Efficacy of Interferential Laser Therapy in Shoulder Pain

Study Overview
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Brief Summary
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The purpose of this study is to determine the advantages of the interferential laser therapy in shoulder pain reduction compared with the conventional low level laser therapy modality.

Detailed Description
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The spatiotemporal superposition of two independent and opposite beams of laser generates a constructive interference pattern that increases the therapeutic effects in the irradiated tissue. Patients diagnosed of shoulder pain from different musculoskeletal disorders will received conventional or interferential laser therapy. This is a comparative, randomized and double - blind clinical study. Two identical equipments of near infrared laser therapy will be used. Number of sessions: 15. Frequency of the sessions: daily. Irradiation technique: manual, contact and punctual.Pain will be evaluated by visual analog scale (VAS) at rest and during analytical shoulder movements (abduction, adduction, internal rotation, external rotation, flexion, extension) and by means of a pain and disability index (SPADI). Evaluations will take place at pre and post treatment.

Official Title
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Efficacy of Interferential Laser Therapy in Pain Reduction in Shoulder Musculoskeletal Pathologies.

Conditions
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Shoulder Musculoskeletal Disorders

Intervention / Treatment
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* Device: Interferential Laser therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Acute or chronic pain from musculoskeletal origin Age between 18 and 70 years Exclusion Criteria: Brachial plexus palsy Neurological diseases Pacemakers Shoulder pain from cervical pathology Osteosynthesis material Fibromyalgia

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: 1<br>100 patients are being treated with a single laser beam over pain area. | Device: Interferential Laser therapy<br>* Two GaAlAs laser (810 nm, 100mW)were used. In the interferential laser treatment, two probes were simultaneously applied. In the conventional laser group, only one probe was switched on. Laser was applied at five points over the pain area. The laser emission mode was continuous with an energy dose of 6 joules per point and session, a power density of 1.09 w/cm2 and an irradiation time per point of 60 s. The average output power was 100 mW and the total energy dose delivered in a patient session was 30 J. Every treatment was along 15 sessions. Hence, the accumulated energy delivered on the whole was 450 Joules for the conventional group of patients (using one beam) and 900 Joules for the interferential one (using two beams).<br>* Other names: SN: 105XLS147 (first laser) and 105XLS148 (second laser).;|
| Experimental: 2<br>100 patients are being treated with interferential laser from two independent sources | Device: Interferential Laser therapy<br>* Two GaAlAs laser (810 nm, 100mW)were used. In the interferential laser treatment, two probes were simultaneously applied. In the conventional laser group, only one probe was switched on. Laser was applied at five points over the pain area. The laser emission mode was continuous with an energy dose of 6 joules per point and session, a power density of 1.09 w/cm2 and an irradiation time per point of 60 s. The average output power was 100 mW and the total energy dose delivered in a patient session was 30 J. Every treatment was along 15 sessions. Hence, the accumulated energy delivered on the whole was 450 Joules for the conventional group of patients (using one beam) and 900 Joules for the interferential one (using two beams).<br>* Other names: SN: 105XLS147 (first laser) and 105XLS148 (second laser).;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pain will be evaluated by visual analog scale (VAS) at rest and during analytical shoulder movements. |  | Five minutes | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Shoulder Pain Disability Index (SPADI) |  | ten minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Interferential laser therapy