So. The stone was removed. It was so big and the removal was so hard that the tube (ureter?) was damaged. So, Steven has to keep the stent in for another 2-3 weeks untilt he tube has healed. Otherwise he will have large amounts of scar tissue which would cause blockages any time he has stones in the future. So, while the stone is gone, he is in pain from the procedure and is still stuck with a stent.