RESUMO
OBJECTIVE: Lung ultrasound is a useful tool for diagnosis and follow-up of diseases in critically ill neonates. Its use is increasingly widespread thanks to its advantages over other imaging tests and the rapidly growing body of evidence to support it, and "point-of-care ultrasound" (POCUS) has become a key component in neonatal guidelines. The objective of this special article is to present the foundations and the established diagnostic and therapeutic applications of lung ultrasonography as well as introducing new applications. METHODS AND RESULTS: The Lung Ultrasound Section of the Neonatal Ultrasonography Working Group of the Spanish Neonatology Society has summarised the current scientific evidence. The article describes the sonographic features of the most common respiratory diseases, discusses some of the applications of ultrasound in neonatal care (such as prediction of admission and need of surfactant, ultrasound-guided procedures or monitoring of lung development in premature infants) and proposes its introduction in other scenarios in which its use is not quite established at present, such as resuscitation or respiratory management. This article reaffirms the usefulness of lung ultrasound in guiding diagnosis, clinical decision-making and prognosis and facilitating procedures. CONCLUSIONS: Lung ultrasound should be established as the gold standard for diagnosis of respiratory diseases in neonates. Therefore, training in lung ultrasound should be included in the educational curriculum of neonatologists and in diagnostic and therapeutic care protocols. Research on the subject should continue to be pursued with performance of rigorous multicentre studies to increase the quality of the evidence.
