COSTOCLAVICULAR MANEUVER FOR TOS This maneuver is thought to stress the costoclavicular interval where either the subclavian artery, vein or brachial plexus may be entrapped by structures such as subclavius or costocoracoid ligament. No diagnostic accuracy studies have been conducted reporting sensitivity or specificity values, which is why its clinical value remains questionable. The value of this battery of test positions is then also rather to evaluate which positions provoke and relieve symp