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A PROSPECTIVE, DOUBLE-BLIND, RANDOMISED CLINICAL TRIAL COMPARING SUBACROMIAL INJECTION OF BETAMETHASONE AND XYLOCAINE TO XYLOCAINE ALONE IN CHRONIC ROTATOR CUFF TENDINOSIS

Background: It is common clinical practice to inject the subacromial space with cortisone in patients suffering from rotator cuff tendinosis; however, there is lack of scientific evidence for this practice.

Research question/s: Is a subacromial injection of betamethasone more effective than xylocaine alone in improving the quality of life, impingement sign, and range of motion in patients who have chronic rotator cuff tendinosis or partial rotator cuff tears?

Methodology:Subjects: 58 patients with rotator cuff tendinosis or partial cuff tear (>30 years, symptoms >6 months, failed physical therapy 6 weeks and NSAIDs for 2 weeks, >50% improvement with the Neer impingement test).

Experimental procedure: All subjects underwent an injection into the subacromial space containing either 5 mL of 2% xylocaine (CON = 28), 4 mL of 2% xylocaine and 1 mL (6 mg) of betamethasone (CORT = 30). Subjects were followed up at 2, 6, 12, and 24 weeks after injection.

Measures of outcome: The Western Ontario Rotator Cuff Index (WORC), American Shoulder and Elbow Surgeons (ASES) standardised form, Disabilities of the arm, shoulder and hand (DASH), active forward elevation, active internal rotation, active external rotation, and the Neer impingement sign.

Main finding/s: There were no significant differences between the CON and CORT groups for all outcomes and time intervals, and both groups showed improvement from baseline in all outcomes.


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Conclusion/s: Subacromial injection of betamethasone is …

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