Minimally Invasive Electrical Stimulation Device with Nerve-Proximal Electrodes

The patent transitions from traditional transcutaneous lead routing to subcutaneous implantation with electrodes positioned in close proximity to the target nerve. This dimensional change in electrode placement allows direct stimulation of deep peripheral nerves without requiring long, complex leads to traverse through tissue tunnels, thereby reducing lead size and implantation complexity while maintaining stimulation effectiveness.

The patent introduces a small, capsule-like implantable device as an intermediary between the external world and the target nerve. This miniaturized device contains integrated electrodes and circuitry that can be positioned close to the nerve, eliminating the need for large external leads and complex tunneling procedures while delivering effective electrical stimulation.

The patent employs multiple electrodes positioned at different locations relative to the nerve (including opposite sides) with different functional characteristics. Some electrodes are optimized for stimulation while others serve as references or return paths. This localized differentiation of electrode functions allows effective stimulation at lower amplitudes by optimizing the electric field distribution around the nerve.

The patent combines multiple electrodes and their associated circuitry into a single integrated implantable device. This merging of stimulation electrodes, reference electrodes, and control circuitry into one compact unit enables sophisticated electrode configurations (including bipolar and tripolar arrangements) that reduce stimulus amplitude requirements while maintaining manageable device complexity.

The patent segments the traditional lead-and-generator system into a miniaturized self-contained implantable device with integrated electrodes. This segmentation allows the device to have a small cross-sectional profile for minimally invasive subcutaneous implantation, while the electrodes extend or position themselves close to the target nerve through the small incision, achieving deep nerve stimulation without requiring a large device profile.

The patent replaces the mechanical tunneling system (large leads routed through subcutaneous tunnels) with a minimally invasive delivery system. The small implantable device is introduced through a small incision and positioned near the target nerve using refined placement techniques, eliminating the need for extensive mechanical tunneling and reducing the required device cross-sectional profile during implantation.