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https://www.readbyqxmd.com/read/28231653/implantless-fixation-of-a-large-osteocartilaginous-fracture-of-the-lateral-femoral-condyle-in-a-child
#1
Jitendra Maheshwari, Vikram Mhaskar, Parul Maheshwari Mhaskar
We describe for the first time a case of lateral femoral condyle fracture following a fall in a 13-year-old child that was reduced arthroscopically using a probe. It was definitively fixed with 0 vicryl sutures in a cruciate pattern after being initially stabilised with 1.5-mm Kirschner wires. Four beath pins carrying sutures were drilled at four opposing quadrants through the reduced fragment into the femur. The sutures were then tied on the lateral cortex of the femur. After fixation, the child was kept non-weight bearing for 6 weeks, partial weight bearing from 6 weeks to 12 weeks and then full weight bearing thereafter...
March 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28231639/cell-cycle-rna-regulons-coordinating-early-lymphocyte-development
#2
REVIEW
Alison Galloway, Martin Turner
Lymphocytes undergo dynamic changes in gene expression as they develop from progenitor cells lacking antigen receptors, to mature cells that are prepared to mount immune responses. While transcription factors have established roles in lymphocyte development, they act in concert with post-transcriptional and post-translational regulators to determine the proteome. Furthermore, the post-transcriptional regulation of RNA regulons consisting of mRNAs whose protein products act cooperatively allows RNA binding proteins to exert their effects at multiple points in a pathway...
February 23, 2017: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/28231250/corticospinal-excitability-measurements-using-transcranial-magnetic-stimulation-are-valid-with-intramuscular-electromyography
#3
Rebekah L S Summers, Mo Chen, Teresa J Kimberley
OBJECTIVES: Muscular targets that are deep or inaccessible to surface electromyography (sEMG) require intrinsic recording using fine-wire electromyography (fEMG). It is unknown if fEMG validly record cortically evoked muscle responses compared to sEMG. The purpose of this investigation was to establish the validity and agreement of fEMG compared to sEMG to quantify typical transcranial magnetic stimulation (TMS) measures pre and post repetitive TMS (rTMS). The hypotheses were that fEMG would demonstrate excellent validity and agreement compared with sEMG...
2017: PloS One
https://www.readbyqxmd.com/read/28230910/adhesives-for-bonded-molar-tubes-during-fixed-brace-treatment
#4
REVIEW
Declan T Millett, Nicky A Mandall, Rye Cr Mattick, Joy Hickman, Anne-Marie Glenny
BACKGROUND: Orthodontic treatment involves using fixed or removable appliances (dental braces) to correct the positions of teeth. The success of a fixed appliance depends partly on the metal attachments (brackets and bands) being glued to the teeth so that they do not become detached during treatment. Brackets (metal squares) are usually attached to teeth other than molars, where bands (metal rings that go round each tooth) are more commonly used. Orthodontic tubes (stainless steel tubes that allow wires to pass through them), are typically welded to bands but they may also be glued directly (bonded) to molars...
February 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28228627/orthodontic-archwire-composition-and-phase-analyses-by-neutron-spectroscopy
#5
Kun V Tian, Giulia Festa, Francesco Basoli, Giuseppina Laganà, Antonella Scherillo, Carla Andreani, Patrizio Bollero, Silvia Licoccia, Roberto Senesi, Paola Cozza
Quantitative metallurgical and phase analyses employing neutron diffraction technique were conducted on two as-received commercial rectangular austenitic stainless steel orthodontic archwires, G&H and Azdent, 0.43×0.64 mm (0.017×0.025 inch). Results showed a bi-phase structure containing martensitic phase (45.67% for G&H and 6.62% for Azdent) in addition to the expected metastable austenite. The former may be a strain-induced phase-transformation arising during the cold working process of wire fabrication...
