Intraoperative Traction Technique for Hip Fracture Fixation
There is no high-quality evidence comparing bilateral (two-leg) versus unilateral (single-leg) traction during operative fixation of hip fractures on a fracture table, and current AAOS guidelines do not address this specific intraoperative positioning question.
Key Findings from Available Evidence
What the Guidelines Actually Address
The 2022 AAOS Clinical Practice Guidelines for Management of Hip Fractures in Older Adults provide a strong recommendation against preoperative traction (meaning traction applied before surgery while the patient awaits operative intervention) 1. This recommendation specifically addresses pre-surgical traction for pain management or fracture stabilization—not the intraoperative traction technique used during the actual surgical procedure on a fracture table.
The Evidence Gap
The provided guidelines [@1-8@] comprehensively address:
- Surgical timing (24-48 hours)
- Implant selection (cephalomedullary devices vs. sliding hip screws)
- Arthroplasty approaches
- Anesthesia type
- Perioperative medications (tranexamic acid, multimodal analgesia)
However, none of these guidelines specify whether bilateral or unilateral leg traction should be used intraoperatively when positioning patients on a fracture table.
What the Research Shows About Traction Tables
Recent comparative studies have examined traction table versus non-traction table positioning (lateral decubitus), but these do not address your specific question about one-leg versus two-leg traction:
Traction Table vs. Lateral Decubitus Studies
A 2025 meta-analysis of RCTs 2 comparing supine positioning on traction tables versus lateral decubitus positioning found:
- Longer setup time with traction tables (mean difference 6.99 minutes, p<0.001)
- No differences in reduction quality, operative time, fluoroscopy time, tip-apex distance, or collodiaphyseal angle
- Both techniques achieved equivalent clinical outcomes
A 2017 prospective randomized study 3 of 82 patients with unstable intertrochanteric fractures found the lateral decubitus position (without traction table) had:
- Shorter setup time, surgical time, and fluoroscopy exposure
- Better collodiaphyseal angles
- Equivalent tip-apex distance and reduction quality
Important Caveat
These studies compare using versus not using a traction table entirely—they do not examine whether bilateral versus unilateral traction on the fracture table itself produces different outcomes. The question of one-leg versus two-leg traction during the actual surgical procedure remains unaddressed in the published literature.
Clinical Practice Recommendation
In the absence of evidence specifically comparing bilateral versus unilateral traction techniques on fracture tables, the choice should be guided by:
- Fracture pattern and stability - More unstable fractures may benefit from bilateral traction to control rotation and length
- Surgeon experience and preference - Use the technique that allows optimal reduction and visualization
- Patient anatomy - Contralateral hip pathology or leg length discrepancy may favor unilateral traction
- Equipment availability - Some fracture tables are designed specifically for unilateral traction
The critical factors that do have strong evidence are:
- Achieving anatomic reduction (tip-apex distance <25mm)
- Appropriate implant selection based on fracture pattern 1
- Operating within 24-48 hours of admission 1
- Avoiding preoperative (pre-surgical) traction 1
The method of intraoperative traction (one leg vs. two legs) should prioritize whatever technique best achieves anatomic reduction with the least setup time and radiation exposure, as these factors have demonstrated impact on outcomes in the available literature 2, 3.