[Effect assessment of acupotomy on myofascial pain syndrome of trapezius muscle based on portable shear wave elastography].

Researchers investigated whether a portable ultrasound technology could objectively measure muscle stiffness in people with trapezius muscle pain (the large muscle across your upper back and shoulders) and track improvement after acupotomy treatment. The study included 49 participants: some with one-sided trapezius pain, some with pain on both sides, and healthy volunteers for comparison. Using shear wave elastography, researchers measured muscle stiffness and had participants rate their pain levels. They found that people with trapezius myofascial pain syndrome had significantly stiffer muscles compared to healthy controls. The optimal threshold for diagnosing this condition was a stiffness measurement of 9.08 kPa, with good accuracy (84% specificity and 75% sensitivity). In the treatment group, 14 muscle samples received a single session of ultrasound-guided acupotomy, where a needle-scalpel was used to release tight fascial layers surrounding the trapezius muscle. After just one treatment, both muscle stiffness and pain scores decreased significantly. This study suggests that acupotomy can immediately improve muscle elasticity and reduce pain in people with trapezius myofascial pain syndrome. The portable ultrasound technology shows promise as an objective way to diagnose this condition and measure treatment effectiveness, moving beyond relying solely on patient-reported symptoms. If you're considering acupotomy for muscle pain, seek a qualified practitioner trained in both acupuncture techniques and proper needle-knife methods.

This study evaluated portable shear wave elastography (SWE) for quantitative assessment of trapezius myofascial pain syndrome (MPS) and acupotomy efficacy. Researchers enrolled 49 subjects providing 98 trapezius samples: 61 symptomatic and 37 controls. Baseline measurements showed significantly elevated shear modulus (G-value) and VAS scores in the MPS group versus controls (P<0.05). ROC curve analysis determined an optimal diagnostic threshold of 9.08 kPa (83.78% specificity, 75.41% sensitivity). Fourteen symptomatic samples received single-session ultrasound-guided acupotomy targeting deep and superficial fascial layers. Post-treatment analysis demonstrated significant reductions in both G-value and VAS scores (P<0.05), indicating immediate therapeutic effect. Clinical implications include validated objective diagnostic criteria for trapezius MPS and quantifiable evidence supporting acupotomy's mechanism of action through fascial release and improved tissue elasticity. Portable SWE provides reproducible, objective outcome measures for clinical practice and research.