keyword
MENU ▼
Read by QxMD icon Read
search

buckle

keyword
https://www.readbyqxmd.com/read/28331284/a-retrospective-study-comparing-outcomes-of-primary-rhegmatogenous-retinal-detachment-repair-by-scleral-buckling-and-pars-plana-vitrectomy-in-finland
#1
Sari Sahanne, Raimo Tuuminen, Jari Haukka, Sirpa Loukovaara
BACKGROUND: Rhegmatogenous retinal detachment (RRD) is the most common form of retinal detachment and an ophthalmic emergency. Here, we compared outcomes of primary RRD eyes operated with conventional scleral buckling (SB) with cryoretinopexy to those operated with standard pars plana vitrectomy (PPV). METHODS: This is an institutional, retrospective, register-based, observational, comparative study. Based on the surgical procedure, 319 eyes of 319 patients were divided into two groups: SB plus cryotherapy (n=50) and PPV (n=269)...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28325857/treatment-trends-for-retinopathy-of-prematurity-in-the-uk-active-surveillance-study-of-infants-at-risk
#2
Gillian G W Adams, Catey Bunce, Wen Xing, Lucilla Butler, Vernon Long, Aravind Reddy, Annegret H Dahlmann-Noor
OBJECTIVES: To estimate the incidence of severe retinopathy of prematurity (ROP) requiring treatment and describe current treatment patterns in the UK. DESIGN: Nationwide population-based case ascertainment study via the British Ophthalmic Surveillance Unit and a national collaborative ROP special interest group. Practitioners completed a standardised case report form (CRF). SETTING: All paediatric ophthalmologists providing screening and/or treatment for retinopathy in the UK were invited to take part...
March 21, 2017: BMJ Open
https://www.readbyqxmd.com/read/28324242/numerical-insights-into-the-phase-diagram-of-p-atic-membranes-with-spherical-topology
#3
A G Hansen, N Ramakrishnan, P B Sunil Kumar, J H Ipsen
The properties of self-avoiding p-atic membranes restricted to spherical topology have been studied by Monte Carlo simulations of a triangulated random surface model. Spherically shaped p-atic membranes undergo a Kosterlitz-Thouless transition as expected with topology induced mutually repelling disclinations of the p-atic ordered phase. For flexible membranes the phase behaviour bears some resemblance to the spherically shaped case with a p-atic disordered crumpled phase and p-atic ordered, conformationally ordered (crinkled) phase separated by a KT-like transition with proliferation of disclinations...
March 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28318004/the-conflicting-role-of-buckled-structure-in-phonon-transport-of-2d-group-iv-and-group-v-materials
#4
Bo Peng, Dequan Zhang, Hao Zhang, Hezhu Shao, Gang Ni, Yongyuan Zhu, Heyuan Zhu
Controlling heat transport through material design is one important step toward thermal management in 2D materials. To control heat transport, a comprehensive understanding of how structure influences heat transport is required. It has been argued that a buckled structure is able to suppress heat transport by increasing the flexural phonon scattering. Using a first principles approach, we calculate the lattice thermal conductivity of 2D mono-elemental materials with a buckled structure. Somewhat counterintuitively, we find that although 2D group-V materials have a larger mass and higher buckling height than their group-IV counterparts, the calculated κ of blue phosphorene (106...
March 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28302354/quadrant-analysis-of-quantitative-computed-tomography-scans-of-the-femoral-neck-reveals-superior-region-specific-weakness-in-young-and-middle-aged-men-with-type-1-diabetes-mellitus
#5
Takuma Kuroda, Koji Ishikawa, Takashi Nagai, Tomoyasu Fukui, Tsutomu Hirano, Katsunori Inagaki
We have previously shown that the intertrochanter of young and middle-aged patients with type 1 diabetes mellitus (T1DM) showed higher buckling ratio (an index of cortical instability) and lower volumetric bone mineral density (vBMD). However, we have not yet reported the detailed findings regarding the mechanical and density properties of the femoral neck. Therefore, we present a subanalysis of our previous study with the aim of further evaluating the middle third of the femoral neck via quadrant quantitative computed tomography in young and middle-aged patients with T1DM...
March 13, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28299011/management-of-giant-retinal-tear-detachments
#6
REVIEW
Maria H Berrocal, Megan L Chenworth, Luis A Acaba
Giant retinal tears (GRTs) are full-thickness circumferential tears of more than 90 degrees of the retina that are associated with vitreous detachment. They are related to ocular trauma, high myopia, aphakia, pseudophakia, genetic mutations involving collagen and young age. GRTs comprise 1.5% of all rhegmatogenous retinal detachments and the average age of incidence is 42 years. GRTs are more common in males, as 72% of all cases occur in males. The incidence of GRTs in the general population is estimated to be 0...
