Jordy,
I have a stricture at the J Pouch inlet and my doctor said as long he can get the scope through, a balloon dilation would not be be needed. Pretty simple test. Your post suggests that the scope would not go through on its own. I would think a digital dilation was meant as a gentle substitute for a balloon dilation (which is a risky procedure because of potential for tearing of tissue), and you should not have those issues due to a digital dilation. Whether the scope may have caused those issues is another story. In the past scopes have caused minor irritations of the pouch and those can be the cause of loose stools for a few days. The scope prep (enemas and laxatives) can also be harsh and irritating. If it doesn't persist for more than a week, I wouldn't worry about it. But I think the prep rather than the scope itself is more likely harsh on the pouch causing irritation of tissues, although it could be either.