Urodynamic Investigation

Urodynamic investigations are tests that assess the function of your bladder and the bladder outflow tract (urethra).

During the tests, your bladder is filled and then emptied while pressure readings are taken from the bladder and the abdomen.

The idea is to replicate your symptoms with this test and then determine their cause.

Before the Test

  • You will receive a phone call, fax, email or letter detailing your appointment time

  • You will be asked to fill in a voiding diary for two days before the test.

  • Arrive at the centre with a comfortably full bladder.

  • A bladder symptom questionnaire will be given to you to fill out.

When You Arrive

  • The test will be explained to you and a gown provided for you to change into.

Patient Info Sheets

  1. Pelvic Floor Exercises
  2. Urinary Urge & Frequency
Dr. Harvey Ward
Dr. Harvey Ward
MMed (O&G) (Stell), LMCC, FRANZCOG
UGSA Member
Meagan Kelly
Meagan Kelly
B.Phty. (U. of Q),
Continence Advisor

The Test

Flow Rate

  • An ultrasound exam will be performed vaginally to assess bladder movement.

  • Then, you will be required to empty your bladder (in private) into a special toilet that records the flow. A computer charts this.

Urine Analysis

  • A sample is taken and tested to exclude infection.

  • A gentle internal examination is then performed to feel your pelvic floor strength and a small soft catheter is used to drain the bladder completely.

Filling the Bladder Test

  • In order to see how your bladder pressure changes, two fine plastic tubes (catheters) are inserted, one in the bladder and one in the rectum.

  • Sterile fluid is run into the bladder and may feel cold but not sore.

  • You will be asked when you feel the sensation of fullness, your ability to hold on and if you have a strong urge to void.

  • You will be asked to cough and move when lying down or standing.

Full Bladder

  • Filling will continue until you have reached capacity and the test will stop.

  • You will use the special toilet to empty your bladder again, this time with the small tubes still in place. The test is designed to reproduce your symptoms so don't worry if you leak!

An appointment will then be made for you to discuss the result and appropriate treatment.

Contact Details

AddressSuite 209
Specialist Medical Centre
343 Pacific Hwy
Coffs Harbour NSW 2450

Telephone(02) 6652 1266

Facsimile(02) 6650 9566


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Frequently Asked Questions

How long will the test take?30 to 60 minutes.

Is it painful? Uncomfortable, but not normally painful.

Will it cure me? No, it is only diagnostic.

Are there any possible complications? Infection, stinging or burning of the area after the test can sometimes occur. Make sure your fluid intake is adequate. If the symptoms persist, see your GP. Occasionally there is a small amount of blood in the urine because of catheter irritation.