ischaemic or dilated cardiomyopathy and re-transplantation...
March 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339192/a-novel-exposure-system-termed-navetta-for-in-vitro-laminar-flow-electrodeposition-of-nanoaerosol-and-evaluation-of-immune-effects-in-human-lung-reporter-cells
#3
Evelien Frijns, Sandra Verstraelen, Linda Corinna Stoehr, Jo van Laer, An Jacobs, Jan Peters, Kristof Tirez, Matthew Boyles, Mark Geppert, Pierre Madl, Inge Nelissen, Albert Duschl, Martin Himly
A new prototype air-liquid interface (ALI) exposure system, a flatbed aerosol exposure chamber termed NAVETTA, was developed to investigate deposition of engineered nanoparticles (NPs) on cultured human lung A549 cells directly from the gas phase. This device mimics human lung cell exposure to NPs due to a low horizontal gas flow combined with cells exposed at the ALI. Electrostatic field assistance is applied to improve NP deposition efficiency. As proof-of-principle, cell viability and immune responses after short-term exposure to nano-copper oxide (CuO)-aerosol were determined...
March 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28338899/work-practices-and-radiation-exposure-among-male-radiologic-technologists-assisting-fluoroscopically-guided-interventional-procedures
#4
Jae Won Yun, Eun Shil Cha, Seulki Ko, Won Jin Lee
This study investigated occupational characteristics and radiation exposure among radiologic technologists assisting fluoroscopically guided interventional (FGI) procedures. A nationwide survey of radiologic technologists in South Korea was conducted. Among 8058 male respondents, 664 (8.2%) assisted FGI procedures. The survey data were linked with dosimetry data from the National Dose Registry. Most radiologic technologists assisting FGI procedures were 30-40 years old and employed by general hospitals. These technologists worked in closer proximity to patients during procedures, less frequently used shield screens, more commonly utilized protective devices, and less commonly wore badge dosemeters than the ones not assisting FGI procedures...
March 3, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28338592/open-abdomen-with-vacuum-assisted-wound-closure-and-mesh-mediated-fascial-traction-in-patients-with-complicated-diffuse-secondary-peritonitis-a-single-center-8-year-experience
#5
Matti Tolonen, Panu Mentula, Ville Sallinen, Suvi Rasilainen, Minna Bäcklund, Ari Leppäniemi
BACKGROUND: Open abdomen (OA) treatment in patients with peritonitis is increasing worldwide. Various temporary abdominal closure devices are being used. This study included patients with complicated diffuse secondary peritonitis, OA, and vacuum-assisted wound closure and mesh-mediated fascial traction (VAWCM). The aim of this study was to describe mortality and major morbidity in terms of delayed primary fascial closure (DPFC) and enteroatmospheric fistula rates. METHODS: This was a single academic center retrospective study of consecutive patients with diffuse peritonitis, OA, and VAWCM between years 2008-2016...
March 23, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28337558/improving-on-the-diagnostic-characteristics-of-echocardiography-for-pulmonary-hypertension
#6
Kathleen Broderick-Forsgren, Clemontina A Davenport, Joseph A Sivak, Charles William Hargett, Michael C Foster, Andrew Monteagudo, Alicia Armour, Sudarshan Rajagopal, Kristine Arges, Eric J Velazquez, Zainab Samad
This retrospective study evaluated the diagnostic characteristics of a combination of echocardiographic parameters for pulmonary hypertension (PH). Right ventricular systolic pressure (RVSP) estimation by echocardiography (echo) is used to screen for PH. However, the sensitivity of this method is suboptimal. We hypothesized that RVSP estimation in conjunction with other echo parameters would improve the value of echo for PH. The Duke Echo database was queried for adult patients with known or suspected PH who had undergone both echo and right heart catheterization (RHC) within a 24 h period between 1/1/2008 and 12/31/2013...
March 24, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28337480/intra-channel-stent-release-technique-for-fluoroless-endoscopic-ultrasound-guided-lumen-apposing-metal-stent-placement-changing-the-paradigm
#7
Andrea Anderloni, Fabia Attili, Silvia Carrara, Domenico Galasso, Milena Di Leo, Guido Costamagna, Alessandro Repici, Rastislav Kunda, Alberto Larghi
Background Recently, a novel lumen-apposing fully covered self-expanding metal stent (LA-FCSEMS) mounted on an electrocautery-enhanced delivery system has been developed to perform endoscopic ultrasound (EUS)-guided transluminal drainage. From early experience, however, release of the proximal flange of the stent has mostly been done using endoscopic view guidance to ensure proper positioning. Aim We describe a new technique that we have named the Intra-Channel Stent Release Technique (ICSRT) to perform stent placement under complete EUS control, without the use of either fluoroscopic or endoscopic views...
January 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28336412/a-pilot-prospective-randomized-trial-of-video-versus-direct-laryngoscopy-for-paramedic-endotracheal-intubation
#8
Scott Ducharme, Brandon Kramer, David Gelbart, Caroline Colleran, Brian Risavi, Jestin N Carlson
BACKGROUND: Prehospital intubation poses several unique challenges. Video assisted laryngoscopy has been shown to help increase intubation success in the hospital setting; however, little prospective data have examined video assisted laryngoscopy in traditional ground ambulance agencies. METHODS: We performed a randomized, cross-over, non-blinded trial in ground ambulances comparing first attempt success and overall intubation success between video assisted laryngoscopy using the King Video Laryngoscope (KVL) and direct laryngoscopy (DL)...
