
Hi, I'm retired now, but I used to assist with the procedure your Gran sounds like she's having. It's called ERCP. It's done endoscopically and requires a very skilled and experienced Doctor to trawl the common bile duct with a tiny balloon and remove the gall stone or stones. It does involve making a tiny cut in the ampulla, where the common bile duct joins the duodenum. Of course there are some risks to this type of procedure as there always are, but they are fairly low and in my experience this is very very successful at making the patient feel much better very quickly