My dad had bypass surgery 6 weeks ago. He was doing pretty good till about 2 weeks ago when he developed pleural effusion on his left lung. He had it drained last week. The next morning he was rushed to the emerg because the fluid had returned and he had a pneumo thorax. He was admitted to the hospital and a chest drain was installed. He was released after 4 days. He chest x-ray was normal upon release. The day he returned from the hospital, he started feeling ill after eating a large meal. Today, he felt well in the morning but now does not have an appetit and he feels sick. He only feels well lying down. He has lost a lot of weight and cannot afford to loose anymore. We think maybe the fluid has come back. Has anyone else had this happen after 6 weeks?