New Developments in Brain Pacemaker Technology

The most important technological development in deep brain stimulation is the change in electrode configuration and the ability it provides to stimulate the desired region of the target. While conventional quadripolar electrodes deliver stimulation in a spherical pattern at the target, the new generation of multi-contact electrodes (directional electrodes) offer the ability to stimulate in different directions within the target (Figure 6).

This makes it possible to prevent stimulation of neighboring anatomical structures and keep stimulation-related side effects to a minimum. Another recent development is closed-loop stimulation. With closed-loop stimulation, the stimulation parameters are adjusted according to the patient's needs — in other words, "adaptive stimulation" is achieved.

Wireless Brain Pacemaker Systems: Promising Technologies

Technological efforts are known to be focusing on minimizing infectious complications and impedance problems caused by the neurostimulator and extension cables. In particular, antibiotic-impregnated hardware or silver-coated systems could be manufactured to prevent infectious complications.

Beyond all of this, electrodes could be integrated with a neurostimulator fixed directly to the cranium — with no extension cable required — thanks to the development of much smaller neurostimulators. This would result in a more minimally invasive surgical procedure for patients and a significant reduction in hardware-related complications. Undoubtedly, another expectation is that the lifespan of neurostimulators will be extended through ongoing research and development. Wireless energy transfer is another anticipated development.

Robot-Assisted Surgery in Brain Pacemaker Implantation

A study published in 2016 demonstrated that robot-guided stereotactic interventions achieved entry points in the cranium and target accuracy with significantly lower error margins compared to frameless stereotactic techniques. Building on this finding, we should not lose sight of the fact that robot-assisted techniques in DBS surgery will soon be discussed far more frequently.

Innovations That Extend the Life of the Brain Pacemaker

Rechargeable batteries are now very widely used, with an estimated lifespan of approximately 20–25 years. Depending on the patient's stimulation settings, charging is required several times per week. Undoubtedly, another expectation is that the neurostimulator lifespan will be extended through ongoing research and development efforts. Wireless energy transfer is another anticipated advancement.

Treatment Efficacy and Patient Comfort

- Can be effective in patients who do not respond to medication or are adversely affected by its side effects. - Can significantly reduce symptoms and improve quality of life. - It is a reversible method — stimulation can be stopped or electrodes removed if desired. - Can reduce the need for medication.