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https://www.readbyqxmd.com/read/28198093/extracorporeal-total-artificial-heart-as-bailout-surgery
#1
REVIEW
Stéphanie F Perrodin, Olivier Muller, Fabrizio Gronchi, Lucas Liaudet, Roger Hullin, Matthias Kirsch
We report the use of a total extracorporeal heart for uncontrolled bleeding following a proximal left anterior descending artery perforation, using two centrifugal ventricular assist devices after heart explantation. The literature describing similar techniques and patient outcomes for this "bailout" technique are reviewed.
February 15, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28178883/radiofrequency-based-identification-medical-device
#2
Alessandra Lazzaro, Arianna Corona, Luca Iezzi, Silvia Quaresima, Luca Armisi, Ilaria Piccolo, Carlo Maria Medaglia, Sergio Sbrenni, Pierpaolo Sileri, Nicola Rosato, Achille Lucio Gaspari, Nicola Di Lorenzo
BACKGROUND: A retained surgical item in patients (gossypiboma) is a persisting problem, despite consistent improvements and existing guidelines in counting instruments and sponges. Previous experiences with radiofrequency identification technology (RFID) tracking sponges show that it could represent an innovation, in order to reduce the criticism and increase the effectiveness during surgical procedures. We present an automated system that allows reduction of errors and improves safety in the operating room...
January 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28166165/automated-variable-aortic-control-vs-complete-aortic-occlusion-in-a-swine-model-of-hemorrhage
#3
Timothy K Williams, Lucas P Neff, M Austin Johnson, Rachel M Russo, Sarah-Ashley Ferencz, Anders J Davidson, Nathan F Clement, J Kevin Grayson, Todd E Rasmussen
BACKGROUND: Future endovascular hemorrhage control devices will require features that mitigate the adverse effects of vessel occlusion. Permissive regional hypoperfusion (PRH) with variable aortic control (VAC) is a novel strategy to minimize hemorrhage and reduce the ischemic burden of complete aortic occlusion (AO). The objective of this study was to compare PRH with VAC to AO in a lethal model of hemorrhage. METHODS: Twenty-five swine underwent cannulation of the supraceliac aorta, with diversion of aortic flow through an automated extracorporeal circuit...
February 4, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28165747/growth-and-optical-properties-of-direct-band-gap-ge-ge0-87sn0-13-core-shell-nanowire-arrays
#4
Simone Assali, Alain Dijkstra, Ang Li, Sebastian Koelling, Marcel A Verheijen, Luca Gagliano, Nils von den Driesch, Dan Buca, Paul M Koenraad, Jos E M Haverkort, Erik P A M Bakkers
Group IV semiconductor optoelectronic devices are now possible by using strain-free direct band gap GeSn alloys grown on a Ge/Si virtual substrate with Sn contents above 9%. Here, we demonstrate the growth of Ge/GeSn core/shell nanowire arrays with Sn incorporation up to 13% and without the formation of Sn clusters. The nanowire geometry promotes strain relaxation in the Ge0.87Sn0.13 shell and limits the formation of structural defects. This results in room-temperature photoluminescence centered at 0.465 eV and enhanced absorption above 98%...
February 6, 2017: Nano Letters
https://www.readbyqxmd.com/read/28157939/remote-detection-of-rotating-machinery-with-a-portable-atomic-magnetometer
#5
Luca Marmugi, Lorenzo Gori, Sarah Hussain, Cameron Deans, Ferruccio Renzoni
We demonstrate remote detection of rotating machinery, using an atomic magnetometer at room temperature and in an unshielded environment. The system relies on the coupling of the AC magnetic signature of the target with the spin-polarized, precessing atomic vapor of a radio-frequency optical atomic magnetometer. The AC magnetic signatures of rotating equipment or electric motors appear as sidebands in the power spectrum of the atomic sensor, which can be tuned to avoid noisy bands that would otherwise hamper detection...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28151434/detection-of-atrial-fibrillation-episodes-using-a-wristband-device
#6
Valentina D A Corino, Rita Laureanti, Lorenzo Ferranti, Giorgio Scarpini, Federico Lombardi, Luca Mainardi
Undiagnosed atrial fibrillation (AF) patients are at high risk of cardioembolic stroke or other complications. The aim of this study was to analyze the blood volume pulse (BVP) signals obtained from a wristband device and develop an algorithm for discriminating AF from normal sinus rhythm (NSR) or from other arrhythmias (ARR). Thirty patients with AF, 9 with ARR and 31 in NSR were included in the study. The recordings were obtained at rest from Empatica E4 wristband device and lasted 10 minutes. The analysis, on a two-minute segment, included spectral, variability and irregularity analysis performed on the inter-diastolic interval series, and similarity analysis performed on the BVP signal...
