Lateral pivot shift (O’Driscoll). Patient supine, affected limb overhead. With forearm supinated, valgus and axial loading applied, elbow is flexed from full extension. In posterolateral rotatory instability as the elbow is flexed the radial head subluxes/dislocates and is seen as a prominence posterolaterally. With flexion beyond 40 degrees the radial head suddenly reduces with a palpable and visible clunk. The test is best done under general anaesthesia for radial head dislocation and relocation to be seen. When this manoeuvre is performed with the patient awake, the test is positive in presence of apprehension.