Effect of immediate weightbearing on plated fractures of the humeral shaft

Background: This study evaluated the effect of immediate weightbearing on fractures of the humeral shaft treated with dynamic compression plates. Methods: Eighty-three fractures met the inclusion criteria. The weightbearing status of the humerus was based on associated injuries and not the fracture pattern. There were no differences between the weightbearing and nonweightbearing groups in patient or fracture demographics. Results: Ninety-four percent of the fractures healed after the initial operation. Two in the nonweightbearing group and three in the weighthearing group required a second operation to achieve union. Alignment did not differ between the two groups. Immediate full weightbearing had no effect on the union or malunion rate. Conclusion: When indicated, open reduction and internal fixation of the diaphysis of the humerus, followed by immediate weighthearing through the involved humerus, is a safe and efficacious procedure.