Diagnostic value of triangle shadow change on lateral radiograph of the wrist joint in intractable dislocation / 实用放射学杂志

ABSTRACT

Objective To investigate the diagnostic value of triangular shadow changes in carpus dislocation.Methods 68 patients with carpal dislocation underwent frontal and lateral X-ray films.The changes of triangular shadow on lateral films were evaluated based on imaging findings of normal wrist joints.Results Changes of triangular shadow were found in 65 (95.59％)patients,while 3 (4.41％)patients had no changes.There were 17 patients with simple carpal dislocation,in which 15 cases showed triangular shadow changes, while 2 patients showed no changes.Thirty-two patients got pericarpal dislocation,in which 31 cases with triangular shadow changes and 1 case without any changes.The triangular shadow changes were observed in all 19 patients with trans-carpal carpal dislocation or trans-carpal pericarpal dislocation.Conclusion The changes of triangular shadow are helpful in the diagnosis of carpal dislocation, it is difficult to diagnose carpal lateral dislocation.