NEUROSTIMULATORS

Neurostimulation System Components and Implantation

There are two types of neurostimulation systems: one that is completely internal (surgically implanted) and one with both internal and external components. For a totally implantable neurostimulation system, the power source (battery) and lead(s) are surgically implanted. In the other type of system, a radio-frequency receiver and leads are implanted, and the power source is worn externally with an antenna over the receiver.

Each neurostimulation system consists of:

• One or two leads which deliver electrical stimulation to the spinal cord or targeted peripheral nerve
• An extension wire which conducts electrical stimulation from the power source to the lead
• A power source which generates the electrical stimulation

The neurostimulation system is typically implanted in a two-stage procedure, separated by a trial screening period lasting approximately 1 to 10 days. Stage 1 involves implantation of a lead for trial screening, and Stage 2 involves implantation of the complete neurostimulation system (either the totally implantable system or the radio-frequency system).