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Detecting local twitch responses of myofascial trigger points in the lower-back muscles using ultrasonography

Authors
 Dong-wook Rha  ;  Ji Cheol Shin  ;  Yong-Kyun Kim  ;  Jae Hwan Jung  ;  Young Uhk Kim  ;  Sang Chul Lee 
Citation
 ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION, Vol.92(10) : 1576-1580.e1, 2011 
Journal Title
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION
ISSN
 0003-9993 
Issue Date
2011
MeSH
Adult ; Aged ; Aged, 80 and over ; Back* ; Case-Control Studies ; Female ; Humans ; Male ; Middle Aged ; Muscle, Skeletal/diagnostic imaging* ; Muscle, Skeletal/physiopathology* ; Myofascial Pain Syndromes/diagnostic imaging* ; Myofascial Pain Syndromes/physiopathology* ; Sensitivity and Specificity ; Ultrasonography
Keywords
Myofascial pain syndrome ; Rehabilitation ; Trigger points ; myofascial ; Ultrasonography
Abstract
OBJECTIVE: To evaluate the role of ultrasonography for detecting local twitch responses (LTRs) of myofascial trigger points (MTrPs) in deeply located lower-back muscles.

DESIGN: Case-control study. Active MTrP was diagnosed in all patients based on the criteria proposed by Travell and Simons in their upper-trapezius or lower-back muscles. One investigator administered trigger point injections while observing LTRs on ultrasonography. The other investigator observed LTRs visually during the procedure.

SETTING: University rehabilitation hospital.

PARTICIPANTS: Patients (n=41; mean age, 51.8 ± 11.8y) with MTrPs in the upper-trapezius muscles and patients (n=62; mean age, 56.8 ± 11.9y) with MTrPs in the erector spinae or quadratus lumborum were recruited from April 29 to October 31, 2010.

INTERVENTIONS: Ultrasound-guided trigger point injection.

MAIN OUTCOME MEASURES: LTR detection rate according to the depth of MTrPs; subjective pain intensity using a visual analog scale before and immediately after the trigger point injection.

RESULTS: In upper-trapezius muscles, all LTRs were detected by means of both ultrasonographic and visual inspection. In the lower-back muscles, many LTRs were detected only on ultrasonography during the trigger point injection. For deep muscles, ultrasound helped identify LTRs that were not detected by using visual assessment. Pain was alleviated more significantly in the group with LTRs during trigger point injections compared with the group without LTRs.

CONCLUSIONS: These findings suggest that ultrasonography was useful for detecting LTRs of MTrPs, especially for LTRs in the deep muscles. Ultrasound guidance may improve the therapeutic efficacy of trigger point injection for treating MTrPs in the deep muscles
Full Text
http://www.sciencedirect.com/science/article/pii/S0003999311003261
DOI
10.1016/j.apmr.2011.05.005
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Rha, Dong Wook(나동욱) ORCID logo https://orcid.org/0000-0002-7153-4937
Shin, Ji Cheol(신지철) ORCID logo https://orcid.org/0000-0002-1133-1361
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/94516
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