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Uroflometry How the Test is Performed:
You are asked to sit on a portable toilet called a commode chair. You push a button on the chair 5 seconds before you urinate, then 5 seconds after you are finished. A graph of your urine output is produced that plots the volume of urine versus time.
How to Prepare:
Your health care provider may ask you to temporarily discontinue medications that can alter test results.
Do not urinate for 2 hours before the test, and increase the volume of fluids you drink so you will have plenty of urine for the test.
Do not place any toilet tissue in the urine receptacle.
Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
How it Feels:
The test involves only normal urination.
Risks:
There are no risks associated with this test.
Why this Test is Performed:
This test is useful in evaluating urinary tract function and in the detecting of bladder outlet obstruction .
Normal Values:
Normal values vary depending on age and sex: - Age: 4 to 7
- The average flow rate for males and females is 10 ml/sec
- Age: 8 to 13
- The average flow rate for males is 12 ml/sec and 15 ml/sec for females.
- Age: 14 to 45
- The average flow rate for males is 21 ml/sec and 18 ml/sec for females.
- Age: 46 to 65
- The average flow rate for males is 12 ml/sec and 15 ml/sec for females.
- Age: 66 to 80
- The average flow rate for males is 9 ml/sec and 10 ml/sec for females.
Abnormal Results:
If the flow rate is increased, there may be a decrease in the resistance to urine flow. Several circular muscles that normally regulate urine flow, and if any becomes weak or dysfunctional, increased urine flow and urinary incontinence may result.
If there is a decrease in urine flow, a bladder outlet obstruction may exist.
Cost:
Information not available.
Special Considerations:
Not applicable.
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