Estimation of the I.D.E.A.L point of anterior cruciate ligament reconstruction of the femoral tunnel by double median point method
Objective:To establish a simple and effective method for location estimation of the femoral tunnel based on double midpoints.Methods:Thirteen patients undergoing anterior cruciate ligament reconstruction using autologous tendon isometric length were included from August 2021 to December 2022.Of the 13 patients,femoral tunnel I.D.E.A.L point was prepared by double midpoint method.Preoperative physical examination and magnetic resonance imaging of the included patients indicated anterior cruciate ligament rupture.Scores of International Knee Documentation Committee(IKDC),Lysholm and VAS were compared before and after operation.Meanwhile,the x/t(%)and y/h(%)values of the double midpoint femur tunnel were compared with the ideal position of the Bernard grid quadrant after surgery.Results:Follow-up in 3 months showed that IKDC scores,Lysholm scores at 3 months after surgery were significantly increased,yet VAS scores were decreased(all P<0.05).There was no significant difference between the lateral Bernard grid quadrant x/t(%)and y/h(%)of knee joint and the ideal position[both x/t(%)and y/h(%)values were 25%](P>0.05).Conclusion:The double median point method appears a good approach to estimating the location of femoral tunnel in anterior cruciate ligament reconstruction.The intraoperative arthroscopic measurement is in good agreement with the Bernard grid quadrant measurement after surgery.