First rib resection is indicated for venous, arterial, and neurogenic TOS.[1] In all cases, the goal of the operation is to increase the dynamic space between the chest wall and the clavicle, through which the subclavian vein, artery, and the brachial nerve roots pass. [2]
Procedure
The first rib may be approached several different ways: from above the clavicle in an inferior direction (infraclavicular), from above the clavicle (supraclavicular), from the posterior neck, and from the armpitmedially (transaxillary).
While the operation universally involves removal of the first rib, depending on the indication for the operation, additional maneuvers may be performed. For venous thoracic outlet syndrome, removal of anterior scalene muscle (scalenectomy) and freeing up scar tissue around the subclavian vein (venolysis) are often also performed. If anomalous cervical ribs are present, these may be removed as well.