Long-term effect of high-intensity laser therapy for persistent shoulder pain: A case report.

BACKGROUND AND OBJECTIVE: This case report describes the long-term effect of the high-intensity laser therapy (HILT) in a patient with chronic shoulder pain refractory in comparison to other treatments. CASE DESCRIPTION: Ten sessions of HILT were applied in a thirty-one-year-old woman diagnosed with subacromial syndrome. Assessment was carried out through different tests: Shoulder Pain and Disability Index (SPADI), Numeric Pain Rating Scale (NPRS) and pressure pain threshold (PPT). All measurements were taken at four different points: at the end of the 10 sessions, after one month, three months after the intervention and nine months after the initial intervention. RESULTS: There was a clinically significant improvement in NPRS (decrease of 5 points), PPT (increase of 1.5 kg/cm2) and SPADI (decrease of 24 points) one month after the intervention. After three months, the increase of NPRS and SPADI required a 5-session intervention to support the clinical improvement. Six months after these booster sessions an increase in PPT and a decrease in NPRS and SPADI were observed. CONCLUSION: Results indicate the suitability of developing new research lines which will optimize the use of HILT.

Efficacy of high-intensity laser therapy in subacromial impingement syndrome: a three-month follow-up controlled clinical trial.

OBJECTIVES: To evaluate the effectiveness of high-intensity laser therapy on shoulder pain and function in subacromial impingement syndrome. DESIGN: Clinical controlled trial with alternate allocation. SETTING: Hospital Department of Rehabilitation. SUBJECTS: A total of 46 participants with subacromial impingement syndrome. INTERVENTION: Participants were sequence allocated to an intervention group (high-intensity laser therapy + exercise therapy) and control group (sham-laser + exercise therapy) and received 15 sessions (five days a week during three weeks). MAIN MEASURES: Patiens were evaluated at baseline, after 15 sessions, and at one month and at three months after completing the intervention. The main outcome variables were pain and functionality as measured by visual analogue scale; pressure pain threshold; Shoulder Pain and Disability Index; Constant-Murley Score; and QuickDASH. Secondary outcomes were number of sessions at discharge and drug use. RESULTS: A total of 21 patients in high-intensity laser therapy group (56.7 ± 8.9 years) and 22 patients in sham-laser group (61.3 ± 8.9 years) concluded the study. Visual analogue scale (cm) at baseline, one-month, and three-months were 6.2 ± 0.5, 3 ± 2.6, and 2.6 ± 2.4 for the control group and 5.4 ± 1.5, 3.6 ± 1.3, and 1.8 ± 1.7 for experimental group, respectively. Shoulder Pain and Disability Index (points) at baseline, one-month, and three-monts were 51.8 ± 16.1, 16.3 ± 16.1, and 13.6 ± 17.1 in the control group and 41.8 ± 20.6, 20.5 ± 19.7, 11 ± 14.5 in experimental group, respectively. No differences were found between groups ( P > 0.05). CONCLUSION: The effect of high-intensity laser therapy plus exercise is not higher than exercise alone to reduce pain and improve functionality in patients with subacromial syndrome.