A PROSPECTIVE EVALUATION OF A NEW PHYSICAL-EXAMINATION IN PREDICTING GLENOID LABRAL TEARS

We studied 62 patients (40 men and 22 women) with an average age of 28 years over a 28-month period who presented with shoulder pain that wa s refractory to 3 months of conservative management. Patients with a p rior glenohumeral dislocation or a rotator cuff tear were excluded, Th e ''crank'' test was performed with the arm elevated 160 degrees in th e scapular plane of the body, loaded axially along the humerus, and wi th maximal internal and external rotation. Although similar tests have been described, the crank test is a new examination previously unrepo rted, Half of the patients (31) had a positive crank test. Arthroscopy performed on all 62 patients revealed glenoid labral tears in 32 pati ents. Two patients who had positive crank tests did not have labral te ars but had partial-thickness, articular-side rotator cuff tears. The sensitivity of the crank test was 91%, the specificity was 93%, the po sitive predictive value was 94%, and the negative predictive value was 90%. With these data, the crank test fulfills the criteria as a singl e physical examination test that is highly accurate for the preoperati ve diagnosis of glenoid labral tears. Accordingly, expensive imaging m odalities currently used in this patient population may be employed le ss in the future.