February 22, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28228445/-osteotropic-wnt-lrp-signals-high-wire-artists-in-a-balancing-act-regulating-aortic-structure-and-function
#6
EDITORIAL
Dwight A Towler
No abstract text is available yet for this article.
March 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28227997/an-autoclavable-wireless-palpation-instrument-for-minimally-invasive-surgery
#7
Anish S Naidu, Abelardo Escoto, Omar Fahmy, Rajni V Patel, Michael D Naish, Anish S Naidu, Abelardo Escoto, Omar Fahmy, Rajni V Patel, Michael D Naish, Abelardo Escoto, Omar Fahmy, Michael D Naish, Anish S Naidu, Rajni V Patel
Minimally invasive surgery prevents surgeons from manually palpating organs to locate subsurface tumors and other structures. One solution is to use ultrasound; however, it is not always reliable. Various minimally invasive surgery instruments that provide tactile feedback have been proposed to augment ultrasound sensing for tumor localization; however, current designs have limitations such as cumbersome wiring, difficulty in manipulation, lack of sterilizability and high cost. This paper presents a novel, autoclavable, wireless, hand-held palpation instrument that uses a custom, low-cost, disposable tactile sensor to provide tactile and kinesthetic force feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227993/modeling-fiber-like-conductivity-structures-via-the-boundary-element-method-using-thin-wire-approximation-i-construction-of-basis-functions
#8
Sergey N Makarov, Alvaro Pascual-Leone, Aapo Nummenmaa, Sergey N Makarov, Alvaro Pascual-Leone, Aapo Nummenmaa, Aapo Nummenmaa, Sergey N Makarov, Alvaro Pascual-Leone
A set of one-dimensional basis functions is proposed and tested in order to model a thin homogeneous fiber of a higher conductivity within a medium with a lower conductivity. This set allows us to greatly speed up computations while keeping a good accuracy for the total fiber current and the resulting charge distribution averaged over the fiber cross-section.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227950/designing-and-testing-a-wearable-wireless-fnirs-patch
#9
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Manob Jyoti Saikia, Kunal Mankodiya, Gozde Cay, Mohammadreza Abtahi
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227936/radio-frequency-induced-heating-of-an-insulated-wire-during-magnetic-resonance-imaging
#10
Mikhail Kozlov, Gregor Schaefers, Mikhail Kozlov, Gregor Schaefers, Gregor Schaefers, Mikhail Kozlov
Radio frequency (RF) induced power deposition near straight insulated leads excited by different incident electrical field profiles was investigated. 3-D electromagnetic (EM) simulations were used to obtain implant models as well as RF-induced power depositions calculated as the integral of power loss density. For the investigated setups up to 400% discrepancy between the implant model predictions and EM simulation values was observed.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227688/development-of-a-finger-like-mechanism-of-end-effector-for-micro-surgery
#11
S M Kim, C M Park, J H Yoo, K Kim, S M Kim, C M Park, J H Yoo, K Kim, J H Yoo, K Kim, C M Park, S M Kim
Neurosurgery had been considered nearly impossible due to its technical difficulty and the danger to its special target organ, but with endoscopic methods, many such surgeries can be made safely through the nose. Endoscopic neurosurgery is limited by available instruments, however, and there remain some areas of the human body inaccessible to standard surgical tools. To overcome some of these limitations, in this study we developed a simple mechanism that could form a high curvature in a narrow space. The end product is a finger-like mechanism consisting of five body parts and four joints...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227687/characteristic-of-a-force-sensing-guide-wire-for-minimally-invasive-cardiac-surgery
#12
N Stefanova, M Hessinger, T Opitz, R Werthschutzky, N Stefanova, M Hessinger, T Opitz, R Werthschutzky, N Stefanova, M Hessinger, T Opitz
