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Controlled Clinical Trial
. 2014 Aug;95(8):1441-6.
doi: 10.1016/j.apmr.2014.04.002. Epub 2014 Apr 21.

Effect of Interferential Current Stimulation in Management of Hemiplegic Shoulder Pain

Controlled Clinical Trial

Effect of Interferential Current Stimulation in Management of Hemiplegic Shoulder Pain

Duangporn Suriya-amarit et al. Arch Phys Med Rehabil. .


Objective: To study the immediate effects of interferential current stimulation (IFC) on shoulder pain and pain-free passive range of motion (PROM) of the shoulder in people with hemiplegic shoulder pain (HSP).

Design: Double-blind, placebo-controlled clinical trial.

Setting: Institutional physical therapy clinic, neurologic rehabilitation center.

Participants: A population-based sample of people with HSP (N=30) was recruited.

Intervention: Participants were divided into 2 groups--an IFC group and a placebo group--by using a match-paired method (age, sex, and Brunnstrom motor recovery stage). In the IFC group, participants received IFC for 20 minutes with an amplitude-modulated frequency at 100 Hz in vector mode. The current intensity was increased until the participants felt a strong tingling sensation.

Main outcome measures: Pain intensity and pain-free PROM of the shoulder until the onset of pain were measured at baseline and immediately after treatment.

Results: Participants reported a greater reduction in pain during the most painful movement after treatment with IFC than with placebo (P<.05). The IFC group showed a greater improvement in posttreatment pain-free PROM than the placebo group in shoulder flexion (P<.01), abduction (P<.01), internal rotation (P<.01), and external rotation (P<.01).

Conclusions: This study provides evidence that IFC is effective for the relief of pain during movement and also increases the pain-free PROM of the shoulder in people with HSP.

Keywords: Electrical stimulation; Interferential therapy; Rehabilitation; Shoulder pain; Stroke.

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