Abstract
Objective To compare the sensitivity of sensory nerve conduction studies recorded with near-nerve technique (NNT) and surface electrodes in polyneuropathy. Methods A total of 566 sural nerves in 287 consecutive patients aged 18–91 years referred with the suspicion of polyneuropathy were studied prospectively. All nerves were examined with orthodromic NNT from lateral malleolus to sura and with antidromic surface recording from sura to lateral malleolus. The sensitivities were compared with chi-square statistics. Results The overall conclusion of NCSs was polyneuropathy in 157 and no signs of polyneuropathy were found in 130 patients. In patients with no polyneuropathy, sural nerve was normal both with surface electrodes and NNT in 254 (98%) of 258 sural nerves without any significant difference. In patients with polyneuropathy, surface recordings and NNT showed significant difference in 308 sural nerves examined ( p Conclusion Near-nerve recordings of the sural nerve are more sensitive than surface recordings in the diagnosis of polyneuropathy. Key message Near-nerve technique may be recommended in electrodiagnosis of polyneuropathy.
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