Department of Neurology, Ludwig-Maximilians-University Hospital, Munich, Germany.
Department of Radiology, Ludwig-Maximilians-University Hospital, Munich, Germany.
Eur J Pain. 2019 Feb;23(2):250-259. doi: 10.1002/ejp.1299. Epub 2018 Sep 9.
BACKGROUND: Magnetic field therapy is a popular approach to pain therapy, but scientific evidence on treatment effects or even effects on sensory and pain perception in healthy controls is scarce. METHODS: In the present randomized, placebo-controlled study, we investigated the influence of static magnetic field exposure on sensory (touch) and pain (pinprick, pressure and heat) perception. Eighteen healthy volunteers (age: 23 ± 2 years, nine women) underwent three 10-min static magnetic field exposures using field strengths of 0 T (placebo), 1.5 T and 3 T within clinical MR scanners in randomized order on three separate days. Participants were blinded to magnetic field strength. Experimental sensory and pain testing was performed immediately before and after each magnetic field exposure. RESULTS: There was no significant effect of field strength on the assessed experimental sensory and pain testing parameters (mechanical detection threshold, pinprick threshold, pressure pain threshold, heat pain threshold and suprathreshold heat pain rating). CONCLUSION: We found no evidence that a 10-min 1.5 T or 3 T static magnetic field exposure affects experimental sensory or pain perception in young healthy volunteers. SIGNIFICANCE: We used clinical MR scanners to investigate the effect of magnetic fields on pain perception. Using a rigorous, straightforward, placebo-controlled design, no effect of static magnetic fields on human experimental pain perception was detected. This provides a base for a more systematic investigation of magnetic field effects on pain.
背景:磁场疗法是一种流行的疼痛治疗方法,但关于治疗效果的科学证据,甚至对健康对照者的感觉和疼痛感知的影响的证据都很少。
方法:在本项随机、安慰剂对照研究中,我们调查了静磁场暴露对感觉(触觉)和疼痛(刺痛、压力和热)感知的影响。18 名健康志愿者(年龄:23±2 岁,9 名女性)在 3 天内分别以随机顺序接受了 3 次 10 分钟的静磁场暴露,磁场强度分别为 0T(安慰剂)、1.5T 和 3T,使用临床磁共振扫描仪进行。参与者对磁场强度不知情。在每次磁场暴露前后立即进行实验性感觉和疼痛测试。
结果:磁场强度对评估的实验性感觉和疼痛测试参数(机械检测阈值、刺痛阈值、压力疼痛阈值、热痛阈值和超阈值热痛评分)没有显著影响。
结论:我们没有发现 10 分钟 1.5T 或 3T 静磁场暴露会影响年轻健康志愿者的实验性感觉或疼痛感知。
意义:我们使用临床磁共振扫描仪研究了磁场对疼痛感知的影响。使用严格、直接、安慰剂对照的设计,未检测到静磁场对人体实验性疼痛感知的影响。这为更系统地研究磁场对疼痛的影响提供了基础。
J Appl Physiol (1985). 2007-4
Clin J Pain. 2010-1