Immediate effects of various physical therapeutic modalities on cervical myofascial pain and trigger-point sensitivity,☆☆,,★★,,♢♢,

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Abstract

Hou C-R, Tsai L-C, Cheng K-F, Chung K-C, Hong C-Z. Immediate effects of various physical therapeutic modalities on cervical myofascial pain and trigger-point sensitivity. Arch Phys Med Rehabil 2002;83:1406-14. Objective: To investigate the immediate effect of physical therapeutic modalities on myofascial pain in the upper trapezius muscle. Design: Randomized controlled trial. Setting: Institutional practice. Patients: One hundred nineteen subjects with palpably active myofascial trigger points (MTrPs). Intervention: Stage 1 evaluated the immediate effect of ischemic compression, including 2 treatment pressures (P1, pain threshold; P2, averaged pain threshold and tolerance) and 3 durations (T1, 30s; T2, 60s; T3, 90s). Stage 2 evaluated 6 therapeutics combinations, including groups B1 (hot pack plus active range of motion [ROM]), B2 (B1 plus ischemic compression), B3 (B2 plus transcutaneous electric nerve stimulation [TENS]), B4 (B1 plus stretch with spray), B5 (B4 plus TENS), and B6 (B1 plus interferential current and myofascial release). Main Outcome Measures: The indexes of changes in pain threshold (IThC), pain tolerance (IToC), visual analog scale (IVC), and ROM (IRC) were evaluated for treatment effect. Results: In stage 1, the IThC, IToC, IVC, and IRC were significantly improved in the groups P1T3, P2T2, and P2T3 compared with the P1T1 and P1T2 treatments (P<.05). In stage 2, groups B3, B5, and B6 showed significant improvement in IThC, ItoC, and IVC compared with the B1 group; groups B4, B5, and B6 showed significant improvement in IRC compared with group B1 (P<.05). Conclusions: Ischemic compression therapy provides alternative treatments using either low pressure (pain threshold) and a long duration (90s) or high pressure (the average of pain threshold and pain tolerance) and short duration (30s) for immediate pain relief and MTrP sensitivity suppression. Results suggest that therapeutic combinations such as hot pack plus active ROM and stretch with spray, hot pack plus active ROM and stretch with spray as well as TENS, and hot pack plus active ROM and interferential current as well as myofascial release technique, are most effective for easing MTrP pain and increasing cervical ROM. © 2002 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

Section snippets

Participants and experimental design

Patients with cervical myofascial pain were recruited from our university's department of rehabilitation medicine. A total of 119 subjects (107 women, 12 men; age range, 30–60y) with clinically active, palpable MTrPs in a single side or both sides of the upper trapezius muscle were recruited between March and October 2000 for this study. The criteria for subject selection included (1) no neck or shoulder surgery within the past year; (2) no clinical evidence of radiculopathy or myelopathy; (3)

Stage 1: Immediate effect of ischemic compression with various pressures and durations

The data for subjects in the 6 ischemic compression groups (stage 1) are listed in table 1.

. Subjects' data in stages 1 and 2

GroupnSample Sizes of MTrPsWomenMenMean Age ± SD (y)
Stage 1
 P1T18148049.50±11.14
 P1T28148045.50±14.59
 P1T38148038.11±8.24
 P2T18148041.00±14.63
 P2T28148046.25±14.54
 P2T38148045.50±13.20
Stage 2
 B1213517447.86±13.68
 B2132212150.62±15.32
 B39178146.89±14.91
 B410177353.20±16.77
 B59166351.00±16.19
 B69169039.67±7.55

Abbreviations: P1, pain threshold; P2, average of pain threshold and pain

Discussion

Copper et al37 and Fricton et al38 have proposed that the incidence of MTrPs appears to be higher in women than in men, and that, among all age groups, patients 30 to 40 years old appear to have the highest prevalence of trigger points. Of our 119 subjects (age range, 30–60y), 107 were women, which indicates that the incidence of MTrPs is higher in women than in men. Patients with MTrPs in the upper trapezius muscle usually complain of neck pain, headache, muscle stiffness, restricted ROM of

Conclusions

Ischemic compression therapy with quantified pressure and duration provides alterative treatments by using either the pressure of pain threshold with a long duration of 90 seconds or the pressure of the average of pain threshold and pain tolerance with a duration of 30 seconds. It provides immediate pain relief and reduces the MTrP sensitivity of the cervical myofascial pain.

Immediate relief from cervical myofascial pain can be obtained in 6 therapeutic modalities. Hot pack plus active ROM,

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    Reprint requests to Chuen-Ru Hou, PhD, Institute of Biomedical Engineering, National Cheng Kung University, No. 1, Ta-Hsueh Rd, Tainan 701, Taiwan, e-mail: [email protected].

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