Home > Kidney Disease > Bladder Ultrasound and Urinary Flow Rate Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Feb 03, 2010 by Neil Baum, Views: 2654 Bladder Ultrasound and Urinary Flow Rate examinations. These tests are performed to look for obstruction of flow of the urine. It is common in men with an enlarged prostate, but can happen in other conditions.