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Pain Research and Management
Volume 2017 (2017), Article ID 8098473, 8 pages
Research Article

The Effect of Carpal Tunnel Release on Neuropathic Pain in Carpal Tunnel Syndrome

1Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga 849-8501, Japan
2Tsuruta Orthopaedic Clinic, No. 1241-6, Katsu, Ushizu-cho, Ogi City, Saga 849-0306, Japan
3Department of Orthopaedic Surgery, Saga Insurance Hospital, Saga 849-8522, Japan
4Sakaemachi Orthopaedic Clinic, 2-8 Sakaemachi, Saga City, Saga 840-0803, Japan

Correspondence should be addressed to Motoki Sonohata

Received 24 April 2017; Revised 22 June 2017; Accepted 24 July 2017; Published 10 September 2017

Academic Editor: Panagiotis Zis

Copyright © 2017 Motoki Sonohata et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. The aim of this study was to determine the risk factors of neuropathic pain (NP) in the patient with carpal tunnel syndrome (CTS) before and after the carpal tunnel release. Materials and Methods. One hundred and two CTS patients were enrolled in the study. The pain score was measured by the visual analogue score. NP was determined by the painDETECT (PD) questionnaire. All subjects were divided into 3 groups at 12 weeks after surgery: an Improved, Unchanged, and Worsened group. The risk factors of worsening NP after surgery were evaluated. Results. We found that 36% and 18% of patients with CTS had neuropathic pain before and 12 weeks after surgery, respectively, and pain was significantly stronger than in those without NP. The PD score of eight hands worsened after surgery. In the “Improved group,” the average age at the surgery was younger and the pain score was lower than in the “Unchanged group.” Conclusions. The surgery was very effective on NP of CTS; however, the PD in 7% of hands worsened after surgery. Risk factors before surgery that predicted worse NP after surgery were found to be a younger age, weaker pain, and the absence of night pain.