title: Ultrasound-guided pulsed radiofrequency treatment of the cervical sympathetic chain for complex regional pain syndrome: A retrospective observational study.
abstract: The stellate ganglion is a common target to manage neuropathic pain in the upper extremities. However, the effect duration of a single stellate ganglion block is often temporary. To overcome the short-term effects of a single sympathetic block, pulsed radiofrequency (PRF) can be applied. The aim of the present study was to investigate the efficacy of PRF on the cervical sympathetic chain under ultrasound guidance for complex regional pain syndrome (CRPS).Twelve CRPS patients who underwent PRF on the cervical sympathetic chain were enrolled in this retrospective analysis. Under ultrasound guidance, PRF was performed for 420 seconds at 42°C on the C6- and C7-level sympathetic chain.The pain intensity decreased significantly at 1 week after the procedure. Overall, 91.7% of patients experienced at least moderate improvement. A positive correlation was observed between the extent of pain reduction at 1 week after PRF and the degree of overall benefit (r = 0.605, P = 0.037). This reduction in symptoms was maintained for a mean of 31.41 ± 26.07 days after PRF. There were no complications associated with this procedure.PRF on the cervical sympathetic chain, which can be performed easily and safely under ultrasound guidance, should be considered an option for managing CRPS of the upper extremities.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Daejeon St. Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Korea Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Eung Don
authors.initials: ED
authors.lastname: Kim
authors.forename: Woo Joo
authors.initials: WJ
authors.lastname: Yoo
authors.forename: Yoo Na
authors.initials: YN
authors.lastname: Kim
authors.forename: Hue Jung
authors.initials: HJ
authors.lastname: Park
mesh_terms: D000328:Adult; D020918:Complex Regional Pain Syndromes / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy; D005260:Female; D005728:Ganglia, Sympathetic / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement / Q000379:methods; D061208:Pulsed Radiofrequency Treatment / Q000379:methods*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014463:Ultrasonography / Q000379:methods; D034941:Upper Extremity / Q000294:innervation / Q000503:physiopathology