“…During ultrasonographic examination the bladder is filled with fluid to least 200 ml [37,40], 200-300 ml [51,54], 400 ml [39], 250 ml [24,53], 300 ml [23,27,28,30,34], 100-400 [251 or fully [10,21,38,39,41,[47][48][49][50]. In one study [45] the bladder was filled with 250 ml and 500 ml fluid and vaginal ultrasonography was repeated.…”