Diaphragmatic Speckle Tracking to Guide Diaphragm-Protective Ventilatory Support: A Study of Feasibility and Efficacy.

To evaluate the feasibility of diaphragmatic speckle tracking, images acquired under three different high-flow settings (low, medium, and high) will be compared with those obtained under the clinically applied flow rate previously used for each patient.

To investigate the clinical value of diaphragmatic speckle tracking, this study compares PEEP titrated by ultrasound-based assessment with PEEP determined by conventional P/F ratio tables, and analyzes differences in clinical outcomes between the two groups.