The primary goal of this study is to assess diaphragm function in patients with acute respiratory failure before and during the use of high-flow oxygen and/or non-invasive breathing support. The key question it seeks to answer is: 1\. How do ultrasound measurements of diaphragmatic function vary with different levels of breathing support in patients with acute respiratory failure? Participants with acute respiratory failure will undergo diaphragmatic ultrasound evaluation as part of their standard medical care at various levels of respiratory support.
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Correlation of Diaphragmatic Function (Excursion and Thickening Fraction) with Ventilatory Support Effectiveness in Patients with Acute Respiratory Failure
Timeframe: From enrollment to ICU discharge (aprox. 2 weeks)