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The effect of ultrasound-guided percutaneous ozone injection around cervical dorsal root ganglion in zoster-associated pain: a retrospective study

Authors Lin SY, Zhang SZ, An JX, Qian XY, Gao XY, Wang Y, Zhao WX, Eastwood D, Cope DK, Williams JP

Received 21 January 2018

Accepted for publication 2 June 2018

Published 4 October 2018 Volume 2018:11 Pages 2179—2188


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Katherine Hanlon

Si-Yu Lin,1,2 Shi-Zhong Zhang,1 Jian-Xiong An,1,2 Xiao-Yan Qian,2 Xin-You Gao,2 Yong Wang,2 Wen-Xing Zhao,2 Derek Eastwood,3 Doris K Cope,4 John P Williams4

1China Three Gorges, University School of Medicine, Yichang, China; 2Department of Anesthesiology, Pain Medicine and Critical Care Medicine, Aviation General Hospital of China Medical University and Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China; 3Department of Pain Services, Wirral University Teaching Hospital, Wirral, Merseyside, UK; 4Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA

Objective: This study was to evaluate the effectiveness of ultrasound-guided percutaneous ozone injections around the cervical dorsal root ganglions of zoster-associated pain (ZAP) patients.
Study design: Retrospective comparative study.
Settings: The study was conducted at a pain center of a university hospital.
Patients and methods: From June 2016 to July 2017, a total number of 30 patients with ZAP were treated with ultrasound-guided percutaneous ozone injection around the cervical dorsal root ganglion (DRG) at the injured nerve level (C2-C8). A volume of 3 mL ozone-oxygen mixture at a concentration of 30 µg/mL was injected into the area around the DRG. Patients were divided into two groups according to their disease duration: group A (at or <3 months) and group B (>3 months). The pain severity was assessed according to a visual analog scale, and imaging changes were evaluated by ultrasound. Patient improvements in pain and neurologic function were evaluated during a follow-up period from 1 to 3 months.
Results: The data showed that ozone injections reduced pain in patients with ZAP. However, the success rate of group A was higher than group B. After the injection, the von Frey data demonstrated decreases in both groups, but, there were no significant differences between the groups. Moreover, univariate logistic regression analysis and multivariate regression analysis showed a history of diabetes mellitus had a significant effect on the treatment results.
Conclusions: Percutaneous ozone injection around the DRG might be a useful method for treatment-resistant cases of ZAP at the cervical level. Institutional Review Board (IRB) approval number: HK2017-1130.

Keywords: herpes zoster, neuropathic pain, post-herpetic neuralgia, ozone injection

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