My grandson developed kidney stones when he was put in a full cast after 
falling off a cliff. They were going to go in to remove them in a week. While 
he waited his father made tea by boiling bunches of parsley he bough at the 
grocery store, and he sipped on it all day long while he waited for surgery. He 
began peeing gravel and when he went in for the surgery, the doctors said they 
couldn't find any stones.

I have also read that canned asparagus, slurried in a food processor with some 
water and drank 3 or 4 times a day also dissolved kidney stones.

Worth a try.

Dick