daggy, in the US they used to remove just the stone, but currently they remove the gallbladder when they find a stone, or sludge, because it indicates the gallbladder isn't functioning.

The cholecystectomy, gallbladder removal, is typically an easy procedure. It's done laparscopically (used to be through a large incision that required weeks of healing), and the paitent has 3 small--1 inch or less-- incisions for the instruments. It's a quick procedure, very routine. My own surgeon had his removed, went into work the next day to check on something and ended up staying and working because he felt fine! When he removed my GB, I was kept overnight for observation (I slept, they observed evidentally ). Then I was discharged and went home and except for being a bit groggy from the anesthesia, I felt fine and was doing my regular activites the following day.