Background: Ulnar nerve neuropathy is one of the most common entrapment neuropathies and is often considered to be one entity in clinical and follow-up studies.
Objective: The aim of this study was to determine whether there is a difference in the long-term outcome of patients with a severe motor conduction block (mCB) of ≥50% (50% group) in comparison to patients with a mCB of ≤20% (20% group).
Methods: In a prospective cohort of 244 patients with ulnar neuropathy at the elbow (UNE), 16% had a mCB of ≥50%. These patients were matched with respect to surgery, age and the severity of muscle weakness with patients with a mCB of ≤20%. Thirty-two patients per group were clinically and electrophysiologically evaluated.
Results:The median follow-up period was 25 months. Based on the patient¡¯s assessment, 26 (81%) patients in the 50% group and 14 (44%) patients in the 20% group had a good outcome (p=0.005). The clinical examination showed a good outcome in 27 (84%) in the 50% group and 13 (41%) in the 20% group (p=0.0008).
Conclusion: This study showed that the prognosis of patients with focal demyelination of the ulnar nerve presenting with a mCB of ≥50% is more favourable than those without a mCB.
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