I've had 5 sessions of lithotripsy to break up 2 stones, one 10mm dia. Each procedure lasts for about 30 to 40 minutes although its not painful it does get a bit uncomfortable. You will be offered a local anesthetic, I decided after the second session to do without it. Recovery time is about an hour, then back to work. The frightening bit is when you do a pee
afterwards, which they encourage you to do, it can be a bit ros'e. Also the debris starts to come out over the next few days which can be eye watering. Be careful with the pain killer tablets, as some can have nasty side effects. Generally the whole treatment is very easy. Good luck hope it goes well.