Effects of Carrier Frequency of Interferential Current on Pressure Pain Threshold and Sensory Comfort in Humans

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• 作者：Roberta Ceila Venancio ; PT ; MSc^a ; Stella Pelegrini ; PT ; MSc^a ; Daiane Queiroz Gomes ; PT^a ; Eduardo Yoshio Nakano ; PhD^b ; Richard Eloin Liebano ; PT ; PhD^a ; ^{liebano@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Electric stimulation therapy ; Pain threshold ; Physical therapy modalities ; Rehabilitation
• 刊名：Archives of Physical Medicine and Rehabilitation
• 出版年：2013
• 出版时间：January 2013
• 年：2013
• 卷：94
• 期：1
• 页码：95-102
• 全文大小：486 K

文摘

To assess the effect of carrier frequency of interferential current (IFC) on pressure pain threshold (PPT) and sensory comfort in healthy subjects.

Design

A double-blind randomized trial.

Setting

University research laboratory.

Participants

Healthy subjects (N=150).

Interventions

Application of the IFC for 20 minutes and measures of PPT collected in the regions of the nondominant hand and forearm.

Main Outcomes Measures

We measured PPT and comfort at frequencies of 1kHz, 2kHz, 4kHz, 8kHz, and 10kHz.

Results

There was a significant increase in PPT in the 1-kHz group when compared with the 8-kHz and 10-kHz groups. There was a greater discomfort in the 1-kHz and 2-kHz groups.

Conclusions

IFC with a carrier frequency of 1kHz promotes a higher hypoalgesic response during and after stimulation than IFC with carrier frequencies of 8kHz and 10kHz. Carrier frequencies of 1kHz and 2kHz are perceived as more uncomfortable than carrier frequencies of 4kHz, 8kHz, and 10kHz.