In dogs referred for the investigation of urinary incontinence, urethral sphincter mechanism incompetence (USMI) is the commonest diagnosis made in adults and is second only to ureteral ectopia in juveniles, particularly in females 1.

2018年6月22日 · Urethral Sphincter Mechanism Incompetence (USMI) (acquired urinary incontinence, mostly after spaying) is a diagnosis of exclusion once all other disorders have been ruled out. UI can be daily or episodic and range from mild to very severe. There appears to be a higher risk for larger breed dogs after spaying compared to small breeds.

2024年1月13日 · Diagnosis of the most common storage disorder in dogs, USMI, usually is established based on appropriate signalment, history, absence of abnormalities on physical examination, and response to appropriate therapeutic drug trials. However, if concurrent disorders are present (eg, EU), a UPP/CMG can be considered.

Urethral sphincter mechanism incompetence (USMI), ectopic ureters, paradoxical incontinence, detrusor hyperactivity, vestibulovaginal abnormalities, and neurologic disorders are all causes of urinary incontinence in dogs. Signalment, historical information, and the pattern of incontinence can lead to an accurate diagnosis most of the time.

Urethral sphincter mechanism incompetence (USMI) is a diagnosis of exclusion once all other disorders have been ruled out. UI can occur after spaying the female dog, and the onset of clinical signs can vary from immediately after spaying to 10 years after the surgery. Nocturia appears to be the most common complaint noted.

Dogs with USMI can be treated with the alpha-adrenergic receptor agonist phenylpropanolamine (2 mg/kg, PO, every 8–12 hours) or, in female dogs, estrogen compounds such as estriol (2 mg/dog, PO, every 24 hours for 14 days, then decreased to 1 mg/dog every 24 hours) or diethylstilbestrol (0.1–1 mg/dog, PO, every 24 hours for 5 days, then ...

USMI (Urethral Sphincter Mechanism Incompetence) is when the muscles inside your dog’s urethra become weak and unable to stop urine escaping (see diagram below). It’s often difficult to pinpoint the cause of USMI but there are several factors that can make it more likely, including:

Urethral sphincter mechanism incompetence (USMI) is the most common cause of acquired urinary incontinence in dogs. The pathogenesis of USMI is multifactorial and complex. Studies have shown variable results regarding the effects and …

Urethral incompetence is the most common reason for urinary incontinence in the dog. Management of these patients can start out as being relatively straightforward; however, many dogs need adjustments in their therapy as they age or develop additional health concerns.

Urinary incontinence, loss of voluntary control over the retention and expulsion of urine, is a common medical problem in small animal patients. Incontinence occurs when pressure within the bladder exceeds urethral pressure. USMI is the most common cause of urinary incontinence in adult female dogs ~80% of cases.