February 2, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28149954/colloidal-covalent-organic-frameworks
#7
Brian J Smith, Lucas R Parent, Anna C Overholts, Peter A Beaucage, Ryan P Bisbey, Anton D Chavez, Nicky Hwang, Chiwoo Park, Austin M Evans, Nathan C Gianneschi, William R Dichtel
Covalent organic frameworks (COFs) are two- or three-dimensional (2D or 3D) polymer networks with designed topology and chemical functionality, permanent porosity, and high surface areas. These features are potentially useful for a broad range of applications, including catalysis, optoelectronics, and energy storage devices. But current COF syntheses offer poor control over the material's morphology and final form, generally providing insoluble and unprocessable microcrystalline powder aggregates. COF polymerizations are often performed under conditions in which the monomers are only partially soluble in the reaction solvent, and this heterogeneity has hindered understanding of their polymerization or crystallization processes...
January 25, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28145039/procedural-and-30-day-clinical-outcomes-following-transcatheter-aortic-valve-replacement-with-lotus-valve-results-of-the-relevant-study
#8
Rocco A Montone, Luca Testa, Chiara Fraccaro, Matteo Montorfano, Fausto Castriota, Roberto Nerla, Marco Angelillis, Maurizio Tusa, Francesco Giannini, Andrea Garatti, Giuseppe Tarantini, Anna Sonia Petronio, Nedy Brambilla, Francesco Bedogni
OBJECTIVES: We report procedural and 30-day clinical outcomes following transcatheter aortic valve replacement (TAVR) with Lotus Valve system in a high-risk population. BACKGROUND: Lotus valve is a second-generation TAVR fully repositionable and retrievable device. RELEVANT (REgistry of Lotus valvE for treatment of aortic VAlve steNosis with Tavr) study is an Italian prospective multicentre registry. METHODS: Five major centers performing TAVR using Lotus participated...
February 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28143521/small-forces-that-differ-with-prior-motor-experience-can-communicate-movement-goals-during-human-human-physical-interaction
#9
Andrew Sawers, Tapomayukh Bhattacharjee, J Lucas McKay, Madeleine E Hackney, Charles C Kemp, Lena H Ting
BACKGROUND: Physical interactions between two people are ubiquitous in our daily lives, and an integral part of many forms of rehabilitation. However, few studies have investigated forces arising from physical interactions between humans during a cooperative motor task, particularly during overground movements. As such, the direction and magnitude of interaction forces between two human partners, how those forces are used to communicate movement goals, and whether they change with motor experience remains unknown...
January 31, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28131706/electrical-treatment-of-atrial-arrhythmias-in-heart-failure-patients-implanted-with-a-dual-defibrillator-crt-device-results-from-the-trade-hf-study
#10
Giovanni Luca Botto, Luigi Padeletti, Gregorio Covino, Paolo Pieragnoli, Mattia Liccardo, Barbara Mariconti, Stefano Favale, Giulio Molon, Paolo De Filippo, Leonardo Bolognese, Maurizio Landolina, Giovanni Raciti, Giuseppe Boriani
BACKGROUND: Ventricular and atrial arrhythmias commonly occur in heart failure patients and are a significant source of symptoms, morbidity and mortality. Some specific generators referred to as dual defibrillators, Dual CRT-Ds, have the ability to treat atrial and ventricular arrhythmias. TRADE-HF is a prospective two-arm randomized study aimed at assessing the benefits of complete automatic management of atrial arrhythmias in patients implanted with a dual CRT-D. METHODS: Primary objective of the TRADE-HF study was to document reduction of unplanned hospital admission for cardiac reasons or death for cardiovascular causes or progression to permanent AF, by comparing fully-automatic device driven therapy for atrial tachycardia or fibrillation (AT/AF) to an in-hospital approach for treatment of symptomatic AT/AF...
