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Zu-Jie Hu, Ming Li, Xing Liu, Chuan-Kang Liu
PURPOSE: To explore the advantages of palmar approach with Kirschner-wire (K-wire) fixation in the treatment of children's distal radius extension type fracture. METHODS: Thirty patients, average age of 8.5 years ranging from 5 to 13 years, with distal radius extension type fracture and undergoing a failed manual reposition in our hospital were included, and treated by palmar approach with K-wire fixation between May 2014 and December 2017. Among these patients (21 male and 9 female), 5 patients had chronic injuries over 10 days, and 6 patients had fracture of the distal radius epiphysis...
October 4, 2018: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
Supraja G Varadarajan, Andrew D Huberman
Vision is the sense humans rely on most to navigate the world and survive. A tremendous amount of research has focused on understanding the neural circuits for vision and the developmental mechanisms that establish them. The eye-to-brain, or 'retinofugal' pathway remains a particularly important model in these contexts because it is essential for sight, its overt anatomical features relate to distinct functional attributes and those features develop in a tractable sequence. Much progress has been made in understanding the growth of retinal axons out of the eye, their selection of targets in the brain, the development of laminar and cell type-specific connectivity within those targets, and also dendritic connectivity within the retina itself...
October 16, 2018: Current Opinion in Neurobiology
Alexander J Daniel, James A Smith, Glyn S Spencer, João Jorge, Richard Bowtell, Karen J Mullinger
Simultaneous EEG-fMRI allows multiparametric characterisation of brain function, in principle enabling a more complete understanding of brain responses; unfortunately the hostile MRI environment severely reduces EEG data quality. Simply eliminating data segments containing gross motion artefacts [MAs] (generated by movement of the EEG system and head in the MRI scanner's static magnetic field) was previously believed sufficient. However recently the importance of removal of all MAs has been highlighted and new methods developed...
October 19, 2018: Human Brain Mapping
Choirul Anam, Toshioh Fujibuchi, Wahyu Setia Budi, Freddy Haryanto, Geoff Dougherty
PURPOSE: The purpose of this study was to introduce a new algorithm for automated measurement of the modulation transfer function (MTF) using an edge of a readily available phantom and to evaluate the effect of reconstruction filter and field of view (FOV) on the spatial resolution in the CT images. METHODS: Our automated MTF measurement consisted of several steps. The center of the image was established and an appropriate region of interest (ROI) designated. The edge spread function (ESF) was determined, and a suitably interpolated ESF curve was differentiated to obtain the line spread function (LSF)...
October 19, 2018: Journal of Applied Clinical Medical Physics
Seyedeh Mahboobeh Yousefi, Farzaneh Shemirani, Sohrab Ali Ghorbanian
A graphene based bucky gel-coated stainless steel fiber was prepared and applied to headspace solid phase microextraction of volatile organic compounds. Graphene was mixed with an ionic liquid to produce a bucky gel that displays the attractive features of both compounds. It can be directly deposited on an etched stainless steel wire to give the fiber for use in extraction of benzene, toluene, ethylbenzene and xylene (BTEX) isomers. The presence of graphene favors the π-interaction between the sorbent and aromatic analytes...
October 18, 2018: Mikrochimica Acta
S T Rashid, N J Haywood, N Y Yuldasheva, J Smith, A Aziz, D J A Scott, M T Kearney, S B Wheatcroft
Introduction: Preservation of structural integrity of the endothelial monolayer and maintenance of endothelial cell function are of critical importance in preventing arterial thrombosis, restenosis and atherosclerosis. Obesity has been intimately linked with endothelial dysfunction, and reports of reduced abundance and functional impairment of circulating progenitor cells in obesity have led to the suggestion that defective endothelial repair contributes to obesity-related cardiovascular disease...
