Overview
The study aims to predict the failure of High-flow Nasal Cannula oxygenation therapy by ultrasound evaluation of diaphragm and intercostal muscle contraction during the first 24 hours.
Eligibility
Inclusion Criteria:
- more than 18 years old
- needing High-flow Nasal Cannula oxygenation therapy
Exclusion Criteria:
- received mechanical ventilation, including invasive or noninvasive ventilation within one month prior to enrollment
- history of neuromuscular disorders (e.g., myasthenia gravis, Guillain-Barre syndrome);
- immediate endotracheal intubation is required (life-threatening hypoxemia)
- extensive damage to the thoracic skin (e.g., burns) unable to undergo ultrasonography
- pregnancy
- attending physician deemed it inappropriate to participate in the trial.