Interpretation of Urodynamics consist of the 3 C’s and 2 S’s.  The 3 C’s referring to Capacity, Compliance and Competence of the sphincter.  The 2 S’s referring to Sensation and Stability.

Bladder capacity is studied to determine the amount of fluid the bladder holds.  Compliance is the ability of the bladder wall to distend.  The relationship between change in the bladder volume and change in the detrusor pressure is measured.  The EFP or (End Filling Pressure) should be below 15cnH20.   The EFP or (End Filling Pressure) of 40cmH20 or greater may lead to high risk to upper tract.  Competence of the sphincter is the ability of the external striated muscle to hold urine and to relax and release urine.  This can be evaluated by using VLPP (Valsalva Leak Point Pressure).  The VLPP is automatically marked and calculated with a simple key stroke.

Sensations of the patient are recorded during the filling phase.  The sensations of a patient are affected by volume, pressures and psychosocial environment.   The Morpheus has conveniently placed study markers to indicate these sensations according to ICS.

Stability refers to the detrusor function during filling.  Normal detrusor function allows bladder filling with little or no change in pressure.  Detrusor Overactivity is a urodynamic observation characterized by involuntary detrusor contractions during the filling phase which may be spontaneous or provoked.  Convenient study markers are easily placed during the study with a click of a button or tap of the touch screen.

Written by
Denise D’Andrea
Director of Clinical Services
The Prometheus Group