Intramedullary Nailing Techniques for Femoral Shaft Fractures

Intramedullary nailing represents the mainstay surgical approach for femoral shaft fractures, offering biomechanical stability through load sharing and early mobilisation. The technique involves the insertion of a rigid rod into the medullary canal, either via an antegrade entry point at the proximal femur or a retrograde approach through the distal intercondylar notch. Reamed nails, in which the canal is sequentially enlarged to accommodate a larger implant, promote endosteal blood flow and improved fit, whereas unreamed systems aim to preserve intramedullary perfusion. Locking screws at one or both ends control rotation and axial alignment. Adjuncts such as blocking screws and cerclage wires are employed to aid reduction in comminuted or segmental fractures. Despite high union rates, challenges include malalignment, implant fatigue and nonunion, with risk factors encompassing inadequate canal fill, residual fracture gap and metabolic comorbidities. Recent advances focus on optimising nail design, instrumentation for percutaneous reduction and patient-specific planning using computer-assisted techniques to enhance accuracy and reduce operative morbidity.

Research from Nature Portfolio

Recent studies have examined segmental femoral shaft fractures, a complex pattern prone to delayed healing. A multicentre retrospective analysis evaluated patients treated with interlocked nailing for segmental fractures, identifying insufficient nail fill within the canal and residual fracture gaps as principal predictors of nonunion. Those with inadequate implant-to-bone contact exhibited a markedly higher incidence of revision surgery. The work underscores the importance of precise canal reaming and fragment apposition, suggesting that optimised canal preparation protocols may reduce failure rates in high-risk fracture configurations.

Intramedullary Nailing Techniques for Femoral Shaft Fractures publication trend

The graph below shows the total number of articles in intramedullary nailing techniques for femoral shaft fractures across all publications each year (not limited to Nature Index journals).

Technical terms

Intramedullary nailing: Insertion of a load-bearing rod into the bone’s medullary canal to stabilise a fracture.

Reaming: Sequential enlargement of the medullary canal to accommodate a larger nail and improve cortical contact.

Nonunion: Failure of a fracture to heal within the expected time frame, often requiring secondary intervention.

Segmental fracture: A fracture pattern in which the bone is broken in at least two distinct locations, resulting in an isolated intermediate fragment.

Augmentative plating: Application of a cortical plate and screws around an existing nail to enhance fixation in cases of nonunion or instability.

References

1. A multicenter study of factors affecting nonunion by radiographic analysis after intramedullary nailing in segmental femoral shaft fractures. Scientific Reports (2023).
2. Management of Traumatic Femur Fractures: A Focus on the Time to Intramedullary Nailing and Clinical Outcomes. Diagnostics (2023).
3. Reamed versus unreamed intramedullary nailing for the treatment of femoral fractures. Medicine (2016).
4. Plate Augmentation in Aseptic Femoral Shaft Nonunion after Intramedullary Nailing: A Literature Review. Bioengineering (2022).