Related Experiment Video
Updated: Sep 6, 2025

Detrusor Underactivity Model in Rats by Conus Medullaris Transection
Published on: August 28, 2020
THE CASE AGAINST urethral failure is not a critical factor in female urinary incontinence. Now what? The integral
1Mechanical and biomechanical engineering, University of Western Australia School of Engineering and Mathematical Sciences, Perth, Western Australia, Australia.
Abstract:
SUBJECT OF THE DEBATE: "Urethral failure is a critical factor in female urinary incontinence Now what?" The CASE FOR by Hokanson, DeLancey pinpointed inadequacy of bladder causation for urgency urinary incontinence (UUI) and poor urethral support for stress urinary incontinence (SUI) as responsible for long-standing lack of progress in incontinence science. They proposed "Urethral failure" as causation for SUI and UUI. The CASE AGAINST, by Peter Petros agrees "abnormal detrusor function as cause for (UUI) is a failed concept, and SUI surgery results are sometimes suboptimal, but rejects "urethral failure" as cause for UUI and SUI. In answer to, "Now what?," Petros presents the Integral Theory System. SUI and UUI are dysfunctions of the bladder's binary control mechanism, mainly ligament laxity because of defective collagen/elastin. The urethra is an emptying tube. Pelvic muscle forces reflexly contract against ligaments to close urethra, open it (micturition) and stretch the vagina underlying urethelial stretch receptors to mechanically support them, preventing premature activation of micturition (UUI). High validated cure rates for SUI and UUI by repair of weakened ligaments question viability of the "urethral failure" concept. CONCLUSIONS: The major achievement of this debate (both sides) is not what causes UUI or SUI, or what doesn't, though clearly, this is important. It is calling out a 50-year ossification of the whole construct of UUI, ranging from flawed definitions to systematic denial of known cures, all of which have stalled treatment of the one billion women who suffer with incontinence. The time has come for change.
More Related Videos
Related Concept Videos
Anatomy of the Genitourinary System II: Bladder and Urethra
Nursing Assessment of the Genitourinary System I: Health History
Physiology of the Genitourinary System III: Urine Concentration and Dilution
Introduction to Urinary System
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
The Micturition Reflex
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating...
Urinary Bladder
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...

