Comparison of the Effects of Physiologic Saline Interfascial and Lidocaine Trigger Point Injections in Treatment of Myofascial Pain Syndrome: A Double-Blind Randomized Controlled Trial.
Arch Rehabil Res Clin Transl 2021;
3:100119. [PMID:
34179755 PMCID:
PMC8211995 DOI:
10.1016/j.arrct.2021.100119]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Objective
To compare the effects of physiological saline interfascial and lidocaine trigger point injections in the treatment of myofascial pain syndrome (MPS).
Design
Double-blind randomized controlled study.
Setting
Department of Rehabilitation Medicine.
Participants
Eighty patients (N=80; 15 men, 65 women; mean age, 40.4±10.9y) with MPS in the upper trapezius muscle.
Interventions
Patients were randomly assigned to 1 of 2 groups: group 1 (n=40) received ultrasound-guided interfascial injection with physiological saline, and group 2 (n=40) underwent ultrasound-guided trigger point injection with lidocaine.
Main Outcome Measures
The primary outcome was pain scores measured by the visual analog scale (VAS). Secondary outcomes included cervical range of motion (ROM) and adverse effects of the procedure. The outcomes were assessed before treatment and 10 minutes, 2 weeks, and 4 weeks after treatment.
Results
Lidocaine trigger point injection showed higher VAS score improvement at 10 minutes after the procedure (P=.037). However, there was no statistically significant difference at other follow-up points. Pain scores significantly decreased at 10 minutes, 2 weeks, and 4 weeks from baseline in both groups. Cervical ROM increased significantly over time in some directions without significant differences between the groups. There were no serious adverse effects in this study.
Conclusion
Physiologic saline interfascial and lidocaine trigger point injections effectively decreased MPS pain in the upper trapezius muscle at 2 and 4 weeks after treatment. However, lidocaine trigger point injection demonstrated better pain improvement at 10 minutes after treatment.
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