Artificial Sphincter Pressure Versus Detrusor Leakage Pressure

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Abstract
Increasing urethra occlusion pressures were created with an artificial sphincter in fresh bladder-urethra specimens of adult pigs. Detrusor leakage pressures remained .apprx. 25% below the associated sphincter cuff pressures. The same reation was found when, during abrupt variations of cuff pressure, the detrusor leakage pressures were measured with antegrade urethral perfusion pressure measurement through a new sleeve catheter. Side-hole perfusion pressure mesurements showed 100% transmission of abrupt variations of cuff pressures to the inner urethral wall. No rotational differences could be detected. A probable pressure loss of .apprx. 25% must be taken into account when converting artificial sphincter pressures into bladder pressures at which leakage will occur.

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