Study of Diaphragmatic Ultrasound as a Predictor of Mechanical Ventilation in Patients With Respiratory Diseases on Admission to Intensive Care Unit

Ultrasonography has been used to explore diaphragmatic contractile activity by measuring thickening fraction .When thickening fraction was \< 20% during tidal breathing, it is commonly associated with respiratory failure. Diaphragmatic ultrasound had been used before as a tool to predict weaning from mechanical ventilation. In this study diaphragmatic ultrasound will be done upon admission to predict of mechanical ventilation in patients with respiratory diseases.