Canine Urethral Pressure Profile

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Abstract
SUMMARY: Urethral pressure profiles were recorded in seven normal female and six normal male dogs. Each dog was immobilized with xylazine, and a catheter (continuously infused with saline solution) was placed into the bladder through the urethra and withdrawn at a fixed rate. Pressure changes were recorded, and the resulting graphs provided values for pressures within the urethra. Nomenclature used to describe the urethral pressure profile was standardized according to the International Continence Society's recommendations. The maximum urethral closure pressures in the female dogs were between 13.0 and 46.0 mm of Hg (mean of 23.9 ± sd 11.8 mm of Hg). There was a significant difference (P < 0.025) in the maximum urethral pressures of nulliparous female dogs less than 2 years of age when compared with those of older female dogs. The maximum urethral closure pressures in the male dogs were between 25.0 and 36.0 mm of Hg (mean of 28.3 ± sd 4.0 mm of Hg).