PDMS- and silver-ball-based flexible multichannel surface electrode: Fabrication and application in nerve conduction study on patients with diabetic polyneuropathy

Eun Joong Lee, Dong Hyun Baek, Ju Yeoul Baek, Byung Jo Kim, Jaesoon Choi, James Jungho Pak, Sang Hoon Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In this paper, we describe a multichannel surface electrode for measuring nerve conduction in patients with neuromuscular disorders. The electrode was constructed using a nontoxic, nonflammable poly(dimethylsiloxane) substrate and a contacting silver-ball electrode using a simple, cost-effective fabrication process. The fabricated electrode is sufficiently flexible and embossed to maintain excellent skin contact, while preventing interference from neighboring electrodes under the wet environment. It is also biocompatible, as demonstrated by the absence of skin problems after a one-week test. The electrical and mechanical properties and durability of the electrode were tested. The multichannel surface electrode was strong and durable, enduring repeated bending through 120° and resisting damage after four million repetitions in a bending test. The electrode surface was easily coated with conducting gel and recordings could be made under wet conditions without causing interference to neighboring electrodes. The enhanced impedance was comparable to that of a large commercial electrode and signals measured from the abductor pollicis brevis were noiseless. A quantitative investigation of the latencies of compound muscle action potentials in normal subjects and patients with diabetes mellitus was carried out to evaluate clinical applicability.

Original languageEnglish
Article number4897229
Pages (from-to)625-632
Number of pages8
JournalIEEE Sensors Journal
Issue number6
Publication statusPublished - 2009 Jun

Bibliographical note

Funding Information:
Manuscript received June 16, 2008; revised September 29, 2008; accepted September 29, 2008. Current version published April 29, 2009. This work was supported by a grant from the Korea Health 21 R&D Project, Ministry of Health and Welfare, the Republic of Korea (02-PJ3-PG6-EV10-0001). This work was supported by Grant M103KV010031-07K2201-03110 from the Brain Research Center of the 21st Century Frontier Research Program funded by the Ministry of Science and Technology, the Republic of Korea, and the Brain Korea 21 Project in 2008. The associate editor coordinating the review of this paper and approving it for publication was Prof. Evgeny Katz.


  • Biomedical electrodes
  • Impedance
  • Multichannel electrode
  • Muscle action potential
  • Polydimethylsiloxane (PDMS)

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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