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Voiding Pressure Study (Pressure Flow Study)

A pressure flow study measures the pressure in your bladder as you urinate. It also measures the urine flow rate. This study helps to find a block in the bladder from prostate enlargement or when combined with the CMG may identify a weak bladder or another issue.

When you feel your bladder is full, you’ll be asked to urinate into a special chair. This time, you’ll urinate with a void pressure catheter (a “manometer”) in place. The catheter is small and your urine will flow around the catheter. This tool measures how well your bladder muscles work as it empties.

After the studies, some people feel a burning sensation or pain or may see blood in the urine. This goes away within a day or two. If you continue to see blood in your urine or have a fever, please tell your doctor.

Urodynamics Related Resources

Information about Other Diagnostic Tests

Urologic Radiology


Fact Sheet

Fact Sheet

 

Other Groups' Resources

MedlinePlus – National Institutes of Health

Cystometric Study (English)
Estudio cistométrico (Español)

Uroflowmetry (English)
Uroflujometría (Español)


National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC)

Urodynamic Testing

 

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