The PFNA blade typically features a diameter of 10.0mm.
Understanding the PFNA Blade and Its Specifications
The Proximal Femoral Nail Antirotation (PFNA) system is a widely used orthopedic implant designed to treat complex fractures of the proximal femur, particularly intertrochanteric and subtrochanteric fractures. A critical component of this system is the PFNA blade, which plays a pivotal role in achieving stable fixation and enabling early patient mobilization.
The precise diameter of the blade is essential for its structural integrity and its ability to securely engage with the bone, providing the necessary stability for fracture healing. Manufacturers engineer these blades with specific dimensions to ensure optimal surgical outcomes.
Key Features of the PFNA Blade
PFNA blades are designed with advanced features to enhance their performance and ease of use in surgical procedures. These include:
- Diameter: A standard 10.0mm diameter ensures robust engagement within the femoral head.
- Material Options: Blades are available in both Titanium and Stainless Steel, offering surgeons flexibility based on patient needs and clinical considerations. Both materials are known for their biocompatibility and mechanical strength.
- Length Variability: The blades are offered in a range of lengths, typically from 60mm to 130mm, to accommodate diverse anatomical requirements and fracture patterns.
- Helical Blade Self-locking Device: This innovative mechanism contributes to secure fixation within the bone, preventing rotation and migration of the blade post-insertion.
- Unique Profile and Lock System: The blade features a distinctive profile combined with a specialized lock system, engineered to maximize stability.
- Unique Compression Technique: This advanced technique aids in achieving stable bone fragment compression, which is crucial for fracture reduction and healing.
Summary of PFNA Blade Specifications
To provide a clear overview, the key specifications of the PFNA blade are summarized below:
| Feature | Specification |
|---|---|
| Diameter | 10.0mm |
| Available Lengths | 60mm to 130mm |
| Material | Titanium, Stainless Steel |
| Locking Mechanism | Helical Blade Self-locking device |
| Design Elements | Unique Profile, Lock System, Compression Technique |
Importance of Blade Diameter in Orthopedic Surgery
The diameter of an orthopedic implant like the PFNA blade is a critical design parameter that directly impacts surgical efficacy and patient recovery. A carefully selected diameter ensures:
- Optimal Fit and Stability: The 10.0mm diameter is engineered to provide a snug fit within the prepared bone tunnel, maximizing the interface with the cancellous bone for enhanced primary stability.
- Load Bearing Capacity: A robust diameter contributes to the implant's ability to withstand physiological loads, reducing the risk of implant failure or migration during the healing process.
- Minimizing Bone Damage: While providing stability, the diameter is also chosen to minimize unnecessary bone removal during insertion, preserving bone stock.
- Biomechanical Performance: The specific diameter works in conjunction with the blade's helical design and compression capabilities to provide strong antirotation and controlled collapse, facilitating effective fracture healing.
For more information on the principles of femoral nailing and orthopedic fracture fixation, reputable resources such as the AO Foundation offer comprehensive insights.
