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https://www.readbyqxmd.com/read/28526944/ventilator-data-extraction-with-a-video-display-image-capture-and-processing-system
#1
David B Wax, Bryan Hill, Matthew A Levin
Medical hardware and software device interoperability standards are not uniform. The result of this lack of standardization is that information available on clinical devices may not be readily or freely available for import into other systems for research, decision support, or other purposes. We developed a novel system to import discrete data from an anesthesia machine ventilator by capturing images of the graphical display screen and using image processing to extract the data with off-the-shelf hardware and open-source software...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28526883/openspritzer-an-open-hardware-pressure-ejection-system-for-reliably-delivering-picolitre-volumes
#2
C J Forman, H Tomes, B Mbobo, R J Burman, M Jacobs, T Baden, J V Raimondo
The ability to reliably and precisely deliver picolitre volumes is an important component of biological research. Here we describe a high-performance, low-cost, open hardware pressure ejection system (Openspritzer), which can be constructed from off the shelf components. The device is capable of delivering minute doses of reagents to a wide range of biological and chemical systems. In this work, we characterise the performance of the device and compare it to a popular commercial system using two-photon fluorescence microscopy...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28524449/technical-feasibility-and-safety-of-image-guided-parieto-occipital-ventricular-catheter-placement-with-the-assistance-of-a-wearable-head-up-display
#3
Jang W Yoon, Robert E Chen, Karim ReFaey, Roberto J Diaz, Ronald Reimer, Ricardo J Komotar, Alfredo Quinones-Hinojosa, Benjamin L Brown, Robert E Wharen
BACKGROUND: Wearable technology is growing in popularity as a result of its ability to interface with normal human movement and function. METHODS: Using proprietary hardware and software, neuronavigation images were captured and transferred wirelessly via a password-encrypted network to the head-up display. The operating surgeon wore a loupe-mounted wearable head-up display during image-guided parieto-occipital ventriculoperitoneal shunt placement in two patients...
May 19, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28524068/detection-of-magnetic-field-properties-using-distributed-sensing-a-computational-neuroscience-approach
#4
Brian K Taylor, Sönke Johnsen, Kenneth J Lohmann
Diverse taxa use Earth's magnetic field to aid both short- and long-distance navigation. Study of these behaviors has led to a variety of postulated sensory and processing mechanisms that remain unconfirmed. Although several models have been proposed to explain and understand these mechanisms' underpinnings, they have not necessarily connected a putative sensory signal to the nervous system. Using mathematical software simulation, hardware testing and the computational neuroscience tool of dynamic neural fields, the present work implements a previously developed conceptual model for processing magnetite-based magnetosensory data...
May 19, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28523340/patient-and-surgical-characteristics-that-affect-revision-risk-in-dynamic-intraligamentary-stabilization-of-the-anterior-cruciate-ligament
#5
Philipp Henle, Kathrin S Bieri, Manuel Brand, Emin Aghayev, Jessica Bettfuehr, Janosch Haeberli, Martina Kess, Stefan Eggli
PURPOSE: Failure of dynamic intraligamentary stabilization (DIS) that requires revision surgery of the anterior cruciate ligament (ACL) has not been studied. The aim of this study was to investigate the incidence of revision ACL surgery, and the patient characteristics and surgery-related factors that are associated with an increased risk of ACL revision after DIS. METHODS: This study analysed a prospective, consecutively documented single-centre case series using standardized case report forms over a 2...
May 18, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28522970/automatic-optimization-of-the-computation-graph-in-the-nengo-neural-network-simulator
#6
Jan Gosmann, Chris Eliasmith
One critical factor limiting the size of neural cognitive models is the time required to simulate such models. To reduce simulation time, specialized hardware is often used. However, such hardware can be costly, not readily available, or require specialized software implementations that are difficult to maintain. Here, we present an algorithm that optimizes the computational graph of the Nengo neural network simulator, allowing simulations to run more quickly on commodity hardware. This is achieved by merging identical operations into single operations and restructuring the accessed data in larger blocks of sequential memory...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28520421/examining-the-feasibility-of-using-free-energy-perturbation-fep-in-predicting-protein-stability
#7
Melissa Coates Ford, Kerim Babaoglu
The importance of engineering protein stability is well known and has the potential to impact many fields ranging from pharmaceuticals to food sciences. Engineering proteins can be both a time consuming and expensive experimental process. The use of computation is a potential solution to mitigating some of the time and expenses required to engineer a protein. This process has been previously hindered by inaccurate force fields or energy equations and slow computational processors, however improved software and hardware have made this goal much more attainable...
May 18, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28520235/high-dimensional-neural-network-potentials-for-complex-systems
#8
Jörg Behler
Modern simulation techniques have reached a level of maturity, which allows addressing a wide range of problems in chemistry and materials science. Unfortunately, the application of first principles methods with predictive power is still limited to rather small systems, and in spite of the rapid evolution of computer hardware no fundamental change of this situation can be expected. Consequently, to reach an atomic level understanding of complex systems, the development of more efficient but equally reliable atomistic potentials has received considerable attention in recent years...
