Concordance in the measurement of the distance between the anterior tibial tuberosity to the trochlear groove in axial tomography of the patella at 20 degrees of flexion with respect to 0 degrees
DOI:
https://doi.org/10.53903/01212095.238Keywords:
Patellofemoral pain syndrome, Abdominal pain, Computed axial tomographyAbstract
Background: Patellofemoral malalignment is a frequent pathology in young people. With an early diagnosis, a timely intervention can be made, so the distance between the intertrochlear Groove and the anterior tibial tuberosity (ICG-ATT) is essential to indicate which patients need surgery. Currently patellar axial tomography is taken with cuts at 0, 20 and 45 degrees of flexion, although there is not enough information in the literature that specifies and justifies which degrees of flexion should be used, the purpose of the study is to establish the protocol for patellar axial tomography. Objective: To establish whether there is agreement between the ICG-ATT measurement performed at 20 and 0 degrees of flexion. Methods: A concordance study was carried out, 90 patients were taken for a total of 180 knees, and ICG-ATT measurement performed on these images, interposing cuts at 0 degrees and 20 degrees of flexion, to evaluate if there is agreement between the two measurements. Results: There is an almost perfect agreement of 0.909 between the measurement at 0 and 20 degrees of flexion on the left side and an almost perfect agreement of 0.8872 between the measurement at 0 and 20 degrees of flexion on the right side of the images. evaluated. Conclusions: Near perfect agreement was found between the ICG-ATT measurement performed at 0 and 20 degrees of flexion, meaning that there is no difference in taking the measurement at these degrees. We propose that patellar CT protocols should be taken at 20 degrees, supported by the biomechanics of the knee, because the stability of flexion at 20 degrees is based primarily on bone restriction as well as decreased radiation dose. We suggest future research with standardized protocols at 20 degrees of flexion.
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