Preoperative Prediction of Hamstring Tendon Graft Size for Arthroscopic Anterior Cruciate Ligament Reconstruction with Mri

Abstract

Background: The cross-sectional area (CSA) and length of an individual's hamstring tendons are both variable, making it challenging for the operating surgeon to generate an ideal size graft during arthroscopic anterior cruciate ligament (ACL) reconstruction surgery. This study aimed to determine the reliability and accuracy of MRI in predicting quadruple hamstring graft diameter for ACL reconstruction, to determine the statistical correlation between the CSA of hamstring tendons without any graft complications.On MRI and intraoperative quadruple hamstring graft diameter, and to find out the minimum CSA of hamstring tendons (ST+GR) required for an 8 mm quadruple hamstring graft diameter. Methods: This prospective diagnostic study included 52 patients diagnosed with complete ACL rupture. On MRI, we assessed the CSA of the semitendinosus and gracilis tendons at two levels: one at the joint line and the other at the level where the anteroposterior (AP) diameter of the medial femoral condyle is longest.The cutoff CSA required for a graft of sufficient size was calculated using simple logistic regression analysis.