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https://www.readbyqxmd.com/read/29150765/finite-element-design-optimization-of-a-hyaluronic-acid-based-hydrogel-drug-delivery-device-for-improved-retention
#1
Jourdan Colter, Barbara Wirostko, Brittany Coats
Drug-loaded hydrogel devices are emerging as an effective means of localized and sustained drug delivery for the treatment of corneal conditions and injuries. One such device uses a novel, thiolated crosslinked carboxymethylated, hyaluronic acid-based hydrogel (CMHA-S) film to deliver drug to the ocular surface upon placement into the inferior fornix of the eye. While proven to be very safe and effective, the CMHA-S film tends to dislodge in the highly-lubricated ocular environment, thereby reducing drug delivery efficiency and drug efficacy...
November 17, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29150695/new-angle-measurement-device-to-control-the-posterior-tibial-slope-angle-in-medial-opening-wedge-high-tibial-osteotomy
#2
Hiroyasu Ogawa, Kazu Matsumoto, Haruhiko Akiyama
INTRODUCTION: Medial opening wedge high tibial osteotomy has been associated with an unintentional increase in the posterior tibial slope angle. We aimed to evaluate the effectiveness of a novel bone spreader angle rod to maintain the native posterior tibial slope angle in medial opening wedge high tibial osteotomy. MATERIALS AND METHODS: Data from 92 consecutive knees in 83 patients who underwent medial opening wedge high tibial osteotomy for knee osteoarthritis between March 2015 and June 2016 were analysed...
November 17, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29149516/feasibility-of-percutaneous-left-atrial-appendage-closure-using-a-novel-lambre-occluder-in-patients-with-atrial-fibrillation-initial-results-from-a-prospective-cohort-registry-study
#3
Shaojie Chen, Boris Schmidt, Stefano Bordignon, Fabrizio Bologna, Takahiko Nagase, Nikolaos Tsianakas, Laura Perrotta, K R Julian Chun
BACKGROUND: The LAmbreۛ occluder is a novel device for percutaneous left atrial appendage closure (LAAC). The presented study aimed to report the initial experience in implantation of the novel LAmbre for LAAC in patients with non-valvular AF. METHODS: We conducted a prospective, observational, cohort registry study to evaluate the feasibility of percutaneous LAAC using the LAmbre occlude. RESULTS: Thirty patients (15 female, mean age 77...
November 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29149508/implementing-quantum-search-algorithm-with-metamaterials
#4
Weixuan Zhang, Kaiyang Cheng, Chao Wu, Yi Wang, Hongqiang Li, Xiangdong Zhang
Metamaterials, artificially structured electromagnetic (EM) materials, have enabled the realization of many unconventional EM properties not found in nature, such as negative refractive index, magnetic response, invisibility cloaking, and so on. Based on these man-made materials with novel EM properties, various devices are designed and realized. However, quantum analog devices based on metamaterials have not been achieved so far. Here, metamaterials are designed and printed to perform quantum search algorithm...
November 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29149268/mitral-valve-replacement-with-the-novel-tribio-and-an-established-stented-bioprosthesis-in-a-sheep-model
#5
Sina Stock, Hans-Hinrich Sievers, Doreen Richardt, Michael Scharfschwerdt
OBJECTIVES: Heart valve replacement with a bioprosthesis is one of the most frequently performed procedures in cardiac surgery and represents a highly effective therapy to relieve diseased heart valves. Nevertheless, as postoperatively elevated transvalvular gradients and prosthesis-patient mismatch are reported as shortcomings of the procedure or of the currently used devices, there is a need for novel bioprostheses with improved haemodynamics. This study presents preclinical haemodynamic results after mitral valve replacement with the novel TRIBIO bioprosthesis (TRIBIO) compared with an established bioprosthesis in a sheep model...
November 15, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29149034/multiferroic-hysteresis-loop
#6
Alexander Ruff, Alois Loidl, Stephan Krohns
Multiferroics, showing both ferroelectric and magnetic order, are promising candidates for future electronic devices. Especially, the fundamental understanding of ferroelectric switching is of key relevance for further improvements, which however is rarely reported in literature. On a prime example for a spin-driven multiferroic, LiCuVO₄, we present an extensive study of the ferroelectric order and the switching behavior as functions of external electric and magnetic fields. From frequency-dependent polarization switching and using the Ishibashi-Orihara theory, we deduce the existence of ferroelectric domains and domain-walls...
November 17, 2017: Materials
https://www.readbyqxmd.com/read/29148829/volumetric-absorptive-microsampling-combined-with-impact-assisted-extraction-for-hematocrit-effect-free-assays
#7
Nikolay Youhnovski, Laurence Mayrand-Provencher, Eugénie-Raphaëlle Bérubé, Jeff Plomley, Hélène Montpetit, Milton Furtado, Anahita Keyhani
AIM: Volumetric absorptive microsampling (VAMS) is a recent technology available for sampling and analyzing low blood volume. The present work describes the utilization of VAMS for the quantitation of naproxen and ritonavir in human blood using a novel bead-based impact-assisted extraction (IAE) procedure. RESULTS: Sampling volume accuracy of the VAMS device was independent of the blood hematocrit (HCT) level, however analyte recovery decreased with increasing HCT when extracted using ultrasonication...
