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https://www.readbyqxmd.com/read/29664613/advanced-materials-and-devices-for-bioresorbable-electronics
#1
Seung-Kyun Kang, Jahyun Koo, Yoon Kyeung Lee, John A Rogers
Recent advances in materials chemistry establish the foundations for unusual classes of electronic systems, characterized by their ability to fully or partially dissolve, disintegrate, or otherwise physically or chemically decompose in a controlled fashion after some defined period of stable operation. Such types of "transient" technologies may enable consumer gadgets that minimize waste streams associated with disposal, implantable sensors that disappear harmlessly in the body, and hardware-secure platforms that prevent unwanted recovery of sensitive data...
April 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29625689/spinopelvic-injuries-facts-and-controversies
#2
EDITORIAL
Enrique Guerado, Ana Maria Cervan, Juan Ramón Cano, Peter V Giannoudis
Spinopelvic injuries result from high energy trauma with overloading through the sacrum. These lesions can accomplish either bone fractures, ligament injuries or, most commonly, both. They may be accompanied with other associated life threatening injuries and cause biomechanical instability with potential fracture non-union, mal-union and subsequent lifetime pain and disability. Surgical stabilization of spinopelvic injuries requires planning in order to apply the appropriate osteosynthesis principles (compression; neutralization; buttressing and tension band)...
March 2018: Injury
https://www.readbyqxmd.com/read/29623358/a-non-invasive-method-to-collect-fecal-samples-from-wild-birds-for-microbiome-studies
#3
Sarah A Knutie, Kiyoko M Gotanda
Over the past few decades, studies have demonstrated that the gut microbiota strongly influences the physiology, behavior, and fitness of its host. Such studies have been conducted primarily in humans and model organisms under controlled laboratory conditions. More recently, researchers have realized the importance of placing host-associated microbiota studies into a more ecological context; however, few non-destructive methods have been established to collect fecal samples from wild birds. Here, we present an inexpensive and easy-to-use kit for the non-invasive collection of feces from small birds...
April 5, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29614489/hyperbaric-oxygen-therapy-as-adjuvant-treatment-for-hardware-related-infections-in-neuromodulation
#4
Jiri Bartek, Simon Skyrman, Michael Nekludov, Tiit Mathiesen, Folke Lind, Gaston Schechtmann
BACKGROUND: In neuromodulation therapies, hardware-related infections are a major challenge often leading to hardware removal. OBJECTIVE: To investigate the role of adjuvant hyperbaric oxygen therapy (HBOT) in hardware-related infections. METHODS: Fourteen hardware-related infection events in 12 consecutive patients between 2002 and 2015 were treated with antibiotics and adjuvant HBOT at the Karolinska University Hospital (Stockholm, Sweden)...
April 3, 2018: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/29609972/fixed-angle-plate-fixation-of-comminuted-patellar-fractures
#5
Tyler B Moore, Bharat R Sampathi, David P Zamorano, Martin C Tynan, John A Scolaro
INTRODUCTION: Comminuted patella fractures are uncommon and difficult fractures to manage. Multiple treatment modalities have been suggested, with little clinical data to support practice. Recent biomechanical and technical investigations have described successful plate fixation of comminuted patella fractures. The purpose of this study was to evaluate radiographic, clinical and functional outcome of comminuted patella fractures treated with a fixed angle locking plates. We believe stable fixation, which results in successful fracture union and functional recovery, can be achieved with this technique...
March 27, 2018: Injury
https://www.readbyqxmd.com/read/29606961/a-pruning-neural-network-model-in-credit-classification-analysis
#6
Yajiao Tang, Junkai Ji, Shangce Gao, Hongwei Dai, Yang Yu, Yuki Todo
Nowadays, credit classification models are widely applied because they can help financial decision-makers to handle credit classification issues. Among them, artificial neural networks (ANNs) have been widely accepted as the convincing methods in the credit industry. In this paper, we propose a pruning neural network (PNN) and apply it to solve credit classification problem by adopting the well-known Australian and Japanese credit datasets. The model is inspired by synaptic nonlinearity of a dendritic tree in a biological neural model...
2018: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/29596330/modeling-and-assessment-of-precise-time-transfer-by-using-beidou-navigation-satellite-system-triple-frequency-signals
#7
Rui Tu, Pengfei Zhang, Rui Zhang, Jinhai Liu, Xiaochun Lu
This study proposes two models for precise time transfer using the BeiDou Navigation Satellite System triple-frequency signals: ionosphere-free (IF) combined precise point positioning (PPP) model with two dual-frequency combinations (IF-PPP1) and ionosphere-free combined PPP model with a single triple-frequency combination (IF-PPP2). A dataset with a short baseline (with a common external time frequency) and a long baseline are used for performance assessments. The results show that IF-PPP1 and IF-PPP2 models can both be used for precise time transfer using BeiDou Navigation Satellite System (BDS) triple-frequency signals, and the accuracy and stability of time transfer is the same in both cases, except for a constant system bias caused by the hardware delay of different frequencies, which can be removed by the parameter estimation and prediction with long time datasets or by a priori calibration...
