Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chain sutures are present in the right mid lung . There has been no significant change in the extent of the pre-existing pleural effusions . There is no new pneumonia , pulmonary edema or pneumothorax . Mediastinal silhouette including the median sternotomy wires and valve replacement are stable .
    OUTPUT:
    
No significant change in moderate bilateral pleural effusions .