Reproducibility in nerve conduction studies and F-wave analysis

Pinheiro, Denise Spinola; Manzano, Gilberto Mastrocola; Nóbrega, J.A.M.

doi:10.1016/j.clinph.2008.05.006

Cited by 27 publications

(25 citation statements)

References 11 publications

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“…Our results showed inadequate specificity of lower limb MNCV reduction in patients with LFSN and normal sural SNAPs. These findings, in comparison with those relating to F‐wave latency may relate to the greater variability, and consequently, lower reliability, of MNCV, as previously demonstrated [22,23]. CMAP amplitude was otherwise unhelpful in our patients with LFSN and preserved sural SNAPs, and the same was true for the M/F ratio.…”

Section: Discussionsupporting

confidence: 67%

“…CMAP amplitude was otherwise unhelpful in our patients with LFSN and preserved sural SNAPs, and the same was true for the M/F ratio. The explanation for these results may also relate to the greater variability of CMAP amplitudes [23], as well as delayed reduction of these amplitudes in distal axonal polyneuropathies of initial exclusive sensory clinical expression.…”

Section: Discussionmentioning

confidence: 99%

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Electrophysiological markers of large fibre sensory neuropathy: a study of sensory and motor conduction parameters

Rajabally

Beri²,

Bankart

2009

Euro J of Neurology

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Electrophysiological markers of large fibre sensory neuropathy: a study of sensory and motor conduction parameters

Rajabally

Beri²,

Bankart

2009

Euro J of Neurology

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“…Correlations of data with a narrow range are sensitive to small differences of disagreement, even if these occur in only a few subjects, and particularly with small sample sizes [27]. Similar findings of lower correlation for ulnar latencies versus median latencies have been found in other studies that compared use of the NC-stat device to traditional methods [14,15,17] as well as in testeretest studies of traditional electrodiagnostic studies [26,28,29].…”

Section: Sensitivity Specificity and Roc Curvessupporting

confidence: 67%

Comparison of Automated Versus Traditional Nerve Conduction Study Methods for Median Nerve Testing in a General Worker Population

Dale¹,

Agboola

Yun

et al. 2014

PM&R

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Objective To investigate the validity of automated nerve conduction studies compared to traditional electrodiagnostic studies (EDS) for testing median nerve abnormalities in a working population. Design Agreement study and sensitivity investigation from two devices Setting Field research testing lab Participants Active workers from several industries participating in a longitudinal study of CTS. Methods Sixty-two subjects received bilateral median and ulnar nerve conduction testing across the wrist with a traditional device and the NC-stat automated device. We compared intermethod agreement of analogous measurements. Main outcome measurement Nerve conduction study parameters Results Median motor and sensory latency comparisons showed excellent agreement (intra-class correlation 0.85 and 0.80 respectively). Areas under the receiver operator characteristic curves were 0.97 and 0.96 respectively, using the optimal thresholds of 4.4ms median motor latency (sensitivity 100%, specificity 86%) and 3.9ms median sensory latency (sensitivity 100%, specificity 87%). Ulnar nerve testing results were less favorable. Conclusion The automated NC-stat device showed excellent agreement with traditional EDS for detecting median nerve conduction abnormalities in a general population of workers, suggesting that this automated nerve conduction device can be used to ascertain research case definitions of CTS in population health studies. Further study is needed to determine optimal thresholds for defining median conduction abnormalities in populations that are not seeking clinical care.

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“…They appear to be in the same range as the reproducibility of other electrophysiological variables, such as CMAP amplitude, nerve conduction velocity, and distal motor latency. (Kohara et al, 1999;Kong et al, 2006;Pinheiro et al, 2008). Fig.…”

Section: Discussionmentioning

confidence: 91%