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Bedwetting: Doing a bladder function test

Dr. D. Preston Smith
Author Dr. D. Preston Smith
Submitted 09-10-2007

The Potty Trainer

Bladder function tests can be performed to determine if the bladder, urethra, and sphincters work normally. A child can urinate into a special potty while having small sensors placed on the buttocks to determine if the stream, flow, and sphincters are normal.

A catheter (tube) can be inserted into the bladder to measure how well a child empties, how much the bladder holds, and what pressures are generated by the bladder. This test is called urodynamics. Urodynamics should only be obtained if one suspects significant abnormal bladder function due to a neurological problem or abnormal potty habits.

Children with just bedwetting should not undergo urodynamics in the majority of cases.


– Dr. D. Preston Smith


Dr. Smith is board certified and he has authored or co-authored many articles, papers, chapters, and books in Urology and Pediatric Urology. His research has been presented throughout the world. Dr. Smith’s dedication to helping children with urologic problems inspired him to establish PottyMD.