Subacromial Impingement Syndrome (SAIS) also known as Shoulder Impingement Syndrome (SIS) is a common cause of 45 to 65 % of shoulder complaints. It is often misdiagnosed as frozen shoulder as some of its symptoms are similar to the first stage of frozen shoulder. It is a condition in which soft tissues become entrapped in the subacromial space leading to pain and inflammation of the structures. It includes a wide range of pathologies including rotator cuff tendinopathies, calcific tendinitis, subacromial bursitis and rotator cuff partial tears.
Subacromial space mainly consists of surface below the anterior one third of the acromion process, the coracoacromial ligament, along with the acromioclavicular joint and the humeral head below. When viewed radiographically the height of the space varies from 1 to 1.5 cm. The rotator cuff tendons, long head of biceps, and subacromial bursa are the structures located within the subacromial space. Any structural or biomechanical abnormality leads to narrowing of the subacromial space and leads to impingement of the structures located beneath.
Author(s) Details:
Tushara Nair,
College of Physiotherapy, Sumandeep Vidyapeeth (Deemed to be University), Vadodara, Gujarat, India.
G. P. Kumar,
College of Physiotherapy, Sumandeep Vidyapeeth (Deemed to be University), Vadodara, Gujarat, India.
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