My dad is on hemodialysis. Recently he had a thoracentesis and the doctor extracted more then 2 liters of clear yellow luquid from his right pleural cavity. He took a chest Xray today and it shows the fluid is back and worse. The lab tests on the liquid drawn previously were negative. What is causing the buildup of liquid in his pleural cavity?
Thanks for your question on Chat Doctor. Fluid in pleural cavity is known as pleural effusion.  And broadly speaking there are two types. 1. Transitive.2. Oxidative. Transitive effusion is due to causes other than pleural disease. It is seen in cardiac, liver and kidney diseases. It is basically due to fluid overload and low protein. And both of these are seen in kidney patients. Hemodialysis causes protein loss and this is the cause for Transitive effusion in your fathers case. So better to get done protein level and start protein supplements.