January 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28298863/scleral-buckle-infection-by-serratia-species
#7
Ramesh Venkatesh, Manisha Agarwal, Shalini Singh, Rahul Mayor, Aditya Bansal
We describe a rare case of scleral buckle (SB) infection with Serratia species. A 48-year-old male with a history of retinal detachment repair with scleral buckling presented with redness, pain, and purulent discharge in the left eye for 4 days. Conjunctival erosion with exposure of the SB and scleral thinning was noted. The SB was removed and sent for culture. Blood and chocolate agar grew Gram-negative rod-shaped bacillus identified as Serratia marcescens. On the basis of the susceptibility test results, the patient was treated with oral and topical antibiotics...
January 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/28298707/outcome-of-primary-rhegmatogenous-retinal-detachment-surgery-in-a-tertiary-referral-centre-in-northern-ireland-a-regional-study
#8
Michael A Mikhail, George Mangioris, Giuseepe Casalino, Stuart McGimpsey, James Sharkey, Richard Best, Wing C Chan
PURPOSE: To report the primary and final success, functional outcome and complication rates of patients with primary rhegmatogenous retinal detachment (RRD) who underwent retinal detachment surgery in a tertiary referral centre in Northern Ireland. VENUE: Vitreoretinal service, Royal Victoria Hospital, Belfast, Northern Ireland. METHODS: This is a retrospective case series of all patients who underwent primary RRD repair between 1st of January 2013 and 31st of December 2013...
January 2017: Ulster Medical Journal
https://www.readbyqxmd.com/read/28297972/instabilities-of-a-rotating-helical-rod-in-a-viscous-fluid
#9
Yunyoung Park, Yongsam Kim, William Ko, Sookkyung Lim
Bacteria such as Vibrio alginolyticus swim through a fluid by utilizing the rotational motion of their helical flagellum driven by a rotary motor. The flagellar motor is embedded in the cell body and turns either clockwise (CW) or counterclockwise (CCW), which may lead to straight forward or backward swimming, or reorientation of the cell. In this paper we investigate the dynamics of the helical flagellum by adopting the Kirchhoff rod theory in which the flagellum is described as a space curve associated with orthonormal triads that measure the degree of bending and twisting of the rod...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28297638/buckling-instabilities-and-complex-trajectories-in-a-simple-model-of-uniflagellar-bacteria
#10
Frank T M Nguyen, Michael D Graham
Observations of uniflagellar bacteria show that buckling instabilities of the hook protein connecting the cell body and flagellum play a role in locomotion. To understand this phenomenon, we develop models at varying levels of description with a particular focus on the parameter dependence of the buckling instability. A key dimensionless group called the flexibility number measures the hook flexibility relative to the thrust exerted by the flagellum; this parameter and the geometric parameters of the cell determine the stability of straight swimming...
March 14, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28296175/bent-polytypic-znse-and-cdse-nanowires-probed-by-photoluminescence
#11
Yejin Kim, Hyung Soon Im, Kidong Park, Jundong Kim, Jae-Pyoung Ahn, Seung Jo Yoo, Jin-Gyu Kim, Jeunghee Park
Nanowires (NWs) have witnessed tremendous development over the past two decades owing to their varying potential applications. Semiconductor NWs often contain stacking faults due to the presence of coexisting phases, which frequently hampers their use. Herein, it is investigated how stacking faults affect the optical properties of bent ZnSe and CdSe NWs, which are synthesized using the vapor transport method. Polytypic zinc blende-wurtzite structures are produced for both these NWs by altering the growth conditions...
March 15, 2017: Small
https://www.readbyqxmd.com/read/28295111/orbitally-driven-low-thermal-conductivity-of-monolayer-gallium-nitride-gan-with-planar-honeycomb-structure-a-comparative-study
#12
Zhenzhen Qin, Guangzhao Qin, Xu Zuo, Zhihua Xiong, Ming Hu
Two-dimensional (2D) materials with graphene as a representative have been intensively studied for a long time. Recently, monolayer gallium nitride (ML GaN) with honeycomb structure was successfully fabricated in experiments, generating enormous research interest for its promising applications in nano- and opto-electronics. Considering all these applications are inevitably involved with thermal transport, systematic investigation of the phonon transport properties of 2D GaN is in demand. In this paper, by solving the Boltzmann transport equation (BTE) based on first-principles calculations, we performed a comprehensive study of the phonon transport properties of ML GaN, with detailed comparison to bulk GaN, 2D graphene, silicene and ML BN with similar honeycomb structure...
March 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28293144/from-the-elastica-compass-to-the-elastica-catapult-an-essay-on-the-mechanics-of-soft-robot-arm
#13
C Armanini, F Dal Corso, D Misseroni, D Bigoni
An elastic rod is clamped at one end and has a dead load attached to the other (free) end. The rod is then slowly rotated using the clamp. When the load is smaller than the buckling value, the rod describes a continuous set of quasi-static forms and its end traces a (smooth, convex and simple) closed curve, which would be a circle if the rod were rigid. The closed curve is analytically determined through the integration of the Euler's elastica, so that for sufficiently small loads the mechanical system behaves as an 'elastica compass'...
