Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of mediastinal drain and left sided chest tube . No pneumothorax is identified . The lung parenchyma is essentially unchanged in appearance with mild bibasilar atelectasis . Stable cardiomegaly and mediastinal silhouettes . Monitoring and support devices are otherwise unchanged . Sternotomy wires are intact .
    OUTPUT:
    
No significant changes with removal of left chest tube and mediastinal drain .