The PFNA (Proximal Femoral Nail Antirotation) Intramedullary Nail is an orthopedic implant system designed for the surgical treatment of proximal femoral fractures, including intertrochanteric, subtrochanteric, and basilar neck fractures. The system is particularly suitable for fracture fixation in patients with osteoporotic bone.
The PFNA system features an intramedullary nail with an anti-rotation fixation design for the femoral head. Its deep-thread and stepped-thread configurations are designed to accommodate different bone qualities and femoral neck anatomies, while optional dynamic or static distal locking provides flexibility for different fracture fixation requirements.
The fixation element extends into the femoral head to provide anti-rotation support and help maintain fixation stability, reducing the risk of lag screw cut-out.
The classic trapezoidal deep-thread configuration facilitates insertion and provides compression within the cancellous bone of the femoral head. The design is suitable for different bone qualities.
The stepped thread configuration is designed to accommodate patients with a relatively narrow femoral neck.
The nail incorporates a 5° lateral offset and a 1500 mm anterior bow, designed to better correspond to the physiological anatomy described for the Chinese patient population.
The system provides optional dynamic or static locking to accommodate different fracture fixation requirements.
The distal design is intended to distribute mechanical stress more effectively and help reduce postoperative discomfort and the risk of periprosthetic fracture.
Intramedullary Load Sharing: The intramedullary nail helps control the axial load path across the fracture site. Locking fixation provides enhanced resistance to rotational forces and helps reduce mechanical stress on the nail.
Closed Nailing Technique: The closed insertion technique minimizes soft-tissue stripping and allows fracture fixation without directly exposing the fracture site, helping reduce surgical soft-tissue disruption.
Preservation of the Fracture Environment: Closed nailing helps preserve the fracture hematoma and periosteal blood supply. Reaming debris may also remain around the fracture site and contribute to the local bone-healing environment.
Limited Implant Removal Procedure: The intramedullary nail generally does not require routine removal. When removal is clinically necessary, the procedure can be performed through relatively limited incisions at the locking screw and nail ends.
Stress Distribution: The intramedullary fixation system provides stress distribution between the implant and the surrounding bone, helping reduce excessive stress shielding.
The PFNA Intramedullary Nail is designed for internal fixation of femoral fractures, including:
Femoral shaft fractures
Femoral neck fractures, including fractures combined with femoral shaft fractures
Intertrochanteric fractures, including fractures combined with femoral shaft fractures
| Diameter (mm) | Length (mm) |
|---|---|
| 10 | 180 |
| 10 | 200 |
| 11.5 | 180 |
| 11.5 | 200 |
| 13 | 180 |
| 13 | 200 |
| Diameter (mm) | Length (mm) |
|---|---|
| 10 | 300 |
| 10 | 320 |
| 10 | 340 |
| 10 | 360 |
| 10 | 380 |
| 10 | 400 |
| 10 | 420 |
| 11.5 | 260 |
| 11.5 | 300 |
| 11.5 | 320 |
| 11.5 | 340 |
| 11.5 | 360 |
| 11.5 | 380 |
| 11.5 | 400 |
| 11.5 | 420 |
| 13 | 300 |
| 13 | 320 |
| 13 | 340 |
| 13 | 360 |
| 13 | 380 |
| 13 | 400 |
| 13 | 420 |
| Diameter (mm) | Length (mm) |
|---|---|
| 10 | 300 |
| 10 | 320 |
| 10 | 340 |
| 10 | 360 |
| 10 | 380 |
| 10 | 400 |
| 10 | 420 |
| 11.5 | 260 |
| 11.5 | 300 |
| 11.5 | 320 |
| 11.5 | 340 |
| 11.5 | 360 |
| 11.5 | 380 |
| 11.5 | 400 |
| 11.5 | 420 |
| 13 | 300 |
| 13 | 320 |
| 13 | 340 |
| 13 | 360 |
| 13 | 380 |
| 13 | 400 |
| 13 | 420 |
