Programmer & Accessories

Implantable Leads¹

The VNS Therapy™ System uses a silicone-insulated lead to deliver the electrical signal from the pulse generator to the left vagus nerve. The latest generation of implantable leads includes:

• PerenniaDURA™ Lead 
• Model 303-20
• Model 303-30
• PerenniaFLEX™ Lead
• Model 304-20
• Model 304-30

The leads are bifurcated at one end, with two helical electrodes and an anchor tether, which are coiled around the vagus nerve. The other end has a single connector pin, which is tunneled subcutaneously to the chest pocket and inserted into the pulse generator. The leads are available in two sizes (2.0 mm and 3.0 mm) to accommodate different nerve sizes and ensure optimal fit.

Accessory Pack¹

The VNS Therapy™  Accessory Pack, Model 502 contains replacements for components of the lead and generator that may become unusable during routine surgery.

Each pack includes:

• Hex screwdriver: used to adjust the generator setscrew(s) and to allow the escape of back pressure created by lead insertion. A hex screwdriver is also provided with the pulse generator.
• Resistor assemblies (single and dual pin): used to perform the optional Generator Diagnostics (Pre-Implant Test) in cases of troubleshooting to verify that the generator is functioning properly, independent of the lead.
• Four tie-downs: used to secure the lead to fascia during implantation and to help form the strain-relief bend and loop. Tie-downs are also supplied with the leads.