Efeitos da terapia por ondas de choque na dor miofascial: ensaio clínico, randomizado e cego

Abstract

Objective: To investigate the effects of extracorporal shock wave therapy (ESWT) on on triggers point myofascial, pain and performance neuromuscular of upper trapezius muscle fibers. Materials and methods: A randomized, blinded clinical trial of 60 women (22.8 ± 2.95 years, mean weight of 55.68 ± 7.35 kg, height of 1.61 ± 0.59 cm and mass index body weight of 21.37 ± 2.39 kg / cm2) with presence of trigger points in the upper fibers of the trapezius muscle. They were submitted to an initial evaluation (AV1), composed of the subjective report of pain (through the visual analogue scale), evaluation of pain threshold (through algometry), number of active and latent trigger points and activity electromyography of the upper trapezius muscle at rest and during contraction.Instead, volunteers were allocated randomly into three groups: Control (n = 20), without intervention; placebo (n = 20), simulation of the application of ESWT and ESWT (n = 20). The ESWT was performed with the Master Plus 200® Storz Medical equipment, radial emission of 2000 pulses, frequency of 15 Hz and pressure of 2 Bar, tip of 6 mm2 . All volunteers were reassessed immediately and 48 hours after the intervention protocol (evaluation 48 hours).A mixed ANOVA of repeated measures and used for intragroup and intergroup comparisons, by Tukey post hoc. Significance was set at 5%. Results: There was a reduction of pain due to VAS in the placebo group and ESWT, the after 48 h was lower in all groups when compared to control. In the variable number of total trigger points, we observed a difference between the ESWT and placebo groups, also in the 48 h evaluation. No significant difference was observed in pain threshold, electromyographic amplitude and peak torque analyzes. Conclusion: A ESWT in the treatment of myofascial pain in women has the same result as the placebo treatment.