What It Is
A urodynamic study is a group of tests used to evaluate how well the bladder and urethra are storing and releasing urine.
What It Checks
Urodynamic studies assess several aspects of bladder function, including how much the bladder can hold, the pressure within the bladder as it fills, and how effectively the bladder empties during urination. Together, these measurements help characterize the specific nature of a bladder-related problem.
Why It's Used
Urodynamic studies are commonly used to investigate symptoms such as difficulty urinating, urinary leakage, or a frequent and urgent need to urinate, particularly when a more detailed understanding of how the bladder is functioning is needed to guide appropriate management.
How It's Done
During a urodynamic study, thin catheters are used to measure pressure within the bladder, and sometimes within the abdomen for comparison, while the bladder is gradually filled with fluid. The person may be asked to report sensations of fullness or urgency as the bladder fills, and to urinate during the test so that the pressure and flow patterns during urination can also be recorded.
Background
Techniques for measuring bladder pressure and function developed over the mid-20th century, as urologists sought more objective, detailed information about bladder function than could be gathered from symptoms and examination alone. Urodynamic testing has become increasingly standardized and refined since then, incorporating more precise measurement technology, and it remains a valuable diagnostic tool for evaluating complex bladder-related symptoms today.