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Preoperative MRI assessment may identify inadequate semitendinosus tendons for ACL reconstruction
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Recently published results showed patients who underwent ACL reconstruction with semitendinosus tendons with a cross-sectional area of less than 13.2 mm2 or length of less than 81 mm were more likely to require augmentation.
Researchers measured the cross-sectional area and length of the semitendinosus tendon using preoperative MRI scans of 39 patients who underwent all-inside ACL reconstruction.
Results showed a wide variation of semitendinosus tendon cross-sectional area from 7.9 mm2 to 21.4 mm2 under two-times MRI magnification and from 8.5 mm2 to 20.7 mm2 under four-times MRI magnification. Researchers calculated Pearson’s coefficients of 0.50 and 0.59 for semitendinosus tendon cross-sectional area under two-times and four-times magnification, respectively.
Researchers found a correlation between MRI measurements of semitendinosus tendon length and intraoperatively measured tendon length and graft diameter. Cases that did not require graft augmentation had a greater average semitendinosus tendon cross-sectional area of 3.10 mm2 or greater average semitendinosus tendon length of 14.05 mm. Researchers noted an association between a minimum semitendinosus tendon cross-sectional area of 13.2 mm2 with graft diameter of 81 mm or greater. Similarly, a graft diameter of 8 mm or greater was associated with a minimum semitendinosus tendon length of 81 mm measured with MRI, according to results. – by Casey Tingle
Disclosures: The researchers report no relevant financial disclosures.
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