Urodynamic studies (UDS) are a series of tests designed to evaluate the function of the bladder and urethra. These tests help diagnose problems related to urinary incontinence, bladder control, and other lower urinary tract symptoms. Urodynamic studies measure the bladder's ability to hold and release urine and examine how well the bladder, sphincters, and urethra are performing their job of storing and releasing urine efficiently.