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cystometry

A test used to assess the function of the bladder by measuring the pressure/volume relationship of the bladder. Indications: - urge incontinence - detrusor hyperactivity - urinary sensation - bladder capacity - bladder compliance Procedure: - insertion of a catheter into the bladder - in simple cystometry, sterile water is instilled into the bladder via a foley catheter (balloon NOT inflated) - filling of the bladder is continued until the patient feels a severe urge to urinate or involuntary bladder contractions begin - contractions can be seen as a rise & fall of the meniscus of the syringe used for instilling the sterile water into the bladder - if the urge to urinate or bladder contractions occur at a low bladder volume (< 250-300 mL), urge incontinence is likely (predictive value 74-91%).

Related

bladder catheterization urge incontinence

General

urodynamic testing

References

  1. nlmpubs.nlm.nih.gov/hstat/ahcpr/
  2. Geriatrics Review Syllabus, American Geriatrics Society, 5th edition, 2002-2004
  3. University of Michigna Health System Cystometrogram (CMG) http://www.med.umich.edu/1libr/urology/cystometrogram.htm