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Utilizing a handheld electrode array for localized muscle impedance measurements
Author(s) -
Narayanaswami Pushpa,
Spieker Andrew J.,
Mongiovi Phillip,
Keel John C.,
Muzin Stefan C.,
Rutkove Seward B.
Publication year - 2012
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.23307
Subject(s) - electrical impedance myography , biomedical engineering , electrode , reproducibility , electrical impedance , intraclass correlation , medicine , materials science , electromyography , physical medicine and rehabilitation , cardiology , chemistry , electrical engineering , chromatography , vasodilation , engineering
Electrical impedance myography (EIM) is a noninvasive technique used for assessment of muscle health in which a high‐frequency, low‐amplitude electric current is applied to the skin overlying a muscle, and the resulting surface voltage is measured. We have previously used adhesive electrodes, application of which is inconvenient. We present data using a handheld electrode array (HEA) that we devised to expedite the EIM procedure in a clinical setting. Methods: Thirty‐four healthy volunteers and 24 radiculopathy subjects underwent EIM testing using the HEA and adhesive electrodes. Results: The HEA was shown to have good test–retest reproducibility, with intraclass correlation coefficients as high as 0.99. HEA data correlated strongly with data from adhesive electrodes, ρ = 0.85 in healthy volunteers ( P < 0.001) and ρ = 0.75 in radiculopathy subjects ( P < 0.001). Conclusions: These data support the potential use of a handheld array for performing rapid localized surface impedance measurements. Muscle Nerve 46: 257–263, 2012