Comparison between bipolar and tetrapolar of the interferential current in nociceptive threshold, accommodation and pleasantness in healthy individuals

A. Fiori, Cindy Larissa Correia Cescon, Juliana De Freitas Galesky, T. C. Santos, R. M. Brancalhão, G. Bertolini
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引用次数: 12

Abstract

Abstract The study compared the effects between bipolar (BI) and tetrapolar (TT) forms of the interferential current (IC), on intensity and pain threshold to cold and pressure, accommodation and pleasantness of the current in healthy subjects. For this, a random, double-blind crossover study with 24 healthy subjects, of both genders, who were equally distributed in two groups, was conducted. The first evaluated item was the pain threshold to cold. The volunteers immersed the dominant foot in iced water (5°C) for 30 s, and recorded the pain threshold to cold. At the end, they graded the pain intensity by a visual analog scale (VAS). Soon after the pain threshold to pressure was evaluated with the use of a pressure algometer between the first and second metatarsal and L3 spinous process. Then the volunteers were submitted to the application of the IC, with the following parameters: 4000 Hz base frequency, amplitude modulated frequency (AMF) 50 Hz, for 20 min. Volunteers were re-evaluated straight away, 20 and 60 min after the IC usage. The last part of the analysis consisted of, after application of BI and TT, knowing which was the most enjoyable. The results revealed that in the evaluation of the pain threshold to pressure on the metatarsal, there was significant difference when comparing all evaluations of BI with only the last of TT; there was also difference on the accommodation threshold. We concluded that the IC usage, on nerve roots L4 and S3, on the proposed parameters, produced a higher accommodation threshold in the TT form, and it was more effective than BI on the metatarsal. However, the pain threshold to pressure (on the spine), to cold and its intensity did not suffer any change.
双极与四极干扰电流在健康个体伤害阈值、适应性和愉悦性方面的比较
摘要本研究比较了双极(BI)和四极(TT)形式的干扰电流(IC)对健康受试者的强度、冷、压痛阈值、电流调节和愉悦度的影响。为此,研究人员对24名男女健康受试者进行了随机双盲交叉研究,这些受试者平均分为两组。第一个评估项目是对寒冷的疼痛阈值。志愿者将主脚浸入冰水(5°C) 30秒,并记录对寒冷的疼痛阈值。最后,他们用视觉模拟量表(VAS)对疼痛强度进行分级。术后不久,在第一、第二跖骨和L3棘突之间使用压力测量仪评估疼痛阈值。然后将志愿者提交到IC的应用中,其参数为:4000 Hz基频,50 Hz调幅频率(AMF),持续20分钟。志愿者在IC使用20和60分钟后立即重新评估。最后一部分的分析是,在BI和TT的应用之后,知道哪个是最令人愉快的。结果显示,在跖骨压力痛阈的评估中,BI组的所有评估与TT组的最后一个评估相比有显著差异;在适应阈值上也存在差异。我们得出结论,在L4和S3神经根上使用IC,在建议的参数上,在TT形式中产生更高的调节阈值,并且比在跖骨上使用BI更有效。然而,对压力(脊柱)、寒冷及其强度的疼痛阈值没有任何变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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