Ok Dpol,
That is a totally different thing that you are describing...have you been scopped to confirm that as the diagnosis? Or is it just the 'feeling' or 'inability' of getting the tube into the pouch once it has gone through the valve (difficulty finding the pouch opening?) Very different things...a stricture(narrowing) of the opening may well be treated with a baloon dialation depending on the doc...they put the scope in, and under a florascope inflate a baloon that 'stretches' the zone...not really painful or difficult to do but it may need a few repeats and they have to be really, very careful while doing it not to stretch too far.
For the other possibility...it could indicate a valve twist or a peristomal hernia that has 'disaligned'the valve with the pouch or a 'U turn' spot in the valve...totally different treatments too.
Valve twists require full out surgery when they become problematic. Peristomal hernias can be dealth with through laporoscopic surgery if you find someone willing to do them that has a bit of imagination and knowhow...(my k pouch surgeon taught my laporoscopic surgeon what to do)...as for the 'U turn' spot in the length of the valve...I didn't realise that it was possible until it happened to me...it comes from constantly 'pushing' the tube in and hitting the wrong spot (not the opening but the side of the valve somewhere) and creating an indentation that keeps getting deeper/larger with every time that you hit it...they tell me that it requires surgery but I am living with it for now...just intubating slower and more carefully so as to not aggravate it...been 2 yrs...so far so good. Don't know if you stop hitting the spot what happens (will it heal or stay the same?) but am trying hard...
Hope that this gives you some responses to your question.
Sharon