March 29, 2018: Sensors
https://www.readbyqxmd.com/read/29589953/ten-year-results-of-medial-open-wedge-high-tibial-osteotomy-and-chondral-resurfacing-in-severe-medial-osteoarthritis-and-varus-malalignment
#8
Philipp Schuster, Markus Geßlein, Michael Schlumberger, Philipp Mayer, Raul Mayr, Damian Oremek, Sebastian Frank, Martin Schulz-Jahrsdörfer, Jörg Richter
BACKGROUND: High tibial osteotomy (HTO) is a widely used treatment option for medial osteoarthritis and varus malalignment, especially in young patients with early osteoarthritis. Limited outcome data are available for this procedure in severe osteoarthritis, and no long-term data are available using newer implants. PURPOSE: To determine survivorship and functional results of medial open-wedge HTO combined with a chondral resurfacing (CR) procedure (abrasion plus microfracture) in severe medial osteoarthritis (Kellgren-Lawrence grade 3 and 4) and varus malalignment...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29576919/treatment-of-ulnar-impaction-syndrome-with-and-without-central-tfc-lesion
#9
Steffen Löw, Alexandra Herold, Frank Unglaub, Kai Megerle, Holger Erne
Background  Arthroscopic debridement of the triangular fibrocartilage (TFC) is well accepted in patients with ulnar impaction syndrome with central TFC lesions. Treatment remains controversial, however, when there is no such lesion from radiocarpal view. Purpose  This study assessed the clinical outcome of arthroscopic central TFC resection and debridement and secondary ulnar shortening in patients with ulnar impaction with central TFC lesion compared with patients without TFC lesion. Patients and Methods  Thirty-two consecutive patients with ulnar impaction syndrome were arthroscopically treated, 16 of whom had a central lesion of the TFC that was debrided...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29576918/nonspanning-total-wrist-arthrodesis-with-a-low-profile-locking-plate
#10
Schneider K Rancy, Eugene T Ek, Sophia Paul, Robert N Hotchkiss, Scott W Wolfe
Purpose  This study aims to compare the outcomes and complications of our technique for nonspanning total wrist arthrodesis using a locking plate with the standard carpometacarpal spanning technique. Methods  A retrospective review of charts was performed to identify patients who underwent total wrist arthrodesis by the senior author (S.W.W.). We compared the outcomes of 15 cases of nonspanning wrist fusion with a 2.4/2.7 mm locking T plate to 11 cases of spanning wrist fusion with a 2.7/3.5 mm locking compression plate...
April 2018: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/29576643/total-knee-arthroplasty-using-patient-specific-blocks-after-prior-femoral-fracture-without-hardware-removal
#11
Raju Vaishya, Vipul Vijay, Amit K Agarwal
Background: The options to perform total knee arthroplasty (TKA) with retained hardware in femur are mainly - removal of hardware, use of extramedullary guide, or computer-assisted surgery. Patient-specific blocks (PSBs) have been introduced with many potential advantages, but their use in retained hardware has not been adequately explored. The purpose of the present study was to outline and assess the usefulness of the PSBs in performing TKA in patients with retained femoral hardware...
March 2018: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/29572182/opening-wedge-high-tibial-osteotomy-performed-with-locking-plate-fixation-tomofix%C3%A2-and-early-weight-bearing-but-without-filling-the-defect-a-concise-follow-up-note-of-48-cases-at-10-years-follow-up
#12
M Darées, S Putman, T Brosset, T Roumazeille, G Pasquier, H Migaud
INTRODUCTION: Use of a locking plate during medial-opening high tibial osteotomy (HTO) eliminates the need to fill the defect and its associated complications. It also allows early weight bearing. Since long-term data with this type of construct are rare, we wanted to report the outcomes of a 51-patient cohort evaluated after a mean follow-up of 10.2 years. The goals were to determine 1) the HTO survival and whether the correction was maintained between 2 and 10 years later, 2) the stability of the functional outcomes, 3) the complication rate related to use of locking plates...
March 20, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29560369/high-tibial-osteotomy-performed-with-all-peek-implants-demonstrates-similar-outcomes-but-less-hardware-removal-at-minimum-2-year-follow-up-compared-with-metal-plates
#13
Troy A Roberson, Amit M Momaya, Kyle Adams, Catherine D Long, John M Tokish, Douglas J Wyland
Background: High tibial osteotomy (HTO) is a valuable treatment option in the high-demand patient with chondral damage and an altered mechanical axis. Traditional opening wedge HTO performed with metal plates has several limitations, including hardware irritation, obscuration of detail on magnetic resonance imaging, and complexity of revision surgery. Recently, an all-polyetheretherketone (PEEK) HTO implant was introduced, but no studies to date have evaluated the performance of this implant with minimum 2-year outcomes compared with a traditional metal plate...
