Hi @nicky6969, leads are used in sacral nerve modulation. With sacral neuromodulation, a small device is inserted under your skin in your lower back. Small wires, called leads, send low-level, mild electrical impulses to your sacral nerves.

Located near the tailbone, these nerves help with sensation, and control the pelvic floor and the muscles related to bladder and bowel function. Bluetooth technology is used to control the device.

You can read more here: https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/nerve-stimulation-to-treat-urinary-incontinence