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Cystometric study uses a device to pump water into the bladder. The device then measures the amount of fluid present in the bladder when you first feel the need to urinate, when you are able to sense fullness, and when your bladder is completely full.
How the test is performed
You are asked to void (urinate). The time required to begin voiding and the size, force, and continuity of the urinary stream is recorded. The amount of urine, how long the voiding took, and the presence of straining, hesitancy, and dribbling are also recorded.
Next, the thermal sensation is evaluated. Room-temperature saline solution is instilled into the bladder, followed by warm water.
You need to tell the health care provider what, if any, sensations are felt. The water is then drained from the bladder.
A cystometer (a tube used to monitor bladder pressure) is connected to the catheter. Water or carbon dioxide gas is slowly introduced into the bladder at a controlled rate.
You will need to tell the provider when you first feel the need to urinate. The pressures and volumes are recorded. When the bladder is full, you must urinate, and the pressure of the urination is recorded.
The bladder is again drained of any residual urine and the catheter is removed.
How to prepare for the test
Infants and children:
How the test will feelThere is some discomfort associated with this test. You may experience pain, flushing , sweating , nausea , bladder filling, and a sense of an urgent need to urinate.
Why the test is performedThe test is performed to help determine the cause of bladder/voiding dysfunction.
Normal ValuesNormal values vary and should be discussed with your health care provider.
What abnormal results mean
The test might indicate a cause for urinary tract infection , diminished bladder capacity, multiple sclerosis , stroke , a spinal cord injury , bladder outlet obstruction, or overactive bladder.
What the risks areThere is a slight risk of urinary tract infection and blood in the urine .
Special considerationsThis test should not be done if you have a known urinary tract infection . An existing infection increases the possibility of false test results, and the test increases the possibility of spreading of the infection.
Update Date: 1/9/2003David R. Knowles M.D., Department of Urology, New York-Presbyterian Hospital Columbia Campus, New York, NY. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT