Wright’s Test | Thoracic Outlet Syndrome Assessment
Thoracic Outlet Syndrome is defined as a neurovascular symptom complex associated with compression of the brachial bundle, which includes the brachial plexus and/or subclavian vessels. This compression may be caused by several anatomical structures in one or more of the following three compartments: the interscalene triangle, the costoclavicular space, or retropectoralis minor space.
The Wright’s test is designed to decrease the retropectoralis minor space in the first step, while the second part of the test implicates the costoclavicular interval.
Unclear descriptions in the performance of the Wright’s test in the study of Gillard et al. in 2001 prohibit any statement about the accuracy of this test. For this reason, the clinical value in practice is questionable.
To perform the test, the patient sits in a comfortable position. For the first part of the test, the patient’s arm is passively brought into abduction and external rotation to 90° without tilting the head. The elbow is flexed no more than 45°. The arm is then held for 1 min. The tester monitors the patient’s symptom onset and the quality of the radial pulse. The test is repeated with extremity in hyperabduction (end range of abduction).
A positive result is a decrease in the radial pulse and/or reproduction of the patient’s symptoms. Be aware, that other authors have described adding on the effect of cervical spine motion like flexion, extension, and left and right rotation.
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