Abstract:Objective:To observe the short-term efficacy and safety of modified therapy of pulsed radiofrequency (PRF)on the stellate ganglion for treating Post Herpetic Neuralgia(PHN)in the head, face, neck or upper limb. Methods: 40 cases of PHN in the head,face,neck or upper limb with 4 points≤VAS≤8 points,were randomly divided into radiofrequency group (RF,n=20) and sham group(n=20). Under the guidance of ultrasound, the RF group received PRF on three different targets around the C7 process level. The patients were given oral gabapentin to make VAS ≤ 3 points if the VAS≥4 since 48h of post-PRF therapy. The sham group received the similar procedure without transmitting pulsed current. On 48h after the procedure, gabapentin was also given to make VAS≤3 points. VAS was assayed before procedure,on 24h and 48h after procedure. Daily gabapentin consumption was recorded in the 1st week,the 1st month and the 3rd month after procedure. Pittsburgh Sleep Quality Index (PSQI) score and the MOS item short from health survey (SF-36) score were performed before procedure,the 1st month and the 3rd month after procedure. Results: VAS of the RF group decreased significantly on the 24h and 48h after procedure (P<0.05), and the advantage was statistically significant compared with sham group(P<0.05).However, compared with pre-treatment,there were no significant differences on the 24h and 48h after procedurein sham group. Daily gabapentin consumption in RF group were lower than those in sham group on the 1st week and 1st month after procedure (P<0.05).Yet,there were no significant differences between the two groups on the 3rd month after procedure. PSQI scores and SF-36 scores in the two groups were both significantly improved after treatment, but the improvement in RF group took advantage over that in sham group on the 1stmonth after procedure (P<0.05). On the 3rd month after procedure, there were no statistical differences between the two groups. No serious complications were observed during the whole treatment. Conclusions:Modified PRF on stellate ganglion can effectively relieve PHN in the head,face,neck or upper limb in a short-term.