Thanks for the explanation. I thought that is what it was, and that is what I have, but had not heard that term before. My stoma sticks out about
2 inches and until recently had not given me any trouble. Recently though, it had started retracting like a turtles head inside itself behind the flange. Then the output would work its way to the edge of the flange and out (leak) Uhg~!
The manufacturers suggested the barrier ring or the Convex flange.I have tried samples and both systems work great, so I think I will go with the convex flange.
Convatec makes a really good one, that turtlenecks around the stoma so I may switch to their brand.Thanks again.