Electrical impedance myography in the diagnosis of radiculopathy.

Abstract:

INTRODUCTION:We sought to determine whether electrical impedance myography (EIM) could serve as a diagnostic procedure for evaluation of radiculopathy. METHODS:Twenty-seven patients with clinically and radiologically diagnosed cervical or lumbosacral radiculopathy who met a "gold standard" definition underwent EIM and standard needle electromyography (EMG) of multiple upper or lower extremity muscles. RESULTS:EIM reactance values revealed consistent reductions in the radiculopathy-affected myotomal muscles as compared with those on the unaffected side; the degree of asymmetry was associated strongly with the degree of EMG abnormality (P < 0.001). EIM had a sensitivity of 64.5% and a specificity of 77.0%; in comparison, EMG had a sensitivity of 79.7% but a specificity of 69.7%. CONCLUSIONS:These findings support the potential for EIM to serve as a new non-invasive tool to assist in diagnosis of radiculopathy; however, further refinement of the technique is needed for this specific application.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Spieker AJ,Narayanaswami P,Fleming L,Keel JC,Muzin SC,Rutkove SB

doi

10.1002/mus.23833

subject

Has Abstract

pub_date

2013-11-01 00:00:00

pages

800-5

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

48

pub_type

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