Description of an alternative method for the electrodiagnostic evaluation of the sensory radial nerve

IF 2.7 4区医学 Q2 CLINICAL NEUROLOGY Neurophysiologie Clinique/Clinical Neurophysiology Pub Date : 2025-02-06 DOI:10.1016/j.neucli.2025.103058

Martin Moussy , Julie Rode , Thierry Maisonobe , Nagham Khanafer , Françoise Bouhour , Antoine Pegat

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Abstract

Objectives

The aim of this study was to describe an alternative method for the electrodiagnostic (EDX) evaluation of the sensory radial nerve (SRN).

Methods

In this retrospective study, all patients from a French EDX center (November 2022-April 2023) for whom SNAP amplitudes of the same SRN were obtained through both a conventional and an alternative method were included. In the conventional method, the active recording electrode was placed at the base of the snuff box, whereas in the alternative method, it was placed 3-4 cm proximally on the lateral border of the radial bone. The SNAP amplitudes of both methods were compared and the ratio of alternative to conventional amplitude was determined within the same patient. A secondary objective was to compare SNAP amplitudes and ratios between patients with peripheral neuropathy and those without (control group).

Results

Among the 117 patients included, the mean ± SD SNAP amplitude was 50.0±28.9 µV in the alternative method compared to 31.0±17.9 µV in the conventional method. The ratio of alternative to conventional amplitudes was 1.64±0.4 in all patients. No significant difference in amplitude ratios was found between the peripheral neuropathy group (1.63 ± 0.4) and the control group (1.65 ± 0.3; p =0.75).

Discussion

The alternative method, based on a more proximal placement of the recording electrodes, consistently provided larger SNAP amplitudes than the conventional method. This method could be useful in particular clinical settings but could prove more challenging in obese or muscular patients.

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来源期刊

Neurophysiologie Clinique/Clinical Neurophysiology 医学-临床神经学

CiteScore

5.20

自引率

3.30%

发文量

审稿时长

60 days

期刊介绍： Neurophysiologie Clinique / Clinical Neurophysiology (NCCN) is the official organ of the French Society of Clinical Neurophysiology (SNCLF). This journal is published 6 times a year, and is aimed at an international readership, with articles written in English. These can take the form of original research papers, comprehensive review articles, viewpoints, short communications, technical notes, editorials or letters to the Editor. The theme is the neurophysiological investigation of central or peripheral nervous system or muscle in healthy humans or patients. The journal focuses on key areas of clinical neurophysiology: electro- or magneto-encephalography, evoked potentials of all modalities, electroneuromyography, sleep, pain, posture, balance, motor control, autonomic nervous system, cognition, invasive and non-invasive neuromodulation, signal processing, bio-engineering, functional imaging.