In minimal invasive cardiac surgery (MICS), the surgeon is missing haptic feedback of the guide wire for navigation through the vessels. A wide range of guide wires with various properties and performance characteristics are available to reduce the risk of complications during the intervention. This paper presents a force sensing guide wire for cardiac catheterization, which provides the surgeon a haptic feedback on the guide wire tip. Three conventional wires for the recanalization of chronic total coronary occlusions (CTO) are investigated and general design requirements for the force sensing guide wire are determined...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227683/artsens-%C3%A2-mobile-a-portable-image-free-platform-for-automated-evaluation-of-vascular-stiffness
#13
Malay Ilesh Shah, Jayaraj Joseph, T Aryasree, Mohanasankar Sivaprakasam, Malay Ilesh Shah, Jayaraj Joseph, T Aryasree, Mohanasankar Sivaprakasam, T Aryasree, Mohanasankar Sivaprakasam, Jayaraj Joseph, Malay Ilesh Shah
Vascular stiffness is a key physiological marker significant in screening and early diagnosis of vascular disease. However, state of art techniques for vascular stiffness evaluation are not suited for field deployment. We present ARTSENS(®) Mobile, a portable, image-free ultrasound technology platform for automated evaluation of carotid artery stiffness, amenable for field deployment. The technology utilises a single element ultrasound transducer operated in pulse echo modality to investigate arterial wall dynamics, assisted by intelligent algorithms for wall identification and motion tracking to completely automate the measurement...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227600/modeling-the-debye-dielectric-response-in-the-time-domain-for-a-liquid-crystal-based-biopotential-optrode
#14
Hrishikesh Srinivas, Amr Al Abed, Francois Ladouceur, Nigel H Lovell, Leonardo Silvestri, Hrishikesh Srinivas, Amr Al Abed, Francois Ladouceur, Nigel H Lovell, Leonardo Silvestri, Hrishikesh Srinivas, Nigel H Lovell, Francois Ladouceur, Leonardo Silvestri, Amr Al Abed
Multielectrode arrays (MEAs) are widely used for recording biopotentials, with an ongoing research effort to improve their characteristics and performance. In this spirit, we are currently investigating a novel concept for a liquid crystal-based optical electrode (optrode) that has the potential to overcome some of the limitations of MEAs, including that of wiring complexity. In this paper we present a model to fully describe the electrical response of the proposed optrode to biopotentials, taking into account dielectric relaxation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227586/inductive-power-transmission-to-millimeter-sized-biomedical-implants-using-printed-spiral-coils
#15
Ahmed Ibrahim, Mehdi Kiani, Ahmed Ibrahim, Mehdi Kiani, Ahmed Ibrahim, Mehdi Kiani
The operation frequency (f) has been a key parameter in optimizing wireless power transmission links for biomedical implants with millimeter (mm) dimensions. This paper studies the feasibility of using printed spiral coils (PSCs) for powering mm-sized implants with high power transmission efficiency (PTE) at different fps. Compared to wire-wound coils (WWCs), using a PSC in the implant side allows batch fabrication on rigid or flexible substrates, which can also be used as a platform for integrating implant components...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227511/toward-a-distributed-free-floating-wireless-implantable-neural-recording-system
#16
Pyungwoo Yeon, Xingyuan Tong, Byunghun Lee, Abdollah Mirbozorgi, Bruce Ash, Helmut Eckhardt, Maysam Ghovanloo, Pyungwoo Yeon, Xingyuan Tong, Byunghun Lee, Abdollah Mirbozorgi, Bruce Ash, Helmut Eckhardt, Maysam Ghovanloo, Maysam Ghovanloo, Byunghun Lee, Bruce Ash, Xingyuan Tong, Pyungwoo Yeon, Abdollah Mirbozorgi, Helmut Eckhardt
To understand the complex correlations between neural networks across different regions in the brain and their functions at high spatiotemporal resolution, a tool is needed for obtaining long-term single unit activity (SUA) across the entire brain area. The concept and preliminary design of a distributed free-floating wireless implantable neural recording (FF-WINeR) system are presented, which can enabling SUA acquisition by dispersedly implanting tens to hundreds of untethered 1 mm(3) neural recording probes, floating with the brain and operating wirelessly across the cortical surface...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227506/a-pdms-based-optical-waveguide-for-transcutaneous-powering-of-microelectrode-arrays
