Figure 1.

Urodynamic testing with GNS. A dual lumen catheter is inserted through the urethra into the bladder, with one lumen used for measuring bladder pressure and the other lumen for filling with saline. A rectal balloon catheter measures abdominal pressure. The stimulator provides electrical stimulation across two surface electrodes placed on the dorsum of the penis, targeting the genital nerves. A host computer (PC) communicates with a data acquisition board (DAQ), which acquires the pressure signals and also triggers the stimulator device on command.