Complicações da via transfemoral no tratamento do descolamento assético de artroplastias da anca

A via transfemoral é um procedimento com reconhecido valor na cirurgia de recolocações de artroplastias da anca. Todavia, poucas são as publicações que estudam as complicações que podem surgir a médio ou longo prazo. O objetivo central deste trabalho inclui a análise do tipo e frequência de complicações relacionadas com a via transfemoral, usada no tratamento de 61 descolamentos asséticos de artroplastias da anca com um recuo médio de 39 meses (min. 12 meses, max. 132 meses), implantando em todos os casos uma haste de revisão cónica Conelock®. Entre janeiro de 2006 e Março de 2011 foram realizadas no Serviço 445 revisões de artroplastias da anca: 181 recolocações acetabulares, 8 recolocações de hastes femorais, 230 recolocações bipolares, 15 recolocações da cabeça/colo da haste e 11 artroplastias de ressecção. A via transfemoral foi usada em 108 situações . Neste período e respeitando os critérios acima referidos identificou‐se de modo aleatório uma série de 61 recolocações de hastes femorais, implantadas em 22 doentes do género feminino e 38 do masculino, com idade média 71 anos (máx. 87; min 45 ). Em 94% dos casos houve uma consolidação da osteotomia. Como complicações relacionadas com a via transfemoral registou‐se: Não‐união trocantérica (2); migração proximal do fragmento ósseo femoral (1); fraturas tardias do fragmento trocantérico-femoral (3); infeção superficial (1); infeção periprotética (4), osteólises relacionadas com cabos metálicos (1), descolamento assético precoce (1); afundamento da haste femoral (1); No total obteve‐se uma taxa de complicação de 23%, que está em consonância os resultados obtidos na literatura internacional que ronda os 24%. Em 8 casos foi necessária uma ou mais revisões motivadas pelas complicações acima descritas. A complicação maior foi a infeção periprotética que levou à excisão artroplástica em uma situação. Os casos de fraturas do fragmento trocantérico-femoral foram tratadas de forma conservadora. Contrariamente à situação que acontecia quando o fragmento trocantérico-femoral era fixado, de forma não rígida, com fios de sutura não reabsorvíveis, a baixa frequência de migrações proximais do fragmento ósseo janela pode ser explicada pelo uso, para a sua estabilização mecânica, de pelo menos 2 cabos metálicos. Por sua vez, as osteólises relacionadas com os cabos metálicos não tiveram repercussões funcionais significativas. Os aloenxertos esponjosos desempenharam o seu papel biológico no processo de consolidação da osteotomia. De salientar a idade elevada dos pacientes, assim como a incontornável frequência de co-morbilidades. Apesar de facilitar a técnica de recolocação das hastes femorais, a via transfemoral pode estar na origem de uma frequência significativa de complicações e, por isso, deve ser indicada em casos seleccionados de recolocações das artroplastias da anca por descolamento assético

Interactions between surfactants and {1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl}

The interaction between the water-soluble anionic conjugated copolymer poly{1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl} (PBS-PFP) and various surfactants has been studied in aqueous solution by UV-vis absorption spectra, fluorescence and electrical conductivity. It is suggested from the linear dependence of absorbance, fluorescence and electrical conductivity on concentration that in the absence of surfactant, moderately stable dispersions are formed. These are affected in different ways on adding cationic, anionic or neutral surfactants. With the cationic cetyltrimethylammonium bromide, quenching of fluorescence intensity and lifetime, and formation of a new emission occurs at concentrations well below the critical micelle concentration (cmc). Electrical conductivity measurements indicate a discontinuity at surfactant/polymer ratio corresponding to electroneutrality, due to complexation. With the anionic sodium dodecyl sulfate, fluorescence quenching is also observed, but is attributed to formation of some mixed polymer/surfactant aggregate. The most striking changes are observed with the non-ionic pentaethyleneglycol monododecyl ether (C12E5), where a blue shift in fluorescence emission, dramatic increases in lifetime and quantum yield, and changes in electrical around the cmc are interpreted in terms of incorporation of single polymer chains in elongated cylindrical micelles. This is supported by 1H NMR spectroscopic measurements.http://www.sciencedirect.com/science/article/B6TFR-4GJK86Y-7/1/847da7ebe75424aac8aa097365af1c3

Valor nutritivo dos capins Quênia e Tamani sob diferentes intensidades de desfolhação.

PT-BR: Nos sistemas de produção de bovinos é necessário entender a relação planta x animal, adotando a estratégia de manejo correta para garantir a melhor utilização da forrageira. O objetivo com este trabalho foi avaliar o valor nutritivo dos capins Quênia e Tamani sob diferentes intensidades de desfolhação. O experimento foi realizado na Embrapa Agrossilvipastoril, Sinop ? MT, este seguiu delineamento experimental em blocos completos casualizados, em arranjo fatorial (2x2), com dois cultivares: Quênia e Tamani (Panicum maximum cvs. BRS Tamani e Quênia) e duas intensidades de pastejo: alta e baixa, definidas pela altura pós-pastejo de 15 e 25 cm para capim-tamani; e 20 cm e 35 cm para capim-quênia, com três repetições, totalizando 12 unidades experimentais (120m2 cada). A forragem analisada foi coletada no ciclo representativo da primavera de 2016. Houve efeito de interação cultivar x intensidade de desfolhação para os teores de proteína bruta (PB). O capim-quênia manejado em baixa intensidade apresentou menor teor de PB (6,08%), quando comparado ao capim-tamani manejado em baixa intensidade (8,48%). Os cultivares, independente da intensidade de desfolhação adotada apresentaram bom valor nutritivo. Dessa forma, quando bem manejados, ambos são genótipos promissores. | EN: In cattle production systems, it is necessary to understand the relationship between plant and animal, adopting the correct management strategy to ensure the best use of forage. The objective of this research was to evaluate the nutritive value of Quenia and Tamani guineagrass under different defoliation intensities. The experiment was conducted in a randomized complete block in a factorial arrangement (2x2), with two cultivars: Quenia and Tamani (Panicum maximum cvs BRS Tamani and Quenia) and two grazing intensities: high and low, which defined a post height 15 cm and 25 cm for Tamani guineagrass; and 20 cm and 35 cm for Quenia guineagrass, with three replicates, totaling 12 experimental units (120 m2 each). The forage analyzed was collected in the representative cycle of the spring of 2016. There was interaction effect of cultivar x intensity of defoliation for crude protein (CP) contents. Quenia guineagrass managed in low intensity showed lower CP content (6.08%) when compared to Tamani guineagrass managed at low intensity (8.48%). The cultivars, regardless of the intensity of defoliation adopted, presented good nutritive value. In this way, when well managed, both are promising genotypes

Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at s√=8 TeV with ATLAS

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of s√=8 TeV. The analysis is performed in the H → γγ decay channel using 20.3 fb−1 of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal is extracted using a fit to the diphoton invariant mass spectrum assuming that the width of the resonance is much smaller than the experimental resolution. The signal yields are corrected for the effects of detector inefficiency and resolution. The pp → H → γγ fiducial cross section is measured to be 43.2 ±9.4(stat.) − 2.9 + 3.2 (syst.) ±1.2(lumi)fb for a Higgs boson of mass 125.4GeV decaying to two isolated photons that have transverse momentum greater than 35% and 25% of the diphoton invariant mass and each with absolute pseudorapidity less than 2.37. Four additional fiducial cross sections and two cross-section limits are presented in phase space regions that test the theoretical modelling of different Higgs boson production mechanisms, or are sensitive to physics beyond the Standard Model. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations

Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS

The prompt and non-prompt production cross-sections for the χ c1 and χ c2 charmonium states are measured in pp collisions at s√ = 7 TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χ c states are reconstructed through the radiative decay χ c → J/ψγ (with J/ψ → μ + μ −) where photons are reconstructed from γ → e + e − conversions. The production rate of the χ c2 state relative to the χ c1 state is measured for prompt and non-prompt χ c as a function of J/ψ transverse momentum. The prompt χ c cross-sections are combined with existing measurements of prompt J/ψ production to derive the fraction of prompt J/ψ produced in feed-down from χ c decays. The fractions of χ c1 and χ c2 produced in b-hadron decays are also measured

Measurement of the production of a W boson in association with a charm quark in pp collisions at √s = 7 TeV with the ATLAS detector

The production of a W boson in association with a single charm quark is studied using 4.6 fb−1 of pp collision data at s√ = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96+0.26−0.30 at Q 2 = 1.9 GeV2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ(W + +c¯¯)/σ(W − + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s−s¯¯¯ quark asymmetry

Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at s√=8 TeV with the ATLAS detector

The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proton-proton collision data at a centre-of-mass energy s√=8 TeV collected in 2012, corresponding to an integrated luminosity of 20 fb−1. No significant excess above the Standard Model expectation is observed. Limits are set on supersymmetric particle masses for various supersymmetric models. Depending on the model, the search excludes gluino masses up to 1.32 TeV and squark masses up to 840 GeV. Limits are also set on the parameters of a minimal universal extra dimension model, excluding a compactification radius of 1/R c = 950 GeV for a cut-off scale times radius (ΛR c) of approximately 30

Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using √s=8 TeV proton-proton collision data

A search for squarks and gluinos in final states containing high-p T jets, missing transverse momentum and no electrons or muons is presented. The data were recorded in 2012 by the ATLAS experiment in s√=8 TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 20.3 fb−1. Results are interpreted in a variety of simplified and specific supersymmetry-breaking models assuming that R-parity is conserved and that the lightest neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 1330 GeV for a simplified model incorporating only a gluino and the lightest neutralino. For a simplified model involving the strong production of first- and second-generation squarks, squark masses below 850 GeV (440 GeV) are excluded for a massless lightest neutralino, assuming mass degenerate (single light-flavour) squarks. In mSUGRA/CMSSM models with tan β = 30, A 0 = −2m 0 and μ > 0, squarks and gluinos of equal mass are excluded for masses below 1700 GeV. Additional limits are set for non-universal Higgs mass models with gaugino mediation and for simplified models involving the pair production of gluinos, each decaying to a top squark and a top quark, with the top squark decaying to a charm quark and a neutralino. These limits extend the region of supersymmetric parameter space excluded by previous searches with the ATLAS detector

Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector

Results of a search for H → τ τ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb−1 and 20.3 fb−1 at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV respectively. All combinations of leptonic (τ → `νν¯ with ` = e, µ) and hadronic (τ → hadrons ν) tau decays are considered. An excess of events over the expected background from other Standard Model processes is found with an observed (expected) significance of 4.5 (3.4) standard deviations. This excess provides evidence for the direct coupling of the recently discovered Higgs boson to fermions. The measured signal strength, normalised to the Standard Model expectation, of µ = 1.43 +0.43 −0.37 is consistent with the predicted Yukawa coupling strength in the Standard Model

Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector

This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at √s=7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb−1. Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displaced decay vertices and optimised for jet flavour identification, are used in a multidimensional template fit to measure the fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity |y|<2.1. The fit results agree with the predictions of leading- and next-to-leading-order calculations, with the exception of the dijet fraction composed of bottom and light flavour jets, which is underestimated by all models at large transverse jet momenta. The ability to identify jets containing two b-hadrons, originating from e.g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions