The chest radiographs (prethoracentesis and postthoracentesis) were analyzed by a radiologist who classifi ed the effusion by scores from 1 to 5, with 1 representing the absence of fl uid and 5 a volume occupying . 75% of the hemithorax
The chest radiographs (prethoracentesisand postthoracentesis) were analyzed by a radiologist who classifi edthe effusion by scores from 1 to 5, with 1 representing the absenceof fl uid and 5 a volume occupying . 75% of the hemithorax