What is a Full Can Test?
The Full Can Test is a critical tool in the orthopedic evaluation toolbox. As a simple, non-invasive clinical examination technique, it is pivotal in evaluating the health and function of the supraspinatus muscle and tendon. These two components are part of the rotator cuff, a group of muscles and tendons that provide stability and mobility to the shoulder joint.
The Full Can Test and its counterpart, the Empty Can Test, often perform together as the full can empty can test. Both tests follow a similar protocol, but the position of the patient's thumbs differentiates them. In the Full Can Test, the patient's thumbs point upwards, mimicking the action of holding a full can. Conversely, in the Empty Can Test, the thumbs point downwards, as if emptying a can.
These tests aim to identify potential shoulder injuries, particularly those involving the rotator cuff. They can help detect rotator cuff tears, supraspinatus tendinopathy, or impingement syndromes. The examiner applies downward pressure on the patient's extended arms while the patient resists. Any pain or weakness experienced during this process can indicate a problem.
The Full Can Test, while simple, provides valuable insights into the shoulder's function and health. It can aid in the early detection of injuries, guide treatment decisions, and even monitor rehabilitation progress. Combined with a comprehensive clinical assessment, the Full Can Test can significantly contribute to effective and efficient patient care in orthopedic practice.