#17
Ali Ersen, Mesut Sahin, Ali Ersen, Mesut Sahin, Ali Ersen, Mesut Sahin
Implantable microelectrode arrays (MEAs) usually have on-site electronics that need to be powered, both in neural recording and stimulation applications. Interconnecting wires between implanted electrodes and the outside world constitute a major source of complications. Our solution to this tethering problem is to design a light waveguide that can collect the optical power transcutaneously and transmit it to the microelectrode array where it is to be converted to an electric current. A polydimethylsiloxane (PDMS)-based waveguide was fabricated and its attenuation was measured in vitro and found to be 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227102/a-flexible-parylene-probe-for-in-vivo-recordings-from-multiple-subregions-of-the-rat-hippocampus
#18
Huijing Xu, Ahuva Weltman, Min-Chi Hsiao, Kee Scholten, Ellis Meng, Theodore W Berger, Dong Song, Huijing Xu, Ahuva Weltman, Min-Chi Hsiao, Kee Scholten, Ellis Meng, Theodore W Berger, Dong Song, Ellis Meng, Dong Song, Min-Chi Hsiao, Theodore W Berger, Ahuva Weltman, Kee Scholten, Huijing Xu
The hippocampus is crucial to the formation of long-term memory and declarative memory. It is divided into three sub-fields the CA1, the CA3 and the DG. To understand the neuronal circuitry within the hippocampus and to study the role of the hippocampus in memory function requires the collection of neural activities from multiple subregions of the hippocampus simultaneously. Micro-wire electrode arrays are commonly used as an interface with neural systems. However, recording from multiple deep brain regions with curved anatomical structures such as the thin cell body layers of the hippocampus requires the micro-wires to be arranged into a highly accurate, complex layout that is difficult to fabricated manually...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226943/using-liquid-metal-alloy-egain-to-electrochemically-enhance-ss-stimulation-electrodes-for-biobotic-applications
#19
Tahmid Latif, Fengyuan Gong, Michael Dickey, Mihail Sichitiu, Alper Bozkurt, Tahmid Latif, Fengyuan Gong, Michael Dickey, Mihail Sichitiu, Alper Bozkurt, Michael Dickey, Tahmid Latif, Fengyuan Gong, Alper Bozkurt, Mihail Sichitiu
Biobotics is an emerging and useful advent in the field of robotics which harnesses the mechanical power of live invertebrates and benefits from them as "working" animals. Most biobotic applications rely on neural or muscular stimulation through implanted electrodes for achieving direct control of their locomotory behavior. Degradation of stimulation efficiency is often noticed through extended usage, partly owing to incompatibility of implanted electrodes to the application. Our previous achievements in biobotics utilized commercially available stainless steel wires as stimulation electrodes due to its availability and lower cost...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226916/a-pressure-and-shear-sensing-liner-for-prosthetic-sockets
#20
Jason Wheeler, Anirban Mazumdar, Lisa Marron, Kevin Dullea, Joan Sanders, Kate Allyn, Jason Wheeler, Anirban Mazumdar, Lisa Marron, Kevin Dullea, Joan Sanders, Kate Allyn, Kevin Dullea, Joan Sanders, Kate Allyn, Anirban Mazumdar, Lisa Marron, Jason Wheeler
Interface pressures are closely related to the comfort and fit of a lower-limb prosthetic socket and clinicians and researchers are interested in monitoring these loads. In particular, shear stresses at the socket/liner interface are indicative of important fit characteristics but are difficult to measure in situ. We have developed an elastomeric liner with sixteen integrated pressure and shear sensors, along with necessary wiring and data acquisition electronics. The sensors measure three-axis pressures using optical emitter/detector pairs coupled with transparent and opaque elastomeric layers...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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