Hi,my dad under went a bypass surgery 3 months back.He had pleural efffusion in both his lungs of which 250 cc was tapped from his right lung post surgery and it remain clear till date.But the pleural effusion in his left lung had increased from 80cc post surgery to 250cc, after which he was started with Diator 10 mg (diuretic) and his pleural effusion was down to 40 cc a month back. His dosage of Diator was reduced to only twice a week, but the recent report still shows 40cc of pleural effusion in his left lung. His total fluid intake in 1500ml/day. Further more the Chest X ray shows a few calcified foci. What is the cause for both this problem and what should be the treatment. Thanks, Hemal Lodaya