Validity of Lung Ultrasound in Diagnosis of Acute Respiratory Distress Syndrome

Inclusion Criteria: Patients or legal guardian's consent .All patients with suspicious criteria of acute respiratory distress syndrome .Hemodynamically stable in the absence or minimal of vasopressors. Exclusion Criteria: Pregnant women. patients with traumatic lung injury or pneumothorax. surgical dressings over the right lower rib cage which would preclude ultrasound examination. presence of ascites. presence of lung collapse, fibrosis, or pleural effusion. -presence of any mass or mechanical factor in the chest or the abdomen interfering with the diaphragmatic mobility.