May 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28513203/automating-the-incremental-evolution-of-controllers-for-physical-robots
#9
Andrés Faíña, Lars Toft Jacobsen, Sebastian Risi
Evolutionary robotics is challenged with some key problems that must be solved, or at least mitigated extensively, before it can fulfill some of its promises to deliver highly autonomous and adaptive robots. The reality gap and the ability to transfer phenotypes from simulation to reality constitute one such problem. Another lies in the embodiment of the evolutionary processes, which links to the first, but focuses on how evolution can act on real agents and occur independently from simulation, that is, going from being, as Eiben, Kernbach, & Haasdijk [2012, p...
May 17, 2017: Artificial Life
https://www.readbyqxmd.com/read/28513201/real-world-evolution-of-robot-morphologies-a-proof-of-concept
#10
Milan Jelisavcic, Matteo de Carlo, Elte Hupkes, Panagiotis Eustratiadis, Jakub Orlowski, Evert Haasdijk, Joshua E Auerbach, A E Eiben
Evolutionary robotics using real hardware has been almost exclusively restricted to evolving robot controllers, but the technology for evolvable morphologies is advancing quickly. We discuss a proof-of-concept study to demonstrate real robots that can reproduce. Following a general system plan, we implement a robotic habitat that contains all system components in the simplest possible form. We create an initial population of two robots and run a complete life cycle, resulting in a new robot, parented by the first two...
May 17, 2017: Artificial Life
https://www.readbyqxmd.com/read/28512434/evaluation-of-a-rapid-anisotropic-model-for-ecg-simulation
#11
Simone Pezzuto, Peter Kal'avský, Mark Potse, Frits W Prinzen, Angelo Auricchio, Rolf Krause
State-of-the-art cardiac electrophysiology models that are able to deliver physiologically motivated activation maps and electrocardiograms (ECGs) can only be solved on high-performance computing architectures. This makes it nearly impossible to adopt such models in clinical practice. ECG imaging tools typically rely on simplified models, but these neglect the anisotropic electric conductivity of the tissue in the forward problem. Moreover, their results are often confined to the heart-torso interface. We propose a forward model that fully accounts for the anisotropic tissue conductivity and produces the standard 12-lead ECG in a few seconds...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28509409/soft-tissue-reconstruction-and-salvage-of-infected-fixation-hardware-in-lower-extremity-trauma
#12
Hyuma A Leland, Alexis D Rounds, Karen E Burtt, Daniel J Gould, Geoffrey S Marecek, Ram K Alluri, Ketan M Patel, Joseph N Carey
BACKGROUND: Tibial fracture management may be complicated by infection of internal fixation hardware (iIFH) resulting in increased morbidity and amputation rate. When iIFH removal is not possible, salvage of the lower extremity is attempted through debridement, antibiotics, and vascularized soft tissue coverage. This study investigates lower extremity salvage with retention of iIFH. METHODS: Demographics, outcomes, and bacterial speciation in patients with tibial fractures at a level 1 trauma center from 2007 to 2014 were reviewed...
May 16, 2017: Microsurgery
https://www.readbyqxmd.com/read/28509357/characterization-of-microbial-mixtures-by-mass-spectrometry
#13
REVIEW
Todd R Sandrin, Plamen A Demirev
MS applications in microbiology have increased significantly in the past 10 years, due in part to the proliferation of regulator-approved commercial MALDI MS platforms for rapid identification of clinical infections. In parallel, with the expansion of MS technologies in the "omics" fields, novel MS-based research efforts to characterize organismal as well as environmental microbiomes have emerged. Successful characterization of microorganisms found in complex mixtures of other organisms remains a major challenge for researchers and clinicians alike...
