Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Swan - Ganz catheter is in unchanged position with the tip in the main pulmonary artery . ___ are noted overlying the bilateral mid lungs . Bilateral chest tubes are present . Hemostats are overlying the mediastinum . An NG tube courses below the diaphragm with the tip in the field of view . The mediastinal contour is widened , but unchanged from the prior exam . The cardiac size is normal . The lungs are clear without discrete consolidations , pulmonary edema , pleural effusion , or pneumothorax .
    OUTPUT:
    
1 . Stable mediastinal widening . 2 . Unchanged appearance of multiple support devices . 3 . No evidence of pneumonia .