November 17, 2017: Bioanalysis
https://www.readbyqxmd.com/read/29148713/wireless-acoustic-surface-actuators-for-miniaturized-endoscopes
#8
Tian Qiu, Fabian Adams, Stefano Palagi, Kai Melde, Andrew G Mark, Ulrich Wetterauer, Arkadiusz Miernik, Peer Fischer
Endoscopy enables minimally invasive procedures in many medical fields, such as urology. However, current endoscopes are normally cable-driven, which limits their dexterity and makes them hard to miniaturize. Indeed current urological endoscopes have an outer diameter of about 3 mm and still only possess one bending degree of freedom. In this paper, we report a novel wireless actuation mechanism that increases the dexterity and that permits the miniaturization of a urological endoscope. The novel actuator consists of thin active surfaces that can be readily attached to any device and are wirelessly powered by ultrasound...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148243/are-new-devices-required-to-reduce-contrast-load-in-the-cath-lab-or-is-behavioral-change-sufficient
#9
EDITORIAL
Toby Rogers, Lowell F Satler
A novel device that diverts a proportion of contrast injected by hand through the manifold can potentially reduce volume of contrast delivered to the patient by almost 50% to reduce risk of contrast-induced nephropathy. Another simple solution to reducing contrast volume is to limit the number of angiographic views and cine runs acquired. A conscious effort by the angiographer to limit the contrast volume to less than the eGFR should be considered.
November 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29147876/objective-differences-in-colonoscopy-technique-between-trainee-and-expert-endoscopists-using-the-colonoscopy-force-monitor
#10
Alexander R Ende, Piet De Groen, Bryan L Balmadrid, Joo Ha Hwang, John Inadomi, Tomasz Wojtera, Vladimir Egorov, Noune Sarvazyan, Louis Korman
BACKGROUND: Learning to perform colonoscopy safely and effectively is central to gastroenterology fellowship programs. The application of force to the colonoscope is an important part of colonoscopy technique. AIMS: We compared force application during colonoscopy between novice and expert endoscopists using a novel device to determine differences in colonoscopy technique. METHODS: This is an observational cohort study designed to compare force application during colonoscopy between novice and experienced trainees, made up of gastroenterology fellows from two training programs, and expert endoscopists from both academic and private practice settings...
November 17, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29147693/using-evaporation-to-control-capillary-instabilities-in-micro-systems
#11
Rodrigo Ledesma-Aguilar, Gianluca Laghezza, Julia M Yeomans, Dominic Vella
The instabilities of fluid interfaces represent both a limitation and an opportunity for the fabrication of small-scale devices. Just as non-uniform capillary pressures can destroy micro-electrical mechanical systems (MEMS), so they can guide the assembly of novel solid and fluid structures. In many such applications the interface appears during an evaporation process and is therefore only present temporarily. It is commonly assumed that this evaporation simply guides the interface through a sequence of equilibrium configurations, and that the rate of evaporation only sets the timescale of this sequence...
November 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/29146942/efficient-near-infrared-light-emitting-electrochemical-cell-nir-leec-based-on-new-binuclear-ruthenium-phenanthroimidazole-exhibiting-desired-charge-carrier-dynamics
#12
Babak Nemati Bideh, Hashem Shahroosvand
Near-infrared light-emitting electrochemical cell (NIR-LEEC) has emerged as a new and promising lighting sourcewhich could serve as low-cost alternatives in NIR light-emitting sources which are typically expensive. LECs were also shown advantages such as light weight, simplicity and low operation voltages. However, only a few examples of NIR-LEEC are reported in which external quantum efficiency(EQE) of devices limited to 0.1%. Here, we report, efficient NIR-LEEC based of two novel binuclear ruthenium phenanthroimidzole complex which differ by employing the type of ancillary ligand including 2, 2'bipyridine (bpy) (B1) and 4, 4' dimethyl bpy (B2) that realize maximum EQE of 0...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146939/optomechanical-terahertz-detection-with-single-meta-atom-resonator
#13
Cherif Belacel, Yanko Todorov, Stefano Barbieri, Djamal Gacemi, Ivan Favero, Carlo Sirtori
Most of the common technologies for detecting terahertz photons (>1 THz) at room temperature rely on slow thermal devices. The realization of fast and sensitive detectors in this frequency range is indeed a notoriously difficult task. Here we propose a novel device consisting of a subwavelength terahertz meta-atom resonator, which integrates a nanomechanical element and allows energy exchange between the mechanical motion and the electromagnetic degrees of freedom. An incident terahertz wave thus produces a nanomechanical signal that can be read out optically with high precision...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29145233/prospective-evaluation-of-the-feasibility-safety-and-efficacy-of-cocoon-duct-occluder-for-transcatheter-closure-of-large-patent-ductus-arteriosus-a-single-center-study-with-short-and-medium-term-follow-up-results
#14
Santosh Kumar Sinha, Mahmadula Razi, Rama Niwas Pandey, Prakash Kumar, Vinay Krishna, Mukesh Jitendra Jha, Vikas Mishra, Mohammad Asif, Nasar Abdali, Pradyot Tewari, Ramesh Thakur, Umeshwar Pandey, Chandra Mohan Varma
OBJECTIVE: To evaluate the feasibility, safety, and efficacy of a novel Cocoon Duct Occluder device for the transcatheter closure (TCC) of large patent ductus arteriosus (PDA). METHODS: In this prospective, non-randomized study, consecutive patients with large PDA (narrowest diameter: ≥3.5/4.0 mm in symptomatic/asymptomatic patients, respectively), who underwent TCC with Cocoon Duct Occluder at our institute between November, 2012 and June, 2016 were examined...
