The objectives of this study were to evaluate the sensitivity and specificity of atypical nociceptive processing (reduced local, remote or global pressure pain thresholds PPTs) in patients with cervical facet-mediated pain who reported a successful response to radiofrequency coagulation (RFC) 1-month post-procedure.
Measures of atypical nociceptive processing (reduced local, remote or global PPTs) failed to detect cervical facet-mediated pain that successfully responded to RFC, in up to 30% of people. In addition, significant false-positive rates were demonstrated, which would result in excessive unsuccessful diagnostic blocks being performed. Local, remote and global PPTs all demonstrated similar diagnostic accuracy in predicting 1-month successful response to RFC.
Based on these results, we demonstrate that atypical nociceptive processing as measured with PPTs does not accurately diagnose cervical facet-mediated pain that demonstrates subsequent successful response to RFC at 1-month. As such, diagnostic blocks remain the most accurate method in determining prognosis for succesful response to RFC.
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