Hi,
My mother had problems with fluid in her abdomen. I believe they were draining 5 L. After her exploratory surgery she had intraperitoneal chemo (cisplatin) and so far the fluid has not returned. They put the drug into her abdomen via a port and kept it there for 4 hours (she rolled into different postions every 30 min.) then after 4 hours they begain removing it via gravity drain. She was draied once after this treatment and since then the fluid has not returned -- its almost been 3 months. Prior to this she was being drained about every week.
I'm not sure if this works for everyone and I don't know if her results will last. But I hope this gives you some more info.