6 documents found, page 1 of 1
Impact of ultrasound settings on lung vertical artefacts: an observational stud...
Leote, João; Gonçalves, Andreia; Fonseca, Júlia; Loução, Ricardo; Dias, Maria Hermínia Monteiro Brites; Ribeiro, Maria Inês; Meireles, RicardoThe number of vertical artefacts (VAs) in lung ultrasound (LUS) impacts patients' clinical management. This study aimed to demonstrate the influence of ultrasound settings on the number of VAs in patients under invasive mechanical ventilation (IMV). Methods: Patients under IMV were recruited for LUS, including three breathing cycles with a motionless curvilinear probe on the thoracic region with the most VAs. T...
Total signal intensity of ultrasound laboratory vertical artifacts: a semi-quan...
Leote, Joao; Loução, Ricardo; Aguiar, Madalena; Tavares, Mariana; Ferreira, Paloma; Muxagata, Tiago; Guerreiro, Diana; Dias, Hermínia BritesQuantitative approaches to improve lung ultrasound (LUS) vertical artifacts (VA) interpretation using total signal intensity (ITOT) are not widely available for clinical practice. In this study, we aimed to i) develop a mathematical algorithm to extract ITOT as a post-hoc LUS analysis and ii) confirm ITOT utility by conducting laboratory VA research using an in vitro model with different acoustic channels. The ...
To B or not to B-lines [editorial]
Gonzalez, Filipe André; Bacariza, Jacobo; Leote, João; EchoCrit GroupWith great interest, we have read the paper from Boero et al. titled “Lung Ultrasound among Expert Operators: Scoring and Inter-rater Reliability Analysis (LESSON study), a secondary COWS study analysis from the ITALUS group”, which provides a focused evaluation of lung ultrasound (LUS). The author’s analysis reflects the increasing use of LUS as a valuable diagnostic and monitoring tool for assessing pulmonary...
Influence of ultrasound settings on laboratory vertical artifacts
Leote, Joao; Muxagata, Tiago; Guerreiro, Diana; Francisco, Cláudia; Dias, Hermínia Brites; Loução, Ricardo; Bacariza, Jacobo; Gonzalez, FilipeObjective: The aim of the work described here was to analyze the relationship between the change in ultrasound (US) settings and the vertical artifacts' number, visual rating, and signal intensity METHODS: An in vitro phantom consisting of a damp sponge and gelatin mix was created to simulate vertical artifacts. Furthermore, several US parameters were changed sequentially (i.e., frequency, dynamic range, line d...
Machine learning for the real-time assessment of left ventricular ejection frac...
Varudo, Rita; Gonzalez, Filipe; Leote, João; Martins, Cristina; Bacariza, Jacobo; Fernandes, Antero; Michard, FredericBackground: Machine learning algorithms have recently been developed to enable the automatic and real-time echocardiographic assessment of left ventricular ejection fraction (LVEF) and have not been evaluated in critically ill patients. Methods: Real-time LVEF was prospectively measured in 95 ICU patients with a machine learning algorithm installed on a cart-based ultrasound system. Real-time measurements taken...
Automation of sub-aortic velocity time integral measurements by transthoracic e...
Gonzalez, Filipe; Varudo, Rita; Leote, João; Martins, Cristina; Bacariza, Jacobo; Fernandes, Antero; Michard, FredericPoint-of-care ultrasound techniques are increasingly used for the bedside assessment of cardiac function and haemodynamics in critically ill patients. The sub-aortic or left ventricular outflow tract velocity time integral (VTI) can be measured using pulsed-Doppler ultrasonography from a transthoracic apical 5-chamber view. Quantifying VTI is useful to discriminate between vasoplegic states (hypotension with no...