Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left approach tunneled line terminates at the right atrium . The heart size remains top normal . Since 9 :15 a .m . there has been interval drainage of a left pleural effusion . There is no pneumothorax or focal consolidation .
    OUTPUT:
    
Post - drainage of a left pleural effusion . No pneumothorax .