Many female dogs (especially large and giant breeds) develop sphincter mechanism incompetence. Approximately 80% of mature dogs referred for investigation of urinary incontinence are diagnosed with urethral sphincter mechanism incompetence (USMI) – failure of the ‘valve’ of the bladder neck and urethra to prevent urine leakage. Urinary incontinence due to sphincter mechanism incompetence is common in adult female dogs, and uncommon in males.

It is important to speak to your veterinarian if your pet has exhibited urinary … Urinary incontinence is the involuntary action that results in urine leakage.
Urine leakage usually occurs when the animal is relaxed and lying down. Incontinence causes the animal great distress as well; they do not wish to urinate in the house or on their bed, yet cannot control their own bodily functions properly. Weber U T, Arnold S, Hubler M et al (1997) Surgical treatment of male dogs with urinary incontinence due to urethral sphincter mechanism incompetence. Vet Surg 26 (1), 51-56 PubMed. while walking) excludes this as … URINARY INCONTINENCE IN DOGS UROLOGY/NEPHROLOGY Dennis J. Chew, DVM, DACVIM Primary Sphincter Mechanism Incompetence (PSMI) PSMI is the most common cause of urinary incontinence in adult female dogs seen in primary care practice.1 Incontinence in spayed female dogs previously was called hormone-responsive, or estrogen-responsive, Urinary Incontinence in the Dog FACT SHEET: Urinary Incontinence in the Dog Micturition depends on the coordinated action between the sympathetic, parasympathetic and somatic nervous systems and central control centers.

It occurs most commonly in large-breed bitches. Any other timing of incontinence (i.e. But the question isn’t “Can my primary care doctor do the cystoscopy?” but rather “Is my primary care doctor the best person to perform the cystoscopy?” The take-away message about urethral sphincter mechanism incompetence… Urine leakage secondary to USMI is a commonly condition in dogs, particularly spayed females. Urinary Incontinence: Natural Treatment Options for Dogs When a companion begins to drip or leak urine, it can cause great concern for the animal's guardian. Primary sphincter mechanism incompetence (USMI or Spay Incontinence) is a form of incontinence which typically occurs in adult, spayed female dogs and is characterized by incontinence that occurs only when laying down. Aaron A, Eggleton K, Power C et al (1996) Urethral sphincter mechanism incompetence in male dogs - a retrospective analysis of 54 cases. This is a common cause of urinary incontinence in dogs, especially neutered bitches, although castrated male dogs and entire animals can also be affected.SMI is most commonly seen as an acquired condition, but may also be seen as a congenital problem in young animals.Congenital SMI may occur in conjunction with anatomical defects such as ureteral ectopia and intersexuality.