Urodynamics :: Nationwide Children's Hospital

Helping Hand Logo

 

Urodynamics

Urodynamics (said like: YUR oh dye NAM icks) is a series of tests that are done to see how well the urethra (said like: you REE thruh) and bladder are working (Pictures 1 and 2). The muscle strength of the area between the legs is also measured.

Medicines

  • Continue all medicines your child is taking before the test. This includes antibiotics.
  • Bring the list of medicines your child is taking. Include the amount and how often your child takes each medicine.

Getting Ready for the Test

  • Explain to your child what will happen during the test. Use words he or she will understand.
  • Parents will stay with the child during the tests.
  • Your child should wear a two-piece outfit, like a T-shirt and jeans for the test. Bring an extra pair of socks and diapers or adult-sized diapers, if used.
  • If your child is on a regular program of clean intermittent catheterization, please measure urine output for 2 days before the test. Bring this information with you to the test.
  • If your child has a history of urinary tract infections, have his or her urine checked 10 days before the appointment. If your child has an infection the day of testing, the test will be cancelled.

The Parts of the Test

The urodynamics test is made up of several parts:
  • The uroflow test is a study that measures how fast your child can empty his/her bladder.
  • The cystometrogram (CMG) (said like: sis toe MET roe gram) - The test also shows how much sensation (feeling) there is in the bladder.
  • The electromyelogram (EMG) (said like: Ee leck troe MY loe gram )- The EMG shows how well the muscles of the buttocks work.
  • The voiding pressure study measures rate of voiding, while watching bladder and rectal pressures.

How the Test Is Done

The nurse will help your child lie down on a padded table. Parents will stay with their child while the test is being done.
  • Your child will wear a hospital pajama top and no underwear during the testing.
  • Your child’s “private area” will be cleaned with Betadine®, an antiseptic solution.
  • A sterile plastic tube (catheter) will be put into the urethra. This will remove any urine from the bladder. A numbing gel (local anesthetic) will be used before the catheter is placed.
  • The catheter will cause a feeling of pressure for a short time. It will be left in place until the testing is complete.
  • Another catheter will be put in the rectum. It will measure pressure in the abdominal muscles.
  • Small electrode stickers will be placed on the buttocks. This will not be painful for your child.
  • After the tubes are placed they are connected to a special computer, this will show us how well the bladder is working.
  • The bladder will be filled with water during the test.
  • Once the bladder is full, your child will be asked to pee (urinate).
  • When the test is over the tubes and stickers will be removed.
If you have any questions, be sure to ask your doctor or nurse, or call (614) 722-5801.
 

Image of female urinary system

Picture 1: The female urinary system.

Image of male urinary system

Picture 2: The male urinary system.

 

Urodynamics (PDF)

HH-III-59 11/82, Revised 12/14 Copyright 1996, Nationwide Children's Hospital

Nationwide Children's Hospital
700 Children's Drive Columbus, Ohio 43205 614.722.2000