Urodynamic testing

Diagram of the female and male urethra, which are assessed during urodynamic testing.

Urodynamic testing is a series of diagnostic procedures used to evaluate the function of the bladder and urethra. These tests are essential for diagnosing issues related to urinary incontinence, urinary retention, and other lower urinary tract symptoms. Urodynamic tests measure the bladder's ability to hold urine and empty steadily and completely.

Types of Urodynamic Tests

There are several types of urodynamic tests, each serving a specific purpose:

• Uroflowmetry: This test measures the volume of urine released from the body, the speed with which it is released, and how long the release takes. It helps in assessing the flow rate and identifying any blockages.

• Cystometry: This test evaluates how much urine the bladder can hold, how much pressure builds up inside the bladder as it stores urine, and how full it is when the urge to urinate begins.

• Pressure Flow Study: This test measures the pressure in the bladder and the flow rate of urine to determine if there is any obstruction in the bladder or urethra.

• Electromyography (EMG): This test assesses the electrical activity of the muscles and nerves in and around the bladder and the sphincters.

• Video Urodynamic Tests: These tests use imaging equipment to visualize the bladder and urethra during the filling and emptying process.

Indications for Urodynamic Testing

Urodynamic testing is indicated for patients experiencing:

• Urinary incontinence
• Frequent urinary tract infections
• Difficulty urinating
• Painful urination
• Sudden, strong urges to urinate
• Problems starting a urine stream

Procedure

The procedure for urodynamic testing varies depending on the specific test being conducted. Generally, the patient will be asked to arrive with a full bladder. During the test, catheters may be inserted into the bladder and rectum to measure pressure. The patient may be asked to urinate into a special device that measures the flow rate.

Risks and Considerations

Urodynamic testing is generally safe, but there are some risks, including:

• Discomfort or pain during the test
• Urinary tract infection
• Blood in the urine

Patients are advised to drink plenty of fluids after the test to help flush out the bladder and reduce the risk of infection.

Related Pages

• Urinary incontinence
• Bladder
• Urethra
• Urinary tract infection

References

• Abrams, P., et al. (2002). "The standardisation of terminology in lower urinary tract function: report from the Standardisation Sub-committee of the International Continence Society." *Neurourology and Urodynamics*, 21(2), 167-178.
• Chapple, C. R., et al. (2008). "The role of urodynamic investigation in the diagnosis and management of lower urinary tract symptoms." *BJU International*, 101(1), 1-7.