Estudo comparativo entre vasovasostomia com adesivo de fibrina e micro-sutura convencional em ratos Wistar /

Orientador: Luiz Carlos de Almeida RochaInclui apęndiceTese (doutorado) - Universidade Federal do Paraná, Setor de Cięncias da Saúde, Programa de Pós-Graduaçăo em Clínica Cirúrgica. Defesa: Curitiba, 2005Inclui bibliografia e anexo

Estudo da distribuiçăo anatômica das artérias infra-renais e da configuraçăo do sistema coletor de rins humanos /

Orientador : Jurandir Marcondes Ribas FilhoDissertaçăo (mestrado) - Programa de Mestrado Interinstitucional em Clínica Cirúrgica da Universidade Federal do Paraná e Universidade Regional de Blumena

Laparoscopic adrenalectomy for large pheochromocytoma: a challenging case report

Pheochromocytoma is a rare neuroendocrinal tumor, cause of severe hypertension and excretion of catecholamines. The gold standard treatment is laparoscopic adrenalectomy, however when the tumor is more than 6 cm laparoscopy access is controversy. The patient was a 41-year-old man with severe hypertension and important weight loss. CT showed a adrenal mass with contrast enhancement and central necrosis with 10x8cm. Laboratory exams demonstrated serum calcium of 12.5mg/dL, high urinary catecholamines at the expense of noradrenaline (13 936 ug/24h) and serum noradrenaline of 7451 pg/ml. The authors performed an adrenalectomy of a large tumor by laparoscopic approach without major complications. Histopathology showed pheochromocytoma with 11x8 cm and 285 gr without capsular involvement. This case report may bring information about adrenal tumors management and shows that large pheochromocytomas are challenging cases, but if well programmed can be done by minimally invasive access with safety.O feocromocitoma é um tumor neuroendócrino raro, causa de hipertensão grave e excreção de catecolaminas. O tratamento padrão ouro é a adrenalectomia laparoscópica, no entanto, quando o tumor apresenta mais de 6 cm de tamanho, o acesso laparoscópico é controverso. O paciente do relato, é um homem de 41 anos com hipertensão grave e perda de peso importante. A tomografia computadorizada mostrou uma massa adrenal com captação de contraste e necrose central medindo 10x8cm. Os exames laboratoriais demonstraram cálcio sérico de 12,5 mg/dL, catecolaminas urinárias elevadas às custas da noradrenalina (13 936 ug/24h) e noradrenalina sérica de 7451 pg/ml. Os autores realizaram uma adrenalectomia neste paciente por abordagem laparoscópica sem maiores complicações. A histopatologia evidenciou um feocromocitoma com 11x8 cm e 285 gr sem envolvimento capsular. Este relato de caso traz informações sobre o manejo de tumores adrenais e mostra que apesar de grandes feocromocitomas serem casos difíceis, se houver um bom preparo cirúrgico, é possível realizar o procedimento por acesso minimamente invasivo com segurança

Carcinoma de úraco

O carcinoma de úraco é uma rara neoplasia que costuma se manifestar quando já está avançada. Além disso, pode causar dificuldade diagnóstica com o adenocarcinoma de origem vesical, o que pode ocasionar o tratamento inadequado do mesmo. Descrevemos o caso de uma paciente em que o diagnóstico do adenocarcinoma de úraco foi feito através de tomografia computadorizada e o tratamento realizado através de ressecção em bloco das estruturas com prometidas, com um seguimento de 13 meses, sem evidência de recidiva da neoplasia

Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb^-1. The b-jets are identified using either a lifetime-based method, where secondary decay vertices of b-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of b-hadrons inside jets. The inclusive b-jet cross-section is measured as a function of transverse momentum in the range 20 < pT < 400 GeV and rapidity in the range |y| < 2.1. The bbbar-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < m_jj < 760 GeV, the azimuthal angle difference between the two jets and the angular variable chi in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured cross-sections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured bbbar-dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.Comment: 10 pages plus author list (21 pages total), 8 figures, 1 table, final version published in European Physical Journal

Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment

This paper describes an analysis of the angular distribution of W->enu and W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and the missing transverse energy, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw > 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables, revised author list, matches European Journal of Physics C versio

Observation of a new chi_b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS

The chi_b(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider (LHC) at sqrt(s) = 7 TeV and recorded by the ATLAS detector. Using a data sample corresponding to an integrated luminosity of 4.4 fb^-1, these states are reconstructed through their radiative decays to Upsilon(1S,2S) with Upsilon->mu+mu-. In addition to the mass peaks corresponding to the decay modes chi_b(1P,2P)->Upsilon(1S)gamma, a new structure centered at a mass of 10.530+/-0.005 (stat.)+/-0.009 (syst.) GeV is also observed, in both the Upsilon(1S)gamma and Upsilon(2S)gamma decay modes. This is interpreted as the chi_b(3P) system.Comment: 5 pages plus author list (18 pages total), 2 figures, 1 table, corrected author list, matches final version in Physical Review Letter

Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS

We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb^-1 collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models.Comment: 8 pages plus author list (20 pages total), 8 figures, 1 table, final version to appear in Physics Letters

Standalone vertex finding in the ATLAS muon spectrometer

A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multi-particle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to long-lived neutral particles that in turn decay to bbar b final states, and pp collision data at √s = 7 TeV collected with the ATLAS detector at the LHC during 2011

Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC

Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H →γ γ, H → Z Z∗ →4l and H →W W∗ →lνlν. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV, corresponding to an integrated luminosity of about 25 fb−1. Evidence for Higgs boson production through vector-boson fusion is reported. Results of combined fits probing Higgs boson couplings to fermions and bosons, as well as anomalous contributions to loop-induced production and decay modes, are presented. All measurements are consistent with expectations for the Standard Model Higgs boson