RESUMO
A laser-sustained plasma (LSP) is a promising method for generating atmospheric-pressure plasmas. Although diode lasers are highly efficient, compact, and low-cost light sources for LSP, previous studies have reported that the laser power required for LSP generation is high, owing to the poor beam quality of diode lasers. In this study, we attempted to generate an LSP using a 4-kW-class diode laser with different F-numbers. The minimum laser power required for LSP generation strongly depends on the F-number. Comparing F1.2 and F2.0, F1.2 reduces the required power by approximately 2,840â W. The LSP temperature and length also strongly depend on the F-number, with the temperature increasing by approximately 5,000â K and the length increasing by approximately 1.4 times at F 1.2 compared with those at F 2.0.
RESUMO
The relationship between coronavirus disease 2019 (COVID-19) and intracerebral hemorrhage remains unclear. We herein report a case of severe COVID-19 pneumonia complicated by multiple simultaneous intracerebral hemorrhages (MSICH). The patient died eight days after the episode of MSICH. No apparent coagulopathy was observed; however, extracorporeal membrane oxygenation and anticoagulation might have caused the occurrence of MSICH. Laboratory findings showed hypercoagulability, suggesting that thrombotic etiologies, such as sinus thrombosis or cerebral infarction, might also have caused MSICH. MSICH can occur as a fatal complication of COVID-19, and this should be considered when providing treatment.
Assuntos
Betacoronavirus , Hemorragia Cerebral/virologia , Infecções por Coronavirus/diagnóstico , Pneumonia Viral/diagnóstico , Betacoronavirus/isolamento & purificação , COVID-19 , Teste para COVID-19 , Hemorragia Cerebral/diagnóstico , Técnicas de Laboratório Clínico , Infecções por Coronavirus/complicações , Evolução Fatal , Humanos , Masculino , Pessoa de Meia-Idade , Pandemias , Pneumonia Viral/complicações , SARS-CoV-2RESUMO
Delayed posthypoxic leukoencephalopathy (DPHL), a demyelinating syndrome, can easily be misdiagnosed as a psychiatric condition. Our case study shows that magnetic resonance imaging is highly useful for an early diagnosis of DPHL and that vascular endothelial growth factor might be a supplementary biomarker for the early detection of DPHL.