Comparison Between Subacromial Ultrasound Guided and Systemic Steroid Injection for Frozen Shoulder

This study aim to compare the efficacy of guteal muscle injection and subacromial ultrasound guided injection to treat frozen shoulder. Firstly, in order to calculate the sample size correctly, we start the preliminary study. Besides, in order to propose clinical new technology which combines the advantages of the two therapies, improve the efficacy ratio of frozen shoulder therapy, and provide a frozen shoulder treatment plan according to health economics.