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The College of Veterinary Medicine

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Collagen Injections

Collagen Injections for treatment of Urinary Incontinence

The urinary bladder is the organ in which urine is collected and held until it is to be passed to the outside of the body through a small tube called the urethra. In a dog with a normal urinary tract this is a conscious activity. In an incontinent dog urine is often leaked out of the urethra during periods of rest or sleep.

Oral medications are a successful treatment in many cases, but some pets remain incontinent even with medical treatment. For those patients collagen injections may be the answer.

Here at the University of Tennessee we perform collagen injections under the lining of the urethra. During this procedure we insert a small camera into the urethra and through it we are able to perform the injections. The collagen bulks the area, increasing pressure at this part of the urethra. Also, collagen stimulates new blood vessel growth into the area and some scar tissue may form. These affects can all be important for the development of urinary continence. Collagen injections provide over 90% success rate with an average of 18 months of continence. Patients usually respond within a couple of days of the procedure. This may not be a permanent cure, but some dogs can be continent for up to 5 years after just one injection.

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