May 16, 2017: Mass Spectrometry Reviews
https://www.readbyqxmd.com/read/28508007/five-year-outcomes-after-treatment-for-acute-instability-of-the-tibiofibular-syndesmosis-using-a-suture-button-fixation-system
#14
Paul F Förschner, Knut Beitzel, Andreas B Imhoff, Stefan Buchmann, Georg Feuerriegel, Felix Hofmann, Dimitrios C Karampinos, Pia Jungmann, Jonas Pogorzelski
BACKGROUND: Suture-button repair is a widely accepted surgical treatment for acute and isolated ankle syndesmosis injuries. To our knowledge, midterm results have not previously been reported. PURPOSE: To evaluate the clinical, qualitative, and quantitative radiological midterm outcomes of suture-button repair after acute isolated ankle syndesmosis injuries. STUDY DESIGN: Retrospective case series; Level of evidence, 4. METHODS: Clinical outcomes were measured using the Foot and Ankle Disability Index (FADI) and the American Orthopaedic Foot and Ankle Society (AOFAS) score...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28507964/intra-articular-migration-of-broken-patellar-tension-band-wire-a-rare-case
#15
Satish Kumar Sharma, Sonendra Kumar Sharma, Mohammed Aslam, Gagan Naresh Chadha
INTRODUCTION: Comminuted fracture of patella is most commonly treated by tension band wiring with cerclage wiring. Broken cerclage wiring after such surgery is not uncommon but intra-articular migration of broken cerclage wire is rarely known and described complication. CASE REPORT: A 51-year-old male patient of Indian origin which was treated, 15 months back for fracture patella with tension band wiring with cerclage wiring, presented with painful restriction of knee movements for the last 4 weeks...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28506470/coronary-ct-angiography-in-the-emergency-department-utilizing-second-and-third-generation-dual-source-ct
#16
Nandini M Meyersohn, Balint Szilveszter, Pedro V Staziaki, Jan-Erik Scholtz, Richard A P Takx, Udo Hoffmann, Brian B Ghoshhajra
BACKGROUND: Coronary computed tomography angiography (coronary CTA) allows efficient triage of low to intermediate risk patients with suspected acute coronary syndrome (ACS) in the emergency department (ED). Techniques for coronary CTA acquisition in the ED continue to evolve with the establishment of standardized scan protocols and the introduction of newer generations of CT hardware. OBJECTIVES: To evaluate qualitative and quantitative image quality and radiation dose exposure of coronary CTA acquired on 2nd versus 3rd generation dual source CT (DSCT) scanners using a standardized institutional scan protocol designed for the ED...
March 22, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28505078/intra-minute-cloud-passing-forecasting-based-on-a-low-cost-iot-sensor-a-solution-for-smoothing-the-output-power-of-pv-power-plants
#17
Primož Sukič, Gorazd Štumberger
Clouds moving at a high speed in front of the Sun can cause step changes in the output power of photovoltaic (PV) power plants, which can lead to voltage fluctuations and stability problems in the connected electricity networks. These effects can be reduced effectively by proper short-term cloud passing forecasting and suitable PV power plant output power control. This paper proposes a low-cost Internet of Things (IoT)-based solution for intra-minute cloud passing forecasting. The hardware consists of a Raspberry PI Model B 3 with a WiFi connection and an OmniVision OV5647 sensor with a mounted wide-angle lens, a circular polarizing (CPL) filter and a natural density (ND) filter...
May 13, 2017: Sensors
https://www.readbyqxmd.com/read/28504811/percutaneous-screw-fixation-for-scaphoid-fractures
#18
Mohamed E Al-Ashhab, Hossam El-Dein A Elbegawi
Treatment of nondisplaced scaphoid waist fractures has evolved from conventional cast immobilization to percutaneous screw insertion. This study assessed clinical and radiologic outcomes of volar percutaneous screw fixation for 15 type B2 scaphoid fractures (according to the Herbert and Fisher classification). All patients were followed for an average of 33 months (range, 6-50 months). All fractures achieved radiographic union at an average of 57 days (range, 35-70 days), requiring no additional procedures...
May 15, 2017: Orthopedics
https://www.readbyqxmd.com/read/28503753/distal-forearm-fracture-open-reduction-internal-fixation-sonographic-detection-of-hardware-malalignment-and-associated-tendon-injuries-missed-by-radiography
#19
Tara A Morgan, Samantha L Piper, Lisa L Lattanza, Ruth B Goldstein, Thomas Link, Daria Motamedi
Tendon injury is a known complication of distal radius fracture plate and screw fixation. Targeted musculoskeletal sonography is uniquely capable of assessing both tendon integrity and hardware abnormalities not recognized on radiographs. Each of the 3 patients described presented with pain after an open reduction-internal fixation following a distal forearm fracture. In each patient, radiographic findings, specifically the hardware position, were interpreted as normal. Important radiographically occult observations were subsequently made with sonography, including 3 proud screws and tendon injuries, all of which required surgical treatment...
May 15, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28503234/error-reporting-from-the-da-vinci-surgical-system-in-robotic-surgery-a-canadian-multispecialty-experience-at-a-single-academic-centre
#20
Emad Rajih, Côme Tholomier, Beatrice Cormier, Vanessa Samouëlian, Thomas Warkus, Moishe Liberman, Hugues Widmer, Jean-Baptiste Lattouf, Abdullah M Alenizi, Malek Meskawi, Roger Valdivieso, Pierre-Alain Hueber, Pierre I Karakewicz, Assaad El-Hakim, Kevin C Zorn
INTRODUCTION: The goal of the study is to evaluate and report on the third-generation da Vinci surgical (Si) system malfunctions. METHODS: A total of 1228 robotic surgeries were performed between January 2012 and December 2015 at our academic centre. All cases were performed by using a single, dual console, four-arm, da Vinci Si robot system. The three specialties included urology, gynecology, and thoracic surgery. Studied outcomes included the robotic surgical error types, immediate consequences, and operative side effects...
May 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
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