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Advances in lung ultrasound.

Ultrasound examination of the chest has advanced in recent decades. This imaging modality is currently used to diagnose several pathological conditions and provides qualitative and quantitative information. Acoustic barriers represented by the aerated lungs and the bony framework of the chest generate well-described sonographic artifacts that can be used as diagnostic aids. The normal pleural line and A, B, C, E and Z lines (also known as false B lines) are artifacts with specific characteristics. Lung consolidation and pneumothorax sonographic patterns are also well established. Some scanning protocols have been used in patient management. The Blue, FALLS and C.A.U.S.E. protocols are examples of algorithms using artifact combinations to achieve accurate diagnoses. Combined chest ultrasonography and radiography are often sufficient to diagnose and manage lung and chest wall conditions. Chest ultrasonography is a highly valuable diagnostic tool for radiologists, emergency and intensive care physicians. RESUMO O exame ultrassonográfico do tórax avançou nas últimas décadas, sendo utilizado para o diagnóstico de inúmeras condições patológicas, e fornecendo informações qualitativas e quantitativas. Os pulmões aerados e o arcabouço ósseo do tórax representam barreira sonora para o estudo ultrassonográfico, gerando artefatos que, bem conhecidos, são utilizados como ferramentas diagnósticas. Eco pleural normal, linhas A, linhas B, linhas C, linhas E e Z (conhecidas como falsas linhas B) são artefatos com características peculiares. Os padrões de consolidação e de pneumotórax também são bem estabelecidos. Alguns protocolos têm sido utilizados no manuseio dos pacientes: Blue Protocol, Protocolo FALLS e Protocolo C.A.U.S.E são exemplos de três propostas que, por meio da associação entre os artefatos, permitem sugerir diagnósticos precisos. A ultrassonografia de tórax, aliada à radiografia de tórax, muitas vezes é suficiente para o diagnóstico e a conduta das afecções pulmonares e da parede torácica. Trata-se de ferramenta diagnóstica de grande valia para médicos radiologistas, emergencistas e intensivistas.

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