Paper Title
Painful Arc Test: Predictor for Short Term Pain Relief After Subacromial-Subdeltoid Bursa Injection

Subacromial-subdeltoid (SASD) bursa injection has been widely used to treat a range of shoulder conditions. The purpose of this study was to identify predictor of short-term pain relief after SASD bursa injection. The medical records of 150 patients treated with SASD bursa injection were reviewed in this retrospective study. An univariate logistic regression analysis demonstrated that positive painful arc test increased the odds of significant improvement 2 weeks after SASD bursa injection.(p=0.04, OR=3.98).The positive painful arc test is likely to predict a short term good response 2 weeks after SASD bursa injection. Keywords- shoulder injection, predictior, ultrasound, painful arc test.