Hey, I need to apologize! I was wrong in what I said in my original post about this not being a true idea (re delaying wound healing 7 hours with each dressing change). I talked to our ET/WOCN at work this morning about it. She said this is true! It has to do with the fact that exposing the wound to air lowers the internal temperature of the wound and interupts the biologic process the body has started. The wound must warm up again to the "proper" temperature before the process can continue. She explained it better than that, but I can't remember all the technical details right now. I sure learned something though! I'm glad I have her as a very available and willing resource. Again, my apologies for replying to your question before I had checked all the information.