A Static Bioimpedance and Dynamic Acoustic Myography Preliminary Assessment of Low Frequency Therapeutic Ultrasound Treatment of the Shoulder Muscle Trapezius: An Equine Study
Background:In
horses, therapeutic ultrasound has been shown to be beneficial for suspensory
ligament injuries, and more generally to stimulate tissue repair and reduce
localized pain. However, it has yet to be examined in relation to soft tissue
injuries sustained during competition or in connection with rider/saddle
interactions. Aim: The aim of the present study was to examine the efficacy
of topical low-frequency therapeutic ultrasound on the shoulder muscles of
injured horses. Methods:Muscle mass and cellular health was assessed for M. trapezius using non-invasive
multi-frequency bioimpedance, and dynamic improvements in M. trapezius and M.
latissimus dorsi were examined using acoustic myography (AMG). A total of 8
injured horses (painful to palpation and atrophied) were treated using anEQ Pro
Therapy unit, following a set protocol that comprised treatment every other day
for 10 treatments. Pre-treatment values were then compared with post-treatment
measurements (1 & 6 months later). Results:The
mfBIA results for M. trapezius showed
a significant improvement (P<0.05) of EQ Pro Therapy treatment for the membrane
capacitance (Mc) and phase angle (PA) parameters when comparing the Pre vs Post1 and Post1 vs Post2 measurements. Similar improvements were seen for
the AMG measurements for M. trapezius and M. latissimus dorsi where
statistically significant improvements in the muscle efficiency (E-score) and
temporal summation (T-score) as well as the spatial summation (S-score) and
mean of the ST-scores were noted
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