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Am J Case Rep ; 21: e924476, 2020 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-32796809


BACKGROUND The effect of corticosteroids in the management of patients with coronavirus disease 2019 (COVID-19) is unclear. CASE REPORT A 67-year-old man who tested positive for COVID-19 by reverse-transcription PCR (RT-PCR) analysis was admitted to our hospital. On admission, he had no dyspnea and his oxygen saturation (SpO2) level was normal. Chest imaging revealed ground-glass opacities (GGO) distributed in both lung fields. Four days after admission, bilateral lung shadows worsened, with a slight reduction in SpO2 levels. Short-term corticosteroid therapy was initiated, and SpO2 and radiographic findings promptly improved without use of antiviral agents. CONCLUSIONS More data are required to ascertain the role of corticosteroids in the management of COVID-19 pneumonia.

Betacoronavirus , Infecções por Coronavirus/tratamento farmacológico , Glucocorticoides/administração & dosagem , Metilprednisolona/administração & dosagem , Pneumonia Viral/tratamento farmacológico , Idoso , COVID-19 , Infecções por Coronavirus/diagnóstico , Esquema de Medicação , Humanos , Pulmão/diagnóstico por imagem , Masculino , Oxigênio/sangue , Pandemias , Pneumonia Viral/diagnóstico , SARS-CoV-2 , Tomografia Computadorizada por Raios X
Ultramicroscopy ; 135: 64-70, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23876296


The minimum detection limit and spatial resolution for a thinned semiconductor sample were determined by electron probe microanalysis (EPMA) using a Schottky field emission (FE) electron gun and wavelength dispersive X-ray spectrometry. Comparison of the FE-EPMA results with those obtained using energy dispersive X-ray spectrometry in conjunction with scanning transmission electron microscopy, confirmed that FE-EPMA is largely superior in terms of detection sensitivity. Thin-sample FE-EPMA is demonstrated as a very effective method for high resolution, high sensitivity analysis in a laboratory environment because a high probe current and high signal-to-noise ratio can be achieved.