ISSN: 2544-4395
Physiotherapy Quarterly
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SCImago Journal & Country Rank
3/2020
vol. 28
 
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abstract:
Original paper

Effectiveness of percutaneous microelectrolysis and ultrasound in the decrease of pain in myofascial trigger points: evaluation through algometry and visual analog scale

Hernán Andrés de la Barra Ortiz
1
,
Jaime Opazo Cancino
2
,
Fernanda Sánchez Peña
1
,
Fernanda Soto León
1
,
Edward Miño Donoso
1
,
Valeria Trecanao Gaete
1

1.
Universidad Andres Bello, Santiago, Chile
2.
Universidad Diego Portales, Santiago, Chile
Physiotherapy Quarterly (ISSN 2544-4395) 2020, 28(3), 1–8
Online publish date: 2020/08/20
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Introduction
Percutaneous electrotherapy is a therapeutic alternative in musculoskeletal conditions. Percutaneous micro- electrolysis (MEP) stands out as treatment for tendinopathies and musculoskeletal pain, such as myofascial trigger points (MTrPs), although more studies are needed to support it. The study aimed to investigate MEP effectiveness in reducing pain pressure threshold (PPT) and pain intensity (PI) in MTrPs.

Material and methods
A randomized controlled clinical trial was performed at Physiotherapy Laboratory of Andrés Bello University and in- volved 48 volunteers with MTrPs in upper trapezius muscle, randomly assigned to the experimental or control group. Both groups received baseline ultrasound treatment. In the experimental group, MEP intervention was applied with 3 re-evaluation sessions (on days 1, 3, and 7). Direct current was delivered with an acupuncture needle directly to MTrPs, and PPT and PI were re-evaluated before and after the application. The main outcomes were PPT and PI differences (PPTdiff and PIdiff) between evaluation sessions.

Results
TMEP implied positive changes, increasing PPT (PPTdiff1-1, p = 0.0000; PPTdiff2-1, p = 0.0000; PPTdiff3-1, p = 0.0000) and decreasing PI (PIdiff1-1, p = 0.0001; PIdiff2-1, p = 0.0001; PIdiff3-1, p = 0.0008) in the experimental group. Significant differ- ences were observed in PPT in the second re-evaluation session compared with the control group (PPTdiff2-1, p = 0.0032).

Conclusions
MEP is a good analgesic treatment for MTrPs compared with therapeutic ultrasound, although neither of these therapies seems to be better than the other in a long term. They improve PPT and PI, so MEP can be considered effective alter- native treatment for MTrPs pain.

keywords:

electrotherapy, electrolysis, pain threshold, myofascial pain syndromes, ultrasound, visual analogue scale

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