The people who did her last treatment for the pleural effusion at Scarborough Gen. Did it wrong . they apparently fixed one lung and just drained the other instead of fixing it too . Everything my mom has ever had to have repeated at Princess Margaret , Toronto Gen , Etc .

Answer the following question: What caused the doctors at the last hospital to botch the treatment of the pleural effusion ?
They were being somewhat sloppy but ultimately it was not an intentional decision on their part