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Study aim
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Evaluating the effect of subacromial space injections of low molecular weight hyaluronic acid or high molecular weight hyaluronic acid in comparison with physiotherapy in shoulder tendinopathy.
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Design
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Single center, randomized, blinded, phase III clinical trial with a parallel group design of 84 participants with shoulder tendinopathy, equally divided in to three groups, low MW hyaluronic acid, high MW hyaluronic acid and Physiotherapy.
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Settings and conduct
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Follow-up assessors, statistical data analyzers, and quality controllers are blinded. The injectors and physiotherapist have been excluded from the study and the interventions performed based on the codes provided in a sealed packages.
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Participants/Inclusion and exclusion criteria
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Participants will be adult patients (16-70 years old) with Shoulder Tendinopathies, with onset of shoulder pain for least 6 weeks . Pediatrics, geriatrics, pregnant, lactating, patient with active rheumatologic disorders, patient with coagulopathies, active infections in shoulder and tissues of around the shoulder, complete rupture of rotator cuff tendons, diabetes mellitus, use of anticoagulant drugs, use of systemic corticosteroid in the last month will be excluded from the study.
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Intervention groups
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Participants randomly divided in three groups of intervention, first group received low MW hyaluronic acid (Hyalgan®), the second group received high MW hyaluronic acid (Synogel®) and the third group received Physiotherapy.
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Main outcome variables
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The primary outcome is Visual Analog Scale (VAS). The secondary outcomes will be: 1) the range of motions (ROM) in flexion, extension, abduction, adduction, internal and external rotation, 2) Disability of the Arm Shoulder and Hand (DASH) Questionnaire, 3) Quality Of Life (WHOQOL)-BREF.