March 20, 2017: Resuscitation
https://www.readbyqxmd.com/read/28333785/improving-decision-making-for-advanced-heart-failure-patients-and-caregivers
#9
Colleen K McIlvennan
In this month's Magnet® Perspectives column, Colleen K. McIlvennan, DNP, ANP, lead nurse practitioner, Advanced Heart Failure and Transplantation at the University of Colorado, discusses her groundbreaking research encompassing patients' and caregivers' emotional, rational, and fundamental beliefs when considering a left ventricular assist device (LVAD). Results have led to the development of 2 innovative decision aids that are currently in use by LVAD programs across the United States and Canada. Dr McIlvennan's efforts led to a $2 million grant from the Patient-Centered Outcomes Research Institute, as well as national recognition from the American Heart Association and the Heart Failure Society of America...
April 2017: Journal of Nursing Administration
https://www.readbyqxmd.com/read/28333642/endomicroscopy-for-computer-and-robot-assisted-intervention
#10
Siyang Zuo, Guang-Zhong Yang
Endomicroscopy is a new technique that allows human tissue to be characterized in vivo, and in situ, circumventing the need for conventional biopsy and histology. Despite increased application and growing research interests in this area, the clinical application of endomicroscopy, however, is limited by difficulties in ergonomic control, consistent probe-tissue contact, large area surveillance and retargeting. Recently, advances in high-speed imaging, mosaicing and robotics have aimed to address these difficulties...
March 22, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28333441/direct-chemical-vapor-deposition-growth-and-band-gap-characterization-of-mos2-h-bn-van-der-waals-heterostructures-on-au-foils
#11
Zhepeng Zhang, Xujing Ji, Jianping Shi, Xiebo Zhou, Shuai Zhang, Yue Hou, Yue Qi, Qiyi Fang, Qingqing Ji, Yu Zhang, Min Hong, Pengfei Yang, Xinfeng Liu, Qing Zhang, Lei Liao, Chuanhong Jin, Zhongfan Liu, Yanfeng Zhang
Stacked transition-metal dichalcogenides on hexagonal boron nitride (h-BN) are platforms for high-performance electronic devices. However, such vertical stacks are usually constructed by the layer-by-layer polymer-assisted transfer of mechanically exfoliated layers. This inevitably causes interfacial contamination and device performance degradation. Herein, we develop a two-step, low-pressure chemical vapor deposition synthetic strategy incorporating the direct growth of monolayer h-BN on Au foil with the subsequent growth of MoS2...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28333037/cerebral-hemodynamic-with-intra-aortic-balloon-pump-business-as-usual
#12
Juliana Caldas, Ronney B Panerai, Edson Bor-Seng-Shu, Juliano Almeida, Graziela Ferreira, Ligia Cunha, Ricardo Nogueira, Marcelo Oliveira, Fabio Jatene, Thompson Robinson, Ludhmila Hajjar
Intra-aortic balloon pump (IABP) is commonly used as mechanical support after cardiac surgery or cardiac shock. Although its benefits for cardiac function have been well documented, its effects on cerebral circulation are still controversial. We hypothesized that transfer function analysis (TFA) and continuous estimates of dynamic cerebral autoregulation (CA) provide consistent results in the assessment of cerebral autoregulation in patients with IABP. Continuous recordings of blood pressure (BP, intra-arterial line), end-tidal CO2, heart rate and cerebral blood flow velocity (CBFV, transcranial Doppler) were obtained i) 5 minutes with IABP ratio 1:3, ii) 5 minutes, starting 1 minute with the IABP-ON, and continuing for another 4 minutes without pump assistance (IABP-OFF)...
March 23, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28332444/a-functional-electrical-stimulation-system-for-human-walking-inspired-by-reflexive-control-principles
#13
Lin Meng, Bernd Porr, Catherine A Macleod, Henrik Gollee
This study presents an innovative multichannel functional electrical stimulation gait-assist system which employs a well-established purely reflexive control algorithm, previously tested in a series of bipedal walking robots. In these robots, ground contact information was used to activate motors in the legs, generating a gait cycle similar to that of humans. Rather than developing a sophisticated closed-loop functional electrical stimulation control strategy for stepping, we have instead utilised our simple reflexive model where muscle activation is induced through transfer functions which translate sensory signals, predominantly ground contact information, into motor actions...
