What does the full can test test for?

Purpose. The Full Can Test is used to assess the function of Supraspinatus muscle and tendon of the shoulder complex.

How do you test for supraspinatus?

The supraspinatus can be tested by having the patient abduct the shoulders to 90 degrees in forward flexion with the thumbs pointing downward. The patient then attempts to elevate the arms against examiner resistance (Figure 3). This is often referred to as the “empty can” test.

What test is used to test for a supraspinatus tear?

Purpose. The drop arm test is used to assess for full thickness rotator cuff tears, particularly of the supraspinatus. This can be useful when diagnosing sub-acromial pain syndrome (shoulder impingment) or to differentiate between shoulder and rotator cuff pathologies.

Why does empty can test supraspinatus?

Therefore, the Empty Can Test must be questioned as a valid diagnostic tool for isolated supraspinatus pathology, due to the high activation of many shoulder muscles simultaneously. Empty can test as sensitivities of 88.6% and specificities of 58.8% in diagnosing the supraspinatus tendon tear.

What are 2 special tests for the rotator cuff?

A doctor might request one of several imaging tests to diagnosis your torn rotator’s cuff such as an x-ray, ultrasound, or magnetic resonance imaging(MRI). X-rays won’t show a torn rotator cuff but can rule out other causes of pain, such as bone spurs.

How can you tell the difference between a torn rotator cuff and impingement?

It differs from subacromial impingement syndrome where swelling due to repetitive or traumatic compression of structures causes pain and shoulder dysfunction, instead torn fibres of the muscle directly inhibit muscle function due to loss of structural integrity.

How do you manually test the supraspinatus muscle?

Concentrate on the shoulder girdle muscles (especially external and internal rotation, abduction). The supraspinatus may be isolated by having the patient rotate the upper extremity so that the thumbs are away from the floor and resistance is applied with the arms at 30° of forward flexion and 90° of abduction.

What are 3 special tests for the shoulder?


  • Adsons Test.
  • Anterior Drawer Test Of The Shoulder.
  • Apprehension Test.
  • Arm Squeeze Test.

What does a positive empty can test mean?

The test is considered positive if weakness, pain or both are present during resistance. A positive test result suggests a tear to the supraspinatus tendon or muscle, or neuropathy of the suprascapular nerve.

What is a positive Hawkins Kennedy test?

A positive Hawkins-Kennedy test is indicative of an impingement of all structures that are located between the greater tubercle of the humerus and the coracohumeral ligament. The impinged structures include the supraspinatus muscle, teres minor muscle, and the infraspinatus muscle.

What is the difference between empty can test and full can test?

The full-can position is described as holding the arm at 90° elevation in the scapular plane (30° anterior to the frontal plane) with full external rotation while the empty can position is achieved by holding the arm at 90° elevation in the scapular plane with full internal rotation (Figure 2).

How accurate is the empty can test?

There were 35 shoulders with full thickness tear of the supraspinatus tendon. The accuracy of the tests was the greatest when muscle weakness was interpreted as indicating a tom supraspinatus tendon in both the full can test (75% accurate) and the empty can test (70%) accurate).