NDLI: Morphological and electrochemical properties of an explanted PtIr electrode array after 15 months in vivo

Content Provider	IEEE Xplore Digital Library
Author	Kohler, F. Stieglitz, T. Schuettler, M.
Copyright Year	2014
Description	Author affiliation: Dept. of Microsyst. Eng., Univ. of Freiburg, Freiburg, Germany (Kohler, F.; Stieglitz, T.; Schuettler, M.)
Abstract	We investigated the morphological and electrochemical properties of an explanted laser-machined 32 channel electrocorticogram (ECoG) electrode array made of platinum-iridium and silicone rubber. It was connected to a wireless brain-computer interface (BCI) and implanted in a sheep for more than 15 months. Recordings and stimulations of cortical activity were conducted over the whole period on a regularly basis. Currently, this is the longest in vivo study for this type of ECoG electrode array. Results were compared with an unused electrode array of same dimensions, material and production method. Visual inspections revealed no significant material alterations, despite organic residuals which could be easily removed though. Electrochemical impedance measurements also attested proper long-term stability of magnitude and phase, the difference between explanted electrode contacts and those of the unused array were found negligible.
Sponsorship	IEEE Eng. Med. Biol. Soc.
Starting Page	418
Ending Page	421
File Size	1154043
Page Count	4
File Format	PDF
ISBN	9781424479290
ISSN	1557170X
DOI	10.1109/EMBC.2014.6943617
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Arrays Contacts In vivo Materials Impedance Scanning electron microscopy
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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