Hi Emby,
It's a good improvement but there is still work to be done in the heart and Ferriprox is known for its ability to remove iron from the heart. Desferal is known for having a better ability for removing iron from the liver. Now that the liver iron is gone, the need for desferal is not currently there, as long as another chelator is being used. Even if it turns out that he does have to return to desferal later on, it is good to have a break, as all chelators have side effects and desferal's side effects are more of the long term use variety, so taking a break whenever possible is a good thing. The Ferriprox can work on the current problem and desferal isn't really needed, so I do agree to raising the Ferriprox dose and attacking the heart iron. I am sure he will also appreciate the break. Explain to him that it may or may not be a permanent break from the needle, so that if he does have to resume later on, he won't be so disappointed. As long as he doesn't have any problems using Ferriprox, it is preferred.
I have heard many doctors express a belief that no chelator should be depended on for an entire lifetime because of the long term effects, so switching to another chelator is something most patients should consider at some point during their lives. As more chelators are approved, this does become much easier. Since heart failure is the number one cause of death in thals, a chelator that works better in the heart is important and Ferrirpox does provide this. I am hoping we see similar results with long term Exjade use, but right now we can only be certain about Ferriprox.
I would also recommend that you make sure he is getting plenty of antioxidants in his diet and supplements.