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A Clinical Trial of Intrathecal Nicardipine Hydrochloride Administration for Central Sensitization in Chronic Low Back Pain Takanori Murakami 1 , Toshihiko Yamashita 2 , Sumio Ishiai 1 1Division of Rehabilitation, Sapporo Medical University 2Department of Orthopaedic Surgery, Sapporo Medical University Keyword: central sensitization , 中枢感作 , nicardipine hydrocloride , 塩酸ニカルジピン , chronic low back pain , 慢性腰痛 pp.473-480
Published Date 2006/4/1
DOI https://doi.org/10.11477/mf.1408100302
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 It is postulated that central sensitization of the spinal dorsal horn contributes to chronic low back pain. The purpose of this study is to investigate the clinical value of intrathecal administration of nicardipine hydrochloride, an L-type calcium antagonist, for chronic low back pain. Twenty low back pain cases underwent intrathecal administration of nicardipine hydrochloride. The visual analog scale (VAS) revealed improvement of pain. VAS scores were 9.3 and 4.4 at preadministration and final observation, respectively. The NO3- concentration in cerebro-spinal fluid (CSF) was diminished at 4 weeks after intrathecal administration of nicardipine hydrochloride (pre-administration:26.4uM/L and 4 weeks:15.4uM/L). A correlation was recognized between VAS improvement and a decline in the CSF NO3- concentration. Nicardipine hydrochloride may inactivate N-methyl-D-asparate (NMDA) receptors, followed by NO production in spinal dorsal horn. Central sensitization in chronic low back pain should be considered in designing therapeutic strategies.


Copyright © 2006, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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