November 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/29144898/re-a-novel-automatic-regulatory-device-for-continuous-bladder-irrigation-based-on-wireless-sensor-in-patients-after-transurethral-resection-of-the-prostate-a-prospective-investigation
#15
https://www.readbyqxmd.com/read/29144629/single-perineal-incision-placement-of-artificial-urinary-sphincter-with-cadaveric-correlation-of-sub-dartos-pump-placement
#16
Cooper R Benson, Hajar I Ayoub, O Lenaine Westney
PURPOSE: We present a novel AUS implantation technique using a single perineal incision for single device placement or in combination with an inflatable penile prosthesis (IPP). Urinary and sexual dysfunction following the management of prostate cancer has a significant impact on the quality of life of our patients. While there are marginal changes in the prosthetic devices, we strive to reduce post-operative morbidity while maximizing efficacy. MATERIALS AND METHODS: We retrospectively reviewed the outcomes of 6 patients who underwent single perineal incision placement of a virgin AUS in 2014, 3 with simultaneous IPP placement...
November 19, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29144392/design-and-development-of-a-novel-upper-limb-cycling-prosthesis
#17
Akira Tiele, Shivam Soni-Sadar, Jack Rowbottom, Shilen Patel, Edward Mathewson, Samuel Pearson, David Hutchins, John Head, Stephen Hutchins
The rise in popularity of the Paralympics in recent years has created a need for effective, low-cost sports-prosthetic devices for upper-limb amputees. There are various opportunities for lower-limb amputees to participate in cycling; however, there are only few options for those with upper-limb amputations. If the individual previously participated in cycling, a cycling-specific prosthesis could allow these activities to be integrated into rehabilitation methods. This article describes the processes involved with designing, developing and manufacturing such a prosthesis...
November 16, 2017: Bioengineering
https://www.readbyqxmd.com/read/29143795/deep-see-joint-object-detection-tracking-and-recognition-with-application-to-visually-impaired-navigational-assistance
#18
Ruxandra Tapu, Bogdan Mocanu, Titus Zaharia
In this paper, we introduce the so-called DEEP-SEE framework that jointly exploits computer vision algorithms and deep convolutional neural networks (CNNs) to detect, track and recognize in real time objects encountered during navigation in the outdoor environment. A first feature concerns an object detection technique designed to localize both static and dynamic objects without any a priori knowledge about their position, type or shape. The methodological core of the proposed approach relies on a novel object tracking method based on two convolutional neural networks trained offline...
October 28, 2017: Sensors
https://www.readbyqxmd.com/read/29143526/two-dimensional-semiconducting-boron-monolayers
#19
Shao-Gang Xu, Xiao-Tian Li, Yujun Zhao, Ji-Hai Liao, Wang-Ping Xu, Xiao-Bao Yang, Hu Xu
The two-dimensional boron monolayers were reported to be metallic both in previous theoretical predictions and experimental observations. Unexpectedly, we have firstly found a family of boron monolayers with the novel semiconducting property as confirmed by the first-principles calculations with the quasi-particle G0W0 approach. We demonstrate that the connected network of hexagonal vacancies dominates the gap opening for both the in-plane(s+px,y) and pz orbitals, with which various semiconducting boron monolayers are designed to realize the band-gap engineering for the potential applications in electronic devices...
November 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29143003/a-mixed-dimensional-light-emitting-diode-based-on-a-p-mos2-nanosheet-and-an-n-cdse-nanowire
#20
Pan Li, Kai Yuan, Der-Yuh Lin, Xiaolong Xu, Yilun Wang, Yi Wan, Haoran Yu, Kun Zhang, Yu Ye, Lun Dai
The construction of the mixed-dimensional van der Waals (vdW) heterostructures with two-dimensional (2D) and one-dimensional (1D) materials can advantageously integrate their respective dimensional properties to produce new device functionalities and/or enhance device performance. In this case, a single semiconductor nanowire (NW) can function as an optical cavity and a gain medium, while the atomically thin 2D material does not strongly absorb the NW's light emission or disturb the optical propagation mode...
November 16, 2017: Nanoscale
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