January 19, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28130950/the-development-of-a-quality-management-framework-for-evaluating-medical-device-reprocessing-practice-in-healthcare-facilities
#11
Bailey Lorv, Robin Horodyski, Cynthia Welton, John Vail, Luca Simonetto, Danilo Jokanovic, Richa Sharma, Angela Rea Mahoney, Shay Savoy-Bird, Shalu Bains
There is increasing awareness of the importance of medical device reprocessing (MDR) for the provision of safe patient care. Although industry service standards are available to guide MDR practices, there remains a lack of published key performance indicators (KPIs) and targets that are necessary to evaluate MDR quality for feedback and improvement. This article outlines the development of an initial framework that builds on established guidelines and includes service standards, KPIs and targets for evaluating MDR operations...
2017: Healthcare Quarterly
https://www.readbyqxmd.com/read/28122073/use-of-cardiac-resynchronization-therapy-among-eligible-patients-receiving-an-implantable-cardioverter-defibrillator-insights-from-the-national-cardiovascular-data-registry-implantable-cardioverter-defibrillator-registry
#12
Lucas N Marzec, Pamela N Peterson, Haikun Bao, Jeptha P Curtis, Frederick A Masoudi, Paul D Varosy, Steven M Bradley
Importance: Cardiac resynchronization therapy (CRT) reduces the risk for mortality and heart failure-related events in select patients. Little is known about the use of CRT in combination with an implantable cardioverter defibrillator (ICD) in patients who are eligible for this therapy in clinical practice. Objective: To (1) identify patient, clinician, and hospital characteristics associated with CRT defibrillator (CRT-D) use and (2) determine the extent of hospital-level variation in the use of CRT-D among guideline-eligible patients undergoing ICD placement...
January 25, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28118710/universal-mechanism-of-bandgap-engineering-in-transition-metal-dichalcogenides
#13
Min Gu Kang, Beomyoung Kim, Sae Hee Ryu, Sung Won Jung, Jimin Kim, Luca Moreschini, Eli Rotenberg, Aaron Bostwick, Keun Su Kim
Two-dimensional (2D) van-der-Waals semiconductors have emerged as a class of materials with promising device characteristics owing to the intrinsic bandgap. For realistic applications, the ideal is to modify the bandgap in a controlled manner by a mechanism that can be generally applied to this class of materials. Here, we report the observation of a universally tunable bandgap in the family of bulk 2H transition metal dichalcogenides (TMDs) by in situ surface doping of Rb atoms. A series of angle-resolved photoemission spectra unexceptionally shows that the bandgap of TMDs at the zone corners is modulated in the range of 0...
January 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28114012/ultrasonic-needles-for-bone-biopsy
#14
Andrew Mathieson, Robert Wallace, Rebecca Cleary, Li Li, Hamish Simpson, Margaret Lucas
Bone biopsy is an invasive clinical procedure where a bone sample is recovered for analysis during the diagnosis of a medical condition. When the architecture of the bone tissue is required to be preserved, a core-needle biopsy is taken. Although this procedure is performed while the patient is under local anaesthesia, the patient can still experience significant discomfort. Additionally, large haematoma can be induced in the soft tissue surrounding the biopsy site due to the large axial and rotational forces which are applied through the needle to penetrate bone...
December 7, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28111101/design-of-a-new-tracking-device-for-on-line-beam-range-monitor-in-carbon-therapy
#15
Giacomo Traini, Giuseppe Battistoni, Angela Bollella, Francesco Collamati, Erika De Lucia, Riccardo Faccini, Fernando Ferroni, Paola Maria Frallicciardi, Carlo Mancini-Terracciano, Michela Marafini, Ilaria Mattei, Federico Miraglia, Silvia Muraro, Riccardo Paramatti, Luca Piersanti, Davide Pinci, Antoni Rucinski, Andrea Russomando, Alessio Sarti, Adalberto Sciubba, Martina Senzacqua, Elena Solfaroli-Camillocci, Marco Toppi, Cecilia Voena, Vincenzo Patera
Charged particle therapy is a technique for cancer treatment that exploits hadron beams, mostly protons and carbon ions. A critical issue is the monitoring of the beam range so to check the correct dose deposition to the tumor and surrounding tissues. The design of a new tracking device for beam range real-time monitoring in pencil beam carbon ion therapy is presented. The proposed device tracks secondary charged particles produced by beam interactions in the patient tissue and exploits the correlation of the charged particle emission profile with the spatial dose deposition and the Bragg peak position...
