injuries poisoning
Perilunate and Lunate Dislocations
Key Points
Perilunate and lunate dislocations usually result from a fall on an outstretched hand or occur in a motor vehicle crash. Treat these dislocations promptly to prevent complications (eg, nerve damage, deterioration of the joint). Diagnose by plain x-rays (anteroposterior, lateral, and oblique views), with particular attention to the relationship between the radius, lunate, and capitate bones on a true lateral view. Reduce manually and splint the wrist and elbow in the neutral position. Refer patients immediately to an orthopedic surgeon because most of these dislocations must be surgically repaired to optimize function. 