Uroflowmetry and Post-void Residual

Uroflometry a simple test that measures the force of your urinary stream and the time it takes you to empty your bladder. Post-void residual: measures the ability of your bladder to empty completely during voiding.
Both tests are indicated if you have lower urinary tract symptoms as:

  • Frequency and urgency
  • Urinary incontinence
  • Difficult urination, dribbling and sense of incomplete emptying of your bladder after urination
  • Recurrent urinary tract infection to ensure proper emptying of your bladder

Preparation for Uroflowmetry:

Uroflowmetry is best done when you have a partially full bladder. Do not urinate for 2 hours before the test. Drink extra fluids but do not over fill your bladder. If you are too full or you try to urinate when the bladder is empty, we will get incorrect results. We consider a study a good one for evaluation purposes if you have voided about 200cc


Uroflowmetery: You will ask to urinate in a special urinal or toilet with a machine that has a measuring device. When you finish, the machine will create a report. No urine specimen is collected during this test.

Post-void residual (PVR): This is done with ultrasound. You will be asked to lie flat on the exam table after you have urinated. The surface of your lower abdomen and pelvis will need to be exposed. A towel will be placed along the waistband of your clothing to protect it from the gel that is used for the study. Gel is placed on the skin over your bladder. The ultrasound probe will be placed over this area, and a recording will be made. The test is painless.

You will have no side effects as a result of this study.