The project will be carried out in several phases. The measurement of radiographs and preliminary implant design have been completed and fabrication of the prototype device is currently underway. A trial insertion of the device into cadaveric bones and mechanical testing of the device inserted into composite bones and subsequently into cadaveric bones will be performed. Increasingly fixation of lone bone fractures is performed with intramedullary devices inserted percutaneously. Intramedullary fixation does not disrupt the periosteal blood supply, and depending upon the degree of reaming, minimally disrupts the endosteal circulation as well.
Percutaneous entry minimizes the morbidity associated with an extensive surgical approach.
The proposed device will incorporate the proven technology of lag screw fixation proximally, and transfixation screws distally, providing both longitudinal and rotational stability. In addition, preliminary calculations suggest that intramedullary placement will align the implant optimally to carry the substantial compressive loads in this region of the femur. The device builds upon existing technology thereby reducing the morbidity associated with the current management of intertrochanteric fractures. The use of this device could be extended to diaphyseal fractures in instances where retrograde insertion is desirable. Contemporary Orthopaedics, August, 1982.