Radioactive seed localization of nonpalpable breast lesions in an academic comprehensive cancer program community hospital setting.

Wire localized excision (WLE) has been a long-standing method for localization of nonpalpable breast lesions. Disadvantages of this method include difficulty locating the wire tip in relation to borders of the lesion, imprecise placement of the wire, and the need to place the wire shortly before scheduled surgery. These shortcomings may lead to a high positive margin rate requiring re-excision to obtain clear margins for breast cancer. Radioactive seed localized excision (RSLE) of nonpalpable breast lesions has been advocated as a safe and effective alternative to WLE. The primary endpoints of the study were to compare re-excision rates between WLE and RSLE of nonpalpable breast lesions and to determine if there were any differences in volume of tissue removed. One hundred three patients were included in a retrospective review of localized breast excisions done by a single surgeon. Forty-four patients underwent WLE between April 2007 and February 2009. Fifty-nine patients underwent RSLE between September 2009 and January 2012. Margins were considered to be clear if at least 1 mm of normal tissue was obtained from the circumferential periphery of the lesion in question. RSLE resulted in a re-excision rate of 17 versus 55 per cent re-excision rate for wire localization (P < 0.001). Excision volume was greater for patients having wire localization (P = 0.074). RSLE is an effective technique for excision of nonpalpable breast lesions in the community setting. This technique allows for accurate localization and appears to allow for smaller volume of tissue to be excised.

Hydrophobic collapse of a stearic acid film by adsorbed l-phenylalanine at the air-water interface.

The surface morphology of atmospheric aerosol particles can influence the particle's overall effect on climate through enhancing or impeding its ability to uptake and evaporate water. In the work presented here, complementary surface-sensitive information from π-A isotherms, Brewster angle microscopy (BAM), and infrared reflection-absorption spectroscopy (IRRAS) are used to monitor the induced hydrophobic collapse of a surfactant film by an adsorbed amino acid at the air-water interface. The stearic acid film studied here is well-known to form a very stable floating monolayer at the air-water interface, and is shown in this work to withstand isotherm compression-expansion cycles without any premature collapse. With the presence of the water-soluble amino acid l-phenylalanine, however, significant disruption is observed of the stearic acid film, evidenced by the disappearance of its liquid-condensed phase from the isotherm cycles, as well as premature collapse structures observed in the BAM images and a change in intensity in stearic acid's C-H stretching region in the IRRAS spectra. Throughout this process, the surface layer is transformed from a homogeneous hydrophobic surface to an inhomogeneous surface with three-dimensional hydrophobic aggregates as well as hydrophilic "holes" with minimum surfactant coverage.

Dados clínicos mundiais sobre a eficácia e a segurança da ciprofloxacina / World wide clinical data on efficacy and safety of ciprofloxacin

Em ensaios clínicos 8.861 pacientes foram tratados com ciprofloxacina a nível mundial. Dos tratamentos realizados,03.822 foram válidos para análise da eficácia, de acordo cocm os padröes do FDA. Em geral foram administradas as seguintes doses: infecçöes do trato urinário: 100 a 50 mg duas vezes por dia, por via oral ou 100 mg duas vezes por dia, por via intravenosa; infecçöes do trato respiratório: 250 a 1.000 mg, duas vezes ao dia, por via oral ou 200 mg duas vezes por dia, por via intravenosa; septicemia: 200 mg duas vezes por dia, por via intravenosa; gonorréia: 250 a 500 mg, por via oral, em dose única; todas as outras infecçöes: 500 a 1000 mg duas vezes por dia, por via oral ou 200 mg, duas vezes por dia, por via intravenosa. A ciprofloxacina foi administrada em 762 tratamentos de infecçöes respiratórias baixas, 88 infecçöes respiratórias altas, 108 bacteremias, 766 infecçöes de pele e anexos, 142 infecçöes dos ossos e articulaçöes, 149 infecçöes intra-abdominais, 33 infecçöes gastrintestinais, 1.633 infecçöes do trato urinário, 49 infecçöes pélvicas, 279 doenças transmitidas sexualmente, principalmente gonorréia, e em três meningites. A resposta clínica foi cura em 76%, melhora em 18% e falha em apenas 6%. A resposta bacteriológica em relaçäo a todos os locais avaliáveis foi: patógenos erradicados em 74%, acentuadamente reduzidos em 2% e persistentes em 10%. Ocorrem recidivas em 4% e reinfecçöes em outros 6%. A resposta global foi favorável em 90% dos pacientes. A segurança da droga foi estabelecida com base nos dados de 8.861 tratamentos a nível mundial. De acordo com a terminologia de COSTART, foram observadas as seguintes reaçöes adversas: digestivas 5%, metabólico-nutricionais 4,6% sistema nervoso central 1,6%, pele 1,4%, hematológicas e linfáticas 1%, cardiovasculares 0,4%, urogenitais 0,3%, órgäos dos sentidos 0,3%, músculo-esqueléticas 0,1%, respiratórias 0,08%...