• J Neuroimaging · Jul 2017

    Prognostic Value of Nerve Ultrasound and Electrophysiological Findings in Saturday Night Palsy.

    • Antonios Kerasnoudis, Panagiota Ntasiou, and Efthymia Ntasiou.
    • Department of Neurology, St. Luke's Hospital, Thessaloniki, Greece.
    • J Neuroimaging. 2017 Jul 1; 27 (4): 428-432.

    Background And PurposeWe report on the prognostic role of the cross-sectional area (CSA) enlargement and conduction block (CB) in radial neuropathy (Saturday night palsy [SNP]).MethodsReference CSA values were defined in 30 healthy subjects. Twenty-four patients with SNP underwent evaluation (Thessaloniki Hypesthesia Score [THS], Medical Research Council [MRC], ultrasound, electrophysiology). All patients were followed up 3 months after initial presentation.ResultsDuring initial evaluation, 13 patients showed pathological CSA (pCSA) and 11 normal CSA (nCSA). Fourteen patients showed conduction block (pCB) and 10 showed no conduction block (nCB). The site of lesion was recognized in 11 patients in the spiral groove, in 8 patients in the distal main trunk, just before the division to motor and sensory branch, while 5 patients showed a double site of lesion (spiral groove and supinators' canal). During follow-up, the pCSA group showed a mean MRC score of 2.8 (SD ± .7) and a THS of 1.8 (SD ± .4), while the nCSA group showed a mean MRC score of 4.1 (SD ± .9) and a THS of .7 (SD ± .3) (P < .001) (Table 4). On the other hand, the pCB group showed a mean MRC score of 3.7 (SD ± 1.1) and a THS of 2.7 (SD ± .9), and the nCB group showed a mean MRC score of 4.2 (SD ± 1.2) and a THS of 1.7 (SD ± .9) (P = .355, P = .013, respectively).ConclusionsThe CSA enlargement, but not the CB, seems to have a negative prognostic role in patients with SNP.Copyright © 2016 by the American Society of Neuroimaging.

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