(L)I can't answer much about chronic PA, but my daughter is finishing her 3rd month of Tobi with the "eradication protocol". I think her last culture was negative & I hope she will be all clear for a while. I thought I had seen some people here who actually managed to get rid of it, but I don't know for sure.
My son had PA when he was first diagnosed & he hasn't had it since we did the 3 months of Tobi with Cipro (knock on wood) 3 years ago.
I don't know how often you go to clinic there, but we go every 4-6 weeks. In theory, any bugs should get picked up & knocked out pretty quickly.
Is there no way the IV antibiotics, etc can kill out the PA? I so feel for you!! I worry about my kids all the time. I am very relieved my son didn't get the PA from his big sister.
Good luck and, yes, there is life after Pseudomonas.