Electrical stimulation of sacral nerves and roots for control of the neurogenic bladder and bowel.

After damage to the spinal cord, some of the most frequent and severe complications are due to the neurogenic bladder and bowel, in spite of a variety of methods of management. Bladder and bowel emptying is usually impaired, but electrical stimulation of nerves surviving after spinal cord injury can produce controlled contraction of muscle, including the smooth muscle of the bladder and lower bowel, and this can be used to produce safe and effective bladder emptying on demand without catheters. It can also aid emptying of the bowel and reduce constipation. Hyper-reflexia of the bladder and lower bowel after spinal cord injury can produce reflex incontinence of urine and stool, and while this can sometimes be reduced by neuromodulation, it can be more predictably reduced by rhizotomy of the sacral sensory roots, while preserving the motor roots for stimulation. This combination of electrical stimulation and rhizotomy has restored bladder and bowel emptying and continence to several thousand patients, with reduced complications and improved quality of life over many years.