科研之友
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摘要
Purpose Distortion in arthroscopic views can interfere with accurate graft placement in ACL reconstruction, yet the effect of arthroscopic lens angle and portal location on image distortion is unknown. The purpose of this study was to quantify the image distortion resulting from the use of angulated arthroscope lenses through multiple portals, thereby identifying the optimal parameters to minimize distortion. A uniform grid of dots was attached to the lateral wall of the intercondylar notch of a Sawbones(A (R)) knee model. The inferior half of the lateral wall was divided equally along the distoproximal axis into three regions-shallow, central, and deep. Each region was imaged using five different arthroscopic configurations [0A degrees arthroscope through anteromedial (AM) portal, 30A degrees arthroscope through AM and anterolateral (AL) portals, 70A degrees arthroscope through AM and AL portals]. For each configuration, the differences in magnification and deformity ratios between the three regions were calculated. Less than 100 % of central region magnification was observed in the deep region, while more than 100 % was found in the shallow region. The AL approach produced larger magnification errors in the shallow region, as compared to the AM approach. Deformity ratios less than 100 % were found with both 0A degrees and 30A degrees arthroscopes, whereas deformity ratios exceeding 100 % were found with 70A degrees arthroscopes. The least distorted and the most consistent image of the femoral ACL insertion is provided through the AM portal using either a 30A degrees or 70A degrees arthroscope lens. Surgeons should carefully select the arthroscope and portal to minimize image distortion and ensure accurate surgical procedure.
- 出版日期2016-6
