The analgesic effects of interferential therapy on two experimental pain models: cold and mechanically induced pain

被引:20
|
作者
McManus, Fiona J.
Ward, Alex R. [1 ]
Robertson, Val J.
机构
[1] La Trobe Univ, Fac Hlth Sci, Dept Human Physiol & Anat, Latrobe, Vic 3086, Australia
[2] La Trobe Univ, Sch Physiotherapy, Latrobe, Vic, Australia
关键词
interferential therapy; cold pain; mechanical pain; pain measures;
D O I
10.1016/j.physio.2005.09.007
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
Objective To evaluate the analgesic effects of interferential therapy (IFT) when using cold and mechanical pain models. The aim was to determine whether the effects of IFT are dependent oil the origin of experimental pain. Design Randomised Controlled trail. Setting University research laboratory. Participants Twenty pain-free participants. Intervention Each participant was exposed to the two methods of pain induction oil different days. Main outcome measures Cold pain threshold (time to first sensation of pain), intensity and Unpleasantness measured oil a Visual analogue scale (VAS); mechanical pain threshold (tolerance to pressure) and Unpleasantness (VAS). Results IFT produced similar effects on the threshold (first sensation of pain) for both cold and mechanical pain. The thresholds were significantly increased and the percentage changes in both were similar. as were their standard deviations. This indicates that the analgesia provided by IFT is similar whether the origin of pain is cold or mechanical. and suggests that IFT can affect pain from a range of origins. The effect of IFT on other measures was not as pronounced. With mechanical pain, neither pain tolerance (maximum tolerable pain) nor unpleasantness was significantly altered. With cold pain, both intensity and unpleasantness showed a small but statistically significant change. Conclusions The cold and mechanical pain models are equally effective experimental tools to investigate electroanalgesia. These findings also suggest that future research should not induce pain beyond threshold when using the cold and mechanical pain models. as little additional information is gathered whilst subject discomfort and the risk of tissue damage is increased. (c) 2005 Chartered Society of Physiotherapy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:95 / 102
页数:8
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