The result of local twitch response during treatment of myofascial pain syndrome in the upper trapezius muscle by trigger point injection technique: A retrospective study
Keywords:
Myofascial pain syndrome, Local twitch response, trigger point injection, upper trapeziusAbstract
Background: Specific treatment by trigger point injection is a popular method to treat myofascial pain syndrome. When trigger point injection is applied to the trigger point, it can induce up to 44% of the local twitch response (LTR). It was observed that patients who had LTR during trigger point injection were more likely to have better results than those without local twitch response.
Objectives: To compare the results of treatment of patients with and without LTR during trigger point injection in patients with Myofascial pain syndrome in the upper trapezius muscle.
Method: A retrospective study of medical records from patients diagnosed with myofascial pain syndrome in the upper trapezius muscle and was treated with trigger point injection in orthopedic department at Ranong Hospital from July 2019 to December 2019. Total 32 medical records were included in this study. To compares between the group with LTR and without LTR during the treatment.
Results: The study showed that at 1 month after trigger point injection, patients with LTR during treatment had statistically significant decrease in pain(p=0.045), increase in pressure pain thresholds(p=0.047) and increase of contralateral neck flexion (p=0.03) and contralateral neck rotation(p=0.041) compared with patients without LTR.
Conclusion: Presentation of LTR during trigger point injection is a positive factor for a successful treatment in patient with myofascial syndrome.
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