I'm not sure how it goes with men- but I had a stent put in about 3 weeks ago due to stones and the fact that I am pregnant- so they couldn't do the proper x-rays nor blast them so I could pass them.
It was my understanding that stents are put in for more chronic stone conditions- and not to actually help you pass the stone- but to help the urine bypass the stones so it doesn't back up--- but I may be wrong!
For me- again- a woman- they did a spinal for anesthesia to insert the stent. I didn't feel a thing- though since then I have had very bloody urine and a good amount of pain/discomfort from it--- I will have it removed after I give birth and they they will decide how to treat the stones.
I hope you feel better- not sure if this helped or not- hopefully others will have more "manly" answers for you