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Related Experiment Video

Updated: Jun 16, 2026

Detrusor Underactivity Model in Rats by Conus Medullaris Transection
03:26

Detrusor Underactivity Model in Rats by Conus Medullaris Transection

Published on: August 28, 2020

Overactive bladder is not only overactive but also hypersensitive.

Seung Ryeol Lee1, Hyung Joon Kim, Ayoung Kim

  • 1Department of Urology, Yonsei University College of Medicine, Seoul, Korea.

Urology
|January 23, 2010
PubMed
Summary
This summary is machine-generated.

Patients with overactive bladder (OAB) have a more sensitive bladder, experiencing sensations at lower volumes. Lower current perception threshold (CPT) values in OAB patients indicate heightened bladder sensitivity.

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Last Updated: Jun 16, 2026

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Area of Science:

  • Urology
  • Neuroscience
  • Sensory Physiology

Background:

  • Overactive bladder (OAB) is a condition characterized by urinary urgency, often with frequency and nocturia.
  • Bladder hypersensitivity is thought to play a role in the pathophysiology of OAB, but its precise mechanisms require further elucidation.

Purpose of the Study:

  • To compare bladder filling sensations and current perception threshold (CPT) values between women with and without OAB.
  • To investigate the relationship between CPT values and voiding patterns in women with OAB.

Main Methods:

  • Filling cystometry was performed to assess bladder volumes at first sensation, first desire to void, and strong desire to void in 55 women with OAB and 42 controls.
  • Current perception threshold (CPT) was measured on bladder mucosa using neuroselective electrostimulation at 2000, 250, and 5 Hz.
  • Correlations between CPT values and voiding variables from 3-day bladder diaries were analyzed in OAB patients.

Main Results:

  • OAB patients demonstrated significantly lower bladder volumes for all filling sensations compared to controls.
  • CPT values were significantly lower in OAB patients across all tested frequencies, indicating increased sensory perception.
  • Lower CPT values correlated with a higher number of urgency and urge incontinence episodes in OAB patients.

Conclusions:

  • OAB patients exhibit a hypersensitive bladder characterized by earlier sensory perception.
  • These findings suggest that altered bladder sensory profiles contribute to the overactivity seen in OAB.
  • Bladder hypersensitivity may be a key factor in the development and manifestation of overactive bladder symptoms.