Costoclavicular Test

What is Thoracic outlet Syndrome?

Thoracic outlet syndrome is a collection of disorders characterized by the compression of nerves and blood vessels. At the same time, they traverse the thoracic outlet, a confined space bordered by the clavicle, first rib, and scalene muscles.

To diagnose TOS, one usually assesses the integrity of the neurovascular structures within this critical anatomical region with tests like the Eden test.

What is the Costoclavicular Test?

Also known as the Military Brace test or Eden test, the costoclavicular test is a diagnostic maneuver designed to assess the presence of thoracic outlet syndrome (TOS) in a patient. Healthcare professionals often employ the test to unravel the underlying causes of the symptoms in the condition, like pain, numbness, tingling, swelling, discoloration, or weakness in the arm or hand.

What happens during a Costoclavicular Test?

Procedure

During the test, the patient will be instructed to assume a military brace position by simultaneously retracting and depressing their shoulders. Doing this action narrows their thoracic outlet space, potentially reproducing the symptoms associated with TOS.

Result interpretation

The referring physician will consider it a positive test if there's a significant reduction in the vigor of the patient's normal radial pulse, which implies possible costoclavicular syndrome. It's also a positive if the client experiences more neurological symptoms in the upper extremities on that side.

Next steps

If the patient experiences a reproduction of symptoms during the test, it provides valuable information for healthcare providers to consider in the diagnostic process. Aside from the test, they may also employ other clinical assessments and imaging studies to establish a comprehensive diagnosis and develop an appropriate treatment plan.