January 19, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28107368/multi-channel-optical-coherence-elastography-using-relative-and-absolute-shear-wave-time-of-flight
#16
Eli Elyas, Alex Grimwood, Janine T Erler, Simon P Robinson, Thomas R Cox, Daniel Woods, Peter Clowes, Ramona De Luca, Franco Marinozzi, Jérémie Fromageau, Jeffrey C Bamber
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium...
2017: PloS One
https://www.readbyqxmd.com/read/28104306/midterm-and-one-year-outcome-of-amphilimus-polymer-free-drug-eluting-stent-in-patients-needing-short-dual-antiplatelet-therapy-insight-from-the-astute-registry-amphilimus-italian-multicenter-registry
#17
Cosmo Godino, Mauro Chiarito, Michael Donahue, Luca Testa, Riccardo Colantonio, Alberto Cappelletti, Alberto Monello, Valeria Magni, Diego Milazzo, Rosario Parisi, Annamaria Nicolino, Shahram Moshiri, Rossella Fattori, Gianfranco Aprigliano, Altin Palloshi, Giuseppe Caramanno, Matteo Montorfano, Francesco Bedogni, Carlo Briguori, Alberto Margonato, Antonio Colombo
BACKGROUND: To assess clinical outcomes of patients needing short dual antiplatelet therapy (S-DAPT) after PCI with Cre8 polymer-free amphilimus eluting-stent (AES). The Cre8-AES with pure i-Carbofilm coating was supposed to induce faster stent endothelialization and reduce device thrombogenicity. METHODS: We performed a sub-analysis of unrestricted consecutive patients treated with Cre8-AES between August 2011 and January 2015. Two groups were formed: 1) patients discharged with S-DAPT (≤3-month), because of high bleeding risk or attending urgent non-cardiac surgery; and 2) patients discharged with Recommended DAPT duration (R-DAPT; ≥6-month)...
March 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28102087/relationship-quality-of-persons-with-obstructive-sleep-apnoea-syndrome
#18
Francesco Tramonti, Michelangelo Maestri, Luca Carnicelli, Giulia Fava, Valentina Lombardi, Martina Rossi, Monica Fabbrini, Elisa Di Coscio, Elena Iacopini, Enrica Bonanni
In the field of sleep disorders, the quality of couple relationship is arousing increasing attention, given its implications for quality of life and treatment adherence. The aim of the present study was to evaluate relationship quality in a sample of treated or untreated patients with Obstructive Sleep Apnoea Syndrome. Eighty-seven patients were recruited in a hospital-based Centre for Sleep Medicine. Subjects were administered the Dyadic Adjustment Scale (DAS) to evaluate relationship quality, and the Epworth Sleepiness Scale (ESS)...
January 19, 2017: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/28094281/electrically-tunable-organic-inorganic-hybrid-polaritons-with-monolayer-ws2
#19
Lucas C Flatten, David M Coles, Zhengyu He, David G Lidzey, Robert A Taylor, Jamie H Warner, Jason M Smith
Exciton-polaritons are quasiparticles consisting of a linear superposition of photonic and excitonic states, offering potential for nonlinear optical devices. The excitonic component of the polariton provides a finite Coulomb scattering cross section, such that the different types of exciton found in organic materials (Frenkel) and inorganic materials (Wannier-Mott) produce polaritons with different interparticle interaction strength. A hybrid polariton state with distinct excitons provides a potential technological route towards in situ control of nonlinear behaviour...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28092783/pulmonary-emboli-cardiac-arrest-with-cpr-complication-liver-laceration-and-massive-abdominal-bleed-a-case-report
#20
John Lundqvist, Jan G Jakobsson
INTRODUCTION: Massive pulmonary emboli may cause right ventricular failure and backward stasis with parenchymal organ swelling thus increasing the risk for laceration, e.g. if CPR is needed. PRESENTATION OF CASE: A 28-year-old Colombian female with no medical history but taking contraceptive pills and having had a recent longer flight was admitted to Danderyds hospital Emergency Department because of respiratory failure. She developed cardiac arrest in the emergence department following the emergent diagnosis of pulmonary emboli...
January 3, 2017: International Journal of Surgery Case Reports
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