Urodynamic tests are considered the gold standard in diagnosing problems with the lower urinary tract. A series of tests are performed to characterize the functioning of the bladder and urethra for elucidation of problems such as incontinence, bladder obstruction, and even cancer.
The test can measures abnormal contractions or spasms of your detrusor muscle (smooth muscle in the wall of the bladder) while the bladder is filling. While you might feel the catheter being inserted into the urethra, the test does not hurt. A catheter is a small and flexible tube.
Video urodynamic tests take pictures and videos of the bladder during filling and emptying. The imaging equipment may use x-rays or ultrasound. If x-ray equipment is used, the bladder will be filled with a special fluid, called contrast medium, that shows up on x-rays.