Abstract: Objective To explore the correlation between the diameter of patients’ autologous tendon and the prognosis of anterior cruciate ligament (ACL) reconstruction surgery.Methods From October 2018 to October 2023,82 patients who underwent anterior cruciate ligament reconstruction surgery at Wuxi No.904 Hospital were selected.Based on whether complications occurred after the anterior cruciate ligament reconstruction surgery,they were divided into a group with good prognosis (n=64) and a group with poor prognosis (n=18).Performing univariate analysis on the prognosis of anterior cruciate ligament reconstruction surgery.Pearson correlation analysis was used to analyze the relationship between tendon diameter and prognosis.A multifactorial Logistic regression model was applied to analyze the factors influencing the prognosis of ACL reconstruction and construct a nomogram.The diagnostic efficacy of tendon diameter on the prognosis of ACL reconstruction was analyzed using the receiver operating characteristic (ROC) curve.Results The results of the univariate analysis showed that there were statistically significant differences in gender and age between the two groups (P<0.05).The tendon diameter and cross-sectional area in the group with a good prognosis were higher than those in the group with a poor prognosis (P<0.05).Post-treatment,the Lysholm,Tegner,and IKDC scores in the group with a good prognosis were higher than those in the group with a poor prognosis(P<0.05).Pearson correlation analysis showed a significant positive correlation between the patient’s tendon diameter and Lysholm,Tegner,and IKDC scores(r=0.417,0.411、0.446，P<0.05).Logistic analysis indicated that gender,age,tendon diameter,and tendon cross-sectional area are factors affecting the prognosis of ACL reconstruction (P< 0.05).The ROC curve results showed that the combined diagnostic effect of gender,age,tendon diameter,and cross-sectional area is significantly better than any single factor alone.Conclusion There is a significant correlation between the patient’s autologous tendon diameter and the prognosis of ACL reconstruction surgery.An increase in autologous tendon diameter enhances knee joint function and improves patient prognosis.

Key words: autologous tendon diameter; anterior cruciate ligament reconstruction surgery; knee joint function; prognosis