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Stimulation electrode with improved impedance characteristics to increase stimulation quality

Ref-No: TA-PVA11313


New electrode geometry or arrangement to improve the pulse quality of stimulation electrodes


Stimulating electrodes have become an indispensable part of modern medicine and are widely used in clinical practice, e.g. for pacemakers, defibrillators, cochlear implants and deep brainstem stimulation.


One of the main problems with implanted stimulation electrodes is the increasing impedance over time, which can result in signal transmission problems and loss of function. A frequent cause for the disturbance of the functionality of the electrodes can be traced back to the surrounding tissue. As a rule, the electrodes or implants are colonised with the body's own cells in the corresponding application site, e.g. within the cochlea, and thus grow in. On the one hand, this leads to a deterioration of the stimulation and, on the other hand, makes it extremely difficult to replace the implant (e.g. in case of isolation or breakage). The removal of the ingrown electrode can lead to additional injuries, which negatively influence the further healing (e.g. through scarring) and the functions of the corresponding place of use.


The present invention makes it possible to considerably facilitate the removability and implantation of the stimulation electrodes by means of an innovative electrical design. This task is solved by a special constructive design of the electrode geometry or arrangement. Compared to conventional stimulation electrodes, the innovation does not have individual ring electrodes, but a new type of surface spiral electrode with a staircase-shaped depth contour.When unscrewed, the spiral-shaped arrangement of the surface electrode makes it much easier to remove it from the surrounding tissue callus in the event of electrode failure, as it acts like a thread. When unscrewed, the spiral-shaped arrangement of the surface electrode makes it much easier to remove it from the surrounding tissue callus in the event of electrode failure, as it acts like a thread. Another advantage are the waists in the distal area, which locally reduce the surface moment of inertia. This reduces the system stiffness in these areas, which in turn significantly improves crossability in critical areas, e.g. in complex, anatomical geometric situations.In addition, the waists cover frequency ranges optimally and broadly, making the present electrode geometry very well suited for applications in the fields of cardiology, neurology and otology.

Another advantage is a cell adhesion-reducing surface coating of the electrode carrier and the electrodes, which improves their pushability, especially in the distal area.

Overall, the quality of therapy and thus patient safety is considerably improved by a particularly atraumatic geometry with a simultaneous increase in long-term functionality.


»  Improved release of the innovative electrode during exchange and

»  increased flexibility in the distal area due to spiral arrangement and micro/nano terracing

»  improved long-term functionality of the stimulation electrodes

»  Cell adhesion-reducing surface coating

Scope of application

Medical Technology, Medical Product, Electromedical devices


Companies are being sought for commercial use as well as for development cooperations.

Universität Rostock Service GmbH

Dipl.-Ing. Lars Worm
+49 381 498-9803
Parkstraße 6
18057 Rostock

Development status


Patent situation

  • DE pending

Offer at Providers website

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