February 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28292775/effectiveness-of-combined-macular-buckle-under-direct-vision-and-vitrectomy-with-ilm-peeling-in-refractory-macular-hole-retinal-detachment-with-extreme-high-axial-myopia-a-24-month-comparative-study
#14
Jin Ma, Honghui Li, Xiaohu Ding, Silvia Tanumiharjo, Lin Lu
PURPOSE: To evaluate the efficacy of a combined macular buckle under direct vision and 23-gauge pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling in refractory macular hole retinal detachment (MHRD) with extreme high axial myopia. DESIGN: Prospective, randomised controlled study. PARTICIPANTS: The study included 98 eyes of 98 patients of MHRD with extreme high axial (>30 mm) myopia. INTERVENTION: Patients were randomly assigned to undergo PPV with ILM peeling (group 1, n=52) or PPV with ILM peeling combined with macular buckle under direct vision (group 2, n=46)...
March 14, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28291699/in-silico-investigation-of-cornea-deformation-during-irrigation-aspiration-in-phacoemulsification-in-cataract-surgery
#15
Dariush Bayatpour, Omid Abouali, Alireza Ghaffarieh, Goodarz Ahmadi
To analyze the stress, strain and displacement of the human cornea under the action of negative intraocular pressure, which occurs during phacoemulsification in cataract surgery, a multidisciplinary approach including biomedical engineering, solid mechanics, numerical analysis, and fluid dynamics was used. Fluid-structure interaction method was implemented using 3-dimensional nonlinear finite element analysis of cornea tissue in conjunction with CFD analysis of anterior chamber fluid flow to study the deformation of the cornea under negative gage pressure during irrigation and aspiration (I/A)...
March 10, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28289741/flow-induced-buckling-of-flexible-shells-with-non-zero-gaussian-curvatures-and-thin-spots
#16
Gary Han Chang, Yahya Modarres-Sadeghi
We study the influence of one or multiple thin spots on the flow-induced instabilities of flexible shells of revolution with non-zero Gaussian curvatures. The shell's equation of motion is described by a thin doubly-curved shell theory and is coupled with perturbed flow pressure, calculated based on an inviscid flow model. We show that for shells with positive Gaussian curvatures conveying fluid, the existence of a thin spot results in a localized flow-induced buckling response of the shell in the neighborhood of the thin spot, and significantly reduces the critical flow velocity for buckling instability...
March 14, 2017: Soft Matter
https://www.readbyqxmd.com/read/28289263/fast-killing-parasites-can-be-favoured-in-spatially-structured-populations
#17
Helen C Leggett, Geoff Wild, Stuart A West, Angus Buckling
It is becoming increasingly clear that the evolution of infectious disease is influenced by host population structure. Theory predicts that parasites should be more 'prudent'-less transmissible-in spatially structured host populations. However, here we (i) highlight how low transmission, the phenotype being selected for in this in context, may also be achieved by rapacious host exploitation, if fast host exploitation confers a local, within-host competitive advantage and (ii) test this novel concept in a bacteria-virus system...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28289261/growth-rate-transmission-mode-and-virulence-in-human-pathogens
#18
Helen C Leggett, Charlie K Cornwallis, Angus Buckling, Stuart A West
The harm that pathogens cause to hosts during infection, termed virulence, varies across species from negligible to a high likelihood of rapid death. Classic theory for the evolution of virulence is based on a trade-off between pathogen growth, transmission and host survival, which predicts that higher within-host growth causes increased transmission and higher virulence. However, using data from 61 human pathogens, we found the opposite correlation to the expected positive correlation between pathogen growth rate and virulence...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28287742/self-assembly-of-silver-nanowire-ring-structures-driven-by-compressive-force-of-liquid-droplet
#19
Baekhoon Seong, Hyun Sung Park, Ilkyung Chae, Hyungdong Lee, Xiaofeng Wang, Hyung-Seok Jang, Jaehyuck Jung, Changgu Lee, Liwei Lin, Doyoung Byun
In nanowire-dispersed in liquid droplets, the interplay between the surface tension of the liquid and the elasticity of the nanowire determines the final morphology of the bent or buckled nanowire. Here, we investigate the fabrication of a silver nanowire (Ag NW) ring generated by encapsulation inside fine droplets. We used a hybrid aerodynamic and electrostatic atomization method to ensure the generation of droplets with scalable size in the necessary regime for ring formation. We analytically identify the compressive force of the droplet driven by surface tension as the key mechanism for the self-assembly of ring structures...
March 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28283281/trends-in-vitreoretinal-procedures-for-medicare-beneficiaries-2000-to-2014
#20
Michael D McLaughlin, John C Hwang
TOPIC: The purpose of this study was to identify changes in use for vitreoretinal procedures by measuring the number of allowed services using data from the US Medicare Part B Fee-for-Service (FFS) beneficiaries and their providers. CLINICAL RELEVANCE: To analyze vitreoretinal procedural trends, which may indicate standard of care and importance of developing methods of treatments. METHODS: Medicare Part B National Summary Data Files for calendar years 2000 to 2014 were used to identify the number of allowed services for vitreoretinal procedures and commonly used pharmacologic agents...
March 7, 2017: Ophthalmology
keyword
keyword
71182
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"