October 2018: Obesity Science & Practice
Jacob J Bundy, Ravi N Srinivasa, Rajiv N Srinivasa, Joseph J Gemmete, Anthony N Hage, Jeffrey Forris Beecham Chick
OBJECTIVE: The objective of this study was to determine the incidence of vascular and lymphatic complications after attempted transabdominal thoracic duct cannulation. METHODS: There were 58 patients who underwent attempted thoracic duct cannulation. Patients presented with chyle leak in the chest (n = 40), abdomen (n = 9), neck (n = 8), and pelvis (n = 1). Vertebral body level and geographic access, needle gauge, additional access for treatment, technical success, intervention performed, immediate and delayed complications, and follow-up duration were recorded...
November 2018: Journal of Vascular Surgery. Venous and Lymphatic Disorders
Luigi Manfredi, Alfred Cuschieri
Shape memory alloys (SMAs) are smart materials used in robotics because of its light weight and high force-to-weight ratio. The low energy efficiency, up to 5%, has limited their use for large actuators. However, they have shown advantages in the design of mini-robots because of the limited volume required for the actuation system. The present study reports the design and construction of a mini compliant joint (MCJ) with a 2 degrees of freedom (DOFs) intersecting axis. The MCJ prototype has a 20 mm external diameter surrounding a cavity of 8 mm, weighs 2 g, is 20 mm high and can perform an angle rotation of 30 ∘ in less than 260 ms...
October 17, 2018: Materials
Xinlei Shang, Chuandong Jiang, Zhongjun Ma, Shengwu Qin
Underground construction projects such as tunnel construction are at high risk of water-induced disasters. Because this type of disaster poses a serious threat to worker safety and productivity, instruments and methods that can accurately detect the water source are critical. In this study, a water detection instrument that combines Magnetic Resonance Sounding (MRS) and Time-domain Electromagnetic Method (TEM) techniques to yield a joint MRS-TEM interpretation method was developed for narrow underground spaces such as tunnels...
October 17, 2018: Sensors
Marius Bürkle, Yoshihiro Asai
While the Wiedemann-Franz law is known to be robust for many bulk materials, possible violations have been actively discussed for certain classes of bulk materials such as heavy Fermion materials. At nanoscale on the other hand the limits of the Wiedemann-Franz law and how to probe and control them remains an open question. Therefore, we propose here a systematic way to elucidate the limits of the Wiedemann-Franz law at nanoscale. Using first-principles calculations, we examine the Wiedemann-Franz law in nanoscale conductors, namely in gold and platinum-based atomic wires...
October 18, 2018: Nano Letters
S Glassner, H Keshmiri, D J Hill, J F Cahoon, B Fernandez, M I den Hertog, A Lugstein
The combination of Moore's law and Dennard's scaling rules have constituted the fundamental guidelines for the silicon-based semiconductor industry for decades. Furthermore, the enormous growth of global data volume has pushed the demand for complex and densely packed devices. In recent years, it has become clear that wired interconnects impose increasingly severe speed and power limitations onto integrated circuits as scaling slows toward a halt. To overcome these limitations, there is a clear need for optical data processing...
October 18, 2018: Nano Letters
Zhiqing Cao, Jiangyi Chen, Zhixiong Li, Guoxin Li
BACKGROUND: Pediatric inguinal hernia is one of the most common diseases in children, and laparoscopy is the main surgical method. This study aims to evaluate the efficacy of a new modified 2-port laparoscopic herniorrhaphy with Kirschner wire (TLHK) for inguinal hernia in children. METHODS: A total of 5304 children with inguinal hernia hospitalized at the Jiangmen Center Hospital from June 2003 to May 2016 were enrolled in this retrospective study. Four thousand one hundred thirty-five children underwent TLHK that comprised the observation group, while 1169 received single incision laparoscopy (SIL) as the control group (CG)...
October 2018: Medicine (Baltimore)
Anil Agarwal, Jonathan Reeg, Anthony S Podkowa, Michael L Oelze
In ultrasonic imaging, reduction of lateral sidelobes can result in an improved image with less distortion and fewer artifacts. In general, apodization is used to lower sidelobes in exchange for increasing the width of the mainlobe and thus decreasing lateral resolution. Null subtraction imaging (NSI) is a nonlinear image processing technique that uses different receive apodizations on copies of the same RF data to maintain low sidelobe levels while simultaneously improving lateral resolution. The images created with three different apodization functions are combined to form an image with low sidelobe levels and apparent improvements in lateral resolution compared to conventional rectangular apodization...
