Why You Need a Urodynamic Study? A urodynamic study may be recommended if you have problems with storing or voiding urine, and your doctor needs to evaluate these problems further. Possible problems that you may have include the following: You may be incontinent (leak urine). Your bladder may not empty completely. You may have symptoms, such as the frequent need to urinate or a constant, urgent need to urinate. Your urine stream may be intermittent or weak. You may have persistent urinary tract infections.