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AC Joint Sprain

Shoulder > Acromioclavicular Joint Sprain

The acromioclavicular (AC) joint is made up of the outer end of the collarbone and the outer corner of the shoulder blade (the acromion). This joint is held together by many strong ligaments and is typically very stable. Overstretching of these ligaments due to trauma can result in an AC joint sprain, which often includes a visible deformity.  While the initial injury is painful, and the deformity may create cosmetic issues, most AC joint sprains are easily treated with physical therapy and do not result in long term disability.

 

Mechanism of Injury: Falling on the tip of the shoulder or an outstretched hand, or a blow to the outside of the shoulder can cause an AC joint sprain.

Contributing Factors: Contact sports, accidents, trauma, previous AC joint injuries.

Signs/Symptoms: Shoulder pain/soreness to the touch. Swelling and bruising over the joint. Visible “step off” deformity. Limited range of motion.  Pain with reaching overhead or across the body.

At Home Tests: Observe step-off deformity. Piano key sign (see video). AC Joint Compression Test (see video).

At Home Treatment: Avoid irritating movements.  Comfort care:  ice, NSAIDs.

 

When to Seek Help: Contact your physical therapist if there is a visible deformity, or if pain does not subside within 7 days. If there is pain along the collarbone, seek medical assessment for a possible clavicle fracture.

 

Treatment at Inspired Athletx: Soft tissue mobilization and dry needling greatly reduce the pain and muscle spasm associated with an AC joint injury. As pain and irritation subside, active mobility and strengthening exercises allow you to regain function (as early as your first session!). Click here to schedule a physical therapy evaluation with us.

 

Disclaimer: The content contained in this section of the website is intended for informational purposes only.  It does not constitute medical advice and is not intended to function as a substitute for a professional diagnosis or treatment from a licensed healthcare provider.

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