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Observational Studies01:11

Observational Studies

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Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
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  11. Congenital Urethral Sphincter Mechanism Incompetence: Observational Clinical Findings And Treatment Outcomes-a Small Retrospective Study In 19 Bitches.
  1. Home
  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Veterinary Sciences
  9. Veterinary Medicine (excl. Urology)
  11. Congenital Urethral Sphincter Mechanism Incompetence: Observational Clinical Findings And Treatment Outcomes-a Small Retrospective Study In 19 Bitches.

Related Experiment Video

Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements
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Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements

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Congenital urethral sphincter mechanism incompetence: observational clinical findings and treatment outcomes-a small retrospective study in 19 bitches.

Pierre Langer1, Charles Porsmoguer2, Géraldine Bolen2

  • 1Department of Companion Animal Clinical Sciences, Faculty of Veterinary Medecine, University of Liège, Liège, Belgium. pierre.langer@uliege.be.

Acta Veterinaria Scandinavica
|January 22, 2026

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
Congenital urethral sphincter mechanism incompetenceDogIncontinenceNeutering

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Congenital urethral sphincter mechanism incompetence (CUSMI) in juvenile female dogs shows a low initial response rate to phenylpropanolamine treatment. Incontinence may worsen after neutering, even in dogs that initially improved.

Area of Science:

  • Veterinary Medicine
  • Canine Urology
  • Pharmacology

Background:

  • Congenital urethral sphincter mechanism incompetence (CUSMI) affects juvenile female dogs, causing urinary incontinence.
  • The response rate of CUSMI in dogs to sympathomimetic drugs like phenylpropanolamine is not well-documented.
  • This study reports clinical findings and treatment outcomes for CUSMI in a canine population.

Purpose of the Study:

  • To evaluate the clinical findings and treatment outcomes for congenital urethral sphincter mechanism incompetence (CUSMI) in juvenile female dogs.
  • To assess the response rate to phenylpropanolamine treatment in bitches with CUSMI.
  • To investigate the impact of neutering on incontinence in bitches with CUSMI.

Main Methods:

  • Retrospective observational study including juvenile bitches diagnosed with CUSMI.
Urodynamics
  • Diagnosis based on history, clinical signs, orthotopic ureters, and urethral pressure profilometry.
  • Treatment with oral phenylpropanolamine (1.5 mg/kg SID) for at least one month, with short-term and long-term follow-up via clinical recheck and owner questionnaires.

    • Main Results:

    • Nineteen bitches were included; 17 were neutered during the study.
    • Phenylpropanolamine treatment resulted in a significantly higher continence score post-treatment compared to diagnosis (median 4 vs. 2).
    • Only 26% of bitches achieved full continence at short-term follow-up; 6/19 at long-term follow-up, with 5 receiving additional treatment. Worsening incontinence was reported in 5/17 bitches after neutering.

    Conclusions:

    • Congenital urethral sphincter mechanism incompetence (CUSMI) in dogs demonstrates a low initial complete response rate to phenylpropanolamine compared to acquired cases.
    • Neutering may potentially worsen incontinence in some bitches, even those showing temporary improvement before or during estrus.
    • Further research is needed to optimize management strategies for CUSMI in female dogs.