Urodynamic study

What is a urodynamic study (UDS)?

  • It is an examination that assesses the function of the bladder and sphincter.
  • It records volumes, pressures, flow rates and possibly electrical activities of the pelvic floor muscles.
Why make a urodynamic study (UDS)?
The urodynamic study is not a routine examination. It is requested when the clinical examination and simple examinations did not make it possible to understand the malfunction of your bladder. When a urinary incontinence is persistent despite medical treatment (overactive bladder). The exam is also performed before making an intravesical botox treatment

Evaluate a neurogenic bladder secondary to a neurological disorder. To highlight the abnormalities of nerve control of the urinary bladder and sphincter.

Before being operated on a urinary incontinence or in case of failure of an earlier treatment of a sling. To analyze complex defects of bladder function, for example, a bladder emptying disorder in the case of a hypersensitive bladder.
How is an urodynamic study performed?
The exam is conducted by a nurse in a room in one of Dr Marois' clinics. It is useless to be fasting. It begins with an examination of your symptoms and a clinical examination of your perineum. It lasts 30 to 45 minutes in three parts: filling (cystometry), emptying (flow measurement) and evaluation of the urethra (urethral profile).

It requires to put in place a very fine probe in the bladder through the urinary meatus. This probe will fill the bladder with sterile water and simultaneously record the pressure. A small probe is also introduced into the rectum through the anus. For the study of neurological diseases of the bladder, it is sometimes useful to record the electrical activity of the perineal muscles. This is done by two pasted patches placed on the perineum.

The examination is unpleasant but not painful. The passage of the probes simply causes a slight discomfort. It is important to relax to the maximum. All the precautions are taken to put you at ease and respect your intimacy. You should report everything you feel during the exam, such as the slight urge to urinate, the urge to urinate, the urge to urinate, and the urge to urinate.

1- Cystometry (first part of the urodynamic study). It consists of recording the pressures in the bladder during its filling. The exam is performed in a particularly semi-sitting position, sitting, lying down or in a gynecological position for both women and men. It records involuntary contractions of the bladder. The behavior of the bladder during the filling is then evaluated.

2 - Flow measurement (second part of the urodynamic study) It consists of urinating in a support adapted as a toilet that record the power of your jet and urine volume. It is recommended to urinate as usual and try to relax. In order for the test to be interpreted correctly, you must have urinated enough. You must avoid having the bladder too full which can disrupt the functioning of your bladder or cause a blockage.

3- The urethral profile (third part of the urodynamic study) It consists in analyzing your sphincter. The urethral probe is removed gradually. It is important to relax as much as possible, not to move or talk during this time.
What are the risks and complications of an urodynamic study?
Urinary tract infection is the most common complication despite the fact that all the material used is sterile and that all hygiene and aseptic precautions are taken to minimize this risk.

In case of heavy bleeding, fever, difficulty in urinating, persistent burns, bladder pain, urine disorders "strong smell", do not hesitate to notify the clinic of Dr Marois.

Exceptionally, a urinary infection can occur. She will be treated effectively by Dr Marois, with a few days of antibiotics.
How to prepare for an urodynamic study?
Two weeks before your appointment, be sure to stop the bladder medicines (Ditropan, Toviaz, Myrbetriq) prescribed for the bladder.

Drink two glasses of water one hour before the exam and do not urinate before taking the exam. Arrive with a bladder filled but not too full. A urine test is required before doing the examination if not a rapid test (urine test strip) on your urine just before the exam. A Urodynamic study cannot be performed in case of untreated urinary tract infection. In the case of urinary infection, your examination may be postponed.

Be sure to let us know if you have allergies to LATEX.
What are the recommendations after an urodynamic study?
The passage of the catheter can irritate your urethra and bladder. You may feel some burning or discomfort when you urinate the day and the day after the exam.

It is recommended to drink a lot of water after the exam to avoid a urinary infection (to naturally wash the bladder).

Request an Appointment

Dr. Marois is a urologist who is not a member of the Régie d’Assurance Maladie du Québec (RAMQ). As such, the clinic can not claim the RAMQ for the payment of his services. If you consult Dr Marois, you must pay for the services rendered.

Cancellation of appointment:

To ensure the smooth running of the clinic and a minimum of courtesy towards other patients and our staff, we ask you to notify us 48 hours in advance for the cancellation of a consultation, 5 working days in advance for a surgery at the office and 21 working days in advance for a major surgery. If these deadlines are not respected, a cancellation fee of 50% of the service will be charged.

Change of appointment:

We understand that events occur, so we ask you to provide us with at least a 24-hour notice for any change in their appointment; we will be happy to accommodate you, the best we can. However, if you fail to inform us within this timeframe or do not show up, we will charge a $ 100 fee.

Thank you for your understanding.

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