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Evaluation of long-term effects of endoscopic injection of collagen into the urethral submucosa for treatment of urethral sphincter incompetence in female dogs: 40 cases (1993–2000)

Andrea Barth Dr med vet1, Iris M. Reichler Dr med vet2, Madeleine Hubler Dr med vet3, Michael Hässig PD, Dr med vet, MPH4, and Susi Arnold PD, Dr med vet5
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  • 1 Section of Small Animal Reproduction, Department of Small Animals, Faculty of Veterinary Medicine, Zurich University, Winterthurerstrasse 260, 8057 Zurich, Switzerland.
  • | 2 Section of Small Animal Reproduction, Department of Small Animals, Faculty of Veterinary Medicine, Zurich University, Winterthurerstrasse 260, 8057 Zurich, Switzerland.
  • | 3 Section of Small Animal Reproduction, Department of Small Animals, Faculty of Veterinary Medicine, Zurich University, Winterthurerstrasse 260, 8057 Zurich, Switzerland.
  • | 4 Section of Small Animal Reproduction, Department of Small Animals, Faculty of Veterinary Medicine, Zurich University, Winterthurerstrasse 260, 8057 Zurich, Switzerland.
  • | 5 Section of Small Animal Reproduction, Department of Small Animals, Faculty of Veterinary Medicine, Zurich University, Winterthurerstrasse 260, 8057 Zurich, Switzerland.

Abstract

Objective—To evaluate long-term success of endoscopic injection of collagen into the urethral submucosa in female dogs with urinary incontinence caused by urethral sphincter incompetence.

Design—Retrospective study.

Animals—40 incontinent female dogs.

Procedure—Medical records were reviewed for outcome and other results for dogs in which a cystoscope was passed into the urethra for deposition of 3 collagen deposits into the submucosa.

Results—27 (68%) dogs were continent for 1 to 64 months (mean, 17 months) after the collagen injection. In another 10 dogs, incontinence improved and in 6 of these dogs, full continence was regained with administration of additional medication. In 3 dogs, incontinence was unchanged. As long as 12 months after injection, there was a deterioration in the initial result in 16 dogs, after which their condition stabilized. Mild and transient adverse effects developed in 6 (15%) dogs.

Conclusions and Clinical Relevance—Long-term success of endoscopic injection of collagen was satisfactory. Relapse of incontinence might be caused by flattening of the collagen deposits rather than resorption of the collagen. (J Am Vet Med Assoc 2005;226:73–76)

Abstract

Objective—To evaluate long-term success of endoscopic injection of collagen into the urethral submucosa in female dogs with urinary incontinence caused by urethral sphincter incompetence.

Design—Retrospective study.

Animals—40 incontinent female dogs.

Procedure—Medical records were reviewed for outcome and other results for dogs in which a cystoscope was passed into the urethra for deposition of 3 collagen deposits into the submucosa.

Results—27 (68%) dogs were continent for 1 to 64 months (mean, 17 months) after the collagen injection. In another 10 dogs, incontinence improved and in 6 of these dogs, full continence was regained with administration of additional medication. In 3 dogs, incontinence was unchanged. As long as 12 months after injection, there was a deterioration in the initial result in 16 dogs, after which their condition stabilized. Mild and transient adverse effects developed in 6 (15%) dogs.

Conclusions and Clinical Relevance—Long-term success of endoscopic injection of collagen was satisfactory. Relapse of incontinence might be caused by flattening of the collagen deposits rather than resorption of the collagen. (J Am Vet Med Assoc 2005;226:73–76)