Figure 7
Simulation of the effects of electrode geometry on activation of the trunk and lateral branches of the DNP. (A) Lateral view of penile urethra from finite element model with simulated DNP branch locations (Figure 1). Each branch location was randomly varied between ± 1 cm along the urethra from the locations shown. (B) Maximum AFs evoked at the DNP trunk and in the DNP branches by stimulation at 2 cm from the urethral meatus. (C) Maximum AFs for the 1 mm ring and 3-ring electrodes only. The maximum branch AF ("Branch 1") was omitted for easier comparison of the AFs evoked by the different electrodes. (D) Selectivity and AF ratio for the ring electrode compare to the 3-ring electrode.