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https://www.readbyqxmd.com/read/28098742/does-transection-of-the-c2-nerve-roots-during-c1-lateral-mass-screw-placement-for-atlantoaxial-fixation-result-in-a-superior-outcome-a-systematic-review-of-the-literature-and-meta-analysis
#1
Jetan H Badhiwala, Farshad Nassiri, Christopher D Witiw, Alireza Mansouri, Saleh A Almenawer, Michael G Fehlings
STUDY DESIGN: Systematic review and meta-analysis. OBJECTIVE: To evaluate the clinical and functional outcomes of transection of the C2 roots during C1 lateral mass screw placement for atlantoaxial fixation. SUMMARY OF BACKGROUND DATA: Transection of the C2 nerve roots has been recommended during atlantoaxial fixation to facilitate C1 lateral mass screw placement and possibly reduce post-operative occipital neuralgia, although this practice remains controversial...
January 16, 2017: Spine
https://www.readbyqxmd.com/read/28098733/preventing-pupillary-capture-after-vitrectomy-and-transscleral-fixation-of-an-intraocular-lens-iridotomy-using-a-vitrectomy-probe
#2
Dae Yune Kim, Hyung Bin Lim, Tae Seen Kang, Jung Yeul Kim
PURPOSE: To investigate the effects of concurrent iridotomy using a vitreous cutter probe on the prevention of pupillary capture in patients undergoing transscleral fixation of intraocular lens implantation. METHODS: A total of 79 eyes from 79 patients, who underwent transscleral fixation of intraocular lens without preexisting vitreoretinal disorders and who were followed up for 6 months were included. Subjects were divided into a noniridotomy group (51 eyes) and an iridotomy group (28 eyes)...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28098708/intramedullary-fixation-of-clavicle-fractures-anatomy-indications-advantages-and-disadvantages
#3
Robert J Neviaser
No abstract text is available yet for this article.
February 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28098705/heterotopic-ossification-in-acetabular-fracture-surgery
#4
Reza Firoozabadi, Timothy Alton, Henry Claude Sagi
Heterotopic ossification (HO) is a common complication of the surgical treatment of acetabular fractures. HO is the formation of trabecular bone in soft tissues where bone does not usually occur. Over the last decade, many risk factors have been identified for HO after surgical fixation of acetabular fractures; however, prophylaxis and treatment of this condition are controversial. Potential preventive measures range from NSAIDs to external beam irradiation, but recent studies have questioned the utility of these measures...
February 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28098521/semantic-and-syntactic-associations-during-word-search-modulate-the-relationship-between-attention-and-subsequent-memory
#5
Wei Zhou, Fei Mo, Yunhong Zhang, Jinhong Ding
Two experiments were conducted to investigate how linguistic information influences attention allocation in visual search and memory for words. In Experiment 1, participants searched for the synonym of a cue word among five words. The distractors included one antonym and three unrelated words. In Experiment 2, participants were asked to judge whether the five words presented on the screen comprise a valid sentence. The relationships among words were sentential, semantically related or unrelated. A memory recognition task followed...
January 2017: Journal of General Psychology
https://www.readbyqxmd.com/read/28098244/stochastic-evolution-in-populations-of-ideas
#6
Robin Nicole, Peter Sollich, Tobias Galla
It is known that learning of players who interact in a repeated game can be interpreted as an evolutionary process in a population of ideas. These analogies have so far mostly been established in deterministic models, and memory loss in learning has been seen to act similarly to mutation in evolution. We here propose a representation of reinforcement learning as a stochastic process in finite 'populations of ideas'. The resulting birth-death dynamics has absorbing states and allows for the extinction or fixation of ideas, marking a key difference to mutation-selection processes in finite populations...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097724/unphosphorylated-eiia-ntr-induces-clpap-mediated-degradation-of-rpos-in-azotobacter-vinelandii
#7
Luis Felipe Muriel-Millán, Soledad Moreno, Ramsés Gallegos-Monterrosa, Guadalupe Espín
The nitrogen-related phosphotransferase system (PTS(Ntr) ) is composed of the EI(Ntr) , NPr and EIIA(Ntr) proteins that form a phosphorylation cascade from phosphoenolpyruvate. PTS(Ntr) is a global regulatory system present in most Gram-negative bacteria that controls some pivotal processes such as potassium and phosphate homeostasis, virulence, nitrogen fixation and ABC transport activation. In the soil bacterium Azotobacter vinelandii, unphosphorylated EIIA(Ntr) negatively regulates the expression of genes related to the synthesis of the bioplastic polyester poly-β-hydroxybutyrate (PHB) and cyst-specific lipids alkylresorcinols (ARs)...
