Ulnar variance determination.
Surgical procedures concerning the distal articular surfaces of the radius and ulna, demand an accurate method of measurement of ulnar variance. A new method, which is a modification of the method described by Palmer (1982), is introduced. 100 randomly selected healthy persons were submitted to X-ray of the wrist and the ulnar variance was determined independently by three observers using both methods. By "weighted kappa" statistics the results, expressed in intra- and interobserver agreement, showed a significantly higher reliability in favour of the Modified method.
D006801:Humans; D011859:Radiography; D011884:Radius / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D013679:Technology, Radiologic; D014457:Ulna / Q000033:anatomy & histology / Q000000981:diagnostic imaging*