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(Urine Flow Studies, Urine Flow Test, Urodynamic Studies)
Uroflowmetry is a simple, diagnostic screening procedure used to calculate the flow rate of urine over time. The test is noninvasive (the skin is not pierced), and may be used to assess bladder and sphincter function.
Uroflowmetry is performed by having a person urinate into a special funnel that is connected to a measuring instrument. The measuring instrument calculates the amount of urine, rate of flow in seconds, and length of time until completion of the void. This information is converted into a graph and interpreted by a physician. The information helps evaluate function of the lower urinary tract or help determine if there is an obstruction of normal urine outflow.
During normal urination, the initial urine stream starts slowly but almost immediately speeds up until the bladder is nearly empty. The urine flow then slows again until the bladder is empty. In persons with a urinary tract obstruction, this pattern of flow is altered, and increases and decreases more gradually. The uroflowmeter graphs this information, taking into account the person’s gender and age. Depending on the results of the procedure, other tests may be recommended by your physician.
Other related procedures that may be used to diagnose urinary outflow obstruction or lower urinary tract dysfunction include cystometry, cystography, retrograde cystography, and cystoscopy. Please see these procedures for additional information.
The body takes nutrients from food and converts them to energy. After the body has taken the food that it needs, waste products are left behind in the bowel and in the blood.
The urinary system keeps the chemicals, such as potassium and sodium, and water in balance, and removes a type of waste, called urea, from the blood. Urea is produced when foods containing protein, such as meat, poultry, and certain vegetables, are broken down in the body. Urea is carried in the bloodstream to the kidneys.
Uroflowmetry is a quick, simple diagnostic screening test that provides valuable feedback about the health of the lower urinary tract. It is commonly performed to determine if there is obstruction to normal urine outflow. Medical conditions that can alter the normal flow of urine include, but are not limited to, the following:
Uroflowmetry may be performed in conjunction with other diagnostic procedures, such as cystometry and cystography.
There may be other reasons for your physician to recommend uroflowmetry.
Because uroflowmetry is a noninvasive procedure, it is safe for most persons. The test is usually done in privacy to ensure that the person voids in a natural setting.
There may be risks depending upon your specific medical condition. Be sure to discuss any concerns with your physician prior to the procedure.
Certain factors or conditions may interfere with the accuracy of uroflowmetry. These factors include, but are not limited to, the following:
Uroflowmetry may be performed on an outpatient basis or as part of your stay in the hospital. Procedures may vary depending on your condition and your physician’s practices.
Generally, uroflowmetry follows this process:
Generally, there is no special type of care following uroflowmetry. However, your physician may give you additional or alternate instructions after the procedure, depending on your particular situation.
The content provided here is for informational purposes only, and was not designed to diagnose or treat a health problem or disease, or replace the professional medical advice you receive from your physician. Please consult your physician with any questions or concerns you may have regarding your condition.
This page contains links to other Web sites with information about this procedure and related health conditions. We hope you find these sites helpful, but please remember we do not control or endorse the information presented on these Web sites, nor do these sites endorse the information contained here.