I completely understand what you are saying. But a very famous doctor would give you crap b/c he says their is no such thing as a chronic wound. If it comes into your office and looks fibrotic and chronic, you debride the heck out of it and make it an acute wound. There are non-healing wounds not chronic wounds.
I have seen a lot of things fail on non-healing wounds. Heck most grafts, ect. just slough off. The most effective thing I have every seen for non-healing wounds is a total contact cast. It bets the VAC everyday and twice on Sunday. It would be interesting to see the VAC used in a total contact system. We have a patient in a similar set up right now but he is about as compliant as a wolverine. He walked out of an ex-fix and a STJ/talotibular joint fusion rod. The rod was almost all the way out of his calcaneus.