Key Takeaways:
- The Crank Test is a non-invasive movement test that doctors can use to help identify labral tears in the shoulder.
- This is only one of several movement tests, like the Mayo Shear test, that your doctor may perform to identify where pain is originating from.
- Labral tears usually result from acute trauma or repetitive shoulder motion and are common in swinging or throwing athletes, or workers who lift heavy objects every day.
Similar to the Mayo Shear Test, the Crank Test is another movement-based test that requires no medical instruments and can be performed anywhere.
How To Do a Shoulder Crank Test
- Bring the patient’s arm to a 90 degree from their body
- Bend the elbow to 90 degrees, with the hand facing up
- Apply an axial load to the humerus (push the elbow into the shoulder)
- Internally and externally rotate the arm as you maintain the axial load
If you feel a clunk or a click, particularly when externally rotating the arm, there may be a labral tear in the shoulder.
What is the Difference Between a Crank Test and a Mayo Shear Test?
The three most common types of labral tears include:
- SLAP Lesion – a tear that occurs on the upper part of the socket. This kind of tear also affects the bicep tendon.
- Bankart Lesion – a tear that occurs at the bottom of the socket. This normally results from a shoulder dislocation.
- Posterior Labrum Tear – a tear that occurs at the back of the socket. Wear and tear or acute injuries are commonly the culprits for this type of tear.
Mayo Shear tests usually help to identify Bankart Lesions (Lennard Funk, Shoulder Examination Tests) and posterior labrum tears while Crank tests help to identify SLAP lesions. They utilize different movements and body mechanics, and the results target pain in different areas of the shoulder.
Frequently Asked Questions About the Crank Test and SLAP Tears
- What is a SLAP Lesion?
- A SLAP lesion is also known as a SLAP tear, which stands for Superior Labrum, from Anterior to Posterior tear. It occurs on the upper part of the glenoid socket. This kind of tear also affects the bicep tendon. Damaged or torn labrums often result from either acute trauma or repetitive shoulder motion (OrthoInfo). In many cases, this leads to shoulder pain (especially with overhead activities), shoulder instability, and other symptoms such as:
- Dislocations
- Sensations or noises of catching, locking, popping, or grinding
- Increased shoulder pain at night
- Decreased range of motion
- Loss of strength
- A SLAP lesion is also known as a SLAP tear, which stands for Superior Labrum, from Anterior to Posterior tear. It occurs on the upper part of the glenoid socket. This kind of tear also affects the bicep tendon. Damaged or torn labrums often result from either acute trauma or repetitive shoulder motion (OrthoInfo). In many cases, this leads to shoulder pain (especially with overhead activities), shoulder instability, and other symptoms such as:
- What are the next steps if a Shoulder Crank Test generates pain?
- If a Crank Test is causing pain, there is a possibility that you have torn your labrum. SLAP tears that are left untreated may lead to chronic shoulder pain and instability. If this test causes pain and a click, it is best to contact a doctor for a diagnosis. In the meantime, it is recommended that you rest your shoulder and abstain from activities that require overhead motion or heavy shoulder lifting.
- How is a SLAP lesion treated?
- SLAP lesions can take up to a year to heal, and can be treated either conservatively or surgically.
- Conservative treatments should be the first thing that a doctor prescribes. This can include rest or modified activity, physical therapy, and over-the-counter pain medication.
- Surgical treatments may be recommended if the pain gets to a point that it interferes with daily activities. The operation reattaches the torn labrum to the shoulder socket, which improves stability.
- SLAP lesions can take up to a year to heal, and can be treated either conservatively or surgically.
If you or someone you love has suffered a shoulder labrum tear in the Louisville, Kentucky-area, board certified sports medicine physician Dr. Stacie Grossfeld at Orthopaedic Specialists PLLC can help. Orthopaedic Specialists PLLC is accepting new patients, and same day appointments are available. For additional information or to schedule an appointment, please contact Orthopaedic Specialists PLLC today at 502-212-2663.
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