Расстояние между сухожилием надколенника и латеральным гребнем может предсказывать нестабильность коленного сустава

Patellar tendon-lateral trochlear ridge distance may predict patellofemoral instability Key takeaways: - Patellar tendon-lateral trochlear ridge distance may be an indicator for patellofemoral instability. - Patellar tendon-lateral trochlear ridge measurement greater than 4.6 mm correctly identified instability. PHOENIX — Results presented at the Arthroscopy Association of North America Annual Meeting showed patellar tendon-lateral trochlear ridge distance may be a reliable measurement for predicting patellofemoral instability. “[Patellar tendon-lateral trochlear ridge] distance demonstrated higher sensitivity than [tibial tubercle-trochlear groove],” Adam J. Tagliero, MD, associate program director for the Mayo Clinic Sports Medicine Fellowship, said in his presentation. “Surgeons may consider utilizing these measurements in conjunction in the office, since they are all done on axial MRI measurements.” Tagliero and colleagues conducted a matched-pair analysis during a 3-year period of 50 patients undergoing primary patellofemoral stabilization surgery and 50 patients with no history of patellofemoral instability. Researchers matched the cohort by age, sex and laterality, and collected tibial tubercle-trochlear groove (TT-TG), tibial tuberosity to posterior cruciate ligament (TT-PCL) and patellar tendon-lateral trochlear ridge (PT-LTR) measurements using axial MRI scans. Patients with a PT-LTR distance greater than 4.6 mm were more likely to be part of the patellofemoral instability cohort. This threshold measurement was “92% specific for the presence of patellofemoral instability,” according to Tagliero. “Not everyone who takes care of patients with patellofemoral instability is familiar with [PT-LTR measurement], or has a lot of exposure to it, because it is relatively new.... It is useful as a composite measure for instability and may better identify patellofemoral instability than some of the traditional measurements that we use in isolation,” Tagliero told Healio. “I hope [our data] pushes forward further research and discussion around how PT-LTR can become part of a more nuanced evaluation algorithm.” For more information: Adam J. Tagliero, MD, can be contacted at [email protected].