I do agree that you did require the procedure that you mentioned as you seemed to have a fairly large stone at your VUJ - this is the junction of bladder and ureter
. Though it is a large stone, this procedure should usually not have caused you much discomfort, and to prevent even the minor discomfort, I place stents for any calculus beyond 1.5 cm which has been obstructing the passage. I guess in your case, the stent was removed perhaps a shade early. This is however a matter of opinion, and not everyone would agree with me when I retain stents for at least 2 - 3 weeks after the procedure. I feel that this gives the ureter time to recover completely from the auguries of the ureteroscopic procedure of such a large stone. The fact that you seem to require catheter for so many days after the procedure certainly sounds odd, and i think you can certainly attempt a trial void after catheter removal again, and this time as you yourself have suggested, maybe hold on for at least 3 -4 hours or till your bladder becomes well distended to know whether this trial is successful or not. Most patients would be able to pass urine comfortably in that time. I do not think stent will prevent you from voiding urine, but if you have pain while voiding urine after removal of Foley's catheter, there are medications like alpha-blockers to reduce the discomfort which will probably be quite useful to you. Let me know your progress, and if any further doubts, I will be more than happy to answer.