FIGURE 1. Pressure-flow study and derived voiding parameters.
Representative cystometry tracings showing the vesical pressure (Pves), abdominal pressure (Pabd), detrusor pressure (Pdet), urethral flow (Flow), voided volume (Vvod), infused volume (Vinf), and intra-vesical volume (Vive). Although coughs (arrows) and Valsalva maneuvers (triangles) induce marked fluctuations in the Pves and Pabd, they exhibit trivial effect on the Pdet. The Pdet, Flow, Vvod, Vinf, and Vive marked by the red bar at the bottom are displayed using a faster time-base below. (B) Derived voiding parameters including the mean voiding pressure (Pv), the voided volume (Vv), and the voiding time (Tv).