Robust and real-time monitoring of nerve regeneration using implantable flexible microelectrode array

Yong Ho Kim, Chungkeun Lee, Kang Min Ahn, Myoungho Lee, Yong-Jun Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a robust and quasi-real-time monitoring method for examining the degree of regeneration of peripheral nerves using a polymer-based implantable microelectrode array (IMA). The IMA was implanted in the sciatic nerves of rats using two different approaches: (1) direct implantation which was achieved by directly suturing to nerve stumps for short-term regeneration and (2) assembly implantation which was achieved by implanting the IMA assembled with a resorbable conduit that cross a 4-mm nerve defect. The regeneration of the injury was evaluated by measuring the nerve signals following foot pricking and impulse stimulating to the proximal stump. The direct implantation produced a peak voltage of 3.43 mV before amplification and a conduction velocity of 19.8 m/s. The assembly implantation produced a peak voltage of 1.51 mV and a conduction velocity of 18 m/s. The degree of regeneration was also examined using gait and morphological analyses. The sciatic function index was -38.5 ± 12.5 for direct implantation and -64.9 ± 7.5 for assembly implantation. The morphologies of the regenerated nerves were examined using toluidine blue, transmission electron microscopy images, and pilot tests. Te regeneration ratios after the direct and assembly implantation were 45% and 21%, respectively.

Original languageEnglish
Pages (from-to)1883-1887
Number of pages5
JournalBiosensors and Bioelectronics
Volume24
Issue number7
DOIs
Publication statusPublished - 2009 Mar 15

Fingerprint

Nerve Regeneration
Microelectrodes
Regeneration
Monitoring
Tolonium Chloride
Electric potential
Amplification
Rats
Sciatic Nerve
Polymers
Transmission Electron Microscopy
Gait
Peripheral Nerves
Foot
Transmission electron microscopy
Defects
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

Cite this

Kim, Yong Ho ; Lee, Chungkeun ; Ahn, Kang Min ; Lee, Myoungho ; Kim, Yong-Jun. / Robust and real-time monitoring of nerve regeneration using implantable flexible microelectrode array. In: Biosensors and Bioelectronics. 2009 ; Vol. 24, No. 7. pp. 1883-1887.
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Robust and real-time monitoring of nerve regeneration using implantable flexible microelectrode array. / Kim, Yong Ho; Lee, Chungkeun; Ahn, Kang Min; Lee, Myoungho; Kim, Yong-Jun.

In: Biosensors and Bioelectronics, Vol. 24, No. 7, 15.03.2009, p. 1883-1887.

Research output: Contribution to journalArticle

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