March 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29560035/arthroscopically-assisted-latarjet-an-easy-and-reproducible-technique-for-improving-the-accuracy-of-graft-and-screw-placement
#14
Ettore Taverna, Vincenzo Guarrella, Roberto Cartolari, Henri Ufenast, Laura Broffoni, Christophe Barea, Guido Garavaglia
Background: The effectiveness of the Latarjet largely depends on accurate graft placement, as well as on proper position and direction of the screws. We present our technique for an arthroscopically-assisted Latarjet comparing radiological results with the open technique. Methods: We retrospectively reviewed the postoperative computed tomography scans of 38 patients who underwent a Latarjet procedure. For 16 patients, the procedure was performed with the open technique and, for 22 patients, it was performed using an arthroscopically-assisted technique...
April 2018: Shoulder & Elbow
https://www.readbyqxmd.com/read/29554354/application-of-lean-principles-to-neurosurgical-procedures-the-case-of-lumbar-spinal-fusion-surgery-a-literature-review-and-pilot-series
#15
Jesse J Liu, Jeffrey S Raskin, Fran Hardaway, Katherine Holste, Sarah Brown, Ahmed M Raslan
BACKGROUND: Delivery of higher value healthcare is an ultimate government and public goal. Improving efficiency by standardization of surgical steps can improve patient outcomes, reduce costs, and lead to higher value healthcare. Lean principles and methodology have improved timeliness in perioperative medicine; however, process mapping of surgery itself has not been performed. OBJECTIVE: To apply Plan/Do/Study/Act (PDSA) cycles methodology to lumbar posterior instrumented fusion (PIF) using lean principles to create a standard work flow, identify waste, remove intraoperative variability, and examine feasibility among pilot cases...
March 14, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29552412/fiber-pattern-removal-and-image-reconstruction-method-for-snapshot-mosaic-hyperspectral-endoscopic-images
#16
Pu Wang, Gianluca Turcatel, Cosimo Arnesano, David Warburton, Scott E Fraser, Francesco Cutrale
Hyperspectral endoscopic imaging has the potential to enhance clinical diagnostics and outcome. Most commercial endoscopes utilize imaging fiber bundles to transmit the collected signal from the patient to the medical operator. These bundles consist of several fiber cores surrounded by a cladding layer creating comb structure-like artifacts, which complicate further analysis, both spatially and spectrally. Here we present an optical fiber pattern removal algorithm which we applied to hyperspectral bronchoscopic images robustly and quantitatively without the need for specific optical or electrical hardware...
February 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29551527/isolated-medial-malleolus-fractures-conventional-techniques-versus-headless-compression-screw-fixation
#17
Tugrul Bulut, Merve Gursoy
The aim of the present study was to evaluate the clinical and radiologic results of surgically treated isolated medial malleolar fractures and compare the clinical and radiologic results of the fixation methods of headless cannulated fully threaded compression screws and cancellous lag screws and tension band wiring. We included 32 patients who attended the final follow-up examination. Group 1 consisted of 11 patients (34.4%) treated with headless cannulated fully threaded compression screws. Group 2 consisted of 10 patients (31...
March 15, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29544778/low-complexity-hardware-design-methodology-for-reliable-and-automated-removal-of-ocular-and-muscular-artifact-from-eeg
#18
Amit Acharyya, Pranit N Jadhav, Valentina Bono, Koushik Maharatna, Ganesh R Naik
BACKGROUND AND OBJECTIVE: EEG is a non-invasive tool for neuro-developmental disorder diagnosis and treatment. However, EEG signal is mixed with other biological signals including Ocular and Muscular artifacts making it difficult to extract the diagnostic features. Therefore, the contaminated EEG channels are often discarded by the medical practitioners which may result in less accurate diagnosis. Many existing methods require reference electrodes, which will create discomfort to the patient/children and cause hindrance to the diagnosis of the neuro-developmental disorder and Brain Computer Interface in the pervasive environment...
May 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29542338/affinity-enrichment-for-mass-spectrometry-improving-the-yield-of-low-abundance-biomarkers
#19
Brianna Kim, Robyn Araujo, Marissa Howard, Ruben Magni, Lance A Liotta, Alessandra Luchini
Mass spectrometry (MS) is the premier tool for discovering novel disease-associated protein biomarkers. Unfortunately, when applied to complex body fluid samples, MS has poor sensitivity for the detection of low abundance biomarkers (≪10 ng/mL), derived directly from the diseased tissue cells or pathogens. Areas covered: Herein we discuss the strengths and drawbacks of technologies used to concentrate low abundance analytes in body fluids, with the aim to improve the effective sensitivity for MS discovery...
March 22, 2018: Expert Review of Proteomics
https://www.readbyqxmd.com/read/29524244/simultaneous-auto-calibration-and-gradient-delays-estimation-sage-in-non-cartesian-parallel-mri-using-low-rank-constraints
#20
Wenwen Jiang, Peder E Z Larson, Michael Lustig
PURPOSE: To correct gradient timing delays in non-Cartesian MRI while simultaneously recovering corruption-free auto-calibration data for parallel imaging, without additional calibration scans. METHODS: The calibration matrix constructed from multi-channel k-space data should be inherently low-rank. This property is used to construct reconstruction kernels or sensitivity maps. Delays between the gradient hardware across different axes and RF receive chain, which are relatively benign in Cartesian MRI (excluding EPI), lead to trajectory deviations and hence data inconsistencies for non-Cartesian trajectories...
March 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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