in all honesty, he never classified it as that i officially passed a stone. the pee-pee test revealved only that i ws slightly dehydrayed. he saw no sign of infection or anything! (he was going by the symptons i told him...i ran a 101 fever for a day, took tylenol, it went down to normal, then back up to 100 1/2 on the 2nd day, took tylenol, then it was normal after that, and i had mild groin pain for a few days.