Urodynamic Testing: Understanding Urinary Incontinence More Precisely

Urinary incontinence is a condition that affects a significant portion of the population, especially among older adults. While often considered a minor issue, it can have serious effects on daily life, social interactions, and self-esteem. When basic tests don’t reveal the cause of urine leakage, your doctor may refer you for a urodynamic test. This examination offers a detailed view of how your bladder, sphincters, and pelvic floor muscles are functioning.

What is urinary incontinence?

Also referred to as bladder leakage, urinary incontinence is the unintentional loss of urine from the urethra. Normally, the bladder stores urine until the pelvic floor muscles and sphincters release it voluntarily. When this control is impaired - due to muscle fatigue, nerve damage, or bladder overactivity - incontinence can occur. While it's more common in individuals aged 65 and older, it can also affect postpartum women or people who have undergone pelvic surgery or suffer from chronic bladder conditions.

Why is a urodynamic test recommended?

If standard exams such as ultrasound or X-rays are inconclusive and treatments have not been successful, a urodynamic test may be necessary. This test provides a comprehensive analysis of the lower urinary tract. It measures:

• The pressure inside the bladder during filling and emptying;
• The strength and coordination of the pelvic muscles;
• The volume and flow of urine and any remaining urine after voiding;
• Possible nerve-related dysfunctions in the bladder or urethra.

The results can guide your physician toward a targeted treatment or even surgery if needed.

How to prepare for the test

Before undergoing the procedure:

• Your general practitioner will provide a prescription, and the test will be carried out at a hospital—without fasting or anesthesia.
• Inform the medical staff about your current medications, any allergies, or the presence of a heart valve prosthesis.
• Avoid urinating at least one hour before the test, so a urine sample can be taken to rule out infection.

What happens during the test?

The procedure lasts between 30 and 60 minutes and includes several steps:

• Flowmetry: You’ll urinate into a special toilet that measures flow rate and pressure. The goal is to evaluate the strength and consistency of your stream and check for leftover urine in the bladder.
• Cystometry: A fine catheter is inserted into the bladder to slowly fill it with water. This simulates the natural filling process and records internal bladder pressure. You'll be asked to describe how you feel (mild urge, strong urge, discomfort, etc.).
• Urethral pressure profile: As the catheter is slowly withdrawn, it measures the strength of your sphincter. You’ll need to remain still and relaxed during this part of the test.

After the test

It’s normal to experience slight discomfort or a burning sensation when urinating for a few hours after the test. Drinking plenty of water (at least 1.5 liters per day) is recommended to help cleanse the bladder. If symptoms persist or worsen after 48 hours, consult your doctor to rule out a urinary tract infection.