Near-nerve versus surface electrode recordings of sural nerve in patients with polyneuropathy

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• 作者：H. Tankisi ; M.A. Kural ; K. Pugdahl ; A. Fuglsang-Frederiksen
• 刊名：Clinical Neurophysiology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：127
• 期：3
• 页码：e35
• 全文大小：33 K

文摘

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 < 0.001). There was absent response in 99 nerves (32%) with surface electrodes and in 4 nerves (1%) with NNT. Sural nerve was normal in 123 (40%) with surface electrodes and in 59 (19%) with NNT.

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.