Low Diaphragm Thickening Fraction at One Hour Predicts Noninvasive Ventilation Failure

Noninvasive ventilation remains a cornerstone of management for patients presenting to the emergency department with acute respiratory failure, particularly in cases of hypercapnic chronic obstructive pulmonary disease or acute heart failure [1, 2]. While these modalities can reduce the need for invasive mechanical ventilation, identifying which patients will eventually require endotracheal intubation remains a significant clinical challenge [3, 4]. Delayed intubation in the setting of failing noninvasive support is associated with increased morbidity, yet the criteria for treatment failure are often poorly defined in clinical practice [3, 5]. Current guidelines emphasize the importance of early identification and appropriate management in the initial hours of respiratory distress to improve patient outcomes [6, 7]. A new prospective study now evaluates whether bedside ultrasound of the diaphragm can provide an objective predictor of treatment trajectory during the first hour of support.