2021 ISAKOS Biennial Congress ePoster
Correlation Between Arthro-MRI Results And Intraoperative Hip Arthroscopy Findings In Fai Syndrome
Christian Sobau, MD, Pforzheim GERMANY
Konstantinos Tramountanis, MD, Reutlingen GERMANY
Wolfgang Miehlke, MD, Pforzheim GERMANY
Alexander Zimmerer, MD, Pforzheim GERMANY
ARCUS Sportklinik, Pforzheim, GERMANY
FDA Status Not Applicable
Summary
Arthro-MRI showed good sensitivities for both cartilage and all labrum lesions, so that a preoperative Arthro-MRI can provide important information regarding the present pathologies and should therefore be performed routinely.
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Abstract
Background
In recent years, hip arthroscopy has established itself as the gold standard in the treatment of FAI syndrome. Arthro-MRI of the affected hip joint should be performed as standard for preoperative diagnosis. The aim of the study was to establish a correlation between Arthro-MRI and arthroscopic findings.
Methods
Based on our in-house database, all patients who received Arthro-MRI and subsequent arthroscopic therapy for FAI syndrome in our clinic between January 2014 and December 2015 were identified. In these patients the Arthro-MRI findings were retrospectively compared with the intraoperative findings and sensitivity/specificity as well as positive and negative predictive values for labrum and cartilage damage were calculated.
Results
During this period, 138 patients received Arthro-MRI in our clinic with following arthroscopic therapy of FAI syndrome. A sensitivity of 84% (CI 95% interval: 78 - 90%) and a specificity of 37% (CI 95% interval: 29 - 45%) could be calculated for cartilage damage. The PPW was 83%, the NPW 36%.
A sensitivity of 84% (CI 95% interval: CI 95% interval: 77 - 90%) and a specificity of 37% (CI 95% interval: 27 - 42%) could be found for all labrum lesions. The PPW was 75%, the NPW 51%.
A subgroup analysis according to the Czerny classification showed specificities between 88% (stage 1), 80% (stage 2) and 100% (stage 2) for each stage of the labrum lesion. The corresponding sensitivities were 57% (stage 1), 69% (stage 2) and 15% (stage 3).
Conclusion
Arthro-MRI showed good sensitivities for both cartilage and all labrum damage with correspondingly reduced specificities. The subgroup analysis of the labrum damage showed high specificities, so that a preoperative Arthro-MRI can provide important information regarding the present pathologies and should therefore be performed routinely.