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Early sequential changes in bladder function after partial bladder outlet obstruction in awake sprague-dawley rats:
Yong-Jin Kang1, Long-Hu Jin, Chang-Shin Park
1Department of Urology, Inha University College of Medicine by BK 21 Project, Incheon, Korea.
Korean Journal of Urology
|January 5, 2012
Summary
Bladder outlet obstruction in rats initially causes decompensation, with over 60% showing dysfunction after one week. Later, bladders adapt, becoming larger and more compliant, reducing decompensation rates.
Area of Science:
- Urology
- Physiology
Background:
- Bladder dysfunction is a common clinical issue.
- Understanding initial functional changes is crucial for effective treatment.
Purpose of the Study:
- To investigate early functional changes in bladder decompensation.
- To objectively define decompensated bladder using residual urine volume percentage in awake, obstructed rats.
Main Methods:
- Partial bladder outlet obstruction (BOO) was induced in rats.
- Awake cystometry with simultaneous pressure recordings was performed 1 and 2 weeks post-surgery.
- Decompensated bladder defined as >20% residual volume to bladder capacity.
Main Results:
- BOO elevated basal pressure and threshold pressure (2 weeks).
- Bladder compliance decreased at 1 week and increased at 2 weeks post-BOO.
- Decompensation occurred in 62.5% of rats at 1 week and 33.3% at 2 weeks.
Conclusions:
- Bladders show serial changes in pressure and volume parameters following obstruction.
- Decompensated bladders can be identified by residual volume percentage.
- Later stages show compensated bladders with increased capacity and compliance.
