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Healthwise answeredUrodynamic studies are a group of tests that determines how the nervous system affects the filling and emptying of the bladder. The tests may be ordered if you have urine leakage or a weak stream when urinating. There is no special preparation for most of these tests, but one test does require you to avoid urinating for several hours before the test is administered.
Kevin Windom, MD, Obstetrics & Gynecology, answered
Urodynamics testing is a test that studies how the bladder and the urethra function. There are numerous causes of urinary incontinence, and it is important to diagnose the etiology of the patient's bladder disorder so as to better perform the surgery on the patient. Urodynamics testing is needed prior to any type of incontinence procedures (such as a sling procedure). During this test your doctor will check to see if your bladder muscle functions appropriately to push urine out of the bladder as well as to make sure there are no problems with urethral function and nerve damage to the urethra. Lastly, this test will show if there is any bladder spasm seen.