April 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28332395/electrolyte-gated-red-green-and-blue-organic-light-emitting-diodes
#14
Jiang Liu, Dustin Yuan Chen, Xinning Luan, Kwing Tong, Fangchao Zhao, Chao Liu, Qibing Pei, Huaping Li
We report vertical, electrolyte-gated, red, green and blue phosphorescent small molecule organic light emitting diodes (OLED), in which light emission was modified by tuning the electron injection via electrochemical doping of the electron injection layer 4,4-bis(N-carbazolyl)-1,1-biphenyl (CBP) under the assistance of a polymer electrolyte. These devices comprise an electrolyte capacitor on top of a conventional OLED, with the interfacial contact between the electrolyte and electron injection layer CBP of OLEDs achieved through a porous cathode...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28331371/vacuum-assisted-cesarean-section
#15
REVIEW
Ross W McQuivey, Jon E Block
There has been a dramatic rise in the frequency of cesarean sections, surpassing 30% of all deliveries in the US. This upsurge, coupled with a decreasing willingness to allow vaginal birth after cesarean section, has resulted in an expansion of the use of vacuum assistance to safely extract the fetal head. By avoiding the use of a delivering hand or forceps blade, the volume being delivered through the uterine incision can be decreased when the vacuum is used properly. Reducing uterine extensions with their associated complications (eg, excessive blood loss) in difficult cases is also a theoretical advantage of vacuum delivery...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28331275/the-use-of-the-endograb%C3%A2-port-free-endocavity-retractor-in-single-incision-laparoscopic-right-hemicolectomy
#16
Yasumitsu Hirano, Masakazu Hattori, Kenji Douden, Yasuo Hashizume
The EndoGrab™ Port-Free Endocavity Retractor is an internally anchored retracting device that enables surgeons to reduce not only the number of ports and incisions but also the number of assistant surgeons. Our institution performs single-incision laparoscopic colectomy (SILC) as a routine procedure. Forty-nine patients underwent a single-incision laparoscopic right hemicolectomy. In this procedure, we use this retractor to the mesenteric tissue, including the ileocolic vessels and the mesentery of the transverse colon, and overcame the technical problems related to SILC and showed excellent short-term outcomes...
February 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28331240/minimally-invasive-breast-fibroadenoma-excision-using-an-ultrasound-guided-vacuum-assisted-biopsy-device
#17
Thomas Papathemelis, Stefanie Heim, Michael P Lux, Ines Erhardt, Anton Scharl, Sophia Scharl
Introduction We studied the extent to which an ultrasound-guided vacuum-assisted biopsy device ("hand-held Mammotome") could be used not only as a valuable tool for investigation of suspicious breast lesions, but also therapeutically for the complete removal of breast fibroadenomas. Materials and Methods 132 aspiration biopsies showing fibroadenoma on histology were collected retrospectively. We ascertained whether there were residual findings on breast ultrasound at a median follow-up of approx. 9 months following biopsy...
February 2017: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/28331172/an-anti-coagulation-conundrum-implantation-of-total-artificial-heart-in-a-patient-with-heparin-induced-thrombocytopenia-type-ii
#18
Theodore J Cios, Yuliana Salamanca-Padilla, Dmitri Guvakov
BACKGROUND Heparin-induced thrombocytopenia (HIT) is a rare but life-threatening complication of heparin administration. It can present a major clinical dilemma for physicians caring for patients requiring life-saving urgent or emergent cardiac surgery. Studies have been published examining the use of alternative anticoagulants for patients undergoing cardiopulmonary bypass (CPB), however, evidence does not clearly support any particular approach. Presently, there are no large-scale, prospective randomized studies examining the impact of alternative anticoagulants on clinical outcomes for HIT-positive patients requiring cardiac surgery...
March 23, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28330991/limb-flexion-induced-twist-and-associated-intramural-stresses-in-the-human-femoropopliteal-artery
#19
Anastasia Desyatova, William Poulson, Paul Deegan, Carol Lomneth, Andreas Seas, Kaspars Maleckis, Jason MacTaggart, Alexey Kamenskiy
High failure rates of femoropopliteal artery (FPA) interventions are often attributed to severe mechanical deformations that occur with limb movement. Torsion of the FPA likely plays a significant role, but is poorly characterized and the associated intramural stresses are currently unknown. FPA torsion in the walking, sitting and gardening postures was characterized in n = 28 in situ FPAs using intra-arterial markers. Principal mechanical stresses and strains were quantified in the superficial femoral artery (SFA), adductor hiatus segment (AH) and the popliteal artery (PA) using analytical modelling...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28330751/reduction-in-heart-failure-hospitalizations-with-ambulatory-hemodynamic-monitoring-seen-in-clinical-trials-is-maintained-in-the-real-world
#20
Akshay S Desai, Arvind Bhimaraj, Rupinder Bharmi, Rita Jermyn, Kunjan Bhatt, David Shavelle, Margaret M Redfield, Robert Hull, Jamie A Pelzel, Kevin Davis, Nirav Dalal, Philip B Adamson, J Thomas Heywood
BACKGROUND: In the CHAMPION trial, heart failure hospitalization (HFH) rates were lower in patients managed with guidance from an implantable pulmonary artery pressure (PAP) sensor compared to usual care. OBJECTIVES: To examine the effectiveness of ambulatory hemodynamic monitoring in reducing HFH outside the clinical trial setting. METHODS: We conducted a retrospective cohort study using US Medicare claims data from patients undergoing PAP sensor implantation between 6/1/2014 and 12/31/2015...
March 9, 2017: Journal of the American College of Cardiology
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