Hi Shannon, Sorry it took me so long to get back.
I cant really remember all that was said about the sandwich procedure. It is like a three step process. They put a small tube in your back and then I think they scrape around and try to vacuum out the rest. Sorry, I know that was a horrible explanation. Anyway, I was told I would be in the hospital for 5-6 days. That is one of the main reasons I am ignoring my stone
I wish that I could help you with the drs, but I have nothing nice to say about any of them.
Good Luck and let me know what you find out.
p.s. all of the other non urologist drs I have been to this year(other health problems) have all said they would leave the stone in also.