Radiocarpal dislocation--classification and rationale for management.

Radiocarpal dislocation is a rare injury. The authors reviewed seven cases with this injury and identified two groups of patients. Type I involves a dislocation of only the radiocarpal joint, while Type II involves intercarpal dislocation also. Four patients were included in Type I dislocation (3 dorsal and 1 volar). The other three patients had Type II dislocations, all of which were volar dislocations. Two patients had evidence of injury to the median and ulnar nerves at the time of the injury and both recovered completely. Closed reduction was possible with good results in three patients with Type I dislocation. All patients with Type II dislocation required open reduction and all had residual problems. The distinction between Type I and Type II is essential in order to evaluate the full extent of the injury. Closed reduction should always be attempted in Type I dislocation. Type II dislocation should be treated by open reduction and repair of all torn ligaments.