ROOS TEST FOR THORACIC OUTLET SYNDROME (TOS) The Roos test has a sensitivity of 84% and a specificity of 30% (Gillard et al. 2001) and stresses all three interfaces (posterior scalene port, costoclavicular space and subcoracoid tunnel) where the brachial plexus can become compressed. (Watson et al. 2010). Watch out as the very low specificity of 30% means that this test will create a high number of false positives! | Physiotutors

ROOS TEST / ELEVATED ARM STRESS TEST FOR TOS 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 Roos Test is believed to stress all three intervals since this po