Hi
I've had lithotripsy, as for how long it takes it depends on how many stones and the size of the stone(s) it usually can take up to an hour you will be put to sleep for this procedure.
Most doctors put a stent in you because pieces (fragments) of the stone will be lingering in you until you pass them and the stent will help you pass them without damaging your ureter tube(s).
Which type are you having done? The laser lithotripsy or the ESWL (extra corporeal shock wave lithotripsy)?
Are they going in through the urethra and bladder or doing it outside the body?
As for pain everyone is different and if you have a stent in you will feel uncomfortable with that.
Returning to work is usually within a day or two, depending on how you are feeling,how long the procedure was and what the doctor found.
Lithotomy is when they cut you to remove the stones and it is also the position they put you in when prepping for a cysto.
What size stone do you have?
I hope you are not in much pain.