Hi D,
I know we've talked about your leakage in the past, but I have no memory left. If you're not doing a lot of bending, exercising, etc. that makes the skin around your stoma do weird things, then there's really no reason you can't get a good seal. I'll just throw some things out there and see what sticks....
For your output to go under your ring, it would mean either your stoma isn't pointed straight out from your body, or something is obstructing the bag....meaning if your output can't simply fall out and down into the bag, something is forcing it to go under your ring.
Assuming you're not wearing a belt across your stoma or something else a bit stupid......what is directing your output under the ring. Is the ring behind your stoma (from the top looking down) or is it on the same level as your stoma? It needs to be behind your stoma so your output shoots out and over the ring....I know...duh. Even if your ring didn't stick well to your body........if your stoma extends past your ring surface, output would never get behind it. So we need to understand the physics of what you've got going on.
Is your stoma retracted? Meaning is the end of it that stuff comes out of actually lower than your skin around it? I could see where that would be a problem even with a convex barrier.
Are all your leaks occurring when you're laying down........or do you get leaks when standing? Do you get pancaking........i.e., thick non-liquidy output that you have to push down into the bag to assist it........or is your output always pretty free-flowing? I very rarely get pancaking, but when I do, my output can work its way under my ring, as my stoma points to the right.....right into the side of my ring. I'm assuming your stoma sticks straight out though.
When you remove your barrier to change it on days you have no leakage, is the adhesion to your skin any different than when you remove your barrier after a leak occurs? I'm talking about the part of the barrier that has not leaked..........obviously where the leak is you have no adhesion. I'm trying to see if adhesion is playing any part in this or if it's the physics of how your stoma is aimed and where it directs your output.
Again, you've probably already answered most of my questions, but it might be easier for everyone if we recall where you're at with what I've asked. There's an actual nurse with an ostomy on here now that can probably help get to the bottom of this mystery as well.....so it will be new info for her too.
Regards,
Bob