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The effect of rectal distension on bladder function in patients with overactive bladder
Mohamed N Akl1, Kristina Jacob, Jennifer Klauschie
1Arizona Urogynecology, Mesa, AZ, USA. drmoakl@gmail.com
Neurourology and Urodynamics
|January 26, 2012
Summary
Rectal distension lowers bladder sensation volumes in patients with overactive bladder (OAB). This study found reduced desire to void and maximal capacity with rectal balloon distension.
Area of Science:
- Urology
- Gastroenterology
- Physiology
Background:
- Overactive bladder (OAB) significantly impacts patient quality of life.
- Understanding factors influencing bladder sensation is crucial for OAB management.
Purpose of the Study:
- To evaluate the impact of rectal distension on bladder sensation volumes.
- To assess changes in detrusor contractions during rectal distension in OAB patients.
Main Methods:
- Prospective randomized study involving patients with OAB symptoms.
- Multichannel urodynamic studies performed with and without rectal balloon distension.
- Comparison of bladder sensation volumes and detrusor contraction frequency.
Main Results:
- Rectal distension significantly reduced bladder sensation volumes: normal desire to void (139 vs. 197 ml), strong desire to void (260 vs. 330 ml), and maximal cystometric capacity (326 vs. 403 ml).
- No significant difference was observed in the number of detrusor contractions or the volume at which the first contraction occurred.
Conclusions:
- Rectal distension demonstrably lowers bladder sensation volumes in individuals experiencing OAB symptoms.
- These findings suggest a potential interaction between rectal and bladder afferent pathways in OAB.
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