Central and peripheral dual neuromodulation strategy in pain management of zoster-associated pain：a retrospective cohort study

Spinal cord stimulation (SCS) has shown effectiveness in relieving zoster-associated pain (ZAP), but some patients still experience moderate or severe pain after SCS treatment. This study aims to evaluate the impact of SCS combined with dorsal root ganglion (DRG) pulsed radiofrequency (PRF) as a dual neuromodulation strategy on the prognosis of ZAP.The clinical records of patients diagnosed with ZAP who underwent SCS (SCS group) or SCS combined with PRF (SCS + PRF group) at The Third Xiangya Hospital, Central South University, were retrospectively analyzed to compare the effectiveness of the two treatment approaches for ZAP. Outcome measures included changes in Visual Analog Scale (VAS) scores before and after neuromodulation treatment, response rates, and incidence of progression to postherpetic neuralgia (PHN).13 SCS patients and 15 SCS + PRF patients were analyzed. Admission VAS scores were similar (P = 0.934). Upon discharge, no significant differences in VAS or response rates were observed (P > 0.05). However, at 6-month follow-up, the SCS + PRF group had lower VAS scores (1.53 ± 1.06 vs. 3.23 ± 1.50, P < 0.001) and a lower proportion of residual moderate pain (P = 0.041). None in the SCS + PRF group progressed to PHN in the acute/subacute phases, differing significantly from the SCS group (P = 0.038).Therefore,SCS combined with DRG PRF is feasible and effective in the treatment of ZAP. This dual neuromodulation strategy may be a more appropriate regimen for the treatment of ZAP.