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Alternative Names Return to topUroflow
Definition Return to top
Uroflowmetry is a test that measures the volume of urine released (excreted) from the body, the speed with which it is excreted, and how long the excretion takes.
How the Test is Performed Return to top
You will urinate in a special urinal or toilet with a machine that has a measuring device.
You will be asked to begin urinating after the machine has started. When you finish, the machine will create a report for your health care provider.
How to Prepare for the Test Return to top
Your health care provider may ask you to temporarily stop taking medications that can affect the test results.
Uroflowmetry is best done when you have a full bladder. Do not urinate for 2 hours before the test. Drink extra fluids so you will have plenty of urine for the test.
Do not place any toilet tissue in the test machine.
How the Test Will Feel Return to top
The test involves normal urination, so you should not experience any discomfort.
Why the Test is Performed Return to top
This test is useful in evaluating the function of the urinary tract.
Normal Results Return to top
Normal values vary depending on age and sex:
What Abnormal Results Mean Return to top
Results are compared with your symptoms and physical exam. A result that may need treatment in one patient may not need treatment in another patient.
Several circular muscles normally regulate urine flow. If any of these muscles becomes weak or stops working, you may have an increase in urine flow or urinary incontinence.
If there is a bladder outlet obstruction or if the bladder muscle is weak, you may have a decrease in urine flow.
Your health care provider should explain and discuss any abnormal results with you.
Risks Return to top
There are no risks with this test.Update Date: 9/7/2008 Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Louis S. Liou, MD, PhD, Assistant Professor of Urology, Department of Surgery, Boston University School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.