Description
The app "ACL-X" (Linova Software GmbH, Munich, Germany) is a tool that enables intuitive analysis of tunnel positions utilizing the quadrant method. The objective of this study was to analyze intra- and interobserver reliability of the app-based quadrant method for determining femoral tunnel position.
Methods
• Retrospectiv study, n= 50, primary ACLR, 4 observers, rerun by 2 observers after 4 weeks
Results
• Pearson‘s c.c. DR/HR: observer 1→ 0.94/0.81; observer 2 → 0.92/0.85
• ICC DR/HR: 0.92/0.84
• On average 59 ± 16 seconds per measurement
Conclusion
• The app-based quadrant method has almost perfect intra- and interobserver reliability
• "ACL-X" can provide a quick and reliable control of the femoral tunnel position
• Especially for inexperienced surgeons or in revision surgery, the method could be a useful support
