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68th Annual Meeting of the German Society of Neurosurgery (DGNC)
7th Joint Meeting with the British Neurosurgical Society (SBNS)

German Society of Neurosurgery (DGNC)

14 - 17 May 2017, Magdeburg

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Comparison of battery-life of non-rechargeable generators in Deep Brain Stimulation Kinetra versus Activa-PC

Meeting Abstract

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  • Ann-Kristin Helmers - UKSH Kiel, Klinik für Neurochirurgie , Kiel, Deutschland
  • Isabell Lübbing - UKSH Kiel, Klinik für Neurochirurgie , Kiel, Deutschland
  • Karsten Witt - UKSH Kiel, Klinik für Neurologie, Kiel, Deutschland
  • Michael Synowitz - UKSH Kiel, Klinik für Neurochirurgie , Kiel, Deutschland
  • Hubertus Maximilian Mehdorn - UKSH Kiel, Klinik für Neurochirurgie , Kiel, Deutschland
  • Daniela Falk - UKSH Kiel, Klinik für Neurochirurgie , Kiel, Deutschland

Deutsche Gesellschaft für Neurochirurgie. Society of British Neurological Surgeons. 68. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), 7. Joint Meeting mit der Society of British Neurological Surgeons (SBNS). Magdeburg, 14.-17.05.2017. Düsseldorf: German Medical Science GMS Publishing House; 2017. DocP 158

doi: 10.3205/17dgnc721, urn:nbn:de:0183-17dgnc7216

Published: June 9, 2017

© 2017 Helmers et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

Text

Objective: The operative change of non-rechargable generators after DBS-surgery is necessary after several years. Since 2008 a new generation of Medtronic generators is available and the non-rechargeable Activa-PC replaced the Kinetra. From a clinical view the hypothesis was generated that Kinetra has a longer battery-life than Activa-PC. The aim of this study was to verify these findings.

Methods: We retrospectively captured the battery-life of every single patient after implantation of DBS electrodes and generators between 2005 and 2012 in our department due to Parkinson´s disease and compared the battery-life of the Kinetra- and the Activa PC groups. To calculate the current usage, the total energy delivered (TEED) was estimated for each patient using stimulation parameters one year after electrode implantation and compared the TEED in both groups.

Results: 192 patients could be included in the study, among those 105 with Kinetra generators and 86 with Activa-PC generators. The mean battery-life of the Kinetra was significant longer (5,439 ± 0,199 y) than of the Activa PC (4,438 ± 0,165 y) (p = 0,023). The mean TEED without impedance for the Kinetra group was 219.903,1 ± 121.531,0 W * Ohm and for the Activa-PC group 145.132,1 ± 72.672,9 W * Ohm, which implied significant lower stimulation parameters in the Activa PC group (p = 0,00038).

Conclusion: A significant shorter battery-life of the new generator Activa-PC in comparison to the older model Kinetra was shown. Since higher battery consuming stimulation parameters as a reason could be excluded, a shorter battery-capacity is probable. Reasons for this e.g. the smaller size of the new implant, new functions or other causes could not be revealed by this study.