October 16, 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Sherif Dabash, Chris Gerzina, Gautham Prabhakar, Ahmed M Thabet, Soyoung Jeon, Stephen D Heinrich
PURPOSE: Supracondylar fractures in the pediatric population are common. For years, K-wires have been the preferred method of surgical fixation. However, fixation with K-wires alone may lead to multiple complications. This study reports the results of surgical care of supracondylar humerus fractures using screw fixation with K-wires or screw fixation alone. METHODS: This study retrospectively reviewed all patients with supracondylar humerus fractures treated with screw fixation between 2007 and 2013...
October 17, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Chun-Hui Tang, Gao-Wen Yao, Lin Wang, Wei Luo
OBJECTIVE: To evaluate the feasibility of internal and external fixation after open reduction combined with suture anchors to repair the intercarpal ligaments for the treatment of perilunate injury, and to explore its operative techniques and therapeutic efficacy. METHODS: From September 2012 to September 2016, 11 patients with perilunate injury were surgically treated with Kirschner wires in intercarpal articulations, 3.0 mm cannulated screws for scaphoid fracture, absorbable anchor for intercarpal ligament repair, together with fixators at intercarpal joints, among whom 6 suffered from perilunate dislocations and 5 from trans-scaphoid fracture dislocations...
September 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Hong-Ming Lin, Yi-Ping Ma, Cheng-Ting Hu, Zhi-Juan Zhou
OBJECTIVE: To explore the clinical effect of modified Metaizeau's technique for radial neck fractures of Judet II or IV in children, summarizing the value of clinical application. METHODS: From May 2014 to March 2017, 32 children of Judet III or IV radial neck fractures were treated with percutaneous Kirschner wire poking reduction and closed reduction with elastic intramedullary nailing fixation, including 21 boys and 11 girls, aged from 5.7 to 10.6 years old with a mean of 7...
September 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Xiermaimaiti Kadeer, Long Wang, Lei Zhang, Weirong Shi, Chang Chen
BACKGROUND: The localization of multiple pulmonary nodules is challenging due to a high incidence of pneumothorax after each needle insertion into lung parenchyma. The aim of the current study is to verify the safety and effectiveness of a modified technique utilizing simultaneous Hookwire placement to localize multiple lesions. METHODS: The proposed method comprises a row of metal wires, perpendicular insertion, simultaneous release of Hookwire, and a lateral position to modify a conventional localizing technique...
October 17, 2018: Journal of Surgical Oncology
Randy A McCool, Julie Springer
No abstract text is available yet for this article.
October 17, 2018: Archives of Gynecology and Obstetrics
Marco Bigoni, Massimiliano Piatti, Nicolò Zanchi, Massimo Gorla, Diego Gaddi, Luca Rigamonti, Robert J Omeljaniuk, Giovanni Zatti, Marco Turati
INTRODUCTION: Ideal treatment of acute acromioclavicular joint (ACJ) dislocation remains unresolved. We evaluated ACJ reconstruction using polyester tapes and temporary Kirschner wire (KW) and presented clinical and radiological outcomes. MATERIALS AND METHODS: Patients were retrospectively evaluated and classified according to Rockwood classification, clinical and sportive characteristics. Constant Score (CS) and ACJ joint instability (ACJI) score were collected...
October 16, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Eric Klein, Christian Gossler, Oliver Paul, Patrick Ruther
This study reports the realization of an optical cochlear implant (oCI) with optimized thermomechanical properties for optogenetic experiments. The oCI probe comprises 144 miniaturized light-emitting diodes (μLEDs) distributed along a bendable, 1.5-cm-long, 350-μm-wide and 26-μm-thick probe shaft, individually controlled via a n × p matrix interconnection. In contrast to our earlier approach based on polyimide (PI) and epoxy resin with different thermal expansion coefficients, the μLEDs and interconnecting wires are now embedded into a triple-layer stack of a single, biocompatible, and highly transparent epoxy material...
2018: Frontiers in Neuroscience
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