Abstract 【Objective】To explore the efficacy and safety of ultrasound-guided small needle knife in the treatment of myofascial pain syndrome (MPS). 【Methods】From December 2019 to January 2021, 73 patients diagnosed as MPS in the shoulder pain clinic of Hunan Provincial People's Hospital (the First Affiliated Hospital of Hunan Normal University) with neck and shoulder pain were prospectively collected. The subjects were randomly divided into experimental group (n=37) and control group (n=36). The experimental group was treated with small needle knife guided by visual ultrasound, and the control group was treated with traditional needle knife; The gray-scale ultrasonographic manifestations of myofascial trigger points (MTrPs), Young's modulus values of MTrPs and adjacent areas before and after treatment, visual analogue scale (VAS) before, during and after treatment of the two groups were recorded respectively, and whether there were needle syncope, pneumothorax, bleeding, pain, etc. in the whole treatment process of the two groups were recorded Nerve damage and other adverse events occurred. 【Results】The characteristics of MTrPs in gray-scale sonogram were mainly low echo area, and the young's modulus of MTrPs was higher than that of adjacent areas (P<0.05). The VAS of the two groups during and after treatment were lower than before treatment; The young's modulus after treatment was lower than that before treatment (P<0.05). There was no significant difference in VAS and Young's modulus before treatment between the two groups (P>0.05), but the VAS and Young's modulus after treatment in the experimental group were significantly lower than those in the control group (P<0.05). Pearson correlation analysis showed that MTrPs and Young's modulus were positively correlated with VAS (r=0.8, P<0.01). There were 3 cases of adverse events in the control group, which were manifested as the formation of local hematoma in the treatment area. There was no obvious bleeding in the experimental group, and there were no adverse events such as needle syncope, pneumothorax and nerve damage in the two groups. 【Conclusion】Compared with the traditional small needle knife, ultrasound-guided small needle knife in the treatment of neck and shoulder MPs has better curative effect and higher safety, which is worthy of clinical application and promotion.
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2021, Vol. 38 
