If you have a problem with frequent voiding, an urgent or difficult-to-control desire to void, urine leakage or reduced urine flow, then we may suggest you have urodynamics testing. This is the “gold standard” assessment of lower urinary tract symptoms and helps your specialist see how well your bladder and urinary sphincter muscles are working.
First of all you will be asked to do a flow test.
For the second part of the test (“cystometry”), you lie on a couch. The aim is to measure how much urine your bladder can hold, how the pressure changes inside your bladder with increasing volume, and how these factors relate to your urge to urinate.
A small catheter (tube) is gently passed through the penis and into the bladder; another is passed into the rectum to record pressure there as well. As the test progresses, your bladder is slowly filled with sterile water and you will be asked about bladder sensation and any desire to pass water.
Once your bladder is full, you will be asked to pass urine; the catheters remain in place to measure the pressure in your bladder as you pass urine. This pressure-flow study can identify bladder outflow obstruction and show whether you have prostate enlargement or stricture (tightening) in the urethra.
We can tell you the results of the tests immediately afterwards. You can then discuss them with your consultant and decide on a treatment plan.