I don’t know if they still do this, but at Mayo, they used to inject with something (some type of beads or something like that) that blocked leakage. I found it worked for a great length of time, but then had to be redone; and, so, I had it done multiple times over the course of a decade or more. But, then, I stopped when Corvid hit and, at the same time, my Internist at Mayo went into semi retirement and I stopped traveling to Mayo.