January 18, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28097387/all-dual-mobility-cups-are-not-the-same
#8
Thierry Aslanian
PURPOSE: Although the natural history of dual mobility has been exclusively borne for 20 years by a single company (due to industrial ownership), the concept has undeniably been very widely popularised with nearly 40 cups on the French market which should be regarded as a weight bearing surface, both broadly and in their own right. However, within the same original idea, these implants are not all identical (design, material, fixation ect.).The aim of this work is to propose a classification of different dual mobility cups by distinguishing between thegeneral characteristics of a conventional cup and those particular to this type of implant...
January 18, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28097249/application-of-a-3d-custom-printed-patient-specific-spinal-implant-for-c1-2-arthrodesis
#9
Kevin Phan, Alessandro Sgro, Monish M Maharaj, Paul D'Urso, Ralph J Mobbs
The study aims to describe a three-dimensional printed (3DP) posterior fixation implant used for C1/C2 fusion in a 65-year-old female. Spinal fusion remains a common intervention for a range of spinal pathologies including degenerative disc and facet disease when conservative methods are unsuccessful. However, fusion devices are not always entirely efficacious in providing the desired fixation, and surgeons rely on 'off the shelf' implants which may not provide an anatomical fit to address the particular pathology...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097243/range-of-motion-sacral-screw-and-rod-strain-in-long-posterior-spinal-constructs-a-biomechanical-comparison-between-s2-alar-iliac-screws-with-traditional-fixation-strategies
#10
Chester E Sutterlin, Antony Field, Lisa A Ferrara, Andrew L Freeman, Kevin Phan
BACKGROUND: S1 screw failure and L5/S1 non-union are issues with long fusions to S1. Improved construct stiffness and S1 screw offloading can help avoid this. S2AI screws have shown to provide similar stiffness to iliac screws when added to L3-S1 constructs. We sought to examine and compare the biomechanical effects on an L2-S1 pedicle screw construct of adding S2AI screws, AxiaLIF, L5-S1 interbody support via transforaminal lumbar interbody fusion (TLIF), and to examine the effect of the addition of cross connectors to each of these constructs...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097242/anterior-to-psoas-atp-fusion-of-the-lumbar-spine-evolution-of-a-technique-facilitated-by-changes-in-equipment
#11
Cristian Gragnaniello, Kevin Seex
BACKGROUND: Lateral interbody cages have been proven useful in spinal fusions. Spanning both lateral cortical rims while sparing the Anterior Longitudinal Ligament, the lateral interbody cages restore and maintain disc height while adding stability prior to supplemental fixation. The standard approach for their insertion is by a 90-degree lateral transpsoas method. This is relatively bloodless compared to other techniques although has its limitations, requiring neuro-monitoring and being, at times, very difficult at L4/5 due to iliac crest obstruction or an anterior plexus position...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28097111/fucntional-and-radiological-outcome-of-surgical-management-of-acetabular-fractures-in-tertiary-care-hospital
#12
Faizan Iqbal, Intikhab Taufiq, Muhammad Kazim Raheem Najjad, Naveed Khan, Osama Bin Zia
PURPOSE: Acetabular fractures are mainly caused by trauma and the incidence is rising in developing countries. Initially these fractures were managed conservatively, due to lack of specialized and dedicated acetabulum surgery centres. Our aim is to study the radiological and functional outcomes of surgical management of acetabular fractures in tertiary care hospital. MATERIALS AND METHODS: Total 50 patients were enrolled. The patients with acetabular fractures were enrolled between the years 2012 to 2014...
December 2016: Hip & Pelvis
https://www.readbyqxmd.com/read/28096624/genetic-variability-and-discrimination-of-low-doses-of-toxocara-spp-from-public-areas-soil-inferred-by-loop-mediated-isothermal-amplification-assay-as-a-field-friendly-molecular-tool
#13
Maryam Ozlati, Adel Spotin, Abbas Shahbazi, Mahmoud Mahami-Oskouei, Teimour Hazratian, Mohammad Adibpor, Ehsan Ahmadpour, Afsaneh Dolatkhah, Paria Khoshakhlagh
ABSTRACT: Aim: One of the main diagnostic problems of conventional polymerase chain reaction (PCR) is indiscrimination of low parasitic loads in soil samples. The aim of this study is to determine the genetic diversity and identification of Toxocara spp. from public areas soil inferred by loop-mediated isothermal amplification (LAMP) assay. MATERIALS AND METHODS: A total of 180 soil samples were collected from various streets and public parks of northwest Iran. The DNA of recovered Toxocara eggs were extracted and amplified by PCR and LAMP following ZnSO4 flotation technique...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28096499/when-eye-movements-express-memory-for-old-and-new-scenes-in-the-absence-of-awareness-and-independent-of-hippocampus
#14
Christine N Smith, Larry R Squire
Eye movements can reflect memory. For example, participants make fewer fixations and sample fewer regions when viewing old versus new scenes (the repetition effect). It is unclear whether the repetition effect requires that participants have knowledge (awareness) of the old-new status of the scenes or if it can occur independent of knowledge about old-new status. It is also unclear whether the repetition effect is hippocampus-dependent or hippocampus-independent. A complication is that testing conscious memory for the scenes might interfere with the expression of unconscious (unaware), experience-dependent eye movements...
February 2017: Learning & Memory
https://www.readbyqxmd.com/read/28096449/specific-glucoside-transporters-influence-septal-structure-and-function-in-the-filamentous-heterocyst-forming-cyanobacterium-anabaena-sp-strain-pcc-7120
#15
Mercedes Nieves-Morión, Sigal Lechno-Yossef, Rocío López-Igual, José E Frías, Vicente Mariscal, Dennis J Nürnberg, Conrad W Mullineaux, C Peter Wolk, Enrique Flores
: When deprived of combined nitrogen, some filamentous cyanobacteria contain two cell types: vegetative cells that fix CO2 through oxygenic photosynthesis and heterocysts that are specialized in N2 fixation. In the diazotrophic filament, the vegetative cells provide the heterocysts with reduced carbon (mainly in the form of sucrose) and heterocysts provide the vegetative cells with combined nitrogen. Septal junctions traverse peptidoglycan through structures known as nanopores, and appear to mediate intercellular molecular transfer that can be traced with fluorescent markers, including the sucrose analog esculin (a coumarin glucoside) that is incorporated into the cells...
January 17, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28095870/comparison-of-compressive-forces-caused-by-various-cannulated-cancellous-screws-used-in-arthroscopic-ankle-arthrodesis
#16
Satoshi Kamijo, Tsukasa Kumai, Shogo Tanaka, Tsuyoshi Mano, Yasuhito Tanaka
BACKGROUND: When performing arthroscopic ankle arthrodesis for end-stage ankle arthritis, internal fixation is performed using bone screws after appropriate preparation. However, optimal characteristics of bone screws have not been examined in terms of pressure force. Objective comparisons of bone-screw performance may provide information on procedures for arthroscopic ankle arthrodesis. The study objectives were to determine whether it was possible to measure compressive force changes using the newly developed device and to infer all screw characteristics from measurement results when used in actual surgeries...
January 17, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28095766/clamping-of-fine-kirschner-wires-in-external-fixators
#17
Ahmad R Zamani, S Olutunde Oyadiji
In Ilizarov circular (ring) external fixators, fine Kirschner wires are used to fix the bone to the fixator. Clamping of the wires to the rings with different bolt torques has been studied. However, the relation between the bolt torque and the fixation load applied to the wire was not investigated. In this work, finite element method is used to address this problem. Here, a fully three-dimensional model of the wire fixation assembly was built, with geometric details like threads on the bolt to produce a realistic simulation of the clamping of the wire...
November 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28095478/evaluating-silent-reading-performance-with-an-eye-tracking-system-in-patients-with-glaucoma
#18
Noriaki Murata, Daiki Miyamoto, Tetsuya Togano, Takeo Fukuchi
OBJECTIVE: To investigate the relationship between silent reading performance and visual field defects in patients with glaucoma using an eye tracking system. METHODS: Fifty glaucoma patients (Group G; mean age, 52.2 years, standard deviation: 11.4 years) and 20 normal controls (Group N; mean age, 46.9 years; standard deviation: 17.2 years) were included in the study. All participants in Group G had early to advanced glaucomatous visual field defects but better than 20/20 visual acuity in both eyes...
2017: PloS One
https://www.readbyqxmd.com/read/28095175/evaluation-of-the-droplet-microarray-platform-for-high-throughput-screening-of-suspension-cells
#19
Anna A Popova, Claire Depew, Katya Manuella Permana, Alexander Trubitsyn, Ravindra Peravali, Jorge Ángel González Ordiano, Markus Reischl, Pavel A Levkin
Phenotypic cell-based high-throughput screenings play a central role in drug discovery and toxicology. The main tendency in cell screenings is the increase of the throughput and decrease of reaction volume in order to accelerate the experiments, reduce the costs, and enable screenings of rare cells. Conventionally, cell-based assays are performed in microtiter plates, which exist in 96- to 1536-wells formats and cannot be further miniaturized. In addition, performing screenings of suspension cells is associated with risk of losing cell content during the staining procedures and incompatibility with high-content microscopy...
November 1, 2016: Journal of Laboratory Automation
https://www.readbyqxmd.com/read/28094860/tta-rapid-in-the-treatment-of-the-canine-cruciate-deficient-stifle-short-and-medium-term-outcome
#20
S J Butterworth, D M Kydd
OBJECTIVES: To evaluate complications, short- and medium-term outcomes following treatment of lameness associated with cranial cruciate ligament insufficiency in dogs using the "TTA-Rapid" technique. METHODS: Patient records from two veterinary clinics were retrospectively examined to collect data from cases treated over a period of 21 months. An owner postal questionnaire using a clinical metrology instrument (Liverpool Osteoarthritis in Dogs) evaluated medium-term outcome of at least six months...
January 2017: Journal of Small Animal Practice
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