title: False negative retrograde cystography with bladder rupture owing to external trauma.
abstract: False negative retrograde cystograms were found in five of 116 bladder ruptures due to external trauma. A volume of 250 ml or less of contrast medium and the lack of a post-washout film were felt to be responsible for the false negative findings. With a volume of 400 ml of contrast medium and a post-washout film, false negative retrograde cystograms were not obtained.
mesh_terms: D000293:Adolescent; D000328:Adult; D003558:Cystoscopy; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012421:Rupture; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000293:injuries*