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Capillary leak syndrome (CLS) is a rare, potentially life-threatening systemic disease with a mortality rate of more than 30%. Its major clinical manifestation and diagnostic basis are systemic hyperedema. However, we lack knowledge about the presence of severe myocardial edema in patients with CLS. If myocardial edema cannot be detected, it will become a dangerous hidden condition that threatens the safety of patient lives. With the routine application of point-of-care critical ultrasound (POC-CUS) in clinical practice, we found that 2 of 37 (5.41%) CLS patients had severe myocardial edema as the main manifestation. It is also necessary to distinguish it from myocardial noncompaction in newborn infants with severe myocardial edema. This paper will help us to have a deeper understanding and correct management of CLS and, thus, help us to improve the prognosis of patients. This article also suggests the necessity of routine implementation of POC-CUS in the neonatal intensive care unit. [ABSTRACT FROM AUTHOR]

Lung ultrasound (LUS) has been widely used in the diagnosis and differential diagnosis of neonatal lung diseases (NLDs), but whether it can replace the routine use of chest X-ray (CXR) in neonatal intensive care units (NICUs) remains controversial. This paper summarizes the clinical practice of our neonatal intensive care unit (NICU) during the past three years to explore the feasibility and necessity of using LUS instead of CXR to diagnose NLDs in the NICU setting. The clinical data and LUS examination results from 1,381 newborn infants with respiratory difficulty who were hospitalized in our NICU from March 2017 to February 2020 were retrospectively collected to analyze the types of lung diseases diagnosed and the reliability of LUS for diagnosing NLDs. (1) During this period, 1381 newborn infants with dyspnea were admitted to our NICU, accounting for 41.2% of all hospitalized children. (2) Among the 1381 infants, 17 patients with respiratory distress were confirmed as having severe heart disease by echocardiography, while the remaining 1364 patients had different kinds of lung diseases: pneumonia (697 patients, 51.1%), respiratory distress syndrome (251 patients, 17.4%), transient tachypnea of the newborn (197 patients, 13.3%), atelectasis (89 patients, 5.6%), pneumothorax (46 patients, 3.2%), pulmonary hemorrhage (69 patients, 4.5%), severe pleural effusion (18 patients, 1.32%), congenital pulmonary sequestration (3 patients, 0.22%), bullae of the lung (2 patients, 0.15%), and congenital cystic adenomatoid malformation (2 patients). (5) Among the 1381 infants, 217 received CXR examination before admission, which resulted in misdiagnosis in 45 patients (20.7%) and missed diagnosis in 12 patients (5.5%); the missed diagnosis and misdiagnosis rate was 26.3%. Our 3-year clinical practice experience indicated that LUS could completely replace chest X-ray for the diagnosis and differential diagnosis of NLDs in the NICU. Compared with X-ray, LUS had higher accuracy and reliability in diagnosing NLDs. [ABSTRACT FROM AUTHOR]