Costoclavicular Maneuver for TOS holding each position for up to 30 s, while the patient rests his or her forearms on his thighs. The examiner simultaneously monitors a change in pulse and symptom onset and notes which positions exacerbate or ease symptoms. 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